./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:18:25,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:18:25,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:18:25,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:18:25,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:18:25,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:18:25,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:18:25,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:18:25,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:18:25,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:18:25,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:18:25,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:18:25,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:18:25,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:18:25,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:18:25,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:18:25,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:18:25,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:18:25,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:18:25,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:18:25,266 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:18:25,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:18:25,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:18:25,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:18:25,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:18:25,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:18:25,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:18:25,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:18:25,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:18:25,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:18:25,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:18:25,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:18:25,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:18:25,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:18:25,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:18:25,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:18:25,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:18:25,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:18:25,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:18:25,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:18:25,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:18:25,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:18:25,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:18:25,301 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:18:25,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:18:25,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:18:25,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:18:25,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:18:25,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:18:25,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:18:25,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:18:25,303 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:18:25,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:18:25,304 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:18:25,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:18:25,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:18:25,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:18:25,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:18:25,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:18:25,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:18:25,305 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:18:25,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:18:25,306 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:18:25,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:18:25,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:18:25,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:18:25,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:18:25,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:18:25,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:18:25,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:18:25,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:18:25,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:18:25,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:18:25,308 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:18:25,308 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:18:25,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:18:25,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2022-07-19 21:18:25,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:18:25,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:18:25,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:18:25,594 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:18:25,594 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:18:25,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-07-19 21:18:25,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4910dcbb/aa2d2d56c02b4ac08575b39b68ad58d7/FLAG71f9c8ff2 [2022-07-19 21:18:26,279 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:18:26,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-07-19 21:18:26,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4910dcbb/aa2d2d56c02b4ac08575b39b68ad58d7/FLAG71f9c8ff2 [2022-07-19 21:18:26,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4910dcbb/aa2d2d56c02b4ac08575b39b68ad58d7 [2022-07-19 21:18:26,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:18:26,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:18:26,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:18:26,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:18:26,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:18:26,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:18:26" (1/1) ... [2022-07-19 21:18:26,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffba902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:26, skipping insertion in model container [2022-07-19 21:18:26,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:18:26" (1/1) ... [2022-07-19 21:18:26,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:18:26,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:18:26,947 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_22-deref_read_racefree.i[30176,30189] [2022-07-19 21:18:26,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:18:27,000 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:18:27,044 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_22-deref_read_racefree.i[30176,30189] [2022-07-19 21:18:27,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:18:27,119 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:18:27,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27 WrapperNode [2022-07-19 21:18:27,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:18:27,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:18:27,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:18:27,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:18:27,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (1/1) ... [2022-07-19 21:18:27,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (1/1) ... [2022-07-19 21:18:27,175 INFO L137 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-07-19 21:18:27,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:18:27,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:18:27,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:18:27,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:18:27,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (1/1) ... [2022-07-19 21:18:27,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (1/1) ... [2022-07-19 21:18:27,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (1/1) ... [2022-07-19 21:18:27,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (1/1) ... [2022-07-19 21:18:27,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (1/1) ... [2022-07-19 21:18:27,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (1/1) ... [2022-07-19 21:18:27,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (1/1) ... [2022-07-19 21:18:27,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:18:27,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:18:27,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:18:27,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:18:27,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (1/1) ... [2022-07-19 21:18:27,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:18:27,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:27,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:18:27,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:18:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:18:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:18:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:18:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:18:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:18:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-19 21:18:27,266 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-19 21:18:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:18:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:18:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:18:27,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:18:27,268 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:18:27,344 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:18:27,345 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:18:27,506 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:18:27,513 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:18:27,513 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-19 21:18:27,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:18:27 BoogieIcfgContainer [2022-07-19 21:18:27,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:18:27,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:18:27,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:18:27,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:18:27,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:18:26" (1/3) ... [2022-07-19 21:18:27,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8ae09c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:18:27, skipping insertion in model container [2022-07-19 21:18:27,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:27" (2/3) ... [2022-07-19 21:18:27,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8ae09c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:18:27, skipping insertion in model container [2022-07-19 21:18:27,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:18:27" (3/3) ... [2022-07-19 21:18:27,521 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2022-07-19 21:18:27,525 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:18:27,531 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:18:27,531 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:18:27,531 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:18:27,558 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:27,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 106 transitions, 217 flow [2022-07-19 21:18:27,613 INFO L129 PetriNetUnfolder]: 14/140 cut-off events. [2022-07-19 21:18:27,613 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:27,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 140 events. 14/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 315 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-07-19 21:18:27,616 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 106 transitions, 217 flow [2022-07-19 21:18:27,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 106 transitions, 217 flow [2022-07-19 21:18:27,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:27,640 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:27,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:27,682 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-19 21:18:27,684 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:27,684 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:27,685 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:27,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:27,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1463212038, now seen corresponding path program 1 times [2022-07-19 21:18:27,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:27,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659082444] [2022-07-19 21:18:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:27,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:27,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659082444] [2022-07-19 21:18:27,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659082444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:27,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:27,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:27,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928185349] [2022-07-19 21:18:27,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:27,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:27,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:27,906 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 106 [2022-07-19 21:18:27,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 217 flow. Second operand has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:27,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 106 [2022-07-19 21:18:27,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:27,930 INFO L129 PetriNetUnfolder]: 0/124 cut-off events. [2022-07-19 21:18:27,933 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:18:27,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 124 events. 0/124 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 14/134 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-07-19 21:18:27,935 INFO L132 encePairwiseOnDemand]: 96/106 looper letters, 1 selfloop transitions, 0 changer transitions 12/95 dead transitions. [2022-07-19 21:18:27,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 197 flow [2022-07-19 21:18:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 199 transitions. [2022-07-19 21:18:27,945 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9386792452830188 [2022-07-19 21:18:27,945 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 199 transitions. [2022-07-19 21:18:27,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 199 transitions. [2022-07-19 21:18:27,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:27,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 199 transitions. [2022-07-19 21:18:27,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,963 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,964 INFO L186 Difference]: Start difference. First operand has 99 places, 106 transitions, 217 flow. Second operand 2 states and 199 transitions. [2022-07-19 21:18:27,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 197 flow [2022-07-19 21:18:27,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 95 transitions, 197 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:27,974 INFO L242 Difference]: Finished difference. Result has 99 places, 83 transitions, 171 flow [2022-07-19 21:18:27,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=171, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2022-07-19 21:18:27,979 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2022-07-19 21:18:27,980 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 171 flow [2022-07-19 21:18:27,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:27,980 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:27,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:18:27,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1169809031, now seen corresponding path program 1 times [2022-07-19 21:18:27,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:27,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714277879] [2022-07-19 21:18:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:28,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714277879] [2022-07-19 21:18:28,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714277879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:28,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:28,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:28,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78823492] [2022-07-19 21:18:28,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:28,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:28,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:28,095 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 106 [2022-07-19 21:18:28,095 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:28,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 106 [2022-07-19 21:18:28,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:28,134 INFO L129 PetriNetUnfolder]: 0/87 cut-off events. [2022-07-19 21:18:28,135 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:28,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 87 events. 0/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-19 21:18:28,135 INFO L132 encePairwiseOnDemand]: 103/106 looper letters, 8 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-07-19 21:18:28,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 195 flow [2022-07-19 21:18:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2022-07-19 21:18:28,146 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8553459119496856 [2022-07-19 21:18:28,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2022-07-19 21:18:28,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2022-07-19 21:18:28,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:28,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2022-07-19 21:18:28,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,148 INFO L186 Difference]: Start difference. First operand has 99 places, 83 transitions, 171 flow. Second operand 3 states and 272 transitions. [2022-07-19 21:18:28,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 195 flow [2022-07-19 21:18:28,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 195 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:28,150 INFO L242 Difference]: Finished difference. Result has 90 places, 83 transitions, 179 flow [2022-07-19 21:18:28,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2022-07-19 21:18:28,151 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-07-19 21:18:28,151 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 179 flow [2022-07-19 21:18:28,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,151 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:28,151 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] [2022-07-19 21:18:28,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:18:28,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:28,152 INFO L85 PathProgramCache]: Analyzing trace with hash 602894772, now seen corresponding path program 1 times [2022-07-19 21:18:28,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:28,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160599646] [2022-07-19 21:18:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:28,207 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:28,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:28,277 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:28,277 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:28,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:28,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:18:28,279 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:18:28,281 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:28,281 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:18:28,302 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:28,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 128 places, 139 transitions, 290 flow [2022-07-19 21:18:28,350 INFO L129 PetriNetUnfolder]: 24/212 cut-off events. [2022-07-19 21:18:28,350 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:18:28,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 212 events. 24/212 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 591 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2022-07-19 21:18:28,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 139 transitions, 290 flow [2022-07-19 21:18:28,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 139 transitions, 290 flow [2022-07-19 21:18:28,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:28,362 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:28,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:28,369 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-19 21:18:28,370 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:28,370 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:28,370 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:28,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:28,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:28,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2146504794, now seen corresponding path program 1 times [2022-07-19 21:18:28,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:28,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127491373] [2022-07-19 21:18:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:28,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127491373] [2022-07-19 21:18:28,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127491373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:28,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:28,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:28,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978831760] [2022-07-19 21:18:28,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:28,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:28,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:28,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:28,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:28,404 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 139 [2022-07-19 21:18:28,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 139 transitions, 290 flow. Second operand has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:28,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 139 [2022-07-19 21:18:28,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:28,442 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2022-07-19 21:18:28,442 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:18:28,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 185 events. 0/185 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 443 event pairs, 0 based on Foata normal form. 26/205 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-07-19 21:18:28,443 INFO L132 encePairwiseOnDemand]: 123/139 looper letters, 2 selfloop transitions, 0 changer transitions 12/122 dead transitions. [2022-07-19 21:18:28,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 122 transitions, 260 flow [2022-07-19 21:18:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2022-07-19 21:18:28,448 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9280575539568345 [2022-07-19 21:18:28,448 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2022-07-19 21:18:28,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2022-07-19 21:18:28,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:28,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2022-07-19 21:18:28,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,452 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,452 INFO L186 Difference]: Start difference. First operand has 128 places, 139 transitions, 290 flow. Second operand 2 states and 258 transitions. [2022-07-19 21:18:28,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 122 transitions, 260 flow [2022-07-19 21:18:28,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 122 transitions, 258 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:28,457 INFO L242 Difference]: Finished difference. Result has 128 places, 110 transitions, 230 flow [2022-07-19 21:18:28,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=128, PETRI_TRANSITIONS=110} [2022-07-19 21:18:28,458 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 0 predicate places. [2022-07-19 21:18:28,458 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 110 transitions, 230 flow [2022-07-19 21:18:28,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,459 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:28,459 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:28,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:18:28,459 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1855059495, now seen corresponding path program 1 times [2022-07-19 21:18:28,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:28,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897909687] [2022-07-19 21:18:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:28,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897909687] [2022-07-19 21:18:28,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897909687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:28,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:28,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:28,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233530262] [2022-07-19 21:18:28,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:28,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:28,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:28,507 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 139 [2022-07-19 21:18:28,508 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 110 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,508 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:28,508 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 139 [2022-07-19 21:18:28,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:28,528 INFO L129 PetriNetUnfolder]: 0/136 cut-off events. [2022-07-19 21:18:28,532 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:18:28,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 136 events. 0/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 219 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-19 21:18:28,533 INFO L132 encePairwiseOnDemand]: 136/139 looper letters, 11 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2022-07-19 21:18:28,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 114 transitions, 264 flow [2022-07-19 21:18:28,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-07-19 21:18:28,535 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8465227817745803 [2022-07-19 21:18:28,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-07-19 21:18:28,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-07-19 21:18:28,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:28,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-07-19 21:18:28,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,539 INFO L186 Difference]: Start difference. First operand has 128 places, 110 transitions, 230 flow. Second operand 3 states and 353 transitions. [2022-07-19 21:18:28,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 114 transitions, 264 flow [2022-07-19 21:18:28,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 114 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:28,542 INFO L242 Difference]: Finished difference. Result has 119 places, 111 transitions, 242 flow [2022-07-19 21:18:28,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=119, PETRI_TRANSITIONS=111} [2022-07-19 21:18:28,543 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, -9 predicate places. [2022-07-19 21:18:28,544 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 242 flow [2022-07-19 21:18:28,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,544 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:28,544 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] [2022-07-19 21:18:28,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:18:28,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:28,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1922399296, now seen corresponding path program 1 times [2022-07-19 21:18:28,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:28,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083821823] [2022-07-19 21:18:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:28,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083821823] [2022-07-19 21:18:28,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083821823] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637783746] [2022-07-19 21:18:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:28,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:28,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:28,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:18:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:28,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:28,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637783746] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:28,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:28,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:28,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018488871] [2022-07-19 21:18:28,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:28,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:28,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:28,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:28,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:28,832 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 139 [2022-07-19 21:18:28,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 111 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:28,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 139 [2022-07-19 21:18:28,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:28,898 INFO L129 PetriNetUnfolder]: 0/110 cut-off events. [2022-07-19 21:18:28,898 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:18:28,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-19 21:18:28,899 INFO L132 encePairwiseOnDemand]: 134/139 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-07-19 21:18:28,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 258 flow [2022-07-19 21:18:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1026 transitions. [2022-07-19 21:18:28,901 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8201438848920863 [2022-07-19 21:18:28,901 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1026 transitions. [2022-07-19 21:18:28,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1026 transitions. [2022-07-19 21:18:28,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:28,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1026 transitions. [2022-07-19 21:18:28,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,907 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,907 INFO L186 Difference]: Start difference. First operand has 119 places, 111 transitions, 242 flow. Second operand 9 states and 1026 transitions. [2022-07-19 21:18:28,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 258 flow [2022-07-19 21:18:28,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:28,911 INFO L242 Difference]: Finished difference. Result has 113 places, 100 transitions, 230 flow [2022-07-19 21:18:28,911 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2022-07-19 21:18:28,914 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, -15 predicate places. [2022-07-19 21:18:28,914 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 230 flow [2022-07-19 21:18:28,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:28,916 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] [2022-07-19 21:18:28,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:18:29,133 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 [2022-07-19 21:18:29,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1177181810, now seen corresponding path program 1 times [2022-07-19 21:18:29,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322928787] [2022-07-19 21:18:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:29,161 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:29,183 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:29,183 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:29,183 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:29,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:29,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:18:29,184 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:18:29,184 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:29,184 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:18:29,222 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:29,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 157 places, 172 transitions, 365 flow [2022-07-19 21:18:29,246 INFO L129 PetriNetUnfolder]: 34/284 cut-off events. [2022-07-19 21:18:29,247 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:18:29,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 284 events. 34/284 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 864 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2022-07-19 21:18:29,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 172 transitions, 365 flow [2022-07-19 21:18:29,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 172 transitions, 365 flow [2022-07-19 21:18:29,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:29,252 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:29,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:29,257 INFO L129 PetriNetUnfolder]: 5/91 cut-off events. [2022-07-19 21:18:29,257 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:29,258 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,258 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:29,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash 277282342, now seen corresponding path program 1 times [2022-07-19 21:18:29,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507983131] [2022-07-19 21:18:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:29,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507983131] [2022-07-19 21:18:29,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507983131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:29,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:29,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:29,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133438464] [2022-07-19 21:18:29,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:29,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:29,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:29,277 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-07-19 21:18:29,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 172 transitions, 365 flow. Second operand has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:29,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-07-19 21:18:29,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:29,302 INFO L129 PetriNetUnfolder]: 0/246 cut-off events. [2022-07-19 21:18:29,302 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-19 21:18:29,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 246 events. 0/246 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 722 event pairs, 0 based on Foata normal form. 42/280 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-19 21:18:29,303 INFO L132 encePairwiseOnDemand]: 150/172 looper letters, 3 selfloop transitions, 0 changer transitions 12/149 dead transitions. [2022-07-19 21:18:29,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 149 transitions, 325 flow [2022-07-19 21:18:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 317 transitions. [2022-07-19 21:18:29,304 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9215116279069767 [2022-07-19 21:18:29,304 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 317 transitions. [2022-07-19 21:18:29,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 317 transitions. [2022-07-19 21:18:29,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:29,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 317 transitions. [2022-07-19 21:18:29,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,306 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,306 INFO L186 Difference]: Start difference. First operand has 157 places, 172 transitions, 365 flow. Second operand 2 states and 317 transitions. [2022-07-19 21:18:29,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 149 transitions, 325 flow [2022-07-19 21:18:29,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 149 transitions, 319 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:29,308 INFO L242 Difference]: Finished difference. Result has 157 places, 137 transitions, 289 flow [2022-07-19 21:18:29,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=289, PETRI_PLACES=157, PETRI_TRANSITIONS=137} [2022-07-19 21:18:29,309 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2022-07-19 21:18:29,309 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 137 transitions, 289 flow [2022-07-19 21:18:29,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,310 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,310 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:29,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:18:29,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,311 INFO L85 PathProgramCache]: Analyzing trace with hash -16120665, now seen corresponding path program 1 times [2022-07-19 21:18:29,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286620838] [2022-07-19 21:18:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:29,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286620838] [2022-07-19 21:18:29,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286620838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:29,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:29,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:29,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977962472] [2022-07-19 21:18:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:29,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:29,329 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 172 [2022-07-19 21:18:29,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 137 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:29,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 172 [2022-07-19 21:18:29,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:29,355 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2022-07-19 21:18:29,355 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:18:29,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 185 events. 0/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 402 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-19 21:18:29,356 INFO L132 encePairwiseOnDemand]: 169/172 looper letters, 12 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2022-07-19 21:18:29,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 141 transitions, 325 flow [2022-07-19 21:18:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2022-07-19 21:18:29,357 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8372093023255814 [2022-07-19 21:18:29,357 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2022-07-19 21:18:29,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2022-07-19 21:18:29,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:29,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2022-07-19 21:18:29,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,360 INFO L186 Difference]: Start difference. First operand has 157 places, 137 transitions, 289 flow. Second operand 3 states and 432 transitions. [2022-07-19 21:18:29,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 141 transitions, 325 flow [2022-07-19 21:18:29,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 141 transitions, 325 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:29,362 INFO L242 Difference]: Finished difference. Result has 148 places, 138 transitions, 301 flow [2022-07-19 21:18:29,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=148, PETRI_TRANSITIONS=138} [2022-07-19 21:18:29,363 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, -9 predicate places. [2022-07-19 21:18:29,363 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 138 transitions, 301 flow [2022-07-19 21:18:29,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,363 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,363 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] [2022-07-19 21:18:29,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:18:29,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1156559264, now seen corresponding path program 1 times [2022-07-19 21:18:29,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530589471] [2022-07-19 21:18:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530589471] [2022-07-19 21:18:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530589471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:29,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405514371] [2022-07-19 21:18:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:29,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:29,394 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:29,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:18:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405514371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:29,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:29,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:29,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993003523] [2022-07-19 21:18:29,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:29,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:29,521 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 172 [2022-07-19 21:18:29,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 138 transitions, 301 flow. Second operand has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:29,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 172 [2022-07-19 21:18:29,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:29,585 INFO L129 PetriNetUnfolder]: 0/159 cut-off events. [2022-07-19 21:18:29,585 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:18:29,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 159 events. 0/159 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 247 event pairs, 0 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-19 21:18:29,586 INFO L132 encePairwiseOnDemand]: 166/172 looper letters, 13 selfloop transitions, 9 changer transitions 0/148 dead transitions. [2022-07-19 21:18:29,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 148 transitions, 367 flow [2022-07-19 21:18:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1266 transitions. [2022-07-19 21:18:29,589 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8178294573643411 [2022-07-19 21:18:29,589 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1266 transitions. [2022-07-19 21:18:29,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1266 transitions. [2022-07-19 21:18:29,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:29,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1266 transitions. [2022-07-19 21:18:29,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,605 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,605 INFO L186 Difference]: Start difference. First operand has 148 places, 138 transitions, 301 flow. Second operand 9 states and 1266 transitions. [2022-07-19 21:18:29,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 148 transitions, 367 flow [2022-07-19 21:18:29,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 148 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:29,608 INFO L242 Difference]: Finished difference. Result has 158 places, 144 transitions, 349 flow [2022-07-19 21:18:29,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=349, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2022-07-19 21:18:29,609 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 1 predicate places. [2022-07-19 21:18:29,609 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 349 flow [2022-07-19 21:18:29,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,609 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] [2022-07-19 21:18:29,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:29,831 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 [2022-07-19 21:18:29,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1450639895, now seen corresponding path program 1 times [2022-07-19 21:18:29,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019494717] [2022-07-19 21:18:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:29,847 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:29,859 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:29,859 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:29,859 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:29,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:29,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:18:29,859 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:18:29,860 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:29,860 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:18:29,872 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:29,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 186 places, 205 transitions, 442 flow [2022-07-19 21:18:29,898 INFO L129 PetriNetUnfolder]: 44/356 cut-off events. [2022-07-19 21:18:29,898 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:18:29,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 356 events. 44/356 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1145 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 292. Up to 10 conditions per place. [2022-07-19 21:18:29,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 205 transitions, 442 flow [2022-07-19 21:18:29,903 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 205 transitions, 442 flow [2022-07-19 21:18:29,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:29,904 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:29,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:29,908 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2022-07-19 21:18:29,908 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:29,908 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,908 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:29,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,908 INFO L85 PathProgramCache]: Analyzing trace with hash 144638854, now seen corresponding path program 1 times [2022-07-19 21:18:29,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767138427] [2022-07-19 21:18:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767138427] [2022-07-19 21:18:29,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767138427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:29,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:29,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001545464] [2022-07-19 21:18:29,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:29,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:29,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:29,922 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 205 [2022-07-19 21:18:29,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:29,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 205 [2022-07-19 21:18:29,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:29,953 INFO L129 PetriNetUnfolder]: 0/307 cut-off events. [2022-07-19 21:18:29,953 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-19 21:18:29,953 INFO L84 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 307 events. 0/307 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 992 event pairs, 0 based on Foata normal form. 64/361 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2022-07-19 21:18:29,954 INFO L132 encePairwiseOnDemand]: 177/205 looper letters, 4 selfloop transitions, 0 changer transitions 12/176 dead transitions. [2022-07-19 21:18:29,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 392 flow [2022-07-19 21:18:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:29,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 376 transitions. [2022-07-19 21:18:29,956 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9170731707317074 [2022-07-19 21:18:29,956 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 376 transitions. [2022-07-19 21:18:29,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 376 transitions. [2022-07-19 21:18:29,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:29,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 376 transitions. [2022-07-19 21:18:29,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,958 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,958 INFO L186 Difference]: Start difference. First operand has 186 places, 205 transitions, 442 flow. Second operand 2 states and 376 transitions. [2022-07-19 21:18:29,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 392 flow [2022-07-19 21:18:29,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 176 transitions, 380 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:29,961 INFO L242 Difference]: Finished difference. Result has 186 places, 164 transitions, 348 flow [2022-07-19 21:18:29,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=348, PETRI_PLACES=186, PETRI_TRANSITIONS=164} [2022-07-19 21:18:29,961 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, 0 predicate places. [2022-07-19 21:18:29,962 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 164 transitions, 348 flow [2022-07-19 21:18:29,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,962 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,962 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:29,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:18:29,962 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,963 INFO L85 PathProgramCache]: Analyzing trace with hash -148764153, now seen corresponding path program 1 times [2022-07-19 21:18:29,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306520328] [2022-07-19 21:18:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:29,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306520328] [2022-07-19 21:18:29,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306520328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:29,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:29,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:29,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178767177] [2022-07-19 21:18:29,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:29,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:29,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:29,980 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 205 [2022-07-19 21:18:29,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 164 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:29,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 205 [2022-07-19 21:18:29,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:30,015 INFO L129 PetriNetUnfolder]: 0/234 cut-off events. [2022-07-19 21:18:30,016 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:18:30,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 234 events. 0/234 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 587 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-19 21:18:30,016 INFO L132 encePairwiseOnDemand]: 202/205 looper letters, 13 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-07-19 21:18:30,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 168 transitions, 386 flow [2022-07-19 21:18:30,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2022-07-19 21:18:30,018 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8308943089430895 [2022-07-19 21:18:30,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2022-07-19 21:18:30,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2022-07-19 21:18:30,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:30,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2022-07-19 21:18:30,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,021 INFO L186 Difference]: Start difference. First operand has 186 places, 164 transitions, 348 flow. Second operand 3 states and 511 transitions. [2022-07-19 21:18:30,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 168 transitions, 386 flow [2022-07-19 21:18:30,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 168 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:30,023 INFO L242 Difference]: Finished difference. Result has 177 places, 165 transitions, 360 flow [2022-07-19 21:18:30,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=177, PETRI_TRANSITIONS=165} [2022-07-19 21:18:30,024 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, -9 predicate places. [2022-07-19 21:18:30,024 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 165 transitions, 360 flow [2022-07-19 21:18:30,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,025 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,025 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] [2022-07-19 21:18:30,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:18:30,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash -965032960, now seen corresponding path program 1 times [2022-07-19 21:18:30,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:30,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699620027] [2022-07-19 21:18:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:30,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699620027] [2022-07-19 21:18:30,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699620027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:30,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180642341] [2022-07-19 21:18:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:30,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:30,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:30,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:18:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:30,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180642341] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:30,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:30,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:30,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411505366] [2022-07-19 21:18:30,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:30,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:30,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:30,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:30,199 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 205 [2022-07-19 21:18:30,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 165 transitions, 360 flow. Second operand has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:30,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 205 [2022-07-19 21:18:30,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:30,263 INFO L129 PetriNetUnfolder]: 0/208 cut-off events. [2022-07-19 21:18:30,263 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:18:30,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 208 events. 0/208 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 2/210 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-19 21:18:30,264 INFO L132 encePairwiseOnDemand]: 199/205 looper letters, 14 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2022-07-19 21:18:30,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 175 transitions, 428 flow [2022-07-19 21:18:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-07-19 21:18:30,267 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.813550135501355 [2022-07-19 21:18:30,267 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-07-19 21:18:30,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-07-19 21:18:30,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:30,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-07-19 21:18:30,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,273 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,273 INFO L186 Difference]: Start difference. First operand has 177 places, 165 transitions, 360 flow. Second operand 9 states and 1501 transitions. [2022-07-19 21:18:30,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 175 transitions, 428 flow [2022-07-19 21:18:30,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 175 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:30,275 INFO L242 Difference]: Finished difference. Result has 187 places, 171 transitions, 408 flow [2022-07-19 21:18:30,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=176, 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=408, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2022-07-19 21:18:30,276 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, 1 predicate places. [2022-07-19 21:18:30,276 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 408 flow [2022-07-19 21:18:30,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,277 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,277 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] [2022-07-19 21:18:30,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:30,493 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 [2022-07-19 21:18:30,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:30,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:30,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1583364555, now seen corresponding path program 1 times [2022-07-19 21:18:30,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:30,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297299026] [2022-07-19 21:18:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:30,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297299026] [2022-07-19 21:18:30,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297299026] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:30,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936807508] [2022-07-19 21:18:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:30,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:30,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:30,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:18:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936807508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:30,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:30,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:30,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960946965] [2022-07-19 21:18:30,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:30,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:30,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:30,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:30,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:30,742 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 205 [2022-07-19 21:18:30,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 408 flow. Second operand has 18 states, 18 states have (on average 166.61111111111111) internal successors, (2999), 18 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:30,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 205 [2022-07-19 21:18:30,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:30,833 INFO L129 PetriNetUnfolder]: 0/182 cut-off events. [2022-07-19 21:18:30,834 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-19 21:18:30,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 182 events. 0/182 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-19 21:18:30,834 INFO L132 encePairwiseOnDemand]: 200/205 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-07-19 21:18:30,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 470 flow [2022-07-19 21:18:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:18:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:18:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2490 transitions. [2022-07-19 21:18:30,839 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8097560975609757 [2022-07-19 21:18:30,839 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2490 transitions. [2022-07-19 21:18:30,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2490 transitions. [2022-07-19 21:18:30,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:30,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2490 transitions. [2022-07-19 21:18:30,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.0) internal successors, (2490), 15 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,863 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,863 INFO L186 Difference]: Start difference. First operand has 187 places, 171 transitions, 408 flow. Second operand 15 states and 2490 transitions. [2022-07-19 21:18:30,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 470 flow [2022-07-19 21:18:30,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-19 21:18:30,866 INFO L242 Difference]: Finished difference. Result has 184 places, 161 transitions, 402 flow [2022-07-19 21:18:30,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=402, PETRI_PLACES=184, PETRI_TRANSITIONS=161} [2022-07-19 21:18:30,866 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, -2 predicate places. [2022-07-19 21:18:30,867 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 402 flow [2022-07-19 21:18:30,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 166.61111111111111) internal successors, (2999), 18 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,868 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,868 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] [2022-07-19 21:18:30,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:31,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:18:31,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1301575835, now seen corresponding path program 1 times [2022-07-19 21:18:31,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954394002] [2022-07-19 21:18:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:31,096 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:31,111 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:31,111 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:31,111 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:31,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:31,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:18:31,112 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:31,112 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:31,112 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:18:31,126 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:31,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 215 places, 238 transitions, 521 flow [2022-07-19 21:18:31,161 INFO L129 PetriNetUnfolder]: 54/428 cut-off events. [2022-07-19 21:18:31,161 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:18:31,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 428 events. 54/428 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1420 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 369. Up to 12 conditions per place. [2022-07-19 21:18:31,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 238 transitions, 521 flow [2022-07-19 21:18:31,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 238 transitions, 521 flow [2022-07-19 21:18:31,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:31,169 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:31,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:31,173 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-19 21:18:31,173 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:31,173 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,173 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:31,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1457129031, now seen corresponding path program 1 times [2022-07-19 21:18:31,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82297031] [2022-07-19 21:18:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:31,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82297031] [2022-07-19 21:18:31,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82297031] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:31,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:31,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:31,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074261987] [2022-07-19 21:18:31,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:31,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:31,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:31,190 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 238 [2022-07-19 21:18:31,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:31,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 238 [2022-07-19 21:18:31,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:31,240 INFO L129 PetriNetUnfolder]: 0/343 cut-off events. [2022-07-19 21:18:31,241 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:18:31,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 343 events. 0/343 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1139 event pairs, 0 based on Foata normal form. 379/712 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-19 21:18:31,241 INFO L132 encePairwiseOnDemand]: 201/238 looper letters, 14 selfloop transitions, 2 changer transitions 12/207 dead transitions. [2022-07-19 21:18:31,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 207 transitions, 491 flow [2022-07-19 21:18:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-07-19 21:18:31,243 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8837535014005602 [2022-07-19 21:18:31,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-07-19 21:18:31,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-07-19 21:18:31,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:31,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-07-19 21:18:31,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,246 INFO L186 Difference]: Start difference. First operand has 215 places, 238 transitions, 521 flow. Second operand 3 states and 631 transitions. [2022-07-19 21:18:31,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 207 transitions, 491 flow [2022-07-19 21:18:31,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 207 transitions, 471 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:31,249 INFO L242 Difference]: Finished difference. Result has 217 places, 192 transitions, 419 flow [2022-07-19 21:18:31,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=217, PETRI_TRANSITIONS=192} [2022-07-19 21:18:31,250 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 2 predicate places. [2022-07-19 21:18:31,250 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 192 transitions, 419 flow [2022-07-19 21:18:31,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,250 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,251 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] [2022-07-19 21:18:31,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:18:31,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1797989088, now seen corresponding path program 1 times [2022-07-19 21:18:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9975172] [2022-07-19 21:18:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:31,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9975172] [2022-07-19 21:18:31,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9975172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:31,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179792448] [2022-07-19 21:18:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:31,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:31,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:31,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:18:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:31,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179792448] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:31,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:31,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:31,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032952960] [2022-07-19 21:18:31,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:31,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:31,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:31,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:31,413 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 238 [2022-07-19 21:18:31,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 192 transitions, 419 flow. Second operand has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:31,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 238 [2022-07-19 21:18:31,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:31,505 INFO L129 PetriNetUnfolder]: 0/257 cut-off events. [2022-07-19 21:18:31,506 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:18:31,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 257 events. 0/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 613 event pairs, 0 based on Foata normal form. 2/259 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-19 21:18:31,506 INFO L132 encePairwiseOnDemand]: 232/238 looper letters, 15 selfloop transitions, 9 changer transitions 0/202 dead transitions. [2022-07-19 21:18:31,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 202 transitions, 489 flow [2022-07-19 21:18:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1736 transitions. [2022-07-19 21:18:31,511 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8104575163398693 [2022-07-19 21:18:31,511 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1736 transitions. [2022-07-19 21:18:31,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1736 transitions. [2022-07-19 21:18:31,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:31,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1736 transitions. [2022-07-19 21:18:31,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.88888888888889) internal successors, (1736), 9 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,517 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,518 INFO L186 Difference]: Start difference. First operand has 217 places, 192 transitions, 419 flow. Second operand 9 states and 1736 transitions. [2022-07-19 21:18:31,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 202 transitions, 489 flow [2022-07-19 21:18:31,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 202 transitions, 487 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:31,521 INFO L242 Difference]: Finished difference. Result has 215 places, 198 transitions, 467 flow [2022-07-19 21:18:31,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=467, PETRI_PLACES=215, PETRI_TRANSITIONS=198} [2022-07-19 21:18:31,521 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 0 predicate places. [2022-07-19 21:18:31,522 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 198 transitions, 467 flow [2022-07-19 21:18:31,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,523 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,523 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] [2022-07-19 21:18:31,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:31,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:18:31,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1377325333, now seen corresponding path program 1 times [2022-07-19 21:18:31,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816283771] [2022-07-19 21:18:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:31,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816283771] [2022-07-19 21:18:31,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816283771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:31,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613366921] [2022-07-19 21:18:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:31,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:31,789 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:31,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:18:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:31,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613366921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:31,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:31,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:31,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823511663] [2022-07-19 21:18:31,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:31,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:31,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:31,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:31,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:31,987 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 238 [2022-07-19 21:18:31,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 198 transitions, 467 flow. Second operand has 18 states, 18 states have (on average 192.61111111111111) internal successors, (3467), 18 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:31,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 238 [2022-07-19 21:18:31,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:32,108 INFO L129 PetriNetUnfolder]: 0/218 cut-off events. [2022-07-19 21:18:32,109 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-19 21:18:32,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 218 events. 0/218 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-19 21:18:32,109 INFO L132 encePairwiseOnDemand]: 233/238 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-07-19 21:18:32,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 200 transitions, 565 flow [2022-07-19 21:18:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:18:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:18:32,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3457 transitions. [2022-07-19 21:18:32,115 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8069561157796452 [2022-07-19 21:18:32,115 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3457 transitions. [2022-07-19 21:18:32,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3457 transitions. [2022-07-19 21:18:32,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:32,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3457 transitions. [2022-07-19 21:18:32,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 192.05555555555554) internal successors, (3457), 18 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,125 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,125 INFO L186 Difference]: Start difference. First operand has 215 places, 198 transitions, 467 flow. Second operand 18 states and 3457 transitions. [2022-07-19 21:18:32,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 200 transitions, 565 flow [2022-07-19 21:18:32,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-19 21:18:32,128 INFO L242 Difference]: Finished difference. Result has 215 places, 191 transitions, 480 flow [2022-07-19 21:18:32,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=215, PETRI_TRANSITIONS=191} [2022-07-19 21:18:32,129 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 0 predicate places. [2022-07-19 21:18:32,129 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 191 transitions, 480 flow [2022-07-19 21:18:32,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 192.61111111111111) internal successors, (3467), 18 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,130 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:32,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:32,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:32,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash -544530782, now seen corresponding path program 1 times [2022-07-19 21:18:32,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:32,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126070504] [2022-07-19 21:18:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:32,372 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:32,384 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:32,384 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:32,384 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:32,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:32,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:18:32,384 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:18:32,385 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:32,385 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 21:18:32,399 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:32,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 244 places, 271 transitions, 602 flow [2022-07-19 21:18:32,442 INFO L129 PetriNetUnfolder]: 64/500 cut-off events. [2022-07-19 21:18:32,443 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-19 21:18:32,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 500 events. 64/500 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1726 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 447. Up to 14 conditions per place. [2022-07-19 21:18:32,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 271 transitions, 602 flow [2022-07-19 21:18:32,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 271 transitions, 602 flow [2022-07-19 21:18:32,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:32,452 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:32,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:32,456 INFO L129 PetriNetUnfolder]: 5/94 cut-off events. [2022-07-19 21:18:32,456 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:32,456 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,456 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:32,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash 506591591, now seen corresponding path program 1 times [2022-07-19 21:18:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:32,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278153064] [2022-07-19 21:18:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:32,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278153064] [2022-07-19 21:18:32,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278153064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:32,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:32,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:32,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749767906] [2022-07-19 21:18:32,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:32,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:32,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:32,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:32,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:32,471 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 271 [2022-07-19 21:18:32,471 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 271 transitions, 602 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:32,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 271 [2022-07-19 21:18:32,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:32,530 INFO L129 PetriNetUnfolder]: 0/404 cut-off events. [2022-07-19 21:18:32,530 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-19 21:18:32,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 404 events. 0/404 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1410 event pairs, 0 based on Foata normal form. 558/950 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-19 21:18:32,531 INFO L132 encePairwiseOnDemand]: 228/271 looper letters, 15 selfloop transitions, 2 changer transitions 12/234 dead transitions. [2022-07-19 21:18:32,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 234 transitions, 562 flow [2022-07-19 21:18:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2022-07-19 21:18:32,532 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8806888068880688 [2022-07-19 21:18:32,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2022-07-19 21:18:32,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2022-07-19 21:18:32,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:32,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2022-07-19 21:18:32,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,535 INFO L186 Difference]: Start difference. First operand has 244 places, 271 transitions, 602 flow. Second operand 3 states and 716 transitions. [2022-07-19 21:18:32,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 234 transitions, 562 flow [2022-07-19 21:18:32,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 234 transitions, 532 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:32,538 INFO L242 Difference]: Finished difference. Result has 246 places, 219 transitions, 478 flow [2022-07-19 21:18:32,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=478, PETRI_PLACES=246, PETRI_TRANSITIONS=219} [2022-07-19 21:18:32,539 INFO L279 CegarLoopForPetriNet]: 244 programPoint places, 2 predicate places. [2022-07-19 21:18:32,539 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 219 transitions, 478 flow [2022-07-19 21:18:32,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,539 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,539 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] [2022-07-19 21:18:32,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 21:18:32,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash 639539648, now seen corresponding path program 1 times [2022-07-19 21:18:32,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:32,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111767468] [2022-07-19 21:18:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:32,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111767468] [2022-07-19 21:18:32,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111767468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:32,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516549823] [2022-07-19 21:18:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:32,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:32,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:32,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:18:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:32,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516549823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:32,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:32,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:32,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65488173] [2022-07-19 21:18:32,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:32,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:32,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:32,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:32,688 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 271 [2022-07-19 21:18:32,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 219 transitions, 478 flow. Second operand has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:32,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 271 [2022-07-19 21:18:32,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:32,784 INFO L129 PetriNetUnfolder]: 0/306 cut-off events. [2022-07-19 21:18:32,785 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:18:32,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 306 events. 0/306 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 798 event pairs, 0 based on Foata normal form. 2/308 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-19 21:18:32,785 INFO L132 encePairwiseOnDemand]: 265/271 looper letters, 16 selfloop transitions, 9 changer transitions 0/229 dead transitions. [2022-07-19 21:18:32,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 229 transitions, 550 flow [2022-07-19 21:18:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1971 transitions. [2022-07-19 21:18:32,789 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8081180811808119 [2022-07-19 21:18:32,789 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1971 transitions. [2022-07-19 21:18:32,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1971 transitions. [2022-07-19 21:18:32,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:32,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1971 transitions. [2022-07-19 21:18:32,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 271.0) internal successors, (2710), 10 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,795 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 271.0) internal successors, (2710), 10 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,795 INFO L186 Difference]: Start difference. First operand has 246 places, 219 transitions, 478 flow. Second operand 9 states and 1971 transitions. [2022-07-19 21:18:32,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 229 transitions, 550 flow [2022-07-19 21:18:32,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 229 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:32,798 INFO L242 Difference]: Finished difference. Result has 244 places, 225 transitions, 526 flow [2022-07-19 21:18:32,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=526, PETRI_PLACES=244, PETRI_TRANSITIONS=225} [2022-07-19 21:18:32,798 INFO L279 CegarLoopForPetriNet]: 244 programPoint places, 0 predicate places. [2022-07-19 21:18:32,798 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 225 transitions, 526 flow [2022-07-19 21:18:32,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,799 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,799 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] [2022-07-19 21:18:32,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:33,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:33,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2089549643, now seen corresponding path program 1 times [2022-07-19 21:18:33,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:33,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253677605] [2022-07-19 21:18:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:33,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253677605] [2022-07-19 21:18:33,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253677605] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:33,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404096373] [2022-07-19 21:18:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:33,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:33,109 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:33,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:18:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404096373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:33,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:33,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:33,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413269430] [2022-07-19 21:18:33,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:33,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:33,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:33,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:33,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:33,388 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 271 [2022-07-19 21:18:33,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 225 transitions, 526 flow. Second operand has 18 states, 18 states have (on average 218.61111111111111) internal successors, (3935), 18 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:33,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 271 [2022-07-19 21:18:33,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:33,544 INFO L129 PetriNetUnfolder]: 0/254 cut-off events. [2022-07-19 21:18:33,545 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:18:33,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 254 events. 0/254 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-19 21:18:33,545 INFO L132 encePairwiseOnDemand]: 266/271 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-07-19 21:18:33,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 232 transitions, 660 flow [2022-07-19 21:18:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:33,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4580 transitions. [2022-07-19 21:18:33,550 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8047794763661922 [2022-07-19 21:18:33,550 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4580 transitions. [2022-07-19 21:18:33,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4580 transitions. [2022-07-19 21:18:33,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:33,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4580 transitions. [2022-07-19 21:18:33,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 218.0952380952381) internal successors, (4580), 21 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,562 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,562 INFO L186 Difference]: Start difference. First operand has 244 places, 225 transitions, 526 flow. Second operand 21 states and 4580 transitions. [2022-07-19 21:18:33,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 232 transitions, 660 flow [2022-07-19 21:18:33,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-19 21:18:33,566 INFO L242 Difference]: Finished difference. Result has 247 places, 221 transitions, 558 flow [2022-07-19 21:18:33,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=247, PETRI_TRANSITIONS=221} [2022-07-19 21:18:33,566 INFO L279 CegarLoopForPetriNet]: 244 programPoint places, 3 predicate places. [2022-07-19 21:18:33,567 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 221 transitions, 558 flow [2022-07-19 21:18:33,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 218.61111111111111) internal successors, (3935), 18 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,567 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:33,568 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:33,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:18:33,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 21:18:33,782 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:33,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:33,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1513194560, now seen corresponding path program 1 times [2022-07-19 21:18:33,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:33,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712102326] [2022-07-19 21:18:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:33,835 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:33,866 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:33,866 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:33,866 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:33,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:33,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 21:18:33,866 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:18:33,867 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:33,867 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-19 21:18:33,882 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:33,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 273 places, 304 transitions, 685 flow [2022-07-19 21:18:33,937 INFO L129 PetriNetUnfolder]: 74/572 cut-off events. [2022-07-19 21:18:33,937 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-19 21:18:33,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 572 events. 74/572 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2005 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 526. Up to 16 conditions per place. [2022-07-19 21:18:33,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 304 transitions, 685 flow [2022-07-19 21:18:33,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 304 transitions, 685 flow [2022-07-19 21:18:33,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:33,951 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:33,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:33,954 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2022-07-19 21:18:33,954 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:33,955 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:33,955 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:33,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1294590823, now seen corresponding path program 1 times [2022-07-19 21:18:33,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:33,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085063054] [2022-07-19 21:18:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:33,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085063054] [2022-07-19 21:18:33,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085063054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:33,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:33,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:33,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362547778] [2022-07-19 21:18:33,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:33,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:33,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:33,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:33,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:33,969 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 304 [2022-07-19 21:18:33,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 304 transitions, 685 flow. Second operand has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:33,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 304 [2022-07-19 21:18:33,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:34,042 INFO L129 PetriNetUnfolder]: 0/465 cut-off events. [2022-07-19 21:18:34,042 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-19 21:18:34,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 465 events. 0/465 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1687 event pairs, 0 based on Foata normal form. 773/1224 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-19 21:18:34,043 INFO L132 encePairwiseOnDemand]: 255/304 looper letters, 16 selfloop transitions, 2 changer transitions 12/261 dead transitions. [2022-07-19 21:18:34,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 261 transitions, 635 flow [2022-07-19 21:18:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 801 transitions. [2022-07-19 21:18:34,045 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8782894736842105 [2022-07-19 21:18:34,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 801 transitions. [2022-07-19 21:18:34,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 801 transitions. [2022-07-19 21:18:34,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:34,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 801 transitions. [2022-07-19 21:18:34,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,047 INFO L186 Difference]: Start difference. First operand has 273 places, 304 transitions, 685 flow. Second operand 3 states and 801 transitions. [2022-07-19 21:18:34,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 261 transitions, 635 flow [2022-07-19 21:18:34,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 261 transitions, 593 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:34,080 INFO L242 Difference]: Finished difference. Result has 275 places, 246 transitions, 537 flow [2022-07-19 21:18:34,080 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=537, PETRI_PLACES=275, PETRI_TRANSITIONS=246} [2022-07-19 21:18:34,081 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 2 predicate places. [2022-07-19 21:18:34,081 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 246 transitions, 537 flow [2022-07-19 21:18:34,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,081 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:34,081 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] [2022-07-19 21:18:34,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 21:18:34,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2052585952, now seen corresponding path program 1 times [2022-07-19 21:18:34,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:34,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293674177] [2022-07-19 21:18:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:34,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:34,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:34,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293674177] [2022-07-19 21:18:34,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293674177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:34,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28807433] [2022-07-19 21:18:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:34,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:34,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:34,106 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:34,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:18:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:34,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:34,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:34,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:34,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28807433] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:34,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:34,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:34,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078806694] [2022-07-19 21:18:34,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:34,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:34,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:34,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:34,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:34,253 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 304 [2022-07-19 21:18:34,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 246 transitions, 537 flow. Second operand has 10 states, 10 states have (on average 244.3) internal successors, (2443), 10 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:34,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 304 [2022-07-19 21:18:34,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:34,351 INFO L129 PetriNetUnfolder]: 0/355 cut-off events. [2022-07-19 21:18:34,351 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-19 21:18:34,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 355 events. 0/355 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 979 event pairs, 0 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-19 21:18:34,352 INFO L132 encePairwiseOnDemand]: 298/304 looper letters, 17 selfloop transitions, 9 changer transitions 0/256 dead transitions. [2022-07-19 21:18:34,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 256 transitions, 611 flow [2022-07-19 21:18:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2206 transitions. [2022-07-19 21:18:34,355 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8062865497076024 [2022-07-19 21:18:34,355 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2206 transitions. [2022-07-19 21:18:34,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2206 transitions. [2022-07-19 21:18:34,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:34,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2206 transitions. [2022-07-19 21:18:34,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 245.11111111111111) internal successors, (2206), 9 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,359 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,359 INFO L186 Difference]: Start difference. First operand has 275 places, 246 transitions, 537 flow. Second operand 9 states and 2206 transitions. [2022-07-19 21:18:34,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 256 transitions, 611 flow [2022-07-19 21:18:34,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 256 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:34,363 INFO L242 Difference]: Finished difference. Result has 273 places, 252 transitions, 585 flow [2022-07-19 21:18:34,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=585, PETRI_PLACES=273, PETRI_TRANSITIONS=252} [2022-07-19 21:18:34,363 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 0 predicate places. [2022-07-19 21:18:34,363 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 252 transitions, 585 flow [2022-07-19 21:18:34,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 244.3) internal successors, (2443), 10 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:34,364 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] [2022-07-19 21:18:34,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:34,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 21:18:34,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash 900912405, now seen corresponding path program 1 times [2022-07-19 21:18:34,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:34,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135410885] [2022-07-19 21:18:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:34,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:34,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135410885] [2022-07-19 21:18:34,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135410885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:34,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232795492] [2022-07-19 21:18:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:34,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:34,648 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:34,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:18:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:34,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:34,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232795492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:34,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:34,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:34,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702969589] [2022-07-19 21:18:34,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:34,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:34,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:34,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:34,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:34,967 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 304 [2022-07-19 21:18:34,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 252 transitions, 585 flow. Second operand has 18 states, 18 states have (on average 244.61111111111111) internal successors, (4403), 18 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:34,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 304 [2022-07-19 21:18:34,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:35,181 INFO L129 PetriNetUnfolder]: 0/303 cut-off events. [2022-07-19 21:18:35,181 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-19 21:18:35,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 303 events. 0/303 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 639 event pairs, 0 based on Foata normal form. 4/307 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-19 21:18:35,182 INFO L132 encePairwiseOnDemand]: 298/304 looper letters, 25 selfloop transitions, 21 changer transitions 0/276 dead transitions. [2022-07-19 21:18:35,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 276 transitions, 785 flow [2022-07-19 21:18:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5132 transitions. [2022-07-19 21:18:35,187 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8038847117794486 [2022-07-19 21:18:35,188 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5132 transitions. [2022-07-19 21:18:35,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5132 transitions. [2022-07-19 21:18:35,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:35,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5132 transitions. [2022-07-19 21:18:35,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 244.38095238095238) internal successors, (5132), 21 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 304.0) internal successors, (6688), 22 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,202 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 304.0) internal successors, (6688), 22 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,202 INFO L186 Difference]: Start difference. First operand has 273 places, 252 transitions, 585 flow. Second operand 21 states and 5132 transitions. [2022-07-19 21:18:35,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 276 transitions, 785 flow [2022-07-19 21:18:35,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 276 transitions, 771 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:35,207 INFO L242 Difference]: Finished difference. Result has 297 places, 265 transitions, 709 flow [2022-07-19 21:18:35,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=709, PETRI_PLACES=297, PETRI_TRANSITIONS=265} [2022-07-19 21:18:35,208 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 24 predicate places. [2022-07-19 21:18:35,208 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 265 transitions, 709 flow [2022-07-19 21:18:35,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 244.61111111111111) internal successors, (4403), 18 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,209 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:35,209 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:35,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:35,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 21:18:35,445 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1779148577, now seen corresponding path program 1 times [2022-07-19 21:18:35,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:35,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969194657] [2022-07-19 21:18:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:35,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:35,464 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:35,483 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:35,484 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:35,484 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:35,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:35,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 21:18:35,484 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:18:35,485 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:35,485 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-19 21:18:35,517 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:35,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 302 places, 337 transitions, 770 flow [2022-07-19 21:18:35,590 INFO L129 PetriNetUnfolder]: 84/644 cut-off events. [2022-07-19 21:18:35,591 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-19 21:18:35,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 644 events. 84/644 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2266 event pairs, 0 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 606. Up to 18 conditions per place. [2022-07-19 21:18:35,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 337 transitions, 770 flow [2022-07-19 21:18:35,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 337 transitions, 770 flow [2022-07-19 21:18:35,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:35,611 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:35,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:35,615 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2022-07-19 21:18:35,615 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:35,615 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:35,615 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:35,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash -180437562, now seen corresponding path program 1 times [2022-07-19 21:18:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:35,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005681391] [2022-07-19 21:18:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:35,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:35,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005681391] [2022-07-19 21:18:35,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005681391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:35,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:35,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:35,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588216602] [2022-07-19 21:18:35,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:35,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:35,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:35,628 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 337 [2022-07-19 21:18:35,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 337 transitions, 770 flow. Second operand has 2 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:35,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 337 [2022-07-19 21:18:35,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:35,716 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2022-07-19 21:18:35,717 INFO L130 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2022-07-19 21:18:35,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 551 events. 0/551 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2092 event pairs, 0 based on Foata normal form. 212/745 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-19 21:18:35,718 INFO L132 encePairwiseOnDemand]: 285/337 looper letters, 8 selfloop transitions, 0 changer transitions 12/284 dead transitions. [2022-07-19 21:18:35,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 284 transitions, 680 flow [2022-07-19 21:18:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 612 transitions. [2022-07-19 21:18:35,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9080118694362018 [2022-07-19 21:18:35,720 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 612 transitions. [2022-07-19 21:18:35,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 612 transitions. [2022-07-19 21:18:35,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:35,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 612 transitions. [2022-07-19 21:18:35,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 306.0) internal successors, (612), 2 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,722 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,722 INFO L186 Difference]: Start difference. First operand has 302 places, 337 transitions, 770 flow. Second operand 2 states and 612 transitions. [2022-07-19 21:18:35,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 284 transitions, 680 flow [2022-07-19 21:18:35,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 284 transitions, 624 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:35,726 INFO L242 Difference]: Finished difference. Result has 302 places, 272 transitions, 584 flow [2022-07-19 21:18:35,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=584, PETRI_PLACES=302, PETRI_TRANSITIONS=272} [2022-07-19 21:18:35,726 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 0 predicate places. [2022-07-19 21:18:35,726 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 272 transitions, 584 flow [2022-07-19 21:18:35,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,727 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:35,727 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:35,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-19 21:18:35,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:35,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:35,728 INFO L85 PathProgramCache]: Analyzing trace with hash -473840569, now seen corresponding path program 1 times [2022-07-19 21:18:35,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:35,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175592764] [2022-07-19 21:18:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:35,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:35,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:35,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175592764] [2022-07-19 21:18:35,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175592764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:35,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:35,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:35,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859751385] [2022-07-19 21:18:35,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:35,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:35,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:35,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:35,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:35,747 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 337 [2022-07-19 21:18:35,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 272 transitions, 584 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:35,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 337 [2022-07-19 21:18:35,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:35,818 INFO L129 PetriNetUnfolder]: 0/430 cut-off events. [2022-07-19 21:18:35,819 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:18:35,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 430 events. 0/430 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1318 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-19 21:18:35,820 INFO L132 encePairwiseOnDemand]: 334/337 looper letters, 17 selfloop transitions, 2 changer transitions 0/276 dead transitions. [2022-07-19 21:18:35,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 276 transitions, 630 flow [2022-07-19 21:18:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2022-07-19 21:18:35,821 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8180019782393669 [2022-07-19 21:18:35,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2022-07-19 21:18:35,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2022-07-19 21:18:35,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:35,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2022-07-19 21:18:35,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,824 INFO L186 Difference]: Start difference. First operand has 302 places, 272 transitions, 584 flow. Second operand 3 states and 827 transitions. [2022-07-19 21:18:35,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 276 transitions, 630 flow [2022-07-19 21:18:35,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 276 transitions, 630 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:35,828 INFO L242 Difference]: Finished difference. Result has 293 places, 273 transitions, 596 flow [2022-07-19 21:18:35,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=596, PETRI_PLACES=293, PETRI_TRANSITIONS=273} [2022-07-19 21:18:35,830 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, -9 predicate places. [2022-07-19 21:18:35,830 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 273 transitions, 596 flow [2022-07-19 21:18:35,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,830 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:35,830 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] [2022-07-19 21:18:35,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-19 21:18:35,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:35,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1853817472, now seen corresponding path program 1 times [2022-07-19 21:18:35,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:35,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045987084] [2022-07-19 21:18:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:35,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:35,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:35,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045987084] [2022-07-19 21:18:35,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045987084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:35,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405324295] [2022-07-19 21:18:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:35,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:35,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:35,872 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:35,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:18:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:35,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:36,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405324295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:36,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:36,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087531262] [2022-07-19 21:18:36,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:36,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:36,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:36,027 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-07-19 21:18:36,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 273 transitions, 596 flow. Second operand has 10 states, 10 states have (on average 270.3) internal successors, (2703), 10 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:36,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-07-19 21:18:36,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:36,193 INFO L129 PetriNetUnfolder]: 0/404 cut-off events. [2022-07-19 21:18:36,193 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:18:36,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 404 events. 0/404 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1169 event pairs, 0 based on Foata normal form. 2/406 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-19 21:18:36,194 INFO L132 encePairwiseOnDemand]: 331/337 looper letters, 18 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2022-07-19 21:18:36,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 283 transitions, 672 flow [2022-07-19 21:18:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2441 transitions. [2022-07-19 21:18:36,199 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8048137157929443 [2022-07-19 21:18:36,199 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2441 transitions. [2022-07-19 21:18:36,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2441 transitions. [2022-07-19 21:18:36,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:36,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2441 transitions. [2022-07-19 21:18:36,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.22222222222223) internal successors, (2441), 9 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,220 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,220 INFO L186 Difference]: Start difference. First operand has 293 places, 273 transitions, 596 flow. Second operand 9 states and 2441 transitions. [2022-07-19 21:18:36,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 283 transitions, 672 flow [2022-07-19 21:18:36,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 283 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:36,224 INFO L242 Difference]: Finished difference. Result has 303 places, 279 transitions, 644 flow [2022-07-19 21:18:36,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=644, PETRI_PLACES=303, PETRI_TRANSITIONS=279} [2022-07-19 21:18:36,225 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 1 predicate places. [2022-07-19 21:18:36,225 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 279 transitions, 644 flow [2022-07-19 21:18:36,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 270.3) internal successors, (2703), 10 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,226 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:36,226 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] [2022-07-19 21:18:36,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:36,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-19 21:18:36,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1758776885, now seen corresponding path program 1 times [2022-07-19 21:18:36,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:36,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583835036] [2022-07-19 21:18:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:36,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:36,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:36,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583835036] [2022-07-19 21:18:36,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583835036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:36,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854984439] [2022-07-19 21:18:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:36,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:36,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:36,512 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:36,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:18:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:36,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:36,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:36,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:36,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854984439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:36,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:36,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:36,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462854765] [2022-07-19 21:18:36,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:36,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:36,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:36,768 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-07-19 21:18:36,770 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 279 transitions, 644 flow. Second operand has 18 states, 18 states have (on average 270.6111111111111) internal successors, (4871), 18 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:36,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-07-19 21:18:36,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:37,004 INFO L129 PetriNetUnfolder]: 0/352 cut-off events. [2022-07-19 21:18:37,004 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-19 21:18:37,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 352 events. 0/352 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 822 event pairs, 0 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-19 21:18:37,005 INFO L132 encePairwiseOnDemand]: 331/337 looper letters, 26 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2022-07-19 21:18:37,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 303 transitions, 846 flow [2022-07-19 21:18:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5679 transitions. [2022-07-19 21:18:37,019 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8024586689275116 [2022-07-19 21:18:37,019 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5679 transitions. [2022-07-19 21:18:37,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5679 transitions. [2022-07-19 21:18:37,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:37,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5679 transitions. [2022-07-19 21:18:37,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 270.42857142857144) internal successors, (5679), 21 states have internal predecessors, (5679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:37,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:37,030 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:37,030 INFO L186 Difference]: Start difference. First operand has 303 places, 279 transitions, 644 flow. Second operand 21 states and 5679 transitions. [2022-07-19 21:18:37,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 303 transitions, 846 flow [2022-07-19 21:18:37,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 303 transitions, 832 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:37,034 INFO L242 Difference]: Finished difference. Result has 327 places, 292 transitions, 768 flow [2022-07-19 21:18:37,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=768, PETRI_PLACES=327, PETRI_TRANSITIONS=292} [2022-07-19 21:18:37,036 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 25 predicate places. [2022-07-19 21:18:37,036 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 292 transitions, 768 flow [2022-07-19 21:18:37,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 270.6111111111111) internal successors, (4871), 18 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:37,037 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:37,037 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:37,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:37,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-19 21:18:37,255 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1304864171, now seen corresponding path program 1 times [2022-07-19 21:18:37,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:37,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423814044] [2022-07-19 21:18:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:37,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:37,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:37,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423814044] [2022-07-19 21:18:37,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423814044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:37,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283359991] [2022-07-19 21:18:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:37,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:37,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:37,440 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:37,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:18:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:37,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:37,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:37,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283359991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:37,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:37,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:37,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947899210] [2022-07-19 21:18:37,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:37,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:37,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:37,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:37,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:37,910 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-07-19 21:18:37,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 292 transitions, 768 flow. Second operand has 34 states, 34 states have (on average 270.79411764705884) internal successors, (9207), 34 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:37,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:37,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-07-19 21:18:37,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:38,253 INFO L129 PetriNetUnfolder]: 0/326 cut-off events. [2022-07-19 21:18:38,253 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-19 21:18:38,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 326 events. 0/326 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-19 21:18:38,254 INFO L132 encePairwiseOnDemand]: 332/337 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-07-19 21:18:38,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 296 transitions, 912 flow [2022-07-19 21:18:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 21:18:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-19 21:18:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7290 transitions. [2022-07-19 21:18:38,258 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8011869436201781 [2022-07-19 21:18:38,258 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7290 transitions. [2022-07-19 21:18:38,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7290 transitions. [2022-07-19 21:18:38,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:38,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7290 transitions. [2022-07-19 21:18:38,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 270.0) internal successors, (7290), 27 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 337.0) internal successors, (9436), 28 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,273 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 337.0) internal successors, (9436), 28 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,273 INFO L186 Difference]: Start difference. First operand has 327 places, 292 transitions, 768 flow. Second operand 27 states and 7290 transitions. [2022-07-19 21:18:38,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 296 transitions, 912 flow [2022-07-19 21:18:38,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:38,278 INFO L242 Difference]: Finished difference. Result has 327 places, 282 transitions, 751 flow [2022-07-19 21:18:38,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=751, PETRI_PLACES=327, PETRI_TRANSITIONS=282} [2022-07-19 21:18:38,278 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 25 predicate places. [2022-07-19 21:18:38,278 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 282 transitions, 751 flow [2022-07-19 21:18:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 270.79411764705884) internal successors, (9207), 34 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,280 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:38,280 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:38,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:38,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-19 21:18:38,493 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1236984545, now seen corresponding path program 1 times [2022-07-19 21:18:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:38,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125618395] [2022-07-19 21:18:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:38,516 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:38,559 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:38,575 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:38,575 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:38,576 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:38,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-19 21:18:38,576 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:18:38,576 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:38,576 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-19 21:18:38,597 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:38,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 331 places, 370 transitions, 857 flow [2022-07-19 21:18:38,723 INFO L129 PetriNetUnfolder]: 94/716 cut-off events. [2022-07-19 21:18:38,723 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-19 21:18:38,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 716 events. 94/716 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2535 event pairs, 0 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 687. Up to 20 conditions per place. [2022-07-19 21:18:38,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 370 transitions, 857 flow [2022-07-19 21:18:38,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 370 transitions, 857 flow [2022-07-19 21:18:38,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:38,749 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:38,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:38,753 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2022-07-19 21:18:38,754 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:38,754 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:38,754 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:38,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash -210332282, now seen corresponding path program 1 times [2022-07-19 21:18:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:38,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402260389] [2022-07-19 21:18:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:38,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:38,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402260389] [2022-07-19 21:18:38,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402260389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:38,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:38,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:38,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108826998] [2022-07-19 21:18:38,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:38,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:38,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:38,767 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 370 [2022-07-19 21:18:38,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 370 transitions, 857 flow. Second operand has 2 states, 2 states have (on average 302.5) internal successors, (605), 2 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:38,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 370 [2022-07-19 21:18:38,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:38,875 INFO L129 PetriNetUnfolder]: 0/612 cut-off events. [2022-07-19 21:18:38,876 INFO L130 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2022-07-19 21:18:38,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 612 events. 0/612 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2366 event pairs, 0 based on Foata normal form. 264/856 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2022-07-19 21:18:38,877 INFO L132 encePairwiseOnDemand]: 312/370 looper letters, 9 selfloop transitions, 0 changer transitions 12/311 dead transitions. [2022-07-19 21:18:38,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 311 transitions, 757 flow [2022-07-19 21:18:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 671 transitions. [2022-07-19 21:18:38,879 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9067567567567567 [2022-07-19 21:18:38,879 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 671 transitions. [2022-07-19 21:18:38,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 671 transitions. [2022-07-19 21:18:38,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:38,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 671 transitions. [2022-07-19 21:18:38,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 335.5) internal successors, (671), 2 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,881 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,881 INFO L186 Difference]: Start difference. First operand has 331 places, 370 transitions, 857 flow. Second operand 2 states and 671 transitions. [2022-07-19 21:18:38,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 311 transitions, 757 flow [2022-07-19 21:18:38,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 311 transitions, 685 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:38,886 INFO L242 Difference]: Finished difference. Result has 331 places, 299 transitions, 643 flow [2022-07-19 21:18:38,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=643, PETRI_PLACES=331, PETRI_TRANSITIONS=299} [2022-07-19 21:18:38,886 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 0 predicate places. [2022-07-19 21:18:38,886 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 299 transitions, 643 flow [2022-07-19 21:18:38,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 302.5) internal successors, (605), 2 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,887 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:38,887 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:38,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-19 21:18:38,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:38,887 INFO L85 PathProgramCache]: Analyzing trace with hash -503735289, now seen corresponding path program 1 times [2022-07-19 21:18:38,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:38,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641370082] [2022-07-19 21:18:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:38,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:38,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:38,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641370082] [2022-07-19 21:18:38,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641370082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:38,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:38,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:38,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397342264] [2022-07-19 21:18:38,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:38,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:38,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:38,903 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 370 [2022-07-19 21:18:38,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 299 transitions, 643 flow. Second operand has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:38,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 370 [2022-07-19 21:18:38,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,002 INFO L129 PetriNetUnfolder]: 0/479 cut-off events. [2022-07-19 21:18:39,002 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:18:39,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 479 events. 0/479 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1504 event pairs, 0 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-19 21:18:39,004 INFO L132 encePairwiseOnDemand]: 367/370 looper letters, 18 selfloop transitions, 2 changer transitions 0/303 dead transitions. [2022-07-19 21:18:39,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 303 transitions, 691 flow [2022-07-19 21:18:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2022-07-19 21:18:39,005 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8162162162162162 [2022-07-19 21:18:39,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2022-07-19 21:18:39,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2022-07-19 21:18:39,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2022-07-19 21:18:39,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,007 INFO L186 Difference]: Start difference. First operand has 331 places, 299 transitions, 643 flow. Second operand 3 states and 906 transitions. [2022-07-19 21:18:39,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 303 transitions, 691 flow [2022-07-19 21:18:39,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 303 transitions, 691 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:39,012 INFO L242 Difference]: Finished difference. Result has 322 places, 300 transitions, 655 flow [2022-07-19 21:18:39,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=655, PETRI_PLACES=322, PETRI_TRANSITIONS=300} [2022-07-19 21:18:39,013 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, -9 predicate places. [2022-07-19 21:18:39,013 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 300 transitions, 655 flow [2022-07-19 21:18:39,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,013 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,013 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] [2022-07-19 21:18:39,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-19 21:18:39,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1805231264, now seen corresponding path program 1 times [2022-07-19 21:18:39,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904947780] [2022-07-19 21:18:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904947780] [2022-07-19 21:18:39,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904947780] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674299622] [2022-07-19 21:18:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:39,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:39,046 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:39,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:18:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:39,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674299622] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:39,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:39,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:39,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240175437] [2022-07-19 21:18:39,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:39,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:39,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:39,204 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-07-19 21:18:39,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 300 transitions, 655 flow. Second operand has 10 states, 10 states have (on average 296.3) internal successors, (2963), 10 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-07-19 21:18:39,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,319 INFO L129 PetriNetUnfolder]: 0/453 cut-off events. [2022-07-19 21:18:39,320 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-19 21:18:39,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 453 events. 0/453 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1345 event pairs, 0 based on Foata normal form. 2/455 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-19 21:18:39,321 INFO L132 encePairwiseOnDemand]: 364/370 looper letters, 19 selfloop transitions, 9 changer transitions 0/310 dead transitions. [2022-07-19 21:18:39,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 310 transitions, 733 flow [2022-07-19 21:18:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2676 transitions. [2022-07-19 21:18:39,323 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8036036036036036 [2022-07-19 21:18:39,323 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2676 transitions. [2022-07-19 21:18:39,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2676 transitions. [2022-07-19 21:18:39,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2676 transitions. [2022-07-19 21:18:39,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 297.3333333333333) internal successors, (2676), 9 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,327 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,327 INFO L186 Difference]: Start difference. First operand has 322 places, 300 transitions, 655 flow. Second operand 9 states and 2676 transitions. [2022-07-19 21:18:39,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 310 transitions, 733 flow [2022-07-19 21:18:39,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 310 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:39,331 INFO L242 Difference]: Finished difference. Result has 332 places, 306 transitions, 703 flow [2022-07-19 21:18:39,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=703, PETRI_PLACES=332, PETRI_TRANSITIONS=306} [2022-07-19 21:18:39,332 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 1 predicate places. [2022-07-19 21:18:39,332 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 306 transitions, 703 flow [2022-07-19 21:18:39,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 296.3) internal successors, (2963), 10 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,332 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,332 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] [2022-07-19 21:18:39,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:39,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:39,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,549 INFO L85 PathProgramCache]: Analyzing trace with hash 484043797, now seen corresponding path program 1 times [2022-07-19 21:18:39,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355689376] [2022-07-19 21:18:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355689376] [2022-07-19 21:18:39,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355689376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:39,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022182556] [2022-07-19 21:18:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:39,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:39,590 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:39,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:18:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:39,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022182556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:39,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:39,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:39,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759513274] [2022-07-19 21:18:39,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:39,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:39,836 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-07-19 21:18:39,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 306 transitions, 703 flow. Second operand has 18 states, 18 states have (on average 296.6111111111111) internal successors, (5339), 18 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-07-19 21:18:39,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:40,075 INFO L129 PetriNetUnfolder]: 0/401 cut-off events. [2022-07-19 21:18:40,076 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-19 21:18:40,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 401 events. 0/401 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1006 event pairs, 0 based on Foata normal form. 4/405 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-19 21:18:40,076 INFO L132 encePairwiseOnDemand]: 364/370 looper letters, 27 selfloop transitions, 21 changer transitions 0/330 dead transitions. [2022-07-19 21:18:40,076 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 330 transitions, 907 flow [2022-07-19 21:18:40,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6226 transitions. [2022-07-19 21:18:40,080 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8012870012870013 [2022-07-19 21:18:40,080 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6226 transitions. [2022-07-19 21:18:40,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6226 transitions. [2022-07-19 21:18:40,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:40,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6226 transitions. [2022-07-19 21:18:40,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 296.4761904761905) internal successors, (6226), 21 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 370.0) internal successors, (8140), 22 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,090 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 370.0) internal successors, (8140), 22 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,090 INFO L186 Difference]: Start difference. First operand has 332 places, 306 transitions, 703 flow. Second operand 21 states and 6226 transitions. [2022-07-19 21:18:40,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 330 transitions, 907 flow [2022-07-19 21:18:40,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 330 transitions, 893 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:40,095 INFO L242 Difference]: Finished difference. Result has 356 places, 319 transitions, 827 flow [2022-07-19 21:18:40,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=827, PETRI_PLACES=356, PETRI_TRANSITIONS=319} [2022-07-19 21:18:40,095 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 25 predicate places. [2022-07-19 21:18:40,096 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 319 transitions, 827 flow [2022-07-19 21:18:40,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 296.6111111111111) internal successors, (5339), 18 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,096 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:40,096 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:40,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:40,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-19 21:18:40,313 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1803030795, now seen corresponding path program 1 times [2022-07-19 21:18:40,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:40,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651005093] [2022-07-19 21:18:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:40,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651005093] [2022-07-19 21:18:40,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651005093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:40,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10972388] [2022-07-19 21:18:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:40,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:40,430 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:40,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 21:18:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10972388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:40,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:40,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:40,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441530159] [2022-07-19 21:18:40,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:40,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:40,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:40,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:40,884 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-07-19 21:18:40,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 319 transitions, 827 flow. Second operand has 34 states, 34 states have (on average 296.79411764705884) internal successors, (10091), 34 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:40,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-07-19 21:18:40,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:41,296 INFO L129 PetriNetUnfolder]: 0/362 cut-off events. [2022-07-19 21:18:41,296 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-19 21:18:41,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 362 events. 0/362 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-19 21:18:41,297 INFO L132 encePairwiseOnDemand]: 365/370 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-07-19 21:18:41,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 328 transitions, 1017 flow [2022-07-19 21:18:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 21:18:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-19 21:18:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8881 transitions. [2022-07-19 21:18:41,316 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8000900900900901 [2022-07-19 21:18:41,317 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8881 transitions. [2022-07-19 21:18:41,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8881 transitions. [2022-07-19 21:18:41,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:41,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8881 transitions. [2022-07-19 21:18:41,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 296.03333333333336) internal successors, (8881), 30 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 370.0) internal successors, (11470), 31 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,333 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 370.0) internal successors, (11470), 31 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,333 INFO L186 Difference]: Start difference. First operand has 356 places, 319 transitions, 827 flow. Second operand 30 states and 8881 transitions. [2022-07-19 21:18:41,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 328 transitions, 1017 flow [2022-07-19 21:18:41,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:41,338 INFO L242 Difference]: Finished difference. Result has 359 places, 312 transitions, 834 flow [2022-07-19 21:18:41,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=834, PETRI_PLACES=359, PETRI_TRANSITIONS=312} [2022-07-19 21:18:41,339 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 28 predicate places. [2022-07-19 21:18:41,339 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 312 transitions, 834 flow [2022-07-19 21:18:41,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 296.79411764705884) internal successors, (10091), 34 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,340 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:41,340 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:41,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:41,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-19 21:18:41,558 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:41,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:41,558 INFO L85 PathProgramCache]: Analyzing trace with hash 226570656, now seen corresponding path program 1 times [2022-07-19 21:18:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:41,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876686805] [2022-07-19 21:18:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:41,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:41,599 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:41,643 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:41,659 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:41,659 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:41,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:41,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-19 21:18:41,659 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:18:41,660 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:41,660 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-19 21:18:41,682 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:41,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 360 places, 403 transitions, 946 flow [2022-07-19 21:18:41,792 INFO L129 PetriNetUnfolder]: 104/788 cut-off events. [2022-07-19 21:18:41,793 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-19 21:18:41,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 788 events. 104/788 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2829 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 769. Up to 22 conditions per place. [2022-07-19 21:18:41,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 403 transitions, 946 flow [2022-07-19 21:18:41,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 403 transitions, 946 flow [2022-07-19 21:18:41,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:41,819 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:41,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:41,822 INFO L129 PetriNetUnfolder]: 5/91 cut-off events. [2022-07-19 21:18:41,822 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:41,822 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:41,823 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:41,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:41,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:41,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1498309670, now seen corresponding path program 1 times [2022-07-19 21:18:41,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:41,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166085415] [2022-07-19 21:18:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:41,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:41,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:41,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166085415] [2022-07-19 21:18:41,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166085415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:41,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:41,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:41,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353370681] [2022-07-19 21:18:41,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:41,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:41,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:41,833 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 403 [2022-07-19 21:18:41,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 403 transitions, 946 flow. Second operand has 2 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:41,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 403 [2022-07-19 21:18:41,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:41,938 INFO L129 PetriNetUnfolder]: 0/673 cut-off events. [2022-07-19 21:18:41,938 INFO L130 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-07-19 21:18:41,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 673 events. 0/673 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2590 event pairs, 0 based on Foata normal form. 322/973 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-19 21:18:41,939 INFO L132 encePairwiseOnDemand]: 339/403 looper letters, 10 selfloop transitions, 0 changer transitions 12/338 dead transitions. [2022-07-19 21:18:41,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 338 transitions, 836 flow [2022-07-19 21:18:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 730 transitions. [2022-07-19 21:18:41,941 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9057071960297767 [2022-07-19 21:18:41,941 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 730 transitions. [2022-07-19 21:18:41,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 730 transitions. [2022-07-19 21:18:41,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:41,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 730 transitions. [2022-07-19 21:18:41,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 365.0) internal successors, (730), 2 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,946 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,946 INFO L186 Difference]: Start difference. First operand has 360 places, 403 transitions, 946 flow. Second operand 2 states and 730 transitions. [2022-07-19 21:18:41,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 338 transitions, 836 flow [2022-07-19 21:18:41,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 338 transitions, 746 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:41,951 INFO L242 Difference]: Finished difference. Result has 360 places, 326 transitions, 702 flow [2022-07-19 21:18:41,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=702, PETRI_PLACES=360, PETRI_TRANSITIONS=326} [2022-07-19 21:18:41,951 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 0 predicate places. [2022-07-19 21:18:41,951 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 326 transitions, 702 flow [2022-07-19 21:18:41,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,951 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:41,952 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:41,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-19 21:18:41,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:41,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1204906663, now seen corresponding path program 1 times [2022-07-19 21:18:41,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:41,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267694803] [2022-07-19 21:18:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:41,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:41,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:41,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267694803] [2022-07-19 21:18:41,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267694803] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:41,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:41,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:41,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385544593] [2022-07-19 21:18:41,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:41,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:41,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:41,966 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 403 [2022-07-19 21:18:41,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 326 transitions, 702 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:41,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 403 [2022-07-19 21:18:41,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:42,071 INFO L129 PetriNetUnfolder]: 0/528 cut-off events. [2022-07-19 21:18:42,072 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-19 21:18:42,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 528 events. 0/528 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1685 event pairs, 0 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-19 21:18:42,076 INFO L132 encePairwiseOnDemand]: 400/403 looper letters, 19 selfloop transitions, 2 changer transitions 0/330 dead transitions. [2022-07-19 21:18:42,076 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 330 transitions, 752 flow [2022-07-19 21:18:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:42,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:42,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2022-07-19 21:18:42,077 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8147229114971051 [2022-07-19 21:18:42,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 985 transitions. [2022-07-19 21:18:42,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 985 transitions. [2022-07-19 21:18:42,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:42,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 985 transitions. [2022-07-19 21:18:42,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,082 INFO L186 Difference]: Start difference. First operand has 360 places, 326 transitions, 702 flow. Second operand 3 states and 985 transitions. [2022-07-19 21:18:42,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 330 transitions, 752 flow [2022-07-19 21:18:42,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 330 transitions, 752 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:42,086 INFO L242 Difference]: Finished difference. Result has 351 places, 327 transitions, 714 flow [2022-07-19 21:18:42,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=351, PETRI_TRANSITIONS=327} [2022-07-19 21:18:42,087 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, -9 predicate places. [2022-07-19 21:18:42,087 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 327 transitions, 714 flow [2022-07-19 21:18:42,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,087 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:42,087 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] [2022-07-19 21:18:42,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-19 21:18:42,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:42,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash 144830272, now seen corresponding path program 1 times [2022-07-19 21:18:42,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:42,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507030494] [2022-07-19 21:18:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:42,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:42,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:42,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507030494] [2022-07-19 21:18:42,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507030494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:42,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650041323] [2022-07-19 21:18:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:42,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:42,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:42,116 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:42,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 21:18:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:42,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:42,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:42,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650041323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:42,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:42,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007463363] [2022-07-19 21:18:42,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:42,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:42,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:42,289 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-07-19 21:18:42,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 327 transitions, 714 flow. Second operand has 10 states, 10 states have (on average 322.3) internal successors, (3223), 10 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:42,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-07-19 21:18:42,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:42,422 INFO L129 PetriNetUnfolder]: 0/502 cut-off events. [2022-07-19 21:18:42,422 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-19 21:18:42,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 502 events. 0/502 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1531 event pairs, 0 based on Foata normal form. 2/504 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-19 21:18:42,423 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 20 selfloop transitions, 9 changer transitions 0/337 dead transitions. [2022-07-19 21:18:42,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 337 transitions, 794 flow [2022-07-19 21:18:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2911 transitions. [2022-07-19 21:18:42,425 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8025916735594155 [2022-07-19 21:18:42,425 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2911 transitions. [2022-07-19 21:18:42,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2911 transitions. [2022-07-19 21:18:42,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:42,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2911 transitions. [2022-07-19 21:18:42,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 323.44444444444446) internal successors, (2911), 9 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,430 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,430 INFO L186 Difference]: Start difference. First operand has 351 places, 327 transitions, 714 flow. Second operand 9 states and 2911 transitions. [2022-07-19 21:18:42,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 337 transitions, 794 flow [2022-07-19 21:18:42,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 337 transitions, 792 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:42,435 INFO L242 Difference]: Finished difference. Result has 361 places, 333 transitions, 762 flow [2022-07-19 21:18:42,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=762, PETRI_PLACES=361, PETRI_TRANSITIONS=333} [2022-07-19 21:18:42,435 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 1 predicate places. [2022-07-19 21:18:42,435 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 333 transitions, 762 flow [2022-07-19 21:18:42,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 322.3) internal successors, (3223), 10 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,436 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:42,436 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] [2022-07-19 21:18:42,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:42,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:42,654 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:42,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:42,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1371680437, now seen corresponding path program 1 times [2022-07-19 21:18:42,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:42,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249272756] [2022-07-19 21:18:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:42,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:42,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:42,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249272756] [2022-07-19 21:18:42,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249272756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:42,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629110193] [2022-07-19 21:18:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:42,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:42,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:42,696 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:42,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 21:18:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:42,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:42,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629110193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:42,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:42,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:42,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329951032] [2022-07-19 21:18:42,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:42,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:42,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:42,882 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-07-19 21:18:42,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 333 transitions, 762 flow. Second operand has 18 states, 18 states have (on average 322.6111111111111) internal successors, (5807), 18 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:42,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-07-19 21:18:42,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:43,105 INFO L129 PetriNetUnfolder]: 0/450 cut-off events. [2022-07-19 21:18:43,105 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-19 21:18:43,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 450 events. 0/450 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1190 event pairs, 0 based on Foata normal form. 4/454 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-19 21:18:43,106 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 28 selfloop transitions, 21 changer transitions 0/357 dead transitions. [2022-07-19 21:18:43,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 357 transitions, 968 flow [2022-07-19 21:18:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6773 transitions. [2022-07-19 21:18:43,110 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8003072196620584 [2022-07-19 21:18:43,110 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6773 transitions. [2022-07-19 21:18:43,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6773 transitions. [2022-07-19 21:18:43,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:43,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6773 transitions. [2022-07-19 21:18:43,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 322.5238095238095) internal successors, (6773), 21 states have internal predecessors, (6773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:43,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:43,121 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:43,121 INFO L186 Difference]: Start difference. First operand has 361 places, 333 transitions, 762 flow. Second operand 21 states and 6773 transitions. [2022-07-19 21:18:43,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 357 transitions, 968 flow [2022-07-19 21:18:43,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 357 transitions, 954 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:43,126 INFO L242 Difference]: Finished difference. Result has 385 places, 346 transitions, 886 flow [2022-07-19 21:18:43,127 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=886, PETRI_PLACES=385, PETRI_TRANSITIONS=346} [2022-07-19 21:18:43,127 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 25 predicate places. [2022-07-19 21:18:43,127 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 346 transitions, 886 flow [2022-07-19 21:18:43,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 322.6111111111111) internal successors, (5807), 18 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:43,128 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:43,128 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:43,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-19 21:18:43,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:43,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash -149142613, now seen corresponding path program 1 times [2022-07-19 21:18:43,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:43,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173811434] [2022-07-19 21:18:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:43,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:43,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:43,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173811434] [2022-07-19 21:18:43,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173811434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:43,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043544427] [2022-07-19 21:18:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:43,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:43,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:43,491 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:43,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 21:18:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:43,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:43,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:43,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:43,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043544427] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:43,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:43,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:43,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132708100] [2022-07-19 21:18:43,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:43,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:43,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:43,985 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-07-19 21:18:43,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 346 transitions, 886 flow. Second operand has 34 states, 34 states have (on average 322.79411764705884) internal successors, (10975), 34 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:43,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:43,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-07-19 21:18:43,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:44,333 INFO L129 PetriNetUnfolder]: 0/398 cut-off events. [2022-07-19 21:18:44,333 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-19 21:18:44,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 398 events. 0/398 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-19 21:18:44,334 INFO L132 encePairwiseOnDemand]: 398/403 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-07-19 21:18:44,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-07-19 21:18:44,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 21:18:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-19 21:18:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10628 transitions. [2022-07-19 21:18:44,339 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7991578314158959 [2022-07-19 21:18:44,339 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10628 transitions. [2022-07-19 21:18:44,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10628 transitions. [2022-07-19 21:18:44,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:44,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10628 transitions. [2022-07-19 21:18:44,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 322.06060606060606) internal successors, (10628), 33 states have internal predecessors, (10628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:44,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 403.0) internal successors, (13702), 34 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:44,394 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 403.0) internal successors, (13702), 34 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:44,394 INFO L186 Difference]: Start difference. First operand has 385 places, 346 transitions, 886 flow. Second operand 33 states and 10628 transitions. [2022-07-19 21:18:44,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-07-19 21:18:44,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:44,400 INFO L242 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-07-19 21:18:44,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=917, PETRI_PLACES=391, PETRI_TRANSITIONS=342} [2022-07-19 21:18:44,401 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 31 predicate places. [2022-07-19 21:18:44,401 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-07-19 21:18:44,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 322.79411764705884) internal successors, (10975), 34 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:44,402 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:44,402 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:44,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-19 21:18:44,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:44,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1786652926, now seen corresponding path program 1 times [2022-07-19 21:18:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:44,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604119296] [2022-07-19 21:18:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:44,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:44,657 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:44,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:44,675 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:44,675 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:44,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:44,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-19 21:18:44,675 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:18:44,676 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:44,676 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-19 21:18:44,696 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:44,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 389 places, 436 transitions, 1037 flow [2022-07-19 21:18:44,812 INFO L129 PetriNetUnfolder]: 114/860 cut-off events. [2022-07-19 21:18:44,812 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-07-19 21:18:44,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 860 events. 114/860 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3087 event pairs, 0 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 852. Up to 24 conditions per place. [2022-07-19 21:18:44,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 389 places, 436 transitions, 1037 flow [2022-07-19 21:18:44,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 436 transitions, 1037 flow [2022-07-19 21:18:44,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:44,843 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:44,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:44,847 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2022-07-19 21:18:44,847 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:44,847 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:44,847 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:44,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:44,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash 650520998, now seen corresponding path program 1 times [2022-07-19 21:18:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:44,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113180349] [2022-07-19 21:18:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:44,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:44,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:44,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113180349] [2022-07-19 21:18:44,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113180349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:44,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:44,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:44,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728558703] [2022-07-19 21:18:44,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:44,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:44,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:44,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:44,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:44,857 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 436 [2022-07-19 21:18:44,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 436 transitions, 1037 flow. Second operand has 2 states, 2 states have (on average 354.5) internal successors, (709), 2 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:44,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:44,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 436 [2022-07-19 21:18:44,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:45,009 INFO L129 PetriNetUnfolder]: 0/734 cut-off events. [2022-07-19 21:18:45,009 INFO L130 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2022-07-19 21:18:45,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 734 events. 0/734 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2888 event pairs, 0 based on Foata normal form. 386/1096 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-19 21:18:45,010 INFO L132 encePairwiseOnDemand]: 366/436 looper letters, 11 selfloop transitions, 0 changer transitions 12/365 dead transitions. [2022-07-19 21:18:45,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 365 transitions, 917 flow [2022-07-19 21:18:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 789 transitions. [2022-07-19 21:18:45,012 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9048165137614679 [2022-07-19 21:18:45,012 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 789 transitions. [2022-07-19 21:18:45,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 789 transitions. [2022-07-19 21:18:45,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:45,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 789 transitions. [2022-07-19 21:18:45,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.5) internal successors, (789), 2 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,014 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,014 INFO L186 Difference]: Start difference. First operand has 389 places, 436 transitions, 1037 flow. Second operand 2 states and 789 transitions. [2022-07-19 21:18:45,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 365 transitions, 917 flow [2022-07-19 21:18:45,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 365 transitions, 807 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:45,020 INFO L242 Difference]: Finished difference. Result has 389 places, 353 transitions, 761 flow [2022-07-19 21:18:45,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=761, PETRI_PLACES=389, PETRI_TRANSITIONS=353} [2022-07-19 21:18:45,020 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 0 predicate places. [2022-07-19 21:18:45,020 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 353 transitions, 761 flow [2022-07-19 21:18:45,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 354.5) internal successors, (709), 2 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,021 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:45,021 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:45,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-19 21:18:45,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:45,021 INFO L85 PathProgramCache]: Analyzing trace with hash 357117991, now seen corresponding path program 1 times [2022-07-19 21:18:45,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:45,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052141565] [2022-07-19 21:18:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:45,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:45,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:45,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052141565] [2022-07-19 21:18:45,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052141565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:45,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:45,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:45,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691258710] [2022-07-19 21:18:45,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:45,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:45,036 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 436 [2022-07-19 21:18:45,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 353 transitions, 761 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:45,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 436 [2022-07-19 21:18:45,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:45,162 INFO L129 PetriNetUnfolder]: 0/577 cut-off events. [2022-07-19 21:18:45,162 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:18:45,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 577 events. 0/577 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1872 event pairs, 0 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-07-19 21:18:45,163 INFO L132 encePairwiseOnDemand]: 433/436 looper letters, 20 selfloop transitions, 2 changer transitions 0/357 dead transitions. [2022-07-19 21:18:45,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 357 transitions, 813 flow [2022-07-19 21:18:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2022-07-19 21:18:45,164 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8134556574923547 [2022-07-19 21:18:45,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2022-07-19 21:18:45,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2022-07-19 21:18:45,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:45,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2022-07-19 21:18:45,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,166 INFO L186 Difference]: Start difference. First operand has 389 places, 353 transitions, 761 flow. Second operand 3 states and 1064 transitions. [2022-07-19 21:18:45,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 357 transitions, 813 flow [2022-07-19 21:18:45,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 357 transitions, 813 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:45,170 INFO L242 Difference]: Finished difference. Result has 380 places, 354 transitions, 773 flow [2022-07-19 21:18:45,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=773, PETRI_PLACES=380, PETRI_TRANSITIONS=354} [2022-07-19 21:18:45,170 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, -9 predicate places. [2022-07-19 21:18:45,170 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 354 transitions, 773 flow [2022-07-19 21:18:45,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:45,171 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] [2022-07-19 21:18:45,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-19 21:18:45,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:45,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:45,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1754914144, now seen corresponding path program 1 times [2022-07-19 21:18:45,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:45,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658044660] [2022-07-19 21:18:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:45,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:45,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:45,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658044660] [2022-07-19 21:18:45,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658044660] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:45,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596697260] [2022-07-19 21:18:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:45,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:45,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:45,190 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:45,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 21:18:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:45,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:45,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:45,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596697260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:45,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:45,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:45,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327380208] [2022-07-19 21:18:45,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:45,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:45,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:45,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:45,388 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-07-19 21:18:45,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 354 transitions, 773 flow. Second operand has 10 states, 10 states have (on average 348.3) internal successors, (3483), 10 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:45,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-07-19 21:18:45,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:45,570 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2022-07-19 21:18:45,571 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-19 21:18:45,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 551 events. 0/551 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1715 event pairs, 0 based on Foata normal form. 2/553 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-19 21:18:45,574 INFO L132 encePairwiseOnDemand]: 430/436 looper letters, 21 selfloop transitions, 9 changer transitions 0/364 dead transitions. [2022-07-19 21:18:45,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 364 transitions, 855 flow [2022-07-19 21:18:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3146 transitions. [2022-07-19 21:18:45,577 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8017329255861366 [2022-07-19 21:18:45,577 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3146 transitions. [2022-07-19 21:18:45,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3146 transitions. [2022-07-19 21:18:45,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:45,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3146 transitions. [2022-07-19 21:18:45,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 349.55555555555554) internal successors, (3146), 9 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,584 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,584 INFO L186 Difference]: Start difference. First operand has 380 places, 354 transitions, 773 flow. Second operand 9 states and 3146 transitions. [2022-07-19 21:18:45,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 364 transitions, 855 flow [2022-07-19 21:18:45,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 364 transitions, 853 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:45,590 INFO L242 Difference]: Finished difference. Result has 390 places, 360 transitions, 821 flow [2022-07-19 21:18:45,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=821, PETRI_PLACES=390, PETRI_TRANSITIONS=360} [2022-07-19 21:18:45,591 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 1 predicate places. [2022-07-19 21:18:45,591 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 360 transitions, 821 flow [2022-07-19 21:18:45,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 348.3) internal successors, (3483), 10 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:45,592 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] [2022-07-19 21:18:45,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:45,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-19 21:18:45,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:45,812 INFO L85 PathProgramCache]: Analyzing trace with hash 126719509, now seen corresponding path program 1 times [2022-07-19 21:18:45,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:45,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979810710] [2022-07-19 21:18:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:45,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:45,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:45,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979810710] [2022-07-19 21:18:45,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979810710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:45,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757475609] [2022-07-19 21:18:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:45,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:45,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:45,866 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:45,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 21:18:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:46,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:46,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:46,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757475609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:46,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:46,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:46,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716196176] [2022-07-19 21:18:46,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:46,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:46,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:46,214 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-07-19 21:18:46,216 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 360 transitions, 821 flow. Second operand has 18 states, 18 states have (on average 348.6111111111111) internal successors, (6275), 18 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:46,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-07-19 21:18:46,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:46,449 INFO L129 PetriNetUnfolder]: 0/499 cut-off events. [2022-07-19 21:18:46,450 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-07-19 21:18:46,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 499 events. 0/499 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1374 event pairs, 0 based on Foata normal form. 4/503 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-19 21:18:46,451 INFO L132 encePairwiseOnDemand]: 430/436 looper letters, 29 selfloop transitions, 21 changer transitions 0/384 dead transitions. [2022-07-19 21:18:46,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 384 transitions, 1029 flow [2022-07-19 21:18:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7320 transitions. [2022-07-19 21:18:46,461 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.799475753604194 [2022-07-19 21:18:46,461 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7320 transitions. [2022-07-19 21:18:46,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7320 transitions. [2022-07-19 21:18:46,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:46,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7320 transitions. [2022-07-19 21:18:46,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 348.57142857142856) internal successors, (7320), 21 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,470 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,470 INFO L186 Difference]: Start difference. First operand has 390 places, 360 transitions, 821 flow. Second operand 21 states and 7320 transitions. [2022-07-19 21:18:46,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 384 transitions, 1029 flow [2022-07-19 21:18:46,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 384 transitions, 1015 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:46,475 INFO L242 Difference]: Finished difference. Result has 414 places, 373 transitions, 945 flow [2022-07-19 21:18:46,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=945, PETRI_PLACES=414, PETRI_TRANSITIONS=373} [2022-07-19 21:18:46,476 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 25 predicate places. [2022-07-19 21:18:46,476 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 373 transitions, 945 flow [2022-07-19 21:18:46,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 348.6111111111111) internal successors, (6275), 18 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,476 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:46,476 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:46,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:46,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-19 21:18:46,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash -256688757, now seen corresponding path program 1 times [2022-07-19 21:18:46,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:46,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755267791] [2022-07-19 21:18:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:46,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:46,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755267791] [2022-07-19 21:18:46,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755267791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433621849] [2022-07-19 21:18:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:46,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:46,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:46,807 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:46,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 21:18:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:46,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:47,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:47,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433621849] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:47,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:47,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:47,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312355668] [2022-07-19 21:18:47,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:47,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:47,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:47,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:47,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:47,295 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-07-19 21:18:47,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 373 transitions, 945 flow. Second operand has 34 states, 34 states have (on average 348.79411764705884) internal successors, (11859), 34 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:47,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:47,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-07-19 21:18:47,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:47,651 INFO L129 PetriNetUnfolder]: 0/434 cut-off events. [2022-07-19 21:18:47,651 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-19 21:18:47,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 434 events. 0/434 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-19 21:18:47,651 INFO L132 encePairwiseOnDemand]: 431/436 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-07-19 21:18:47,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 392 transitions, 1227 flow [2022-07-19 21:18:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 21:18:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-19 21:18:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12531 transitions. [2022-07-19 21:18:47,659 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7983562691131498 [2022-07-19 21:18:47,659 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12531 transitions. [2022-07-19 21:18:47,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12531 transitions. [2022-07-19 21:18:47,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:47,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12531 transitions. [2022-07-19 21:18:47,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 348.0833333333333) internal successors, (12531), 36 states have internal predecessors, (12531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:47,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 436.0) internal successors, (16132), 37 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:47,674 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 436.0) internal successors, (16132), 37 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:47,674 INFO L186 Difference]: Start difference. First operand has 414 places, 373 transitions, 945 flow. Second operand 36 states and 12531 transitions. [2022-07-19 21:18:47,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 392 transitions, 1227 flow [2022-07-19 21:18:47,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:47,679 INFO L242 Difference]: Finished difference. Result has 423 places, 372 transitions, 1000 flow [2022-07-19 21:18:47,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1000, PETRI_PLACES=423, PETRI_TRANSITIONS=372} [2022-07-19 21:18:47,680 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 34 predicate places. [2022-07-19 21:18:47,680 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 372 transitions, 1000 flow [2022-07-19 21:18:47,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 348.79411764705884) internal successors, (11859), 34 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:47,681 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:47,681 INFO L200 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:47,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:47,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:47,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1101802981, now seen corresponding path program 1 times [2022-07-19 21:18:47,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:47,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234464363] [2022-07-19 21:18:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:47,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:47,916 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:47,941 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:47,942 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:47,942 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:47,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:47,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-19 21:18:47,943 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:18:47,943 WARN L231 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:47,943 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-07-19 21:18:47,966 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:47,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 418 places, 469 transitions, 1130 flow [2022-07-19 21:18:48,129 INFO L129 PetriNetUnfolder]: 124/932 cut-off events. [2022-07-19 21:18:48,129 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-19 21:18:48,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 932 events. 124/932 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3462 event pairs, 0 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 936. Up to 26 conditions per place. [2022-07-19 21:18:48,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 418 places, 469 transitions, 1130 flow [2022-07-19 21:18:48,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 418 places, 469 transitions, 1130 flow [2022-07-19 21:18:48,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:48,184 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:48,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:48,188 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2022-07-19 21:18:48,188 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:48,188 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:48,188 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:48,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1247865991, now seen corresponding path program 1 times [2022-07-19 21:18:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:48,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898047115] [2022-07-19 21:18:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:48,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:48,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:48,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898047115] [2022-07-19 21:18:48,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898047115] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:48,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:48,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:48,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393117960] [2022-07-19 21:18:48,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:48,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:48,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:48,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:48,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:48,208 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 469 [2022-07-19 21:18:48,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 469 transitions, 1130 flow. Second operand has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:48,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 469 [2022-07-19 21:18:48,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:48,433 INFO L129 PetriNetUnfolder]: 0/770 cut-off events. [2022-07-19 21:18:48,434 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-19 21:18:48,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 770 events. 0/770 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3037 event pairs, 0 based on Foata normal form. 2389/3135 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-07-19 21:18:48,435 INFO L132 encePairwiseOnDemand]: 390/469 looper letters, 21 selfloop transitions, 2 changer transitions 12/396 dead transitions. [2022-07-19 21:18:48,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 396 transitions, 1030 flow [2022-07-19 21:18:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1226 transitions. [2022-07-19 21:18:48,436 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8713574982231699 [2022-07-19 21:18:48,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1226 transitions. [2022-07-19 21:18:48,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1226 transitions. [2022-07-19 21:18:48,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:48,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1226 transitions. [2022-07-19 21:18:48,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 408.6666666666667) internal successors, (1226), 3 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,438 INFO L186 Difference]: Start difference. First operand has 418 places, 469 transitions, 1130 flow. Second operand 3 states and 1226 transitions. [2022-07-19 21:18:48,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 396 transitions, 1030 flow [2022-07-19 21:18:48,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 396 transitions, 898 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:48,443 INFO L242 Difference]: Finished difference. Result has 420 places, 381 transitions, 832 flow [2022-07-19 21:18:48,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=832, PETRI_PLACES=420, PETRI_TRANSITIONS=381} [2022-07-19 21:18:48,444 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 2 predicate places. [2022-07-19 21:18:48,444 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 381 transitions, 832 flow [2022-07-19 21:18:48,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,444 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:48,445 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] [2022-07-19 21:18:48,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-19 21:18:48,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:48,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1954451712, now seen corresponding path program 1 times [2022-07-19 21:18:48,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:48,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393622923] [2022-07-19 21:18:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:48,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:48,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:48,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393622923] [2022-07-19 21:18:48,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393622923] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:48,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733197869] [2022-07-19 21:18:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:48,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:48,464 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:48,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 21:18:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:48,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:48,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:48,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:48,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733197869] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:48,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:48,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:48,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206497303] [2022-07-19 21:18:48,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:48,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:48,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:48,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:48,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:48,669 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-07-19 21:18:48,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 381 transitions, 832 flow. Second operand has 10 states, 10 states have (on average 374.3) internal successors, (3743), 10 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:48,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-07-19 21:18:48,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:48,847 INFO L129 PetriNetUnfolder]: 0/600 cut-off events. [2022-07-19 21:18:48,847 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-19 21:18:48,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 600 events. 0/600 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1901 event pairs, 0 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-19 21:18:48,849 INFO L132 encePairwiseOnDemand]: 463/469 looper letters, 22 selfloop transitions, 9 changer transitions 0/391 dead transitions. [2022-07-19 21:18:48,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 391 transitions, 916 flow [2022-07-19 21:18:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:48,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3381 transitions. [2022-07-19 21:18:48,851 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8009950248756219 [2022-07-19 21:18:48,851 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3381 transitions. [2022-07-19 21:18:48,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3381 transitions. [2022-07-19 21:18:48,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:48,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3381 transitions. [2022-07-19 21:18:48,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 375.6666666666667) internal successors, (3381), 9 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,855 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,855 INFO L186 Difference]: Start difference. First operand has 420 places, 381 transitions, 832 flow. Second operand 9 states and 3381 transitions. [2022-07-19 21:18:48,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 391 transitions, 916 flow [2022-07-19 21:18:48,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 391 transitions, 914 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:48,860 INFO L242 Difference]: Finished difference. Result has 418 places, 387 transitions, 880 flow [2022-07-19 21:18:48,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=880, PETRI_PLACES=418, PETRI_TRANSITIONS=387} [2022-07-19 21:18:48,861 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 0 predicate places. [2022-07-19 21:18:48,861 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 387 transitions, 880 flow [2022-07-19 21:18:48,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 374.3) internal successors, (3743), 10 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,861 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:48,862 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] [2022-07-19 21:18:48,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:49,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:49,079 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:49,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1044128309, now seen corresponding path program 1 times [2022-07-19 21:18:49,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:49,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002092484] [2022-07-19 21:18:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:49,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:49,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:49,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002092484] [2022-07-19 21:18:49,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002092484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:49,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358543939] [2022-07-19 21:18:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:49,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:49,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:49,115 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:49,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 21:18:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:49,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:49,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:49,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:49,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358543939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:49,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:49,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:49,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554640310] [2022-07-19 21:18:49,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:49,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:49,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:49,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:49,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:49,404 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-07-19 21:18:49,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 387 transitions, 880 flow. Second operand has 18 states, 18 states have (on average 374.6111111111111) internal successors, (6743), 18 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:49,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-07-19 21:18:49,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:49,681 INFO L129 PetriNetUnfolder]: 0/548 cut-off events. [2022-07-19 21:18:49,681 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-07-19 21:18:49,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 548 events. 0/548 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1557 event pairs, 0 based on Foata normal form. 4/552 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-19 21:18:49,682 INFO L132 encePairwiseOnDemand]: 463/469 looper letters, 30 selfloop transitions, 21 changer transitions 0/411 dead transitions. [2022-07-19 21:18:49,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 411 transitions, 1090 flow [2022-07-19 21:18:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7867 transitions. [2022-07-19 21:18:49,687 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7987612955630014 [2022-07-19 21:18:49,687 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7867 transitions. [2022-07-19 21:18:49,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7867 transitions. [2022-07-19 21:18:49,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:49,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7867 transitions. [2022-07-19 21:18:49,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 374.6190476190476) internal successors, (7867), 21 states have internal predecessors, (7867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,698 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,698 INFO L186 Difference]: Start difference. First operand has 418 places, 387 transitions, 880 flow. Second operand 21 states and 7867 transitions. [2022-07-19 21:18:49,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 411 transitions, 1090 flow [2022-07-19 21:18:49,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 411 transitions, 1076 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:49,704 INFO L242 Difference]: Finished difference. Result has 442 places, 400 transitions, 1004 flow [2022-07-19 21:18:49,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1004, PETRI_PLACES=442, PETRI_TRANSITIONS=400} [2022-07-19 21:18:49,705 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 24 predicate places. [2022-07-19 21:18:49,705 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 400 transitions, 1004 flow [2022-07-19 21:18:49,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 374.6111111111111) internal successors, (6743), 18 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,706 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:49,706 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:49,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:49,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:49,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:49,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1480392363, now seen corresponding path program 1 times [2022-07-19 21:18:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:49,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723709339] [2022-07-19 21:18:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:49,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:50,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723709339] [2022-07-19 21:18:50,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723709339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277891960] [2022-07-19 21:18:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:50,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:50,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:50,047 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:50,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 21:18:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:50,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:50,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:50,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:50,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277891960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:50,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:50,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:50,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520816974] [2022-07-19 21:18:50,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:50,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:50,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:50,567 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-07-19 21:18:50,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 400 transitions, 1004 flow. Second operand has 34 states, 34 states have (on average 374.79411764705884) internal successors, (12743), 34 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:50,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:50,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-07-19 21:18:50,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:51,014 INFO L129 PetriNetUnfolder]: 0/470 cut-off events. [2022-07-19 21:18:51,014 INFO L130 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-07-19 21:18:51,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 470 events. 0/470 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1071 event pairs, 0 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-07-19 21:18:51,015 INFO L132 encePairwiseOnDemand]: 464/469 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-07-19 21:18:51,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 424 transitions, 1332 flow [2022-07-19 21:18:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 21:18:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-19 21:18:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14590 transitions. [2022-07-19 21:18:51,021 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7976600513913946 [2022-07-19 21:18:51,021 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14590 transitions. [2022-07-19 21:18:51,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14590 transitions. [2022-07-19 21:18:51,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:51,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14590 transitions. [2022-07-19 21:18:51,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 374.1025641025641) internal successors, (14590), 39 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:51,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 469.0) internal successors, (18760), 40 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:51,040 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 469.0) internal successors, (18760), 40 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:51,040 INFO L186 Difference]: Start difference. First operand has 442 places, 400 transitions, 1004 flow. Second operand 39 states and 14590 transitions. [2022-07-19 21:18:51,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 424 transitions, 1332 flow [2022-07-19 21:18:51,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:51,047 INFO L242 Difference]: Finished difference. Result has 454 places, 402 transitions, 1083 flow [2022-07-19 21:18:51,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1083, PETRI_PLACES=454, PETRI_TRANSITIONS=402} [2022-07-19 21:18:51,047 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 36 predicate places. [2022-07-19 21:18:51,047 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 402 transitions, 1083 flow [2022-07-19 21:18:51,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 374.79411764705884) internal successors, (12743), 34 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:51,049 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:51,049 INFO L200 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:51,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:51,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-19 21:18:51,267 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash 176240361, now seen corresponding path program 1 times [2022-07-19 21:18:51,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:51,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872784001] [2022-07-19 21:18:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:51,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:51,285 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:51,305 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:51,305 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:51,305 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:51,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:51,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-19 21:18:51,306 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:51,306 WARN L231 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:51,306 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-07-19 21:18:51,329 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:51,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 447 places, 502 transitions, 1225 flow [2022-07-19 21:18:51,490 INFO L129 PetriNetUnfolder]: 134/1004 cut-off events. [2022-07-19 21:18:51,490 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-19 21:18:51,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 1004 events. 134/1004 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3710 event pairs, 0 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 1021. Up to 28 conditions per place. [2022-07-19 21:18:51,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 447 places, 502 transitions, 1225 flow [2022-07-19 21:18:51,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 447 places, 502 transitions, 1225 flow [2022-07-19 21:18:51,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:51,529 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:51,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:51,532 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2022-07-19 21:18:51,532 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:51,532 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:51,532 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:51,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:51,533 INFO L85 PathProgramCache]: Analyzing trace with hash -417816633, now seen corresponding path program 1 times [2022-07-19 21:18:51,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:51,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755315137] [2022-07-19 21:18:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:51,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:51,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:51,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755315137] [2022-07-19 21:18:51,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755315137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:51,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:51,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:51,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940257535] [2022-07-19 21:18:51,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:51,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:51,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:51,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:51,545 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 502 [2022-07-19 21:18:51,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 502 transitions, 1225 flow. Second operand has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:51,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:51,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 502 [2022-07-19 21:18:51,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:51,751 INFO L129 PetriNetUnfolder]: 0/831 cut-off events. [2022-07-19 21:18:51,751 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-19 21:18:51,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 831 events. 0/831 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3298 event pairs, 0 based on Foata normal form. 2820/3625 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-07-19 21:18:51,753 INFO L132 encePairwiseOnDemand]: 417/502 looper letters, 22 selfloop transitions, 2 changer transitions 12/423 dead transitions. [2022-07-19 21:18:51,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 423 transitions, 1115 flow [2022-07-19 21:18:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1311 transitions. [2022-07-19 21:18:51,754 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8705179282868526 [2022-07-19 21:18:51,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1311 transitions. [2022-07-19 21:18:51,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1311 transitions. [2022-07-19 21:18:51,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:51,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1311 transitions. [2022-07-19 21:18:51,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 437.0) internal successors, (1311), 3 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:51,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:51,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:51,756 INFO L186 Difference]: Start difference. First operand has 447 places, 502 transitions, 1225 flow. Second operand 3 states and 1311 transitions. [2022-07-19 21:18:51,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 423 transitions, 1115 flow [2022-07-19 21:18:51,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 423 transitions, 959 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:51,762 INFO L242 Difference]: Finished difference. Result has 449 places, 408 transitions, 891 flow [2022-07-19 21:18:51,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=891, PETRI_PLACES=449, PETRI_TRANSITIONS=408} [2022-07-19 21:18:51,763 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 2 predicate places. [2022-07-19 21:18:51,763 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 408 transitions, 891 flow [2022-07-19 21:18:51,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:51,763 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:51,763 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] [2022-07-19 21:18:51,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-19 21:18:51,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1901634592, now seen corresponding path program 1 times [2022-07-19 21:18:51,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:51,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832332918] [2022-07-19 21:18:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:51,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:51,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:51,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832332918] [2022-07-19 21:18:51,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832332918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:51,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750523631] [2022-07-19 21:18:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:51,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:51,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:51,784 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:51,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 21:18:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:51,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:51,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:52,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:52,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750523631] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:52,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:52,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:52,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177053674] [2022-07-19 21:18:52,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:52,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:52,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:52,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:52,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:52,033 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-07-19 21:18:52,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 408 transitions, 891 flow. Second operand has 10 states, 10 states have (on average 400.3) internal successors, (4003), 10 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:52,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-07-19 21:18:52,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:52,234 INFO L129 PetriNetUnfolder]: 0/649 cut-off events. [2022-07-19 21:18:52,234 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-19 21:18:52,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 649 events. 0/649 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2085 event pairs, 0 based on Foata normal form. 2/651 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-19 21:18:52,248 INFO L132 encePairwiseOnDemand]: 496/502 looper letters, 23 selfloop transitions, 9 changer transitions 0/418 dead transitions. [2022-07-19 21:18:52,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 418 transitions, 977 flow [2022-07-19 21:18:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3616 transitions. [2022-07-19 21:18:52,261 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8003541389995573 [2022-07-19 21:18:52,261 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3616 transitions. [2022-07-19 21:18:52,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3616 transitions. [2022-07-19 21:18:52,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:52,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3616 transitions. [2022-07-19 21:18:52,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 401.77777777777777) internal successors, (3616), 9 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 502.0) internal successors, (5020), 10 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,266 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 502.0) internal successors, (5020), 10 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,266 INFO L186 Difference]: Start difference. First operand has 449 places, 408 transitions, 891 flow. Second operand 9 states and 3616 transitions. [2022-07-19 21:18:52,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 418 transitions, 977 flow [2022-07-19 21:18:52,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 418 transitions, 975 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:52,274 INFO L242 Difference]: Finished difference. Result has 447 places, 414 transitions, 939 flow [2022-07-19 21:18:52,275 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=939, PETRI_PLACES=447, PETRI_TRANSITIONS=414} [2022-07-19 21:18:52,275 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 0 predicate places. [2022-07-19 21:18:52,275 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 414 transitions, 939 flow [2022-07-19 21:18:52,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 400.3) internal successors, (4003), 10 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,276 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:52,276 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] [2022-07-19 21:18:52,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:52,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-19 21:18:52,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:52,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:52,496 INFO L85 PathProgramCache]: Analyzing trace with hash -171060459, now seen corresponding path program 1 times [2022-07-19 21:18:52,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:52,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084052160] [2022-07-19 21:18:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:52,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:52,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:52,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084052160] [2022-07-19 21:18:52,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084052160] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:52,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554171661] [2022-07-19 21:18:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:52,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:52,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:52,544 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:52,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 21:18:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:52,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:52,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:52,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554171661] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:52,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:52,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:52,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16765081] [2022-07-19 21:18:52,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:52,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:52,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:52,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:52,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:52,848 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-07-19 21:18:52,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 414 transitions, 939 flow. Second operand has 18 states, 18 states have (on average 400.6111111111111) internal successors, (7211), 18 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:52,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-07-19 21:18:52,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:53,146 INFO L129 PetriNetUnfolder]: 0/597 cut-off events. [2022-07-19 21:18:53,146 INFO L130 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-07-19 21:18:53,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 597 events. 0/597 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1739 event pairs, 0 based on Foata normal form. 4/601 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-19 21:18:53,148 INFO L132 encePairwiseOnDemand]: 496/502 looper letters, 31 selfloop transitions, 21 changer transitions 0/438 dead transitions. [2022-07-19 21:18:53,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 438 transitions, 1151 flow [2022-07-19 21:18:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8414 transitions. [2022-07-19 21:18:53,152 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.798140770252324 [2022-07-19 21:18:53,152 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8414 transitions. [2022-07-19 21:18:53,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8414 transitions. [2022-07-19 21:18:53,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:53,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8414 transitions. [2022-07-19 21:18:53,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 400.6666666666667) internal successors, (8414), 21 states have internal predecessors, (8414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 502.0) internal successors, (11044), 22 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,163 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 502.0) internal successors, (11044), 22 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,163 INFO L186 Difference]: Start difference. First operand has 447 places, 414 transitions, 939 flow. Second operand 21 states and 8414 transitions. [2022-07-19 21:18:53,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 438 transitions, 1151 flow [2022-07-19 21:18:53,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 438 transitions, 1137 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:53,169 INFO L242 Difference]: Finished difference. Result has 471 places, 427 transitions, 1063 flow [2022-07-19 21:18:53,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1063, PETRI_PLACES=471, PETRI_TRANSITIONS=427} [2022-07-19 21:18:53,170 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 24 predicate places. [2022-07-19 21:18:53,170 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 427 transitions, 1063 flow [2022-07-19 21:18:53,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 400.6111111111111) internal successors, (7211), 18 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:53,171 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:53,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:53,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-19 21:18:53,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash 767133451, now seen corresponding path program 1 times [2022-07-19 21:18:53,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:53,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787175490] [2022-07-19 21:18:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:53,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:53,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787175490] [2022-07-19 21:18:53,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787175490] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:53,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722922404] [2022-07-19 21:18:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:53,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:53,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:53,528 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:53,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 21:18:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:53,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:53,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:54,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722922404] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:54,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:54,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:54,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067581508] [2022-07-19 21:18:54,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:54,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:54,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:54,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:54,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:54,113 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-07-19 21:18:54,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 427 transitions, 1063 flow. Second operand has 34 states, 34 states have (on average 400.79411764705884) internal successors, (13627), 34 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:54,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:54,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-07-19 21:18:54,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:54,531 INFO L129 PetriNetUnfolder]: 0/506 cut-off events. [2022-07-19 21:18:54,531 INFO L130 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-07-19 21:18:54,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 506 events. 0/506 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-19 21:18:54,534 INFO L132 encePairwiseOnDemand]: 497/502 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-07-19 21:18:54,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 456 transitions, 1437 flow [2022-07-19 21:18:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-19 21:18:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-19 21:18:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16805 transitions. [2022-07-19 21:18:54,542 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7970498956554734 [2022-07-19 21:18:54,542 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16805 transitions. [2022-07-19 21:18:54,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16805 transitions. [2022-07-19 21:18:54,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:54,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16805 transitions. [2022-07-19 21:18:54,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 400.1190476190476) internal successors, (16805), 42 states have internal predecessors, (16805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:54,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:54,565 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:54,565 INFO L186 Difference]: Start difference. First operand has 471 places, 427 transitions, 1063 flow. Second operand 42 states and 16805 transitions. [2022-07-19 21:18:54,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 456 transitions, 1437 flow [2022-07-19 21:18:54,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:54,572 INFO L242 Difference]: Finished difference. Result has 486 places, 432 transitions, 1166 flow [2022-07-19 21:18:54,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1166, PETRI_PLACES=486, PETRI_TRANSITIONS=432} [2022-07-19 21:18:54,573 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 39 predicate places. [2022-07-19 21:18:54,573 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 432 transitions, 1166 flow [2022-07-19 21:18:54,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 400.79411764705884) internal successors, (13627), 34 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:54,574 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:54,574 INFO L200 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:54,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:54,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:54,791 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1834102098, now seen corresponding path program 1 times [2022-07-19 21:18:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:54,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428950396] [2022-07-19 21:18:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:54,846 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:54,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:54,900 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:54,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:54,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:54,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-19 21:18:54,901 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:54,902 WARN L231 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:54,902 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-07-19 21:18:54,928 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:54,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 476 places, 535 transitions, 1322 flow [2022-07-19 21:18:55,125 INFO L129 PetriNetUnfolder]: 144/1076 cut-off events. [2022-07-19 21:18:55,125 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-19 21:18:55,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 1076 events. 144/1076 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4007 event pairs, 0 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 1107. Up to 30 conditions per place. [2022-07-19 21:18:55,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 476 places, 535 transitions, 1322 flow [2022-07-19 21:18:55,177 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 476 places, 535 transitions, 1322 flow [2022-07-19 21:18:55,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:55,178 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:55,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:55,196 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-19 21:18:55,196 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:55,196 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:55,196 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:55,196 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:55,197 INFO L85 PathProgramCache]: Analyzing trace with hash -51559578, now seen corresponding path program 1 times [2022-07-19 21:18:55,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:55,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736611845] [2022-07-19 21:18:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:55,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:55,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:55,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736611845] [2022-07-19 21:18:55,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736611845] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:55,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:55,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:55,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464049272] [2022-07-19 21:18:55,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:55,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:55,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:55,232 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 432 out of 535 [2022-07-19 21:18:55,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 535 transitions, 1322 flow. Second operand has 2 states, 2 states have (on average 432.5) internal successors, (865), 2 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:55,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 432 of 535 [2022-07-19 21:18:55,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:55,482 INFO L129 PetriNetUnfolder]: 0/917 cut-off events. [2022-07-19 21:18:55,482 INFO L130 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-07-19 21:18:55,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 917 events. 0/917 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3663 event pairs, 0 based on Foata normal form. 614/1501 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-19 21:18:55,484 INFO L132 encePairwiseOnDemand]: 447/535 looper letters, 14 selfloop transitions, 0 changer transitions 12/446 dead transitions. [2022-07-19 21:18:55,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 446 transitions, 1172 flow [2022-07-19 21:18:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 966 transitions. [2022-07-19 21:18:55,485 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.902803738317757 [2022-07-19 21:18:55,485 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 966 transitions. [2022-07-19 21:18:55,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 966 transitions. [2022-07-19 21:18:55,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:55,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 966 transitions. [2022-07-19 21:18:55,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 483.0) internal successors, (966), 2 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,487 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,487 INFO L186 Difference]: Start difference. First operand has 476 places, 535 transitions, 1322 flow. Second operand 2 states and 966 transitions. [2022-07-19 21:18:55,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 446 transitions, 1172 flow [2022-07-19 21:18:55,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 446 transitions, 990 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:55,493 INFO L242 Difference]: Finished difference. Result has 476 places, 434 transitions, 938 flow [2022-07-19 21:18:55,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=938, PETRI_PLACES=476, PETRI_TRANSITIONS=434} [2022-07-19 21:18:55,494 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 0 predicate places. [2022-07-19 21:18:55,494 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 434 transitions, 938 flow [2022-07-19 21:18:55,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 432.5) internal successors, (865), 2 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,494 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:55,494 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:55,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-19 21:18:55,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:55,495 INFO L85 PathProgramCache]: Analyzing trace with hash -344962585, now seen corresponding path program 1 times [2022-07-19 21:18:55,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:55,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225112882] [2022-07-19 21:18:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:55,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:55,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:55,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225112882] [2022-07-19 21:18:55,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225112882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:55,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:55,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:55,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388894532] [2022-07-19 21:18:55,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:55,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:55,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:55,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:55,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:55,508 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 535 [2022-07-19 21:18:55,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 434 transitions, 938 flow. Second operand has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:55,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 535 [2022-07-19 21:18:55,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:55,696 INFO L129 PetriNetUnfolder]: 0/724 cut-off events. [2022-07-19 21:18:55,696 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-19 21:18:55,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 724 events. 0/724 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2417 event pairs, 0 based on Foata normal form. 0/710 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2022-07-19 21:18:55,698 INFO L132 encePairwiseOnDemand]: 532/535 looper letters, 23 selfloop transitions, 2 changer transitions 0/438 dead transitions. [2022-07-19 21:18:55,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 438 transitions, 996 flow [2022-07-19 21:18:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1301 transitions. [2022-07-19 21:18:55,699 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8105919003115265 [2022-07-19 21:18:55,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1301 transitions. [2022-07-19 21:18:55,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1301 transitions. [2022-07-19 21:18:55,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:55,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1301 transitions. [2022-07-19 21:18:55,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 433.6666666666667) internal successors, (1301), 3 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,702 INFO L186 Difference]: Start difference. First operand has 476 places, 434 transitions, 938 flow. Second operand 3 states and 1301 transitions. [2022-07-19 21:18:55,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 438 transitions, 996 flow [2022-07-19 21:18:55,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 438 transitions, 996 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:55,707 INFO L242 Difference]: Finished difference. Result has 467 places, 435 transitions, 950 flow [2022-07-19 21:18:55,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=950, PETRI_PLACES=467, PETRI_TRANSITIONS=435} [2022-07-19 21:18:55,708 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, -9 predicate places. [2022-07-19 21:18:55,708 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 435 transitions, 950 flow [2022-07-19 21:18:55,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,709 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:55,709 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] [2022-07-19 21:18:55,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-07-19 21:18:55,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:55,710 INFO L85 PathProgramCache]: Analyzing trace with hash 438271168, now seen corresponding path program 1 times [2022-07-19 21:18:55,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:55,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644974585] [2022-07-19 21:18:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:55,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:55,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:55,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644974585] [2022-07-19 21:18:55,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644974585] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:55,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761961890] [2022-07-19 21:18:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:55,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:55,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:55,746 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:55,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 21:18:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:55,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:55,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:55,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:55,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761961890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:55,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:55,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:55,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313538215] [2022-07-19 21:18:55,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:55,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:55,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:55,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:55,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:55,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-07-19 21:18:55,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 435 transitions, 950 flow. Second operand has 10 states, 10 states have (on average 426.3) internal successors, (4263), 10 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:55,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-07-19 21:18:55,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:56,214 INFO L129 PetriNetUnfolder]: 0/698 cut-off events. [2022-07-19 21:18:56,215 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:18:56,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 698 events. 0/698 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2266 event pairs, 0 based on Foata normal form. 2/700 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-19 21:18:56,216 INFO L132 encePairwiseOnDemand]: 529/535 looper letters, 24 selfloop transitions, 9 changer transitions 0/445 dead transitions. [2022-07-19 21:18:56,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 445 transitions, 1038 flow [2022-07-19 21:18:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3851 transitions. [2022-07-19 21:18:56,218 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7997923156801662 [2022-07-19 21:18:56,218 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3851 transitions. [2022-07-19 21:18:56,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3851 transitions. [2022-07-19 21:18:56,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:56,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3851 transitions. [2022-07-19 21:18:56,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 427.8888888888889) internal successors, (3851), 9 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 535.0) internal successors, (5350), 10 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,223 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 535.0) internal successors, (5350), 10 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,223 INFO L186 Difference]: Start difference. First operand has 467 places, 435 transitions, 950 flow. Second operand 9 states and 3851 transitions. [2022-07-19 21:18:56,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 445 transitions, 1038 flow [2022-07-19 21:18:56,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 445 transitions, 1036 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:56,228 INFO L242 Difference]: Finished difference. Result has 477 places, 441 transitions, 998 flow [2022-07-19 21:18:56,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=998, PETRI_PLACES=477, PETRI_TRANSITIONS=441} [2022-07-19 21:18:56,229 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 1 predicate places. [2022-07-19 21:18:56,229 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 441 transitions, 998 flow [2022-07-19 21:18:56,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 426.3) internal successors, (4263), 10 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,229 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:56,229 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] [2022-07-19 21:18:56,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-19 21:18:56,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:56,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:56,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:56,445 INFO L85 PathProgramCache]: Analyzing trace with hash 776120501, now seen corresponding path program 1 times [2022-07-19 21:18:56,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:56,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243537993] [2022-07-19 21:18:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:56,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:56,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:56,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243537993] [2022-07-19 21:18:56,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243537993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:56,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031932422] [2022-07-19 21:18:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:56,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:56,499 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:56,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 21:18:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:56,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:56,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:56,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031932422] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:56,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:56,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:56,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364508455] [2022-07-19 21:18:56,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:56,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:56,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:56,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-07-19 21:18:56,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 441 transitions, 998 flow. Second operand has 18 states, 18 states have (on average 426.6111111111111) internal successors, (7679), 18 states have internal predecessors, (7679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:56,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-07-19 21:18:56,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:57,217 INFO L129 PetriNetUnfolder]: 0/646 cut-off events. [2022-07-19 21:18:57,217 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-07-19 21:18:57,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 646 events. 0/646 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1925 event pairs, 0 based on Foata normal form. 4/650 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-19 21:18:57,219 INFO L132 encePairwiseOnDemand]: 529/535 looper letters, 32 selfloop transitions, 21 changer transitions 0/465 dead transitions. [2022-07-19 21:18:57,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 465 transitions, 1212 flow [2022-07-19 21:18:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8961 transitions. [2022-07-19 21:18:57,223 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7975967957276369 [2022-07-19 21:18:57,224 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8961 transitions. [2022-07-19 21:18:57,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8961 transitions. [2022-07-19 21:18:57,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:57,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8961 transitions. [2022-07-19 21:18:57,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 426.7142857142857) internal successors, (8961), 21 states have internal predecessors, (8961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:57,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 535.0) internal successors, (11770), 22 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:57,235 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 535.0) internal successors, (11770), 22 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:57,235 INFO L186 Difference]: Start difference. First operand has 477 places, 441 transitions, 998 flow. Second operand 21 states and 8961 transitions. [2022-07-19 21:18:57,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 465 transitions, 1212 flow [2022-07-19 21:18:57,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 465 transitions, 1198 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:57,242 INFO L242 Difference]: Finished difference. Result has 501 places, 454 transitions, 1122 flow [2022-07-19 21:18:57,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1122, PETRI_PLACES=501, PETRI_TRANSITIONS=454} [2022-07-19 21:18:57,242 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 25 predicate places. [2022-07-19 21:18:57,243 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 454 transitions, 1122 flow [2022-07-19 21:18:57,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 426.6111111111111) internal successors, (7679), 18 states have internal predecessors, (7679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:57,243 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:57,244 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:57,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-19 21:18:57,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-19 21:18:57,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1898501803, now seen corresponding path program 1 times [2022-07-19 21:18:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:57,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113495256] [2022-07-19 21:18:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:57,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:57,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:57,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113495256] [2022-07-19 21:18:57,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113495256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:57,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290959158] [2022-07-19 21:18:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:57,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:57,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:57,576 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:57,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-19 21:18:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:57,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:58,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290959158] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:58,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:58,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782809281] [2022-07-19 21:18:58,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:58,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:58,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:58,156 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-07-19 21:18:58,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 454 transitions, 1122 flow. Second operand has 34 states, 34 states have (on average 426.79411764705884) internal successors, (14511), 34 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:58,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:58,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-07-19 21:18:58,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:58,725 INFO L129 PetriNetUnfolder]: 0/542 cut-off events. [2022-07-19 21:18:58,726 INFO L130 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-07-19 21:18:58,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 542 events. 0/542 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1267 event pairs, 0 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-07-19 21:18:58,727 INFO L132 encePairwiseOnDemand]: 530/535 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-07-19 21:18:58,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 488 transitions, 1542 flow [2022-07-19 21:18:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:18:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:18:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19176 transitions. [2022-07-19 21:18:58,735 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7965109034267913 [2022-07-19 21:18:58,736 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19176 transitions. [2022-07-19 21:18:58,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19176 transitions. [2022-07-19 21:18:58,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:58,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19176 transitions. [2022-07-19 21:18:58,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 426.1333333333333) internal successors, (19176), 45 states have internal predecessors, (19176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:58,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 535.0) internal successors, (24610), 46 states have internal predecessors, (24610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:58,761 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 535.0) internal successors, (24610), 46 states have internal predecessors, (24610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:58,761 INFO L186 Difference]: Start difference. First operand has 501 places, 454 transitions, 1122 flow. Second operand 45 states and 19176 transitions. [2022-07-19 21:18:58,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 488 transitions, 1542 flow [2022-07-19 21:18:58,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:58,768 INFO L242 Difference]: Finished difference. Result has 519 places, 462 transitions, 1249 flow [2022-07-19 21:18:58,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1249, PETRI_PLACES=519, PETRI_TRANSITIONS=462} [2022-07-19 21:18:58,768 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 43 predicate places. [2022-07-19 21:18:58,769 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 462 transitions, 1249 flow [2022-07-19 21:18:58,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 426.79411764705884) internal successors, (14511), 34 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:58,770 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:58,770 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:58,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-19 21:18:58,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:58,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1167770068, now seen corresponding path program 1 times [2022-07-19 21:18:58,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:58,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963392335] [2022-07-19 21:18:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:58,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:59,008 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:59,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:59,036 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:59,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:59,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:59,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-07-19 21:18:59,037 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:18:59,037 WARN L231 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:59,037 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-07-19 21:18:59,092 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:59,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 505 places, 568 transitions, 1421 flow [2022-07-19 21:18:59,300 INFO L129 PetriNetUnfolder]: 154/1148 cut-off events. [2022-07-19 21:18:59,301 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-19 21:18:59,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1314 conditions, 1148 events. 154/1148 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4321 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 1196. Up to 32 conditions per place. [2022-07-19 21:18:59,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 505 places, 568 transitions, 1421 flow [2022-07-19 21:18:59,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 505 places, 568 transitions, 1421 flow [2022-07-19 21:18:59,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:59,362 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:18:59,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:59,366 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2022-07-19 21:18:59,366 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:59,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:59,367 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:59,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1466428135, now seen corresponding path program 1 times [2022-07-19 21:18:59,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:59,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882985719] [2022-07-19 21:18:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:59,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:59,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:59,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882985719] [2022-07-19 21:18:59,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882985719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:59,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:59,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:59,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081702153] [2022-07-19 21:18:59,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:59,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:59,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:59,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:59,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:59,382 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 451 out of 568 [2022-07-19 21:18:59,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 568 transitions, 1421 flow. Second operand has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:59,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 451 of 568 [2022-07-19 21:18:59,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:59,647 INFO L129 PetriNetUnfolder]: 0/953 cut-off events. [2022-07-19 21:18:59,648 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-19 21:18:59,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 953 events. 0/953 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3853 event pairs, 0 based on Foata normal form. 3789/4712 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2022-07-19 21:18:59,649 INFO L132 encePairwiseOnDemand]: 471/568 looper letters, 24 selfloop transitions, 2 changer transitions 12/477 dead transitions. [2022-07-19 21:18:59,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 477 transitions, 1291 flow [2022-07-19 21:18:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1481 transitions. [2022-07-19 21:18:59,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.869131455399061 [2022-07-19 21:18:59,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1481 transitions. [2022-07-19 21:18:59,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1481 transitions. [2022-07-19 21:18:59,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:59,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1481 transitions. [2022-07-19 21:18:59,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,653 INFO L186 Difference]: Start difference. First operand has 505 places, 568 transitions, 1421 flow. Second operand 3 states and 1481 transitions. [2022-07-19 21:18:59,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 477 transitions, 1291 flow [2022-07-19 21:18:59,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 477 transitions, 1081 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:59,659 INFO L242 Difference]: Finished difference. Result has 507 places, 462 transitions, 1009 flow [2022-07-19 21:18:59,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1009, PETRI_PLACES=507, PETRI_TRANSITIONS=462} [2022-07-19 21:18:59,660 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 2 predicate places. [2022-07-19 21:18:59,660 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 462 transitions, 1009 flow [2022-07-19 21:18:59,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:59,661 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] [2022-07-19 21:18:59,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-07-19 21:18:59,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:59,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2049574688, now seen corresponding path program 1 times [2022-07-19 21:18:59,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:59,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233627268] [2022-07-19 21:18:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:59,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:59,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233627268] [2022-07-19 21:18:59,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233627268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:59,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039799581] [2022-07-19 21:18:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:59,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:59,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:59,681 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:59,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-19 21:18:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:59,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:59,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:59,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039799581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:59,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:59,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:59,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674514808] [2022-07-19 21:18:59,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:59,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:59,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:59,951 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-07-19 21:18:59,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 462 transitions, 1009 flow. Second operand has 10 states, 10 states have (on average 452.3) internal successors, (4523), 10 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:59,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-07-19 21:18:59,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:00,182 INFO L129 PetriNetUnfolder]: 0/747 cut-off events. [2022-07-19 21:19:00,182 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-19 21:19:00,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 747 events. 0/747 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2447 event pairs, 0 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-19 21:19:00,183 INFO L132 encePairwiseOnDemand]: 562/568 looper letters, 25 selfloop transitions, 9 changer transitions 0/472 dead transitions. [2022-07-19 21:19:00,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 472 transitions, 1099 flow [2022-07-19 21:19:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4086 transitions. [2022-07-19 21:19:00,186 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7992957746478874 [2022-07-19 21:19:00,186 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4086 transitions. [2022-07-19 21:19:00,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4086 transitions. [2022-07-19 21:19:00,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:00,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4086 transitions. [2022-07-19 21:19:00,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 454.0) internal successors, (4086), 9 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:00,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 568.0) internal successors, (5680), 10 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:00,191 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 568.0) internal successors, (5680), 10 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:00,191 INFO L186 Difference]: Start difference. First operand has 507 places, 462 transitions, 1009 flow. Second operand 9 states and 4086 transitions. [2022-07-19 21:19:00,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 472 transitions, 1099 flow [2022-07-19 21:19:00,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 472 transitions, 1097 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:00,197 INFO L242 Difference]: Finished difference. Result has 505 places, 468 transitions, 1057 flow [2022-07-19 21:19:00,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1057, PETRI_PLACES=505, PETRI_TRANSITIONS=468} [2022-07-19 21:19:00,197 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 0 predicate places. [2022-07-19 21:19:00,198 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 468 transitions, 1057 flow [2022-07-19 21:19:00,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 452.3) internal successors, (4523), 10 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:00,198 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:00,198 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] [2022-07-19 21:19:00,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:00,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:00,407 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:00,407 INFO L85 PathProgramCache]: Analyzing trace with hash -409296107, now seen corresponding path program 1 times [2022-07-19 21:19:00,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:00,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767433580] [2022-07-19 21:19:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:00,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:00,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:00,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767433580] [2022-07-19 21:19:00,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767433580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:00,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405040459] [2022-07-19 21:19:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:00,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:00,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:00,474 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:00,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-19 21:19:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:00,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:00,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:00,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:00,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405040459] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:00,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:00,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:00,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256352203] [2022-07-19 21:19:00,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:00,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:00,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:00,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:00,821 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-07-19 21:19:00,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 468 transitions, 1057 flow. Second operand has 18 states, 18 states have (on average 452.6111111111111) internal successors, (8147), 18 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:00,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:00,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-07-19 21:19:00,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:01,215 INFO L129 PetriNetUnfolder]: 0/695 cut-off events. [2022-07-19 21:19:01,216 INFO L130 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-07-19 21:19:01,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 695 events. 0/695 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2103 event pairs, 0 based on Foata normal form. 4/699 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-19 21:19:01,217 INFO L132 encePairwiseOnDemand]: 562/568 looper letters, 33 selfloop transitions, 21 changer transitions 0/492 dead transitions. [2022-07-19 21:19:01,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 492 transitions, 1273 flow [2022-07-19 21:19:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9508 transitions. [2022-07-19 21:19:01,225 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7971160295103957 [2022-07-19 21:19:01,226 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9508 transitions. [2022-07-19 21:19:01,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9508 transitions. [2022-07-19 21:19:01,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:01,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9508 transitions. [2022-07-19 21:19:01,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 452.76190476190476) internal successors, (9508), 21 states have internal predecessors, (9508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 568.0) internal successors, (12496), 22 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,246 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 568.0) internal successors, (12496), 22 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,246 INFO L186 Difference]: Start difference. First operand has 505 places, 468 transitions, 1057 flow. Second operand 21 states and 9508 transitions. [2022-07-19 21:19:01,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 492 transitions, 1273 flow [2022-07-19 21:19:01,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 492 transitions, 1259 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:01,254 INFO L242 Difference]: Finished difference. Result has 529 places, 481 transitions, 1181 flow [2022-07-19 21:19:01,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1181, PETRI_PLACES=529, PETRI_TRANSITIONS=481} [2022-07-19 21:19:01,255 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 24 predicate places. [2022-07-19 21:19:01,255 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 481 transitions, 1181 flow [2022-07-19 21:19:01,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 452.6111111111111) internal successors, (8147), 18 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,257 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:01,257 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:01,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:01,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-07-19 21:19:01,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash 579530123, now seen corresponding path program 1 times [2022-07-19 21:19:01,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:01,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167261222] [2022-07-19 21:19:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:01,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:01,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:01,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167261222] [2022-07-19 21:19:01,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167261222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:01,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224977098] [2022-07-19 21:19:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:01,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:01,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:01,574 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:01,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-19 21:19:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:01,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:01,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:01,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:02,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224977098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:02,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:02,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:02,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218785763] [2022-07-19 21:19:02,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:02,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:02,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:02,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:02,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:02,184 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-07-19 21:19:02,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 481 transitions, 1181 flow. Second operand has 34 states, 34 states have (on average 452.79411764705884) internal successors, (15395), 34 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:02,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:02,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-07-19 21:19:02,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:02,717 INFO L129 PetriNetUnfolder]: 0/591 cut-off events. [2022-07-19 21:19:02,718 INFO L130 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-07-19 21:19:02,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 591 events. 0/591 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1423 event pairs, 0 based on Foata normal form. 8/599 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-19 21:19:02,719 INFO L132 encePairwiseOnDemand]: 562/568 looper letters, 49 selfloop transitions, 45 changer transitions 0/532 dead transitions. [2022-07-19 21:19:02,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 532 transitions, 1685 flow [2022-07-19 21:19:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20352 transitions. [2022-07-19 21:19:02,732 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7962441314553991 [2022-07-19 21:19:02,732 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20352 transitions. [2022-07-19 21:19:02,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20352 transitions. [2022-07-19 21:19:02,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:02,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20352 transitions. [2022-07-19 21:19:02,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 452.26666666666665) internal successors, (20352), 45 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:02,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 568.0) internal successors, (26128), 46 states have internal predecessors, (26128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:02,770 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 568.0) internal successors, (26128), 46 states have internal predecessors, (26128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:02,770 INFO L186 Difference]: Start difference. First operand has 529 places, 481 transitions, 1181 flow. Second operand 45 states and 20352 transitions. [2022-07-19 21:19:02,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 532 transitions, 1685 flow [2022-07-19 21:19:02,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 532 transitions, 1645 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:02,780 INFO L242 Difference]: Finished difference. Result has 576 places, 506 transitions, 1459 flow [2022-07-19 21:19:02,781 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1459, PETRI_PLACES=576, PETRI_TRANSITIONS=506} [2022-07-19 21:19:02,781 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 71 predicate places. [2022-07-19 21:19:02,782 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 506 transitions, 1459 flow [2022-07-19 21:19:02,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 452.79411764705884) internal successors, (15395), 34 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:02,783 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:02,784 INFO L200 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:02,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:02,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:02,998 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:02,998 INFO L85 PathProgramCache]: Analyzing trace with hash -813914885, now seen corresponding path program 1 times [2022-07-19 21:19:02,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:02,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164315372] [2022-07-19 21:19:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:02,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:03,043 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:03,097 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:03,097 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:03,097 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:03,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:03,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-07-19 21:19:03,098 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:19:03,098 WARN L231 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:03,098 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-07-19 21:19:03,137 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:03,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 534 places, 601 transitions, 1522 flow [2022-07-19 21:19:03,485 INFO L129 PetriNetUnfolder]: 164/1220 cut-off events. [2022-07-19 21:19:03,485 INFO L130 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-07-19 21:19:03,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1405 conditions, 1220 events. 164/1220 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4564 event pairs, 0 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 1286. Up to 34 conditions per place. [2022-07-19 21:19:03,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 534 places, 601 transitions, 1522 flow [2022-07-19 21:19:03,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 534 places, 601 transitions, 1522 flow [2022-07-19 21:19:03,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:03,578 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:19:03,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:03,582 INFO L129 PetriNetUnfolder]: 4/92 cut-off events. [2022-07-19 21:19:03,582 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:03,582 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:03,582 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:03,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:03,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:03,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1014791238, now seen corresponding path program 1 times [2022-07-19 21:19:03,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:03,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420019601] [2022-07-19 21:19:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:03,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:03,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:03,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420019601] [2022-07-19 21:19:03,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420019601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:03,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:03,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:19:03,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257601147] [2022-07-19 21:19:03,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:19:03,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:19:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:19:03,598 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 484 out of 601 [2022-07-19 21:19:03,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 601 transitions, 1522 flow. Second operand has 2 states, 2 states have (on average 484.5) internal successors, (969), 2 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:03,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:03,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 484 of 601 [2022-07-19 21:19:03,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:03,917 INFO L129 PetriNetUnfolder]: 0/1039 cut-off events. [2022-07-19 21:19:03,917 INFO L130 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2022-07-19 21:19:03,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1241 conditions, 1039 events. 0/1039 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4284 event pairs, 0 based on Foata normal form. 796/1801 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-19 21:19:03,920 INFO L132 encePairwiseOnDemand]: 501/601 looper letters, 16 selfloop transitions, 0 changer transitions 12/500 dead transitions. [2022-07-19 21:19:03,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 500 transitions, 1352 flow [2022-07-19 21:19:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:19:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:19:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1084 transitions. [2022-07-19 21:19:03,921 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9018302828618968 [2022-07-19 21:19:03,921 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1084 transitions. [2022-07-19 21:19:03,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1084 transitions. [2022-07-19 21:19:03,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:03,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1084 transitions. [2022-07-19 21:19:03,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 542.0) internal successors, (1084), 2 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:03,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 601.0) internal successors, (1803), 3 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:03,924 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 601.0) internal successors, (1803), 3 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:03,924 INFO L186 Difference]: Start difference. First operand has 534 places, 601 transitions, 1522 flow. Second operand 2 states and 1084 transitions. [2022-07-19 21:19:03,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 500 transitions, 1352 flow [2022-07-19 21:19:03,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 500 transitions, 1112 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:03,932 INFO L242 Difference]: Finished difference. Result has 534 places, 488 transitions, 1056 flow [2022-07-19 21:19:03,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1056, PETRI_PLACES=534, PETRI_TRANSITIONS=488} [2022-07-19 21:19:03,933 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 0 predicate places. [2022-07-19 21:19:03,933 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 488 transitions, 1056 flow [2022-07-19 21:19:03,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 484.5) internal successors, (969), 2 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:03,933 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:03,934 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:03,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-07-19 21:19:03,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:03,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:03,934 INFO L85 PathProgramCache]: Analyzing trace with hash 721388231, now seen corresponding path program 1 times [2022-07-19 21:19:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:03,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105200707] [2022-07-19 21:19:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:03,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:03,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:03,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105200707] [2022-07-19 21:19:03,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105200707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:03,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:03,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:03,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330226408] [2022-07-19 21:19:03,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:03,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:03,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:03,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:03,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:03,953 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 477 out of 601 [2022-07-19 21:19:03,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 488 transitions, 1056 flow. Second operand has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:03,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:03,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 477 of 601 [2022-07-19 21:19:03,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:04,295 INFO L129 PetriNetUnfolder]: 0/822 cut-off events. [2022-07-19 21:19:04,296 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-19 21:19:04,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 822 events. 0/822 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2782 event pairs, 0 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2022-07-19 21:19:04,298 INFO L132 encePairwiseOnDemand]: 598/601 looper letters, 25 selfloop transitions, 2 changer transitions 0/492 dead transitions. [2022-07-19 21:19:04,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 492 transitions, 1118 flow [2022-07-19 21:19:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1459 transitions. [2022-07-19 21:19:04,301 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8092068774265113 [2022-07-19 21:19:04,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1459 transitions. [2022-07-19 21:19:04,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1459 transitions. [2022-07-19 21:19:04,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:04,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1459 transitions. [2022-07-19 21:19:04,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 486.3333333333333) internal successors, (1459), 3 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,304 INFO L186 Difference]: Start difference. First operand has 534 places, 488 transitions, 1056 flow. Second operand 3 states and 1459 transitions. [2022-07-19 21:19:04,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 492 transitions, 1118 flow [2022-07-19 21:19:04,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 492 transitions, 1118 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:04,311 INFO L242 Difference]: Finished difference. Result has 525 places, 489 transitions, 1068 flow [2022-07-19 21:19:04,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1068, PETRI_PLACES=525, PETRI_TRANSITIONS=489} [2022-07-19 21:19:04,312 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, -9 predicate places. [2022-07-19 21:19:04,312 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 489 transitions, 1068 flow [2022-07-19 21:19:04,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:04,313 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] [2022-07-19 21:19:04,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-07-19 21:19:04,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:04,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1266935680, now seen corresponding path program 1 times [2022-07-19 21:19:04,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:04,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589067968] [2022-07-19 21:19:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:04,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:04,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589067968] [2022-07-19 21:19:04,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589067968] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430851281] [2022-07-19 21:19:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:04,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:04,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:04,372 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:04,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-19 21:19:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:04,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:04,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:04,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430851281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:04,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:04,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:04,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754829073] [2022-07-19 21:19:04,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:04,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:04,671 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-19 21:19:04,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 489 transitions, 1068 flow. Second operand has 10 states, 10 states have (on average 478.3) internal successors, (4783), 10 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:04,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-19 21:19:04,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:04,928 INFO L129 PetriNetUnfolder]: 0/796 cut-off events. [2022-07-19 21:19:04,929 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-19 21:19:04,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 796 events. 0/796 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2638 event pairs, 0 based on Foata normal form. 2/798 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-19 21:19:04,930 INFO L132 encePairwiseOnDemand]: 595/601 looper letters, 26 selfloop transitions, 9 changer transitions 0/499 dead transitions. [2022-07-19 21:19:04,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 499 transitions, 1160 flow [2022-07-19 21:19:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4321 transitions. [2022-07-19 21:19:04,933 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.798853762248105 [2022-07-19 21:19:04,933 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4321 transitions. [2022-07-19 21:19:04,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4321 transitions. [2022-07-19 21:19:04,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:04,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4321 transitions. [2022-07-19 21:19:04,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 480.1111111111111) internal successors, (4321), 9 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,939 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,939 INFO L186 Difference]: Start difference. First operand has 525 places, 489 transitions, 1068 flow. Second operand 9 states and 4321 transitions. [2022-07-19 21:19:04,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 499 transitions, 1160 flow [2022-07-19 21:19:04,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 499 transitions, 1158 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:04,945 INFO L242 Difference]: Finished difference. Result has 535 places, 495 transitions, 1116 flow [2022-07-19 21:19:04,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1116, PETRI_PLACES=535, PETRI_TRANSITIONS=495} [2022-07-19 21:19:04,946 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 1 predicate places. [2022-07-19 21:19:04,946 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 495 transitions, 1116 flow [2022-07-19 21:19:04,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 478.3) internal successors, (4783), 10 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,947 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:04,947 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] [2022-07-19 21:19:04,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:05,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-07-19 21:19:05,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:05,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash 567657013, now seen corresponding path program 1 times [2022-07-19 21:19:05,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:05,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139053255] [2022-07-19 21:19:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:05,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:05,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:05,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139053255] [2022-07-19 21:19:05,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139053255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:05,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117113401] [2022-07-19 21:19:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:05,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:05,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:05,205 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:05,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-19 21:19:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:05,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:05,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:05,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:05,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117113401] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:05,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:05,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:05,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007433662] [2022-07-19 21:19:05,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:05,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:05,581 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-19 21:19:05,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 495 transitions, 1116 flow. Second operand has 18 states, 18 states have (on average 478.6111111111111) internal successors, (8615), 18 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:05,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:05,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-19 21:19:05,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:05,947 INFO L129 PetriNetUnfolder]: 0/744 cut-off events. [2022-07-19 21:19:05,947 INFO L130 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-07-19 21:19:05,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 744 events. 0/744 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2286 event pairs, 0 based on Foata normal form. 4/748 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-19 21:19:05,949 INFO L132 encePairwiseOnDemand]: 595/601 looper letters, 34 selfloop transitions, 21 changer transitions 0/519 dead transitions. [2022-07-19 21:19:05,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 519 transitions, 1334 flow [2022-07-19 21:19:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10055 transitions. [2022-07-19 21:19:05,954 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7966880595832343 [2022-07-19 21:19:05,954 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10055 transitions. [2022-07-19 21:19:05,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10055 transitions. [2022-07-19 21:19:05,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:05,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10055 transitions. [2022-07-19 21:19:05,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 478.8095238095238) internal successors, (10055), 21 states have internal predecessors, (10055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:05,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 601.0) internal successors, (13222), 22 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:05,970 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 601.0) internal successors, (13222), 22 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:05,970 INFO L186 Difference]: Start difference. First operand has 535 places, 495 transitions, 1116 flow. Second operand 21 states and 10055 transitions. [2022-07-19 21:19:05,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 519 transitions, 1334 flow [2022-07-19 21:19:05,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 519 transitions, 1320 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:05,977 INFO L242 Difference]: Finished difference. Result has 559 places, 508 transitions, 1240 flow [2022-07-19 21:19:05,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1240, PETRI_PLACES=559, PETRI_TRANSITIONS=508} [2022-07-19 21:19:05,978 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 25 predicate places. [2022-07-19 21:19:05,978 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 508 transitions, 1240 flow [2022-07-19 21:19:05,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 478.6111111111111) internal successors, (8615), 18 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:05,979 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:05,979 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:05,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:06,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:06,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1105185707, now seen corresponding path program 1 times [2022-07-19 21:19:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:06,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363808022] [2022-07-19 21:19:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:06,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:06,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:06,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363808022] [2022-07-19 21:19:06,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363808022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:06,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510344303] [2022-07-19 21:19:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:06,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:06,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:06,352 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:06,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-19 21:19:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:06,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:06,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:06,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:06,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510344303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:06,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:06,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:06,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798550973] [2022-07-19 21:19:06,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:06,999 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-19 21:19:07,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 508 transitions, 1240 flow. Second operand has 34 states, 34 states have (on average 478.79411764705884) internal successors, (16279), 34 states have internal predecessors, (16279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:07,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:07,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-19 21:19:07,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:07,664 INFO L129 PetriNetUnfolder]: 0/640 cut-off events. [2022-07-19 21:19:07,664 INFO L130 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-07-19 21:19:07,664 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 640 events. 0/640 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1606 event pairs, 0 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-07-19 21:19:07,665 INFO L132 encePairwiseOnDemand]: 595/601 looper letters, 50 selfloop transitions, 45 changer transitions 0/559 dead transitions. [2022-07-19 21:19:07,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 559 transitions, 1746 flow [2022-07-19 21:19:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21523 transitions. [2022-07-19 21:19:07,675 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.795821778517286 [2022-07-19 21:19:07,675 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21523 transitions. [2022-07-19 21:19:07,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21523 transitions. [2022-07-19 21:19:07,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:07,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21523 transitions. [2022-07-19 21:19:07,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 478.2888888888889) internal successors, (21523), 45 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:07,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 601.0) internal successors, (27646), 46 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:07,709 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 601.0) internal successors, (27646), 46 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:07,709 INFO L186 Difference]: Start difference. First operand has 559 places, 508 transitions, 1240 flow. Second operand 45 states and 21523 transitions. [2022-07-19 21:19:07,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 559 transitions, 1746 flow [2022-07-19 21:19:07,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 559 transitions, 1706 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:07,717 INFO L242 Difference]: Finished difference. Result has 606 places, 533 transitions, 1518 flow [2022-07-19 21:19:07,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1518, PETRI_PLACES=606, PETRI_TRANSITIONS=533} [2022-07-19 21:19:07,718 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 72 predicate places. [2022-07-19 21:19:07,718 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 533 transitions, 1518 flow [2022-07-19 21:19:07,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 478.79411764705884) internal successors, (16279), 34 states have internal predecessors, (16279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:07,720 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:07,720 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:07,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:07,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-07-19 21:19:07,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2142953785, now seen corresponding path program 1 times [2022-07-19 21:19:07,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:07,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32420207] [2022-07-19 21:19:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:07,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:08,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32420207] [2022-07-19 21:19:08,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32420207] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411265226] [2022-07-19 21:19:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:08,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:08,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:08,280 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:08,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-19 21:19:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:08,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:08,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:08,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:09,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411265226] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:09,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:09,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:09,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777403852] [2022-07-19 21:19:09,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:09,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:09,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:09,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:09,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:09,557 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-19 21:19:09,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 533 transitions, 1518 flow. Second operand has 66 states, 66 states have (on average 478.8939393939394) internal successors, (31607), 66 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:09,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:09,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-19 21:19:09,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:10,366 INFO L129 PetriNetUnfolder]: 0/614 cut-off events. [2022-07-19 21:19:10,366 INFO L130 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-07-19 21:19:10,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 614 events. 0/614 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1463 event pairs, 0 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-07-19 21:19:10,368 INFO L132 encePairwiseOnDemand]: 596/601 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-07-19 21:19:10,368 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 552 transitions, 1852 flow [2022-07-19 21:19:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-19 21:19:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-19 21:19:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24378 transitions. [2022-07-19 21:19:10,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953410981697171 [2022-07-19 21:19:10,378 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24378 transitions. [2022-07-19 21:19:10,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24378 transitions. [2022-07-19 21:19:10,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:10,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24378 transitions. [2022-07-19 21:19:10,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 478.0) internal successors, (24378), 51 states have internal predecessors, (24378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:10,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 601.0) internal successors, (31252), 52 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:10,416 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 601.0) internal successors, (31252), 52 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:10,417 INFO L186 Difference]: Start difference. First operand has 606 places, 533 transitions, 1518 flow. Second operand 51 states and 24378 transitions. [2022-07-19 21:19:10,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 552 transitions, 1852 flow [2022-07-19 21:19:10,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:10,426 INFO L242 Difference]: Finished difference. Result has 610 places, 523 transitions, 1471 flow [2022-07-19 21:19:10,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1471, PETRI_PLACES=610, PETRI_TRANSITIONS=523} [2022-07-19 21:19:10,428 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 76 predicate places. [2022-07-19 21:19:10,428 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 523 transitions, 1471 flow [2022-07-19 21:19:10,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 478.8939393939394) internal successors, (31607), 66 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:10,432 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:10,432 INFO L200 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:10,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-19 21:19:10,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-07-19 21:19:10,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:10,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash -823919421, now seen corresponding path program 1 times [2022-07-19 21:19:10,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:10,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726302347] [2022-07-19 21:19:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:10,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:10,660 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:10,686 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:10,686 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:10,686 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:10,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:10,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-07-19 21:19:10,687 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:10,687 WARN L231 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:10,687 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-07-19 21:19:10,717 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:10,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 563 places, 634 transitions, 1625 flow [2022-07-19 21:19:10,990 INFO L129 PetriNetUnfolder]: 174/1292 cut-off events. [2022-07-19 21:19:10,990 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-19 21:19:11,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 1292 events. 174/1292 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4858 event pairs, 0 based on Foata normal form. 0/1082 useless extension candidates. Maximal degree in co-relation 1377. Up to 36 conditions per place. [2022-07-19 21:19:11,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 563 places, 634 transitions, 1625 flow [2022-07-19 21:19:11,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 563 places, 634 transitions, 1625 flow [2022-07-19 21:19:11,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:11,069 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:19:11,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:11,072 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2022-07-19 21:19:11,073 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:11,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:11,073 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:11,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:11,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:11,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1714884999, now seen corresponding path program 1 times [2022-07-19 21:19:11,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:11,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822823065] [2022-07-19 21:19:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:11,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:11,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:11,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822823065] [2022-07-19 21:19:11,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822823065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:11,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:11,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:11,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724089351] [2022-07-19 21:19:11,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:11,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:11,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:11,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:11,105 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 634 [2022-07-19 21:19:11,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 634 transitions, 1625 flow. Second operand has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:11,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:11,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 634 [2022-07-19 21:19:11,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:11,436 INFO L129 PetriNetUnfolder]: 0/1075 cut-off events. [2022-07-19 21:19:11,436 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-19 21:19:11,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1387 conditions, 1075 events. 0/1075 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4417 event pairs, 0 based on Foata normal form. 4903/5944 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2022-07-19 21:19:11,438 INFO L132 encePairwiseOnDemand]: 525/634 looper letters, 26 selfloop transitions, 2 changer transitions 12/531 dead transitions. [2022-07-19 21:19:11,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 531 transitions, 1475 flow [2022-07-19 21:19:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1651 transitions. [2022-07-19 21:19:11,440 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8680336487907466 [2022-07-19 21:19:11,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1651 transitions. [2022-07-19 21:19:11,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1651 transitions. [2022-07-19 21:19:11,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:11,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1651 transitions. [2022-07-19 21:19:11,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 550.3333333333334) internal successors, (1651), 3 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:11,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:11,442 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:11,442 INFO L186 Difference]: Start difference. First operand has 563 places, 634 transitions, 1625 flow. Second operand 3 states and 1651 transitions. [2022-07-19 21:19:11,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 531 transitions, 1475 flow [2022-07-19 21:19:11,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 531 transitions, 1203 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:11,449 INFO L242 Difference]: Finished difference. Result has 565 places, 516 transitions, 1127 flow [2022-07-19 21:19:11,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1127, PETRI_PLACES=565, PETRI_TRANSITIONS=516} [2022-07-19 21:19:11,449 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 2 predicate places. [2022-07-19 21:19:11,449 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 516 transitions, 1127 flow [2022-07-19 21:19:11,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:11,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:11,452 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] [2022-07-19 21:19:11,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-07-19 21:19:11,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:11,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:11,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1508779104, now seen corresponding path program 1 times [2022-07-19 21:19:11,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:11,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592421597] [2022-07-19 21:19:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:11,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:11,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:11,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592421597] [2022-07-19 21:19:11,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592421597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715959566] [2022-07-19 21:19:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:11,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:11,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:11,474 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:11,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-19 21:19:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:11,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:11,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:11,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:11,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715959566] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:11,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:11,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102933212] [2022-07-19 21:19:11,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:11,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:11,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:11,822 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-19 21:19:11,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 516 transitions, 1127 flow. Second operand has 10 states, 10 states have (on average 504.3) internal successors, (5043), 10 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:11,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:11,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-19 21:19:11,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:12,115 INFO L129 PetriNetUnfolder]: 0/845 cut-off events. [2022-07-19 21:19:12,116 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:19:12,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 845 events. 0/845 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2812 event pairs, 0 based on Foata normal form. 2/847 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-19 21:19:12,117 INFO L132 encePairwiseOnDemand]: 628/634 looper letters, 27 selfloop transitions, 9 changer transitions 0/526 dead transitions. [2022-07-19 21:19:12,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 526 transitions, 1221 flow [2022-07-19 21:19:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:12,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4556 transitions. [2022-07-19 21:19:12,120 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7984577637574483 [2022-07-19 21:19:12,120 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4556 transitions. [2022-07-19 21:19:12,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4556 transitions. [2022-07-19 21:19:12,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:12,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4556 transitions. [2022-07-19 21:19:12,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 506.22222222222223) internal successors, (4556), 9 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:12,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:12,126 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:12,126 INFO L186 Difference]: Start difference. First operand has 565 places, 516 transitions, 1127 flow. Second operand 9 states and 4556 transitions. [2022-07-19 21:19:12,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 526 transitions, 1221 flow [2022-07-19 21:19:12,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 526 transitions, 1219 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:12,133 INFO L242 Difference]: Finished difference. Result has 563 places, 522 transitions, 1175 flow [2022-07-19 21:19:12,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1175, PETRI_PLACES=563, PETRI_TRANSITIONS=522} [2022-07-19 21:19:12,133 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 0 predicate places. [2022-07-19 21:19:12,133 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 522 transitions, 1175 flow [2022-07-19 21:19:12,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 504.3) internal successors, (5043), 10 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:12,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:12,134 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] [2022-07-19 21:19:12,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:12,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:12,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:12,354 INFO L85 PathProgramCache]: Analyzing trace with hash -587987435, now seen corresponding path program 1 times [2022-07-19 21:19:12,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:12,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667842544] [2022-07-19 21:19:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:12,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667842544] [2022-07-19 21:19:12,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667842544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:12,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116427839] [2022-07-19 21:19:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:12,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:12,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:12,402 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:12,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-19 21:19:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:12,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:12,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:12,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116427839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:12,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:12,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048420426] [2022-07-19 21:19:12,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:12,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:12,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:12,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-19 21:19:12,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 522 transitions, 1175 flow. Second operand has 18 states, 18 states have (on average 504.6111111111111) internal successors, (9083), 18 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:12,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:12,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-19 21:19:12,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:13,266 INFO L129 PetriNetUnfolder]: 0/793 cut-off events. [2022-07-19 21:19:13,266 INFO L130 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-07-19 21:19:13,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 793 events. 0/793 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2472 event pairs, 0 based on Foata normal form. 4/797 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-19 21:19:13,267 INFO L132 encePairwiseOnDemand]: 628/634 looper letters, 35 selfloop transitions, 21 changer transitions 0/546 dead transitions. [2022-07-19 21:19:13,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 546 transitions, 1395 flow [2022-07-19 21:19:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:13,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10602 transitions. [2022-07-19 21:19:13,272 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7963046417305092 [2022-07-19 21:19:13,272 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10602 transitions. [2022-07-19 21:19:13,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10602 transitions. [2022-07-19 21:19:13,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:13,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10602 transitions. [2022-07-19 21:19:13,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 504.85714285714283) internal successors, (10602), 21 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:13,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 634.0) internal successors, (13948), 22 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:13,286 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 634.0) internal successors, (13948), 22 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:13,286 INFO L186 Difference]: Start difference. First operand has 563 places, 522 transitions, 1175 flow. Second operand 21 states and 10602 transitions. [2022-07-19 21:19:13,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 546 transitions, 1395 flow [2022-07-19 21:19:13,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 546 transitions, 1381 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:13,293 INFO L242 Difference]: Finished difference. Result has 587 places, 535 transitions, 1299 flow [2022-07-19 21:19:13,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1299, PETRI_PLACES=587, PETRI_TRANSITIONS=535} [2022-07-19 21:19:13,294 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 24 predicate places. [2022-07-19 21:19:13,294 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 535 transitions, 1299 flow [2022-07-19 21:19:13,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 504.6111111111111) internal successors, (9083), 18 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:13,295 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:13,295 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:13,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-19 21:19:13,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-07-19 21:19:13,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash -819498741, now seen corresponding path program 1 times [2022-07-19 21:19:13,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:13,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508382998] [2022-07-19 21:19:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:13,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:13,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508382998] [2022-07-19 21:19:13,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508382998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967475244] [2022-07-19 21:19:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:13,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:13,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:13,668 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:13,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-19 21:19:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:13,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:13,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:14,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:14,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967475244] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:14,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:14,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:14,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773125630] [2022-07-19 21:19:14,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:14,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:14,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:14,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:14,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:14,348 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-19 21:19:14,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 535 transitions, 1299 flow. Second operand has 34 states, 34 states have (on average 504.79411764705884) internal successors, (17163), 34 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:14,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-19 21:19:14,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:14,994 INFO L129 PetriNetUnfolder]: 0/689 cut-off events. [2022-07-19 21:19:14,994 INFO L130 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-07-19 21:19:14,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 689 events. 0/689 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1791 event pairs, 0 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-19 21:19:14,995 INFO L132 encePairwiseOnDemand]: 628/634 looper letters, 51 selfloop transitions, 45 changer transitions 0/586 dead transitions. [2022-07-19 21:19:14,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 586 transitions, 1807 flow [2022-07-19 21:19:14,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22694 transitions. [2022-07-19 21:19:15,006 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954433929197336 [2022-07-19 21:19:15,006 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22694 transitions. [2022-07-19 21:19:15,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22694 transitions. [2022-07-19 21:19:15,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:15,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22694 transitions. [2022-07-19 21:19:15,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 504.31111111111113) internal successors, (22694), 45 states have internal predecessors, (22694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:15,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 634.0) internal successors, (29164), 46 states have internal predecessors, (29164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:15,041 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 634.0) internal successors, (29164), 46 states have internal predecessors, (29164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:15,041 INFO L186 Difference]: Start difference. First operand has 587 places, 535 transitions, 1299 flow. Second operand 45 states and 22694 transitions. [2022-07-19 21:19:15,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 586 transitions, 1807 flow [2022-07-19 21:19:15,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 586 transitions, 1767 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:15,050 INFO L242 Difference]: Finished difference. Result has 634 places, 560 transitions, 1577 flow [2022-07-19 21:19:15,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1577, PETRI_PLACES=634, PETRI_TRANSITIONS=560} [2022-07-19 21:19:15,051 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 71 predicate places. [2022-07-19 21:19:15,051 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 560 transitions, 1577 flow [2022-07-19 21:19:15,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 504.79411764705884) internal successors, (17163), 34 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:15,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:15,053 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:15,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:15,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:15,267 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1853815001, now seen corresponding path program 1 times [2022-07-19 21:19:15,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:15,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988114313] [2022-07-19 21:19:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:15,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:15,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988114313] [2022-07-19 21:19:15,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988114313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:15,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351933025] [2022-07-19 21:19:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:15,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:15,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:15,609 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:15,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-19 21:19:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:15,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:15,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:16,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:16,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351933025] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:16,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:16,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:16,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838800043] [2022-07-19 21:19:16,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:16,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:16,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:16,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:16,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:16,866 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-19 21:19:16,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 560 transitions, 1577 flow. Second operand has 66 states, 66 states have (on average 504.8939393939394) internal successors, (33323), 66 states have internal predecessors, (33323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:16,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:16,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-19 21:19:16,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:17,570 INFO L129 PetriNetUnfolder]: 0/650 cut-off events. [2022-07-19 21:19:17,571 INFO L130 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-07-19 21:19:17,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 650 events. 0/650 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1561 event pairs, 0 based on Foata normal form. 3/653 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-19 21:19:17,572 INFO L132 encePairwiseOnDemand]: 629/634 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-07-19 21:19:17,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 584 transitions, 1967 flow [2022-07-19 21:19:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 21:19:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-19 21:19:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27217 transitions. [2022-07-19 21:19:17,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7949818904077579 [2022-07-19 21:19:17,584 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27217 transitions. [2022-07-19 21:19:17,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27217 transitions. [2022-07-19 21:19:17,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:17,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27217 transitions. [2022-07-19 21:19:17,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 504.01851851851853) internal successors, (27217), 54 states have internal predecessors, (27217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:17,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 634.0) internal successors, (34870), 55 states have internal predecessors, (34870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:17,628 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 634.0) internal successors, (34870), 55 states have internal predecessors, (34870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:17,629 INFO L186 Difference]: Start difference. First operand has 634 places, 560 transitions, 1577 flow. Second operand 54 states and 27217 transitions. [2022-07-19 21:19:17,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 584 transitions, 1967 flow [2022-07-19 21:19:17,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:17,638 INFO L242 Difference]: Finished difference. Result has 641 places, 553 transitions, 1559 flow [2022-07-19 21:19:17,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1559, PETRI_PLACES=641, PETRI_TRANSITIONS=553} [2022-07-19 21:19:17,639 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 78 predicate places. [2022-07-19 21:19:17,640 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 553 transitions, 1559 flow [2022-07-19 21:19:17,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 504.8939393939394) internal successors, (33323), 66 states have internal predecessors, (33323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:17,643 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:17,643 INFO L200 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:17,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:17,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:17,862 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:17,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1613944372, now seen corresponding path program 1 times [2022-07-19 21:19:17,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:17,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213251073] [2022-07-19 21:19:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:17,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:17,891 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:17,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:17,920 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:17,920 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:17,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:17,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-07-19 21:19:17,921 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:19:17,921 WARN L231 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:17,921 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-07-19 21:19:17,950 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:17,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 592 places, 667 transitions, 1730 flow [2022-07-19 21:19:18,300 INFO L129 PetriNetUnfolder]: 184/1364 cut-off events. [2022-07-19 21:19:18,301 INFO L130 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-07-19 21:19:18,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1590 conditions, 1364 events. 184/1364 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5129 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 1469. Up to 38 conditions per place. [2022-07-19 21:19:18,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 592 places, 667 transitions, 1730 flow [2022-07-19 21:19:18,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 592 places, 667 transitions, 1730 flow [2022-07-19 21:19:18,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:18,390 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:19:18,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:18,393 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-19 21:19:18,393 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:18,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:18,394 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:18,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash 445354150, now seen corresponding path program 1 times [2022-07-19 21:19:18,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:18,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812906792] [2022-07-19 21:19:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:18,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:18,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:18,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812906792] [2022-07-19 21:19:18,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812906792] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:18,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:18,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:19:18,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926098399] [2022-07-19 21:19:18,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:18,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:19:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:19:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:19:18,406 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 667 [2022-07-19 21:19:18,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 667 transitions, 1730 flow. Second operand has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:18,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 667 [2022-07-19 21:19:18,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:18,803 INFO L129 PetriNetUnfolder]: 0/1161 cut-off events. [2022-07-19 21:19:18,803 INFO L130 PetriNetUnfolder]: For 1293/1293 co-relation queries the response was YES. [2022-07-19 21:19:18,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1406 conditions, 1161 events. 0/1161 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4832 event pairs, 0 based on Foata normal form. 1002/2125 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-19 21:19:18,805 INFO L132 encePairwiseOnDemand]: 555/667 looper letters, 18 selfloop transitions, 0 changer transitions 12/554 dead transitions. [2022-07-19 21:19:18,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 554 transitions, 1540 flow [2022-07-19 21:19:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:19:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:19:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1202 transitions. [2022-07-19 21:19:18,807 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9010494752623688 [2022-07-19 21:19:18,807 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1202 transitions. [2022-07-19 21:19:18,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1202 transitions. [2022-07-19 21:19:18,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:18,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1202 transitions. [2022-07-19 21:19:18,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 601.0) internal successors, (1202), 2 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 667.0) internal successors, (2001), 3 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,810 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 667.0) internal successors, (2001), 3 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,810 INFO L186 Difference]: Start difference. First operand has 592 places, 667 transitions, 1730 flow. Second operand 2 states and 1202 transitions. [2022-07-19 21:19:18,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 554 transitions, 1540 flow [2022-07-19 21:19:18,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 554 transitions, 1234 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:18,818 INFO L242 Difference]: Finished difference. Result has 592 places, 542 transitions, 1174 flow [2022-07-19 21:19:18,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1174, PETRI_PLACES=592, PETRI_TRANSITIONS=542} [2022-07-19 21:19:18,818 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 0 predicate places. [2022-07-19 21:19:18,818 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 542 transitions, 1174 flow [2022-07-19 21:19:18,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,819 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:18,819 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:18,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-07-19 21:19:18,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash 151951143, now seen corresponding path program 1 times [2022-07-19 21:19:18,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:18,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931568915] [2022-07-19 21:19:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:18,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:18,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:18,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931568915] [2022-07-19 21:19:18,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931568915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:18,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:18,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:18,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183515356] [2022-07-19 21:19:18,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:18,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:18,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:18,835 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 667 [2022-07-19 21:19:18,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 542 transitions, 1174 flow. Second operand has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:18,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 667 [2022-07-19 21:19:18,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:19,099 INFO L129 PetriNetUnfolder]: 0/920 cut-off events. [2022-07-19 21:19:19,100 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-19 21:19:19,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 920 events. 0/920 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3161 event pairs, 0 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2022-07-19 21:19:19,101 INFO L132 encePairwiseOnDemand]: 664/667 looper letters, 27 selfloop transitions, 2 changer transitions 0/546 dead transitions. [2022-07-19 21:19:19,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 546 transitions, 1240 flow [2022-07-19 21:19:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1617 transitions. [2022-07-19 21:19:19,103 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.808095952023988 [2022-07-19 21:19:19,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1617 transitions. [2022-07-19 21:19:19,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1617 transitions. [2022-07-19 21:19:19,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:19,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1617 transitions. [2022-07-19 21:19:19,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 539.0) internal successors, (1617), 3 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:19,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:19,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:19,106 INFO L186 Difference]: Start difference. First operand has 592 places, 542 transitions, 1174 flow. Second operand 3 states and 1617 transitions. [2022-07-19 21:19:19,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 546 transitions, 1240 flow [2022-07-19 21:19:19,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 546 transitions, 1240 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:19,111 INFO L242 Difference]: Finished difference. Result has 583 places, 543 transitions, 1186 flow [2022-07-19 21:19:19,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1186, PETRI_PLACES=583, PETRI_TRANSITIONS=543} [2022-07-19 21:19:19,112 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, -9 predicate places. [2022-07-19 21:19:19,112 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 543 transitions, 1186 flow [2022-07-19 21:19:19,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:19,112 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:19,112 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] [2022-07-19 21:19:19,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-07-19 21:19:19,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1519862336, now seen corresponding path program 1 times [2022-07-19 21:19:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:19,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391595242] [2022-07-19 21:19:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:19,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:19,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:19,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391595242] [2022-07-19 21:19:19,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391595242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:19,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854905392] [2022-07-19 21:19:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:19,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:19,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:19,134 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:19,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-19 21:19:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:19,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:19,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854905392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:19,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:19,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:19,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431928907] [2022-07-19 21:19:19,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:19,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:19,496 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-19 21:19:19,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 543 transitions, 1186 flow. Second operand has 10 states, 10 states have (on average 530.3) internal successors, (5303), 10 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:19,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:19,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-19 21:19:19,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:19,802 INFO L129 PetriNetUnfolder]: 0/894 cut-off events. [2022-07-19 21:19:19,802 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-19 21:19:19,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 894 events. 0/894 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3002 event pairs, 0 based on Foata normal form. 2/896 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-19 21:19:19,804 INFO L132 encePairwiseOnDemand]: 661/667 looper letters, 28 selfloop transitions, 9 changer transitions 0/553 dead transitions. [2022-07-19 21:19:19,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 553 transitions, 1282 flow [2022-07-19 21:19:19,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4791 transitions. [2022-07-19 21:19:19,806 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7981009495252374 [2022-07-19 21:19:19,806 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4791 transitions. [2022-07-19 21:19:19,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4791 transitions. [2022-07-19 21:19:19,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:19,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4791 transitions. [2022-07-19 21:19:19,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 532.3333333333334) internal successors, (4791), 9 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:19,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 667.0) internal successors, (6670), 10 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:19,812 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 667.0) internal successors, (6670), 10 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:19,812 INFO L186 Difference]: Start difference. First operand has 583 places, 543 transitions, 1186 flow. Second operand 9 states and 4791 transitions. [2022-07-19 21:19:19,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 553 transitions, 1282 flow [2022-07-19 21:19:19,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 553 transitions, 1280 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:19,818 INFO L242 Difference]: Finished difference. Result has 593 places, 549 transitions, 1234 flow [2022-07-19 21:19:19,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1234, PETRI_PLACES=593, PETRI_TRANSITIONS=549} [2022-07-19 21:19:19,819 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 1 predicate places. [2022-07-19 21:19:19,819 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 549 transitions, 1234 flow [2022-07-19 21:19:19,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 530.3) internal successors, (5303), 10 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:19,820 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:19,820 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] [2022-07-19 21:19:19,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:20,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-07-19 21:19:20,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:20,033 INFO L85 PathProgramCache]: Analyzing trace with hash 418737845, now seen corresponding path program 1 times [2022-07-19 21:19:20,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:20,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682912772] [2022-07-19 21:19:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:20,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:20,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:20,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682912772] [2022-07-19 21:19:20,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682912772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303867426] [2022-07-19 21:19:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:20,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:20,095 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:20,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-19 21:19:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:20,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:20,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:20,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:20,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303867426] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:20,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:20,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:20,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462033865] [2022-07-19 21:19:20,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:20,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:20,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:20,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:20,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:20,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-19 21:19:20,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 549 transitions, 1234 flow. Second operand has 18 states, 18 states have (on average 530.6111111111111) internal successors, (9551), 18 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:20,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:20,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-19 21:19:20,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:20,952 INFO L129 PetriNetUnfolder]: 0/842 cut-off events. [2022-07-19 21:19:20,952 INFO L130 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-07-19 21:19:20,953 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 842 events. 0/842 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2655 event pairs, 0 based on Foata normal form. 4/846 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-19 21:19:20,954 INFO L132 encePairwiseOnDemand]: 661/667 looper letters, 36 selfloop transitions, 21 changer transitions 0/573 dead transitions. [2022-07-19 21:19:20,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 573 transitions, 1456 flow [2022-07-19 21:19:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11149 transitions. [2022-07-19 21:19:20,959 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959591632755051 [2022-07-19 21:19:20,959 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11149 transitions. [2022-07-19 21:19:20,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11149 transitions. [2022-07-19 21:19:20,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:20,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11149 transitions. [2022-07-19 21:19:20,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 530.9047619047619) internal successors, (11149), 21 states have internal predecessors, (11149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:20,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 667.0) internal successors, (14674), 22 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:20,972 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 667.0) internal successors, (14674), 22 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:20,972 INFO L186 Difference]: Start difference. First operand has 593 places, 549 transitions, 1234 flow. Second operand 21 states and 11149 transitions. [2022-07-19 21:19:20,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 573 transitions, 1456 flow [2022-07-19 21:19:20,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 573 transitions, 1442 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:20,980 INFO L242 Difference]: Finished difference. Result has 617 places, 562 transitions, 1358 flow [2022-07-19 21:19:20,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1358, PETRI_PLACES=617, PETRI_TRANSITIONS=562} [2022-07-19 21:19:20,980 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 25 predicate places. [2022-07-19 21:19:20,980 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 562 transitions, 1358 flow [2022-07-19 21:19:20,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 530.6111111111111) internal successors, (9551), 18 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:20,981 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:20,982 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:21,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:21,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-07-19 21:19:21,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:21,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:21,199 INFO L85 PathProgramCache]: Analyzing trace with hash -899555925, now seen corresponding path program 1 times [2022-07-19 21:19:21,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:21,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821742417] [2022-07-19 21:19:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:21,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:21,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:21,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821742417] [2022-07-19 21:19:21,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821742417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:21,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769137706] [2022-07-19 21:19:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:21,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:21,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:21,357 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:21,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-19 21:19:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:21,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:21,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:21,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:21,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769137706] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:21,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:21,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:21,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807545241] [2022-07-19 21:19:21,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:21,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:21,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:21,960 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-19 21:19:21,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 562 transitions, 1358 flow. Second operand has 34 states, 34 states have (on average 530.7941176470588) internal successors, (18047), 34 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:21,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:21,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-19 21:19:21,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:22,600 INFO L129 PetriNetUnfolder]: 0/738 cut-off events. [2022-07-19 21:19:22,600 INFO L130 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-07-19 21:19:22,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 738 events. 0/738 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1975 event pairs, 0 based on Foata normal form. 8/746 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-07-19 21:19:22,602 INFO L132 encePairwiseOnDemand]: 661/667 looper letters, 52 selfloop transitions, 45 changer transitions 0/613 dead transitions. [2022-07-19 21:19:22,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 613 transitions, 1868 flow [2022-07-19 21:19:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23865 transitions. [2022-07-19 21:19:22,612 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951024487756122 [2022-07-19 21:19:22,613 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23865 transitions. [2022-07-19 21:19:22,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23865 transitions. [2022-07-19 21:19:22,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:22,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23865 transitions. [2022-07-19 21:19:22,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 530.3333333333334) internal successors, (23865), 45 states have internal predecessors, (23865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:22,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 667.0) internal successors, (30682), 46 states have internal predecessors, (30682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:22,652 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 667.0) internal successors, (30682), 46 states have internal predecessors, (30682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:22,653 INFO L186 Difference]: Start difference. First operand has 617 places, 562 transitions, 1358 flow. Second operand 45 states and 23865 transitions. [2022-07-19 21:19:22,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 613 transitions, 1868 flow [2022-07-19 21:19:22,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 613 transitions, 1828 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:22,662 INFO L242 Difference]: Finished difference. Result has 664 places, 587 transitions, 1636 flow [2022-07-19 21:19:22,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1636, PETRI_PLACES=664, PETRI_TRANSITIONS=587} [2022-07-19 21:19:22,663 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 72 predicate places. [2022-07-19 21:19:22,663 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 587 transitions, 1636 flow [2022-07-19 21:19:22,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 530.7941176470588) internal successors, (18047), 34 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:22,665 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:22,665 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:22,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:22,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:22,885 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash 707886023, now seen corresponding path program 1 times [2022-07-19 21:19:22,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:22,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339507043] [2022-07-19 21:19:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:22,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:23,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:23,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339507043] [2022-07-19 21:19:23,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339507043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:23,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170818114] [2022-07-19 21:19:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:23,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:23,209 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:23,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-19 21:19:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:23,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:23,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:24,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170818114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:24,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:24,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:24,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114005324] [2022-07-19 21:19:24,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:24,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:24,397 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-19 21:19:24,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 587 transitions, 1636 flow. Second operand has 66 states, 66 states have (on average 530.8939393939394) internal successors, (35039), 66 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:24,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:24,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-19 21:19:24,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:25,300 INFO L129 PetriNetUnfolder]: 0/686 cut-off events. [2022-07-19 21:19:25,300 INFO L130 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-07-19 21:19:25,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 686 events. 0/686 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1659 event pairs, 0 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-07-19 21:19:25,301 INFO L132 encePairwiseOnDemand]: 662/667 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-07-19 21:19:25,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 616 transitions, 2082 flow [2022-07-19 21:19:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-19 21:19:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-07-19 21:19:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30212 transitions. [2022-07-19 21:19:25,314 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946553039269839 [2022-07-19 21:19:25,315 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30212 transitions. [2022-07-19 21:19:25,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30212 transitions. [2022-07-19 21:19:25,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:25,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30212 transitions. [2022-07-19 21:19:25,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 530.0350877192982) internal successors, (30212), 57 states have internal predecessors, (30212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:25,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 667.0) internal successors, (38686), 58 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:25,364 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 667.0) internal successors, (38686), 58 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:25,364 INFO L186 Difference]: Start difference. First operand has 664 places, 587 transitions, 1636 flow. Second operand 57 states and 30212 transitions. [2022-07-19 21:19:25,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 616 transitions, 2082 flow [2022-07-19 21:19:25,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:25,374 INFO L242 Difference]: Finished difference. Result has 674 places, 583 transitions, 1647 flow [2022-07-19 21:19:25,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1647, PETRI_PLACES=674, PETRI_TRANSITIONS=583} [2022-07-19 21:19:25,374 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 82 predicate places. [2022-07-19 21:19:25,375 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 583 transitions, 1647 flow [2022-07-19 21:19:25,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 530.8939393939394) internal successors, (35039), 66 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:25,378 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:25,378 INFO L200 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:25,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:25,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:25,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:25,594 INFO L85 PathProgramCache]: Analyzing trace with hash 540044470, now seen corresponding path program 1 times [2022-07-19 21:19:25,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:25,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864074184] [2022-07-19 21:19:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:25,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:25,616 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:25,651 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:25,652 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:25,652 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:25,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:25,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-07-19 21:19:25,652 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:25,652 WARN L231 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:25,652 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-07-19 21:19:25,686 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:25,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 621 places, 700 transitions, 1837 flow [2022-07-19 21:19:26,041 INFO L129 PetriNetUnfolder]: 194/1436 cut-off events. [2022-07-19 21:19:26,041 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-19 21:19:26,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1684 conditions, 1436 events. 194/1436 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5451 event pairs, 0 based on Foata normal form. 0/1202 useless extension candidates. Maximal degree in co-relation 1562. Up to 40 conditions per place. [2022-07-19 21:19:26,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 621 places, 700 transitions, 1837 flow [2022-07-19 21:19:26,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 621 places, 700 transitions, 1837 flow [2022-07-19 21:19:26,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:26,139 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:19:26,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:26,143 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2022-07-19 21:19:26,143 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:26,143 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:26,143 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:26,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash 327553959, now seen corresponding path program 1 times [2022-07-19 21:19:26,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:26,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524989657] [2022-07-19 21:19:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:26,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:26,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:26,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524989657] [2022-07-19 21:19:26,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524989657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:26,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:26,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:26,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225506584] [2022-07-19 21:19:26,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:26,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:26,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:26,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:26,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:26,177 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 555 out of 700 [2022-07-19 21:19:26,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 700 transitions, 1837 flow. Second operand has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:26,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:26,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 555 of 700 [2022-07-19 21:19:26,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:26,593 INFO L129 PetriNetUnfolder]: 0/1197 cut-off events. [2022-07-19 21:19:26,594 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-19 21:19:26,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 1197 events. 0/1197 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4960 event pairs, 0 based on Foata normal form. 6162/7321 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2022-07-19 21:19:26,596 INFO L132 encePairwiseOnDemand]: 579/700 looper letters, 28 selfloop transitions, 2 changer transitions 12/585 dead transitions. [2022-07-19 21:19:26,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 585 transitions, 1667 flow [2022-07-19 21:19:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1821 transitions. [2022-07-19 21:19:26,597 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8671428571428571 [2022-07-19 21:19:26,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1821 transitions. [2022-07-19 21:19:26,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1821 transitions. [2022-07-19 21:19:26,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:26,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1821 transitions. [2022-07-19 21:19:26,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 607.0) internal successors, (1821), 3 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:26,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 700.0) internal successors, (2800), 4 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:26,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 700.0) internal successors, (2800), 4 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:26,600 INFO L186 Difference]: Start difference. First operand has 621 places, 700 transitions, 1837 flow. Second operand 3 states and 1821 transitions. [2022-07-19 21:19:26,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 585 transitions, 1667 flow [2022-07-19 21:19:26,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 585 transitions, 1325 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:26,608 INFO L242 Difference]: Finished difference. Result has 623 places, 570 transitions, 1245 flow [2022-07-19 21:19:26,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1245, PETRI_PLACES=623, PETRI_TRANSITIONS=570} [2022-07-19 21:19:26,608 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 2 predicate places. [2022-07-19 21:19:26,608 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 570 transitions, 1245 flow [2022-07-19 21:19:26,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:26,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:26,609 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] [2022-07-19 21:19:26,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-07-19 21:19:26,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:26,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:26,609 INFO L85 PathProgramCache]: Analyzing trace with hash -770945952, now seen corresponding path program 1 times [2022-07-19 21:19:26,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:26,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399737387] [2022-07-19 21:19:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:26,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:26,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:26,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399737387] [2022-07-19 21:19:26,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399737387] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:26,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781699260] [2022-07-19 21:19:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:26,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:26,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:26,631 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:26,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-19 21:19:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:26,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:26,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:27,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781699260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:27,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:27,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:27,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120222056] [2022-07-19 21:19:27,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:27,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:27,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:27,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:27,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:27,026 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-19 21:19:27,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 570 transitions, 1245 flow. Second operand has 10 states, 10 states have (on average 556.3) internal successors, (5563), 10 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:27,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:27,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-19 21:19:27,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:27,388 INFO L129 PetriNetUnfolder]: 0/943 cut-off events. [2022-07-19 21:19:27,388 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-19 21:19:27,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 943 events. 0/943 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3190 event pairs, 0 based on Foata normal form. 2/945 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-19 21:19:27,390 INFO L132 encePairwiseOnDemand]: 694/700 looper letters, 29 selfloop transitions, 9 changer transitions 0/580 dead transitions. [2022-07-19 21:19:27,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 580 transitions, 1343 flow [2022-07-19 21:19:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5026 transitions. [2022-07-19 21:19:27,393 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7977777777777778 [2022-07-19 21:19:27,393 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5026 transitions. [2022-07-19 21:19:27,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5026 transitions. [2022-07-19 21:19:27,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:27,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5026 transitions. [2022-07-19 21:19:27,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 558.4444444444445) internal successors, (5026), 9 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:27,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 700.0) internal successors, (7000), 10 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:27,399 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 700.0) internal successors, (7000), 10 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:27,399 INFO L186 Difference]: Start difference. First operand has 623 places, 570 transitions, 1245 flow. Second operand 9 states and 5026 transitions. [2022-07-19 21:19:27,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 580 transitions, 1343 flow [2022-07-19 21:19:27,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 580 transitions, 1341 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:27,406 INFO L242 Difference]: Finished difference. Result has 621 places, 576 transitions, 1293 flow [2022-07-19 21:19:27,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=621, PETRI_TRANSITIONS=576} [2022-07-19 21:19:27,407 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 0 predicate places. [2022-07-19 21:19:27,407 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 576 transitions, 1293 flow [2022-07-19 21:19:27,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 556.3) internal successors, (5563), 10 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:27,408 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:27,408 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] [2022-07-19 21:19:27,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:27,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:27,626 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:27,626 INFO L85 PathProgramCache]: Analyzing trace with hash -707134443, now seen corresponding path program 1 times [2022-07-19 21:19:27,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:27,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952640753] [2022-07-19 21:19:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:27,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:27,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:27,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952640753] [2022-07-19 21:19:27,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952640753] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:27,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815842229] [2022-07-19 21:19:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:27,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:27,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:27,669 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:27,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-19 21:19:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:28,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:28,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:28,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815842229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:28,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:28,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:28,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853836296] [2022-07-19 21:19:28,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:28,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:28,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:28,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:28,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:28,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-19 21:19:28,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 576 transitions, 1293 flow. Second operand has 18 states, 18 states have (on average 556.6111111111111) internal successors, (10019), 18 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:28,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:28,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-19 21:19:28,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:28,655 INFO L129 PetriNetUnfolder]: 0/891 cut-off events. [2022-07-19 21:19:28,656 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-07-19 21:19:28,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 891 events. 0/891 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2837 event pairs, 0 based on Foata normal form. 4/895 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-19 21:19:28,658 INFO L132 encePairwiseOnDemand]: 694/700 looper letters, 37 selfloop transitions, 21 changer transitions 0/600 dead transitions. [2022-07-19 21:19:28,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 600 transitions, 1517 flow [2022-07-19 21:19:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11696 transitions. [2022-07-19 21:19:28,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956462585034013 [2022-07-19 21:19:28,665 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11696 transitions. [2022-07-19 21:19:28,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11696 transitions. [2022-07-19 21:19:28,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:28,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11696 transitions. [2022-07-19 21:19:28,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 556.952380952381) internal successors, (11696), 21 states have internal predecessors, (11696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:28,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 700.0) internal successors, (15400), 22 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:28,684 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 700.0) internal successors, (15400), 22 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:28,684 INFO L186 Difference]: Start difference. First operand has 621 places, 576 transitions, 1293 flow. Second operand 21 states and 11696 transitions. [2022-07-19 21:19:28,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 600 transitions, 1517 flow [2022-07-19 21:19:28,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 600 transitions, 1503 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:28,693 INFO L242 Difference]: Finished difference. Result has 645 places, 589 transitions, 1417 flow [2022-07-19 21:19:28,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1417, PETRI_PLACES=645, PETRI_TRANSITIONS=589} [2022-07-19 21:19:28,694 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 24 predicate places. [2022-07-19 21:19:28,694 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 589 transitions, 1417 flow [2022-07-19 21:19:28,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 556.6111111111111) internal successors, (10019), 18 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:28,695 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:28,695 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:28,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:28,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:28,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash 865014155, now seen corresponding path program 1 times [2022-07-19 21:19:28,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:28,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641497356] [2022-07-19 21:19:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:28,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:29,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:29,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641497356] [2022-07-19 21:19:29,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641497356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:29,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653159050] [2022-07-19 21:19:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:29,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:29,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:29,015 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:29,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-19 21:19:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:29,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:29,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:29,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:29,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653159050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:29,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:29,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087555098] [2022-07-19 21:19:29,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:29,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:29,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:29,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:29,671 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-19 21:19:29,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 589 transitions, 1417 flow. Second operand has 34 states, 34 states have (on average 556.7941176470588) internal successors, (18931), 34 states have internal predecessors, (18931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:29,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:29,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-19 21:19:29,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:30,316 INFO L129 PetriNetUnfolder]: 0/787 cut-off events. [2022-07-19 21:19:30,316 INFO L130 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2022-07-19 21:19:30,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 787 events. 0/787 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2155 event pairs, 0 based on Foata normal form. 8/795 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-19 21:19:30,318 INFO L132 encePairwiseOnDemand]: 694/700 looper letters, 53 selfloop transitions, 45 changer transitions 0/640 dead transitions. [2022-07-19 21:19:30,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 640 transitions, 1929 flow [2022-07-19 21:19:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 25036 transitions. [2022-07-19 21:19:30,329 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7947936507936508 [2022-07-19 21:19:30,329 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 25036 transitions. [2022-07-19 21:19:30,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 25036 transitions. [2022-07-19 21:19:30,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:30,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 25036 transitions. [2022-07-19 21:19:30,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 556.3555555555556) internal successors, (25036), 45 states have internal predecessors, (25036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 700.0) internal successors, (32200), 46 states have internal predecessors, (32200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,369 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 700.0) internal successors, (32200), 46 states have internal predecessors, (32200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,370 INFO L186 Difference]: Start difference. First operand has 645 places, 589 transitions, 1417 flow. Second operand 45 states and 25036 transitions. [2022-07-19 21:19:30,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 640 transitions, 1929 flow [2022-07-19 21:19:30,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 640 transitions, 1889 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:30,378 INFO L242 Difference]: Finished difference. Result has 692 places, 614 transitions, 1695 flow [2022-07-19 21:19:30,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1695, PETRI_PLACES=692, PETRI_TRANSITIONS=614} [2022-07-19 21:19:30,379 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 71 predicate places. [2022-07-19 21:19:30,380 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 614 transitions, 1695 flow [2022-07-19 21:19:30,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 556.7941176470588) internal successors, (18931), 34 states have internal predecessors, (18931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,381 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:30,381 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:30,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:30,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-07-19 21:19:30,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:30,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1247181991, now seen corresponding path program 1 times [2022-07-19 21:19:30,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:30,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215731591] [2022-07-19 21:19:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:30,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:30,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215731591] [2022-07-19 21:19:30,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215731591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:30,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383636896] [2022-07-19 21:19:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:30,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:30,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:30,960 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:30,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-19 21:19:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:31,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:31,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:32,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383636896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:32,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:32,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:32,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107912556] [2022-07-19 21:19:32,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:32,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:32,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:32,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:32,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:32,236 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-19 21:19:32,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 614 transitions, 1695 flow. Second operand has 66 states, 66 states have (on average 556.8939393939394) internal successors, (36755), 66 states have internal predecessors, (36755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:32,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:32,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-19 21:19:32,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:33,244 INFO L129 PetriNetUnfolder]: 0/722 cut-off events. [2022-07-19 21:19:33,244 INFO L130 PetriNetUnfolder]: For 772/772 co-relation queries the response was YES. [2022-07-19 21:19:33,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 722 events. 0/722 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1757 event pairs, 0 based on Foata normal form. 5/727 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2022-07-19 21:19:33,246 INFO L132 encePairwiseOnDemand]: 695/700 looper letters, 60 selfloop transitions, 58 changer transitions 0/648 dead transitions. [2022-07-19 21:19:33,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 648 transitions, 2197 flow [2022-07-19 21:19:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 21:19:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-19 21:19:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 33363 transitions. [2022-07-19 21:19:33,259 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7943571428571429 [2022-07-19 21:19:33,259 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 33363 transitions. [2022-07-19 21:19:33,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 33363 transitions. [2022-07-19 21:19:33,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:33,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 33363 transitions. [2022-07-19 21:19:33,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 556.05) internal successors, (33363), 60 states have internal predecessors, (33363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:33,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 700.0) internal successors, (42700), 61 states have internal predecessors, (42700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:33,301 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 700.0) internal successors, (42700), 61 states have internal predecessors, (42700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:33,301 INFO L186 Difference]: Start difference. First operand has 692 places, 614 transitions, 1695 flow. Second operand 60 states and 33363 transitions. [2022-07-19 21:19:33,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 648 transitions, 2197 flow [2022-07-19 21:19:33,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 648 transitions, 2036 flow, removed 14 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:33,310 INFO L242 Difference]: Finished difference. Result has 705 places, 613 transitions, 1735 flow [2022-07-19 21:19:33,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=1735, PETRI_PLACES=705, PETRI_TRANSITIONS=613} [2022-07-19 21:19:33,310 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 84 predicate places. [2022-07-19 21:19:33,310 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 613 transitions, 1735 flow [2022-07-19 21:19:33,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 556.8939393939394) internal successors, (36755), 66 states have internal predecessors, (36755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:33,314 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:33,314 INFO L200 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:33,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-07-19 21:19:33,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-07-19 21:19:33,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:33,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1309795873, now seen corresponding path program 1 times [2022-07-19 21:19:33,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:33,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065772297] [2022-07-19 21:19:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:33,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:33,555 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:33,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:33,585 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:33,585 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:33,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:33,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-07-19 21:19:33,585 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:19:33,586 WARN L231 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:33,586 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2022-07-19 21:19:33,619 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:33,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 650 places, 733 transitions, 1946 flow [2022-07-19 21:19:33,996 INFO L129 PetriNetUnfolder]: 204/1508 cut-off events. [2022-07-19 21:19:33,997 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-07-19 21:19:34,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 1508 events. 204/1508 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5720 event pairs, 0 based on Foata normal form. 0/1262 useless extension candidates. Maximal degree in co-relation 1656. Up to 42 conditions per place. [2022-07-19 21:19:34,069 INFO L82 GeneralOperation]: Start removeDead. Operand has 650 places, 733 transitions, 1946 flow [2022-07-19 21:19:34,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 650 places, 733 transitions, 1946 flow [2022-07-19 21:19:34,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:34,097 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:19:34,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:34,101 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2022-07-19 21:19:34,101 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:34,101 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:34,101 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:34,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2053273849, now seen corresponding path program 1 times [2022-07-19 21:19:34,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:34,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321527143] [2022-07-19 21:19:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:34,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:34,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:34,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321527143] [2022-07-19 21:19:34,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321527143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:34,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:34,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:34,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725232215] [2022-07-19 21:19:34,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:34,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:34,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:34,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:34,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:34,118 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 581 out of 733 [2022-07-19 21:19:34,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 733 transitions, 1946 flow. Second operand has 3 states, 3 states have (on average 582.0) internal successors, (1746), 3 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:34,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:34,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 581 of 733 [2022-07-19 21:19:34,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:34,569 INFO L129 PetriNetUnfolder]: 0/1258 cut-off events. [2022-07-19 21:19:34,569 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-07-19 21:19:34,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1654 conditions, 1258 events. 0/1258 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5235 event pairs, 0 based on Foata normal form. 6845/8063 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2022-07-19 21:19:34,571 INFO L132 encePairwiseOnDemand]: 606/733 looper letters, 29 selfloop transitions, 2 changer transitions 12/612 dead transitions. [2022-07-19 21:19:34,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 612 transitions, 1766 flow [2022-07-19 21:19:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:34,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1906 transitions. [2022-07-19 21:19:34,573 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8667576170986813 [2022-07-19 21:19:34,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1906 transitions. [2022-07-19 21:19:34,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1906 transitions. [2022-07-19 21:19:34,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:34,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1906 transitions. [2022-07-19 21:19:34,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 635.3333333333334) internal successors, (1906), 3 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:34,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 733.0) internal successors, (2932), 4 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:34,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 733.0) internal successors, (2932), 4 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:34,575 INFO L186 Difference]: Start difference. First operand has 650 places, 733 transitions, 1946 flow. Second operand 3 states and 1906 transitions. [2022-07-19 21:19:34,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 612 transitions, 1766 flow [2022-07-19 21:19:34,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 612 transitions, 1386 flow, removed 190 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:34,583 INFO L242 Difference]: Finished difference. Result has 652 places, 597 transitions, 1304 flow [2022-07-19 21:19:34,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1304, PETRI_PLACES=652, PETRI_TRANSITIONS=597} [2022-07-19 21:19:34,583 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 2 predicate places. [2022-07-19 21:19:34,583 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 597 transitions, 1304 flow [2022-07-19 21:19:34,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 582.0) internal successors, (1746), 3 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:34,584 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:34,584 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] [2022-07-19 21:19:34,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-07-19 21:19:34,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash 208730624, now seen corresponding path program 1 times [2022-07-19 21:19:34,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:34,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631472952] [2022-07-19 21:19:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:34,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:34,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631472952] [2022-07-19 21:19:34,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631472952] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:34,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690861864] [2022-07-19 21:19:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:34,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:34,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:34,606 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:34,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-19 21:19:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:34,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:34,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:34,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:35,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690861864] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:35,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:35,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027511637] [2022-07-19 21:19:35,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:35,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:35,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:35,018 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-19 21:19:35,020 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 597 transitions, 1304 flow. Second operand has 10 states, 10 states have (on average 582.3) internal successors, (5823), 10 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:35,021 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:35,021 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-19 21:19:35,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:35,395 INFO L129 PetriNetUnfolder]: 0/992 cut-off events. [2022-07-19 21:19:35,396 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-19 21:19:35,396 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1258 conditions, 992 events. 0/992 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3363 event pairs, 0 based on Foata normal form. 2/994 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-19 21:19:35,398 INFO L132 encePairwiseOnDemand]: 727/733 looper letters, 30 selfloop transitions, 9 changer transitions 0/607 dead transitions. [2022-07-19 21:19:35,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 607 transitions, 1404 flow [2022-07-19 21:19:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5261 transitions. [2022-07-19 21:19:35,400 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7974837047142641 [2022-07-19 21:19:35,401 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5261 transitions. [2022-07-19 21:19:35,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5261 transitions. [2022-07-19 21:19:35,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:35,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5261 transitions. [2022-07-19 21:19:35,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 584.5555555555555) internal successors, (5261), 9 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:35,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 733.0) internal successors, (7330), 10 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:35,407 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 733.0) internal successors, (7330), 10 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:35,407 INFO L186 Difference]: Start difference. First operand has 652 places, 597 transitions, 1304 flow. Second operand 9 states and 5261 transitions. [2022-07-19 21:19:35,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 607 transitions, 1404 flow [2022-07-19 21:19:35,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 607 transitions, 1402 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:35,413 INFO L242 Difference]: Finished difference. Result has 650 places, 603 transitions, 1352 flow [2022-07-19 21:19:35,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1352, PETRI_PLACES=650, PETRI_TRANSITIONS=603} [2022-07-19 21:19:35,414 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 0 predicate places. [2022-07-19 21:19:35,414 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 603 transitions, 1352 flow [2022-07-19 21:19:35,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 582.3) internal successors, (5823), 10 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:35,415 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:35,415 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] [2022-07-19 21:19:35,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-19 21:19:35,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-07-19 21:19:35,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash 329362997, now seen corresponding path program 1 times [2022-07-19 21:19:35,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:35,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425858056] [2022-07-19 21:19:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:35,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:35,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425858056] [2022-07-19 21:19:35,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425858056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:35,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675856482] [2022-07-19 21:19:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:35,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:35,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:35,678 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:35,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-19 21:19:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:36,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:36,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:36,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:36,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675856482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:36,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:36,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:36,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132357742] [2022-07-19 21:19:36,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:36,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:36,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:36,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:36,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:36,297 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-19 21:19:36,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 603 transitions, 1352 flow. Second operand has 18 states, 18 states have (on average 582.6111111111111) internal successors, (10487), 18 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:36,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:36,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-19 21:19:36,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:36,785 INFO L129 PetriNetUnfolder]: 0/940 cut-off events. [2022-07-19 21:19:36,785 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-19 21:19:36,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 940 events. 0/940 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3025 event pairs, 0 based on Foata normal form. 4/944 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-19 21:19:36,787 INFO L132 encePairwiseOnDemand]: 727/733 looper letters, 38 selfloop transitions, 21 changer transitions 0/627 dead transitions. [2022-07-19 21:19:36,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 627 transitions, 1578 flow [2022-07-19 21:19:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12243 transitions. [2022-07-19 21:19:36,793 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953615279672579 [2022-07-19 21:19:36,793 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12243 transitions. [2022-07-19 21:19:36,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12243 transitions. [2022-07-19 21:19:36,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:36,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12243 transitions. [2022-07-19 21:19:36,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 583.0) internal successors, (12243), 21 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:36,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 733.0) internal successors, (16126), 22 states have internal predecessors, (16126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:36,807 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 733.0) internal successors, (16126), 22 states have internal predecessors, (16126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:36,807 INFO L186 Difference]: Start difference. First operand has 650 places, 603 transitions, 1352 flow. Second operand 21 states and 12243 transitions. [2022-07-19 21:19:36,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 627 transitions, 1578 flow [2022-07-19 21:19:36,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 627 transitions, 1564 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:36,815 INFO L242 Difference]: Finished difference. Result has 674 places, 616 transitions, 1476 flow [2022-07-19 21:19:36,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1476, PETRI_PLACES=674, PETRI_TRANSITIONS=616} [2022-07-19 21:19:36,816 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 24 predicate places. [2022-07-19 21:19:36,816 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 616 transitions, 1476 flow [2022-07-19 21:19:36,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 582.6111111111111) internal successors, (10487), 18 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:36,817 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:36,817 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:36,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-19 21:19:37,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-19 21:19:37,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:37,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:37,038 INFO L85 PathProgramCache]: Analyzing trace with hash 179244203, now seen corresponding path program 1 times [2022-07-19 21:19:37,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:37,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193428396] [2022-07-19 21:19:37,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:37,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:37,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193428396] [2022-07-19 21:19:37,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193428396] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712962644] [2022-07-19 21:19:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:37,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:37,147 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:37,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-19 21:19:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:37,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:37,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:37,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712962644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:37,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:37,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:37,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104240384] [2022-07-19 21:19:37,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:37,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:37,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:37,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:37,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:37,852 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-19 21:19:37,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 616 transitions, 1476 flow. Second operand has 34 states, 34 states have (on average 582.7941176470588) internal successors, (19815), 34 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:37,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:37,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-19 21:19:37,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:38,593 INFO L129 PetriNetUnfolder]: 0/836 cut-off events. [2022-07-19 21:19:38,593 INFO L130 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2022-07-19 21:19:38,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 836 events. 0/836 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2343 event pairs, 0 based on Foata normal form. 8/844 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-07-19 21:19:38,595 INFO L132 encePairwiseOnDemand]: 727/733 looper letters, 54 selfloop transitions, 45 changer transitions 0/667 dead transitions. [2022-07-19 21:19:38,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 667 transitions, 1990 flow [2022-07-19 21:19:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 26207 transitions. [2022-07-19 21:19:38,607 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945126572684553 [2022-07-19 21:19:38,607 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 26207 transitions. [2022-07-19 21:19:38,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 26207 transitions. [2022-07-19 21:19:38,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:38,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 26207 transitions. [2022-07-19 21:19:38,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 582.3777777777777) internal successors, (26207), 45 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:38,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 733.0) internal successors, (33718), 46 states have internal predecessors, (33718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:38,649 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 733.0) internal successors, (33718), 46 states have internal predecessors, (33718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:38,649 INFO L186 Difference]: Start difference. First operand has 674 places, 616 transitions, 1476 flow. Second operand 45 states and 26207 transitions. [2022-07-19 21:19:38,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 667 transitions, 1990 flow [2022-07-19 21:19:38,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 667 transitions, 1950 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:38,658 INFO L242 Difference]: Finished difference. Result has 721 places, 641 transitions, 1754 flow [2022-07-19 21:19:38,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1754, PETRI_PLACES=721, PETRI_TRANSITIONS=641} [2022-07-19 21:19:38,659 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 71 predicate places. [2022-07-19 21:19:38,659 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 641 transitions, 1754 flow [2022-07-19 21:19:38,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 582.7941176470588) internal successors, (19815), 34 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:38,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:38,661 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:38,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:38,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-07-19 21:19:38,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash -235927097, now seen corresponding path program 1 times [2022-07-19 21:19:38,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:38,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921417810] [2022-07-19 21:19:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:38,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:39,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:39,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921417810] [2022-07-19 21:19:39,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921417810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:39,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799266061] [2022-07-19 21:19:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:39,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:39,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:39,189 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:39,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-19 21:19:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:39,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:39,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:39,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:40,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799266061] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:40,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:40,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:40,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177671160] [2022-07-19 21:19:40,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:40,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:40,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:40,540 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-19 21:19:40,550 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 641 transitions, 1754 flow. Second operand has 66 states, 66 states have (on average 582.8939393939394) internal successors, (38471), 66 states have internal predecessors, (38471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:40,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:40,551 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-19 21:19:40,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:41,597 INFO L129 PetriNetUnfolder]: 0/758 cut-off events. [2022-07-19 21:19:41,597 INFO L130 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2022-07-19 21:19:41,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 758 events. 0/758 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1855 event pairs, 0 based on Foata normal form. 6/764 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-19 21:19:41,599 INFO L132 encePairwiseOnDemand]: 728/733 looper letters, 63 selfloop transitions, 61 changer transitions 0/680 dead transitions. [2022-07-19 21:19:41,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 680 transitions, 2312 flow [2022-07-19 21:19:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-19 21:19:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-19 21:19:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 36670 transitions. [2022-07-19 21:19:41,673 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.794083890946101 [2022-07-19 21:19:41,673 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 36670 transitions. [2022-07-19 21:19:41,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 36670 transitions. [2022-07-19 21:19:41,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:41,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 36670 transitions. [2022-07-19 21:19:41,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 582.063492063492) internal successors, (36670), 63 states have internal predecessors, (36670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:41,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 733.0) internal successors, (46912), 64 states have internal predecessors, (46912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:41,730 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 733.0) internal successors, (46912), 64 states have internal predecessors, (46912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:41,730 INFO L186 Difference]: Start difference. First operand has 721 places, 641 transitions, 1754 flow. Second operand 63 states and 36670 transitions. [2022-07-19 21:19:41,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 680 transitions, 2312 flow [2022-07-19 21:19:41,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 680 transitions, 2143 flow, removed 15 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:41,739 INFO L242 Difference]: Finished difference. Result has 737 places, 643 transitions, 1823 flow [2022-07-19 21:19:41,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1823, PETRI_PLACES=737, PETRI_TRANSITIONS=643} [2022-07-19 21:19:41,740 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 87 predicate places. [2022-07-19 21:19:41,740 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 643 transitions, 1823 flow [2022-07-19 21:19:41,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 582.8939393939394) internal successors, (38471), 66 states have internal predecessors, (38471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:41,744 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:41,744 INFO L200 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:41,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:41,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-07-19 21:19:41,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1626237267, now seen corresponding path program 1 times [2022-07-19 21:19:41,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:41,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994946809] [2022-07-19 21:19:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:41,987 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:42,021 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:42,022 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:42,022 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:42,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:42,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-07-19 21:19:42,022 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:19:42,023 WARN L231 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:42,023 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2022-07-19 21:19:42,059 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:42,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 679 places, 766 transitions, 2057 flow [2022-07-19 21:19:42,492 INFO L129 PetriNetUnfolder]: 214/1580 cut-off events. [2022-07-19 21:19:42,493 INFO L130 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-07-19 21:19:42,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 1580 events. 214/1580 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6012 event pairs, 0 based on Foata normal form. 0/1322 useless extension candidates. Maximal degree in co-relation 1751. Up to 44 conditions per place. [2022-07-19 21:19:42,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 679 places, 766 transitions, 2057 flow [2022-07-19 21:19:42,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 679 places, 766 transitions, 2057 flow [2022-07-19 21:19:42,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:42,612 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:19:42,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:42,615 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2022-07-19 21:19:42,616 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:42,616 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:42,616 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:42,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1599402311, now seen corresponding path program 1 times [2022-07-19 21:19:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:42,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261697691] [2022-07-19 21:19:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:42,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:42,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:42,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261697691] [2022-07-19 21:19:42,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261697691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:42,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:42,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:42,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333868061] [2022-07-19 21:19:42,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:42,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:42,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:42,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:42,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:42,635 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 607 out of 766 [2022-07-19 21:19:42,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 766 transitions, 2057 flow. Second operand has 3 states, 3 states have (on average 608.0) internal successors, (1824), 3 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:42,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:42,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 607 of 766 [2022-07-19 21:19:42,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:43,110 INFO L129 PetriNetUnfolder]: 0/1319 cut-off events. [2022-07-19 21:19:43,111 INFO L130 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-07-19 21:19:43,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 1319 events. 0/1319 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5476 event pairs, 0 based on Foata normal form. 7564/8841 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2022-07-19 21:19:43,113 INFO L132 encePairwiseOnDemand]: 633/766 looper letters, 30 selfloop transitions, 2 changer transitions 12/639 dead transitions. [2022-07-19 21:19:43,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 639 transitions, 1867 flow [2022-07-19 21:19:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1991 transitions. [2022-07-19 21:19:43,115 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8664055700609226 [2022-07-19 21:19:43,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1991 transitions. [2022-07-19 21:19:43,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1991 transitions. [2022-07-19 21:19:43,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:43,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1991 transitions. [2022-07-19 21:19:43,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 663.6666666666666) internal successors, (1991), 3 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:43,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:43,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:43,118 INFO L186 Difference]: Start difference. First operand has 679 places, 766 transitions, 2057 flow. Second operand 3 states and 1991 transitions. [2022-07-19 21:19:43,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 639 transitions, 1867 flow [2022-07-19 21:19:43,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 639 transitions, 1447 flow, removed 210 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:43,127 INFO L242 Difference]: Finished difference. Result has 681 places, 624 transitions, 1363 flow [2022-07-19 21:19:43,127 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1363, PETRI_PLACES=681, PETRI_TRANSITIONS=624} [2022-07-19 21:19:43,128 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 2 predicate places. [2022-07-19 21:19:43,128 INFO L495 AbstractCegarLoop]: Abstraction has has 681 places, 624 transitions, 1363 flow [2022-07-19 21:19:43,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 608.0) internal successors, (1824), 3 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:43,128 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:43,128 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] [2022-07-19 21:19:43,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-07-19 21:19:43,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash 163924768, now seen corresponding path program 1 times [2022-07-19 21:19:43,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:43,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074937676] [2022-07-19 21:19:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:43,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:43,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:43,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074937676] [2022-07-19 21:19:43,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074937676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:43,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890343079] [2022-07-19 21:19:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:43,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:43,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:43,166 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:43,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-19 21:19:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:43,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:43,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:43,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890343079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:43,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:43,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:43,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651324598] [2022-07-19 21:19:43,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:43,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:43,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:43,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:43,724 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-19 21:19:43,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 624 transitions, 1363 flow. Second operand has 10 states, 10 states have (on average 608.3) internal successors, (6083), 10 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:43,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:43,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-19 21:19:43,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:44,125 INFO L129 PetriNetUnfolder]: 0/1041 cut-off events. [2022-07-19 21:19:44,126 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-19 21:19:44,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 1041 events. 0/1041 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3549 event pairs, 0 based on Foata normal form. 2/1043 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-19 21:19:44,128 INFO L132 encePairwiseOnDemand]: 760/766 looper letters, 31 selfloop transitions, 9 changer transitions 0/634 dead transitions. [2022-07-19 21:19:44,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 634 transitions, 1465 flow [2022-07-19 21:19:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5496 transitions. [2022-07-19 21:19:44,131 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7972149695387293 [2022-07-19 21:19:44,131 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5496 transitions. [2022-07-19 21:19:44,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5496 transitions. [2022-07-19 21:19:44,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:44,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5496 transitions. [2022-07-19 21:19:44,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 610.6666666666666) internal successors, (5496), 9 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:44,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 766.0) internal successors, (7660), 10 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:44,138 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 766.0) internal successors, (7660), 10 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:44,138 INFO L186 Difference]: Start difference. First operand has 681 places, 624 transitions, 1363 flow. Second operand 9 states and 5496 transitions. [2022-07-19 21:19:44,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 634 transitions, 1465 flow [2022-07-19 21:19:44,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 634 transitions, 1463 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:44,144 INFO L242 Difference]: Finished difference. Result has 679 places, 630 transitions, 1411 flow [2022-07-19 21:19:44,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=679, PETRI_TRANSITIONS=630} [2022-07-19 21:19:44,145 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 0 predicate places. [2022-07-19 21:19:44,145 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 630 transitions, 1411 flow [2022-07-19 21:19:44,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 608.3) internal successors, (6083), 10 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:44,146 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:44,146 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] [2022-07-19 21:19:44,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:44,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:44,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:44,363 INFO L85 PathProgramCache]: Analyzing trace with hash -766737131, now seen corresponding path program 1 times [2022-07-19 21:19:44,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:44,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532093407] [2022-07-19 21:19:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:44,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:44,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:44,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532093407] [2022-07-19 21:19:44,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532093407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:44,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897392579] [2022-07-19 21:19:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:44,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:44,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:44,407 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:44,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-19 21:19:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:44,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:44,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:44,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:44,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897392579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:44,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:44,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:44,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533252200] [2022-07-19 21:19:44,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:44,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:44,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:44,925 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-19 21:19:44,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 630 transitions, 1411 flow. Second operand has 18 states, 18 states have (on average 608.6111111111111) internal successors, (10955), 18 states have internal predecessors, (10955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:44,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:44,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-19 21:19:44,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:45,469 INFO L129 PetriNetUnfolder]: 0/989 cut-off events. [2022-07-19 21:19:45,469 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-07-19 21:19:45,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 989 events. 0/989 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3208 event pairs, 0 based on Foata normal form. 4/993 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-19 21:19:45,471 INFO L132 encePairwiseOnDemand]: 760/766 looper letters, 39 selfloop transitions, 21 changer transitions 0/654 dead transitions. [2022-07-19 21:19:45,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 654 transitions, 1639 flow [2022-07-19 21:19:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12790 transitions. [2022-07-19 21:19:45,477 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951013303493721 [2022-07-19 21:19:45,478 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12790 transitions. [2022-07-19 21:19:45,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12790 transitions. [2022-07-19 21:19:45,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:45,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12790 transitions. [2022-07-19 21:19:45,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 609.047619047619) internal successors, (12790), 21 states have internal predecessors, (12790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:45,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 766.0) internal successors, (16852), 22 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:45,495 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 766.0) internal successors, (16852), 22 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:45,495 INFO L186 Difference]: Start difference. First operand has 679 places, 630 transitions, 1411 flow. Second operand 21 states and 12790 transitions. [2022-07-19 21:19:45,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 654 transitions, 1639 flow [2022-07-19 21:19:45,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 654 transitions, 1625 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:45,504 INFO L242 Difference]: Finished difference. Result has 703 places, 643 transitions, 1535 flow [2022-07-19 21:19:45,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1535, PETRI_PLACES=703, PETRI_TRANSITIONS=643} [2022-07-19 21:19:45,505 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 24 predicate places. [2022-07-19 21:19:45,505 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 643 transitions, 1535 flow [2022-07-19 21:19:45,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 608.6111111111111) internal successors, (10955), 18 states have internal predecessors, (10955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:45,506 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:45,506 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:45,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:45,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:45,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1338101515, now seen corresponding path program 1 times [2022-07-19 21:19:45,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:45,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24833148] [2022-07-19 21:19:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:45,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:45,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:45,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24833148] [2022-07-19 21:19:45,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24833148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:45,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397498567] [2022-07-19 21:19:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:45,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:45,829 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:45,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-19 21:19:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:46,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:46,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:46,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:46,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397498567] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:46,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:46,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:46,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857117584] [2022-07-19 21:19:46,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:46,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:46,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:46,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:46,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:46,567 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-19 21:19:46,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 643 transitions, 1535 flow. Second operand has 34 states, 34 states have (on average 608.7941176470588) internal successors, (20699), 34 states have internal predecessors, (20699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:46,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:46,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-19 21:19:46,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:47,370 INFO L129 PetriNetUnfolder]: 0/885 cut-off events. [2022-07-19 21:19:47,371 INFO L130 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2022-07-19 21:19:47,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 885 events. 0/885 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2524 event pairs, 0 based on Foata normal form. 8/893 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-19 21:19:47,373 INFO L132 encePairwiseOnDemand]: 760/766 looper letters, 55 selfloop transitions, 45 changer transitions 0/694 dead transitions. [2022-07-19 21:19:47,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 694 transitions, 2051 flow [2022-07-19 21:19:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 27378 transitions. [2022-07-19 21:19:47,384 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7942558746736292 [2022-07-19 21:19:47,384 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 27378 transitions. [2022-07-19 21:19:47,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 27378 transitions. [2022-07-19 21:19:47,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:47,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 27378 transitions. [2022-07-19 21:19:47,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 608.4) internal successors, (27378), 45 states have internal predecessors, (27378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:47,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 766.0) internal successors, (35236), 46 states have internal predecessors, (35236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:47,428 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 766.0) internal successors, (35236), 46 states have internal predecessors, (35236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:47,428 INFO L186 Difference]: Start difference. First operand has 703 places, 643 transitions, 1535 flow. Second operand 45 states and 27378 transitions. [2022-07-19 21:19:47,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 694 transitions, 2051 flow [2022-07-19 21:19:47,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 694 transitions, 2011 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:47,437 INFO L242 Difference]: Finished difference. Result has 750 places, 668 transitions, 1813 flow [2022-07-19 21:19:47,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1813, PETRI_PLACES=750, PETRI_TRANSITIONS=668} [2022-07-19 21:19:47,438 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 71 predicate places. [2022-07-19 21:19:47,439 INFO L495 AbstractCegarLoop]: Abstraction has has 750 places, 668 transitions, 1813 flow [2022-07-19 21:19:47,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 608.7941176470588) internal successors, (20699), 34 states have internal predecessors, (20699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:47,441 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:47,441 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:47,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:47,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:47,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:47,661 INFO L85 PathProgramCache]: Analyzing trace with hash 553526055, now seen corresponding path program 1 times [2022-07-19 21:19:47,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:47,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132091162] [2022-07-19 21:19:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:47,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:47,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132091162] [2022-07-19 21:19:47,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132091162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:47,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509756482] [2022-07-19 21:19:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:47,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:47,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:47,919 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:47,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-19 21:19:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:48,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:48,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:48,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:49,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509756482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:49,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:49,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:49,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740007590] [2022-07-19 21:19:49,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:49,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:49,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:49,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:49,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:49,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-19 21:19:49,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 668 transitions, 1813 flow. Second operand has 66 states, 66 states have (on average 608.8939393939394) internal successors, (40187), 66 states have internal predecessors, (40187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:49,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:49,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-19 21:19:49,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:50,148 INFO L129 PetriNetUnfolder]: 0/794 cut-off events. [2022-07-19 21:19:50,148 INFO L130 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2022-07-19 21:19:50,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 794 events. 0/794 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1953 event pairs, 0 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2022-07-19 21:19:50,150 INFO L132 encePairwiseOnDemand]: 761/766 looper letters, 66 selfloop transitions, 64 changer transitions 0/712 dead transitions. [2022-07-19 21:19:50,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 712 transitions, 2427 flow [2022-07-19 21:19:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-19 21:19:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-19 21:19:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 40133 transitions. [2022-07-19 21:19:50,166 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7938325816915895 [2022-07-19 21:19:50,166 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 40133 transitions. [2022-07-19 21:19:50,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 40133 transitions. [2022-07-19 21:19:50,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:50,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 40133 transitions. [2022-07-19 21:19:50,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 608.0757575757576) internal successors, (40133), 66 states have internal predecessors, (40133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:50,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 766.0) internal successors, (51322), 67 states have internal predecessors, (51322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:50,230 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 766.0) internal successors, (51322), 67 states have internal predecessors, (51322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:50,230 INFO L186 Difference]: Start difference. First operand has 750 places, 668 transitions, 1813 flow. Second operand 66 states and 40133 transitions. [2022-07-19 21:19:50,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 712 transitions, 2427 flow [2022-07-19 21:19:50,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 712 transitions, 2250 flow, removed 16 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:50,241 INFO L242 Difference]: Finished difference. Result has 769 places, 673 transitions, 1911 flow [2022-07-19 21:19:50,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1911, PETRI_PLACES=769, PETRI_TRANSITIONS=673} [2022-07-19 21:19:50,242 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 90 predicate places. [2022-07-19 21:19:50,242 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 673 transitions, 1911 flow [2022-07-19 21:19:50,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 608.8939393939394) internal successors, (40187), 66 states have internal predecessors, (40187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:50,246 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:50,246 INFO L200 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:50,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-19 21:19:50,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-07-19 21:19:50,449 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash -243572998, now seen corresponding path program 1 times [2022-07-19 21:19:50,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:50,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093175291] [2022-07-19 21:19:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:50,504 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:50,541 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:50,541 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:50,541 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:50,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:50,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-07-19 21:19:50,542 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:19:50,542 WARN L231 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:50,542 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2022-07-19 21:19:50,586 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:50,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 708 places, 799 transitions, 2170 flow [2022-07-19 21:19:51,109 INFO L129 PetriNetUnfolder]: 224/1652 cut-off events. [2022-07-19 21:19:51,109 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-19 21:19:51,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1972 conditions, 1652 events. 224/1652 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6314 event pairs, 0 based on Foata normal form. 0/1382 useless extension candidates. Maximal degree in co-relation 1847. Up to 46 conditions per place. [2022-07-19 21:19:51,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 708 places, 799 transitions, 2170 flow [2022-07-19 21:19:51,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 708 places, 799 transitions, 2170 flow [2022-07-19 21:19:51,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:51,239 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:19:51,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:51,242 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-19 21:19:51,242 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:51,242 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:51,242 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:51,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:51,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1599319449, now seen corresponding path program 1 times [2022-07-19 21:19:51,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:51,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959711687] [2022-07-19 21:19:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:51,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:51,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:51,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959711687] [2022-07-19 21:19:51,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959711687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:51,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:51,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:51,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644885500] [2022-07-19 21:19:51,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:51,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:51,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:51,261 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 633 out of 799 [2022-07-19 21:19:51,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 799 transitions, 2170 flow. Second operand has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:51,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:51,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 633 of 799 [2022-07-19 21:19:51,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:51,802 INFO L129 PetriNetUnfolder]: 0/1380 cut-off events. [2022-07-19 21:19:51,802 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-19 21:19:51,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1837 conditions, 1380 events. 0/1380 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5779 event pairs, 0 based on Foata normal form. 8319/9655 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2022-07-19 21:19:51,805 INFO L132 encePairwiseOnDemand]: 660/799 looper letters, 31 selfloop transitions, 2 changer transitions 12/666 dead transitions. [2022-07-19 21:19:51,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 666 transitions, 1970 flow [2022-07-19 21:19:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2076 transitions. [2022-07-19 21:19:51,807 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8660826032540676 [2022-07-19 21:19:51,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2076 transitions. [2022-07-19 21:19:51,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2076 transitions. [2022-07-19 21:19:51,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:51,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2076 transitions. [2022-07-19 21:19:51,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 692.0) internal successors, (2076), 3 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:51,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 799.0) internal successors, (3196), 4 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:51,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 799.0) internal successors, (3196), 4 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:51,810 INFO L186 Difference]: Start difference. First operand has 708 places, 799 transitions, 2170 flow. Second operand 3 states and 2076 transitions. [2022-07-19 21:19:51,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 666 transitions, 1970 flow [2022-07-19 21:19:51,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 666 transitions, 1508 flow, removed 231 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:51,819 INFO L242 Difference]: Finished difference. Result has 710 places, 651 transitions, 1422 flow [2022-07-19 21:19:51,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1422, PETRI_PLACES=710, PETRI_TRANSITIONS=651} [2022-07-19 21:19:51,819 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 2 predicate places. [2022-07-19 21:19:51,819 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 651 transitions, 1422 flow [2022-07-19 21:19:51,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:51,820 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:51,820 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] [2022-07-19 21:19:51,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-07-19 21:19:51,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:51,821 INFO L85 PathProgramCache]: Analyzing trace with hash -905363520, now seen corresponding path program 1 times [2022-07-19 21:19:51,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:51,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731012969] [2022-07-19 21:19:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:51,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:51,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731012969] [2022-07-19 21:19:51,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731012969] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219690943] [2022-07-19 21:19:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:51,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:51,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:51,844 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:51,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-19 21:19:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:52,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:52,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:52,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:52,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219690943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:52,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:52,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:52,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298643420] [2022-07-19 21:19:52,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:52,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:52,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:52,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:52,319 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-19 21:19:52,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 651 transitions, 1422 flow. Second operand has 10 states, 10 states have (on average 634.3) internal successors, (6343), 10 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:52,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:52,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-19 21:19:52,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:52,787 INFO L129 PetriNetUnfolder]: 0/1090 cut-off events. [2022-07-19 21:19:52,788 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-19 21:19:52,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 1090 events. 0/1090 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3730 event pairs, 0 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-19 21:19:52,790 INFO L132 encePairwiseOnDemand]: 793/799 looper letters, 32 selfloop transitions, 9 changer transitions 0/661 dead transitions. [2022-07-19 21:19:52,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 661 transitions, 1526 flow [2022-07-19 21:19:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5731 transitions. [2022-07-19 21:19:52,793 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969684327631762 [2022-07-19 21:19:52,793 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5731 transitions. [2022-07-19 21:19:52,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5731 transitions. [2022-07-19 21:19:52,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:52,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5731 transitions. [2022-07-19 21:19:52,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 636.7777777777778) internal successors, (5731), 9 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:52,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 799.0) internal successors, (7990), 10 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:52,800 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 799.0) internal successors, (7990), 10 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:52,801 INFO L186 Difference]: Start difference. First operand has 710 places, 651 transitions, 1422 flow. Second operand 9 states and 5731 transitions. [2022-07-19 21:19:52,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 661 transitions, 1526 flow [2022-07-19 21:19:52,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 661 transitions, 1524 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:52,807 INFO L242 Difference]: Finished difference. Result has 708 places, 657 transitions, 1470 flow [2022-07-19 21:19:52,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1470, PETRI_PLACES=708, PETRI_TRANSITIONS=657} [2022-07-19 21:19:52,808 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 0 predicate places. [2022-07-19 21:19:52,808 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 657 transitions, 1470 flow [2022-07-19 21:19:52,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 634.3) internal successors, (6343), 10 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:52,809 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:52,809 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] [2022-07-19 21:19:52,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-19 21:19:53,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-07-19 21:19:53,011 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:53,011 INFO L85 PathProgramCache]: Analyzing trace with hash 299532469, now seen corresponding path program 1 times [2022-07-19 21:19:53,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561381380] [2022-07-19 21:19:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:53,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:53,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561381380] [2022-07-19 21:19:53,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561381380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294568918] [2022-07-19 21:19:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:53,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:53,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:53,056 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:53,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-19 21:19:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:53,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:53,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:53,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:53,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294568918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:53,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:53,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:53,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200014196] [2022-07-19 21:19:53,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:53,657 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-19 21:19:53,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 657 transitions, 1470 flow. Second operand has 18 states, 18 states have (on average 634.6111111111111) internal successors, (11423), 18 states have internal predecessors, (11423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:53,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:53,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-19 21:19:53,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:54,265 INFO L129 PetriNetUnfolder]: 0/1038 cut-off events. [2022-07-19 21:19:54,265 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-07-19 21:19:54,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1038 events. 0/1038 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3390 event pairs, 0 based on Foata normal form. 4/1042 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-19 21:19:54,267 INFO L132 encePairwiseOnDemand]: 793/799 looper letters, 40 selfloop transitions, 21 changer transitions 0/681 dead transitions. [2022-07-19 21:19:54,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 728 places, 681 transitions, 1700 flow [2022-07-19 21:19:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13337 transitions. [2022-07-19 21:19:54,273 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7948626259014244 [2022-07-19 21:19:54,273 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13337 transitions. [2022-07-19 21:19:54,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13337 transitions. [2022-07-19 21:19:54,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:54,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13337 transitions. [2022-07-19 21:19:54,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 635.0952380952381) internal successors, (13337), 21 states have internal predecessors, (13337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:54,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 799.0) internal successors, (17578), 22 states have internal predecessors, (17578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:54,290 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 799.0) internal successors, (17578), 22 states have internal predecessors, (17578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:54,290 INFO L186 Difference]: Start difference. First operand has 708 places, 657 transitions, 1470 flow. Second operand 21 states and 13337 transitions. [2022-07-19 21:19:54,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 728 places, 681 transitions, 1700 flow [2022-07-19 21:19:54,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 681 transitions, 1686 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:54,299 INFO L242 Difference]: Finished difference. Result has 732 places, 670 transitions, 1594 flow [2022-07-19 21:19:54,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1594, PETRI_PLACES=732, PETRI_TRANSITIONS=670} [2022-07-19 21:19:54,300 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 24 predicate places. [2022-07-19 21:19:54,300 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 670 transitions, 1594 flow [2022-07-19 21:19:54,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 634.6111111111111) internal successors, (11423), 18 states have internal predecessors, (11423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:54,301 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:54,301 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:54,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:54,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:54,521 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:54,521 INFO L85 PathProgramCache]: Analyzing trace with hash 46618795, now seen corresponding path program 1 times [2022-07-19 21:19:54,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:54,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224460523] [2022-07-19 21:19:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:54,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:54,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:54,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224460523] [2022-07-19 21:19:54,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224460523] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:54,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701762469] [2022-07-19 21:19:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:54,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:54,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:54,638 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:54,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-19 21:19:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:55,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:55,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:55,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701762469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:55,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:55,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:55,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654302281] [2022-07-19 21:19:55,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:55,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:55,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:55,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:55,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:55,492 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-19 21:19:55,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 670 transitions, 1594 flow. Second operand has 34 states, 34 states have (on average 634.7941176470588) internal successors, (21583), 34 states have internal predecessors, (21583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:55,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:55,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-19 21:19:55,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:56,336 INFO L129 PetriNetUnfolder]: 0/934 cut-off events. [2022-07-19 21:19:56,336 INFO L130 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-07-19 21:19:56,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 934 events. 0/934 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2707 event pairs, 0 based on Foata normal form. 8/942 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2022-07-19 21:19:56,339 INFO L132 encePairwiseOnDemand]: 793/799 looper letters, 56 selfloop transitions, 45 changer transitions 0/721 dead transitions. [2022-07-19 21:19:56,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 721 transitions, 2112 flow [2022-07-19 21:19:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 28549 transitions. [2022-07-19 21:19:56,351 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940203031567237 [2022-07-19 21:19:56,352 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 28549 transitions. [2022-07-19 21:19:56,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 28549 transitions. [2022-07-19 21:19:56,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:56,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 28549 transitions. [2022-07-19 21:19:56,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 634.4222222222222) internal successors, (28549), 45 states have internal predecessors, (28549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:56,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 799.0) internal successors, (36754), 46 states have internal predecessors, (36754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:56,401 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 799.0) internal successors, (36754), 46 states have internal predecessors, (36754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:56,401 INFO L186 Difference]: Start difference. First operand has 732 places, 670 transitions, 1594 flow. Second operand 45 states and 28549 transitions. [2022-07-19 21:19:56,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 721 transitions, 2112 flow [2022-07-19 21:19:56,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 721 transitions, 2072 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:56,412 INFO L242 Difference]: Finished difference. Result has 779 places, 695 transitions, 1872 flow [2022-07-19 21:19:56,413 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1872, PETRI_PLACES=779, PETRI_TRANSITIONS=695} [2022-07-19 21:19:56,417 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 71 predicate places. [2022-07-19 21:19:56,418 INFO L495 AbstractCegarLoop]: Abstraction has has 779 places, 695 transitions, 1872 flow [2022-07-19 21:19:56,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 634.7941176470588) internal successors, (21583), 34 states have internal predecessors, (21583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:56,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:56,420 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:56,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-07-19 21:19:56,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-07-19 21:19:56,624 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash -679425849, now seen corresponding path program 1 times [2022-07-19 21:19:56,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:56,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081848270] [2022-07-19 21:19:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:56,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081848270] [2022-07-19 21:19:56,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081848270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22935452] [2022-07-19 21:19:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:56,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:56,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:56,967 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:56,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-19 21:19:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:57,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:57,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:58,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22935452] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:58,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:58,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:58,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923972151] [2022-07-19 21:19:58,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:58,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:58,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:58,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:58,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:58,372 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-19 21:19:58,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 779 places, 695 transitions, 1872 flow. Second operand has 66 states, 66 states have (on average 634.8939393939394) internal successors, (41903), 66 states have internal predecessors, (41903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:58,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:58,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-19 21:19:58,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:59,350 INFO L129 PetriNetUnfolder]: 0/830 cut-off events. [2022-07-19 21:19:59,351 INFO L130 PetriNetUnfolder]: For 1135/1135 co-relation queries the response was YES. [2022-07-19 21:19:59,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 830 events. 0/830 cut-off events. For 1135/1135 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2051 event pairs, 0 based on Foata normal form. 8/838 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2022-07-19 21:19:59,353 INFO L132 encePairwiseOnDemand]: 794/799 looper letters, 69 selfloop transitions, 67 changer transitions 0/744 dead transitions. [2022-07-19 21:19:59,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 744 transitions, 2542 flow [2022-07-19 21:19:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-19 21:19:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-19 21:19:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 43752 transitions. [2022-07-19 21:19:59,370 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7936006965228275 [2022-07-19 21:19:59,371 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 43752 transitions. [2022-07-19 21:19:59,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 43752 transitions. [2022-07-19 21:19:59,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:59,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 43752 transitions. [2022-07-19 21:19:59,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 634.0869565217391) internal successors, (43752), 69 states have internal predecessors, (43752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:59,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 799.0) internal successors, (55930), 70 states have internal predecessors, (55930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:59,440 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 799.0) internal successors, (55930), 70 states have internal predecessors, (55930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:59,441 INFO L186 Difference]: Start difference. First operand has 779 places, 695 transitions, 1872 flow. Second operand 69 states and 43752 transitions. [2022-07-19 21:19:59,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 744 transitions, 2542 flow [2022-07-19 21:19:59,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 744 transitions, 2357 flow, removed 17 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:59,452 INFO L242 Difference]: Finished difference. Result has 801 places, 703 transitions, 1999 flow [2022-07-19 21:19:59,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1999, PETRI_PLACES=801, PETRI_TRANSITIONS=703} [2022-07-19 21:19:59,453 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 93 predicate places. [2022-07-19 21:19:59,453 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 703 transitions, 1999 flow [2022-07-19 21:19:59,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 634.8939393939394) internal successors, (41903), 66 states have internal predecessors, (41903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:59,457 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:59,457 INFO L200 CegarLoopForPetriNet]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:59,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:59,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-07-19 21:19:59,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:59,676 INFO L85 PathProgramCache]: Analyzing trace with hash -153682008, now seen corresponding path program 1 times [2022-07-19 21:19:59,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:59,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418232631] [2022-07-19 21:19:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:59,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:59,702 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:59,740 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:59,741 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:59,741 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:59,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:59,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-07-19 21:19:59,741 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:19:59,742 WARN L231 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:59,742 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2022-07-19 21:19:59,788 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:59,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 737 places, 832 transitions, 2285 flow [2022-07-19 21:20:00,302 INFO L129 PetriNetUnfolder]: 234/1724 cut-off events. [2022-07-19 21:20:00,303 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-19 21:20:00,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 1724 events. 234/1724 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6575 event pairs, 0 based on Foata normal form. 0/1442 useless extension candidates. Maximal degree in co-relation 1944. Up to 48 conditions per place. [2022-07-19 21:20:00,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 737 places, 832 transitions, 2285 flow [2022-07-19 21:20:00,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 737 places, 832 transitions, 2285 flow [2022-07-19 21:20:00,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:00,449 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:20:00,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:00,453 INFO L129 PetriNetUnfolder]: 4/90 cut-off events. [2022-07-19 21:20:00,453 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:00,453 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:00,454 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:00,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1235462759, now seen corresponding path program 1 times [2022-07-19 21:20:00,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:00,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692712648] [2022-07-19 21:20:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:00,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:00,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:00,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692712648] [2022-07-19 21:20:00,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692712648] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:00,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:00,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549606648] [2022-07-19 21:20:00,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:00,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:00,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:00,473 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 659 out of 832 [2022-07-19 21:20:00,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 832 transitions, 2285 flow. Second operand has 3 states, 3 states have (on average 660.0) internal successors, (1980), 3 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:00,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:00,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 659 of 832 [2022-07-19 21:20:00,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:01,046 INFO L129 PetriNetUnfolder]: 0/1441 cut-off events. [2022-07-19 21:20:01,046 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-19 21:20:01,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 1441 events. 0/1441 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6055 event pairs, 0 based on Foata normal form. 9109/10504 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2022-07-19 21:20:01,049 INFO L132 encePairwiseOnDemand]: 687/832 looper letters, 32 selfloop transitions, 2 changer transitions 12/693 dead transitions. [2022-07-19 21:20:01,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 693 transitions, 2075 flow [2022-07-19 21:20:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2161 transitions. [2022-07-19 21:20:01,051 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8657852564102564 [2022-07-19 21:20:01,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2161 transitions. [2022-07-19 21:20:01,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2161 transitions. [2022-07-19 21:20:01,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:01,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2161 transitions. [2022-07-19 21:20:01,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 720.3333333333334) internal successors, (2161), 3 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:01,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:01,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:01,054 INFO L186 Difference]: Start difference. First operand has 737 places, 832 transitions, 2285 flow. Second operand 3 states and 2161 transitions. [2022-07-19 21:20:01,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 693 transitions, 2075 flow [2022-07-19 21:20:01,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 693 transitions, 1569 flow, removed 253 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:01,063 INFO L242 Difference]: Finished difference. Result has 739 places, 678 transitions, 1481 flow [2022-07-19 21:20:01,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1481, PETRI_PLACES=739, PETRI_TRANSITIONS=678} [2022-07-19 21:20:01,064 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 2 predicate places. [2022-07-19 21:20:01,064 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 678 transitions, 1481 flow [2022-07-19 21:20:01,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 660.0) internal successors, (1980), 3 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:01,064 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:01,064 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] [2022-07-19 21:20:01,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-07-19 21:20:01,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1295833056, now seen corresponding path program 1 times [2022-07-19 21:20:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:01,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550624171] [2022-07-19 21:20:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:01,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:01,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:01,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550624171] [2022-07-19 21:20:01,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550624171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:01,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743028819] [2022-07-19 21:20:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:01,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:01,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:01,088 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:01,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-19 21:20:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:01,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:01,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:01,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:01,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743028819] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:01,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:01,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:01,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548414432] [2022-07-19 21:20:01,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:01,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:01,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:01,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:01,649 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-19 21:20:01,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 678 transitions, 1481 flow. Second operand has 10 states, 10 states have (on average 660.3) internal successors, (6603), 10 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:01,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:01,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-19 21:20:01,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:02,172 INFO L129 PetriNetUnfolder]: 0/1139 cut-off events. [2022-07-19 21:20:02,173 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-07-19 21:20:02,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 1139 events. 0/1139 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3924 event pairs, 0 based on Foata normal form. 2/1141 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-19 21:20:02,175 INFO L132 encePairwiseOnDemand]: 826/832 looper letters, 33 selfloop transitions, 9 changer transitions 0/688 dead transitions. [2022-07-19 21:20:02,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 688 transitions, 1587 flow [2022-07-19 21:20:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5966 transitions. [2022-07-19 21:20:02,179 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7967414529914529 [2022-07-19 21:20:02,179 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5966 transitions. [2022-07-19 21:20:02,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5966 transitions. [2022-07-19 21:20:02,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:02,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5966 transitions. [2022-07-19 21:20:02,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 662.8888888888889) internal successors, (5966), 9 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:02,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 832.0) internal successors, (8320), 10 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:02,187 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 832.0) internal successors, (8320), 10 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:02,187 INFO L186 Difference]: Start difference. First operand has 739 places, 678 transitions, 1481 flow. Second operand 9 states and 5966 transitions. [2022-07-19 21:20:02,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 688 transitions, 1587 flow [2022-07-19 21:20:02,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 734 places, 688 transitions, 1585 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:02,195 INFO L242 Difference]: Finished difference. Result has 737 places, 684 transitions, 1529 flow [2022-07-19 21:20:02,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1529, PETRI_PLACES=737, PETRI_TRANSITIONS=684} [2022-07-19 21:20:02,196 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 0 predicate places. [2022-07-19 21:20:02,197 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 684 transitions, 1529 flow [2022-07-19 21:20:02,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 660.3) internal successors, (6603), 10 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:02,197 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:02,197 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] [2022-07-19 21:20:02,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:02,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-07-19 21:20:02,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:02,404 INFO L85 PathProgramCache]: Analyzing trace with hash -766795499, now seen corresponding path program 1 times [2022-07-19 21:20:02,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:02,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482996095] [2022-07-19 21:20:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:02,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:02,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:02,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482996095] [2022-07-19 21:20:02,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482996095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:02,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344347020] [2022-07-19 21:20:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:02,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:02,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:02,449 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:02,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-19 21:20:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:02,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:02,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:02,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:03,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344347020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:03,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:03,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:03,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083129153] [2022-07-19 21:20:03,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:03,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:03,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:03,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:03,039 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-19 21:20:03,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 684 transitions, 1529 flow. Second operand has 18 states, 18 states have (on average 660.6111111111111) internal successors, (11891), 18 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:03,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:03,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-19 21:20:03,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:03,633 INFO L129 PetriNetUnfolder]: 0/1087 cut-off events. [2022-07-19 21:20:03,633 INFO L130 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-07-19 21:20:03,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 1087 events. 0/1087 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3570 event pairs, 0 based on Foata normal form. 4/1091 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-19 21:20:03,635 INFO L132 encePairwiseOnDemand]: 826/832 looper letters, 41 selfloop transitions, 21 changer transitions 0/708 dead transitions. [2022-07-19 21:20:03,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 708 transitions, 1761 flow [2022-07-19 21:20:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13884 transitions. [2022-07-19 21:20:03,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2022-07-19 21:20:03,641 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13884 transitions. [2022-07-19 21:20:03,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13884 transitions. [2022-07-19 21:20:03,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:03,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13884 transitions. [2022-07-19 21:20:03,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 661.1428571428571) internal successors, (13884), 21 states have internal predecessors, (13884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:03,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 832.0) internal successors, (18304), 22 states have internal predecessors, (18304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:03,657 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 832.0) internal successors, (18304), 22 states have internal predecessors, (18304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:03,657 INFO L186 Difference]: Start difference. First operand has 737 places, 684 transitions, 1529 flow. Second operand 21 states and 13884 transitions. [2022-07-19 21:20:03,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 708 transitions, 1761 flow [2022-07-19 21:20:03,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 708 transitions, 1747 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:03,665 INFO L242 Difference]: Finished difference. Result has 761 places, 697 transitions, 1653 flow [2022-07-19 21:20:03,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1653, PETRI_PLACES=761, PETRI_TRANSITIONS=697} [2022-07-19 21:20:03,666 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 24 predicate places. [2022-07-19 21:20:03,666 INFO L495 AbstractCegarLoop]: Abstraction has has 761 places, 697 transitions, 1653 flow [2022-07-19 21:20:03,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 660.6111111111111) internal successors, (11891), 18 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:03,667 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:03,667 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:03,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:03,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:03,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:03,886 INFO L85 PathProgramCache]: Analyzing trace with hash 599763339, now seen corresponding path program 1 times [2022-07-19 21:20:03,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:03,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106272915] [2022-07-19 21:20:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:03,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:04,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:04,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106272915] [2022-07-19 21:20:04,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106272915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:04,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594449362] [2022-07-19 21:20:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:04,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:04,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:04,009 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:04,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-19 21:20:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:04,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:04,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:04,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:04,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594449362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:04,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:04,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:04,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704003119] [2022-07-19 21:20:04,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:04,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:04,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:04,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:04,807 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-19 21:20:04,813 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 761 places, 697 transitions, 1653 flow. Second operand has 34 states, 34 states have (on average 660.7941176470588) internal successors, (22467), 34 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:04,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:04,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-19 21:20:04,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:05,560 INFO L129 PetriNetUnfolder]: 0/983 cut-off events. [2022-07-19 21:20:05,560 INFO L130 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-07-19 21:20:05,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1568 conditions, 983 events. 0/983 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2895 event pairs, 0 based on Foata normal form. 8/991 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-19 21:20:05,562 INFO L132 encePairwiseOnDemand]: 826/832 looper letters, 57 selfloop transitions, 45 changer transitions 0/748 dead transitions. [2022-07-19 21:20:05,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 748 transitions, 2173 flow [2022-07-19 21:20:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 29720 transitions. [2022-07-19 21:20:05,575 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7938034188034188 [2022-07-19 21:20:05,576 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 29720 transitions. [2022-07-19 21:20:05,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 29720 transitions. [2022-07-19 21:20:05,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:05,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 29720 transitions. [2022-07-19 21:20:05,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 660.4444444444445) internal successors, (29720), 45 states have internal predecessors, (29720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:05,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 832.0) internal successors, (38272), 46 states have internal predecessors, (38272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:05,618 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 832.0) internal successors, (38272), 46 states have internal predecessors, (38272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:05,618 INFO L186 Difference]: Start difference. First operand has 761 places, 697 transitions, 1653 flow. Second operand 45 states and 29720 transitions. [2022-07-19 21:20:05,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 805 places, 748 transitions, 2173 flow [2022-07-19 21:20:05,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 799 places, 748 transitions, 2133 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:05,628 INFO L242 Difference]: Finished difference. Result has 808 places, 722 transitions, 1931 flow [2022-07-19 21:20:05,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1931, PETRI_PLACES=808, PETRI_TRANSITIONS=722} [2022-07-19 21:20:05,629 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 71 predicate places. [2022-07-19 21:20:05,629 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 722 transitions, 1931 flow [2022-07-19 21:20:05,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 660.7941176470588) internal successors, (22467), 34 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:05,631 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:05,631 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:05,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-07-19 21:20:05,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-07-19 21:20:05,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash 360184487, now seen corresponding path program 1 times [2022-07-19 21:20:05,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:05,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930296166] [2022-07-19 21:20:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:05,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:06,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:06,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930296166] [2022-07-19 21:20:06,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930296166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:06,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502120039] [2022-07-19 21:20:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:06,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:06,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:06,051 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:06,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-19 21:20:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:06,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:06,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:07,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502120039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:07,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:07,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731424739] [2022-07-19 21:20:07,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:07,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:07,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:07,447 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-19 21:20:07,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 722 transitions, 1931 flow. Second operand has 66 states, 66 states have (on average 660.8939393939394) internal successors, (43619), 66 states have internal predecessors, (43619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:07,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:07,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-19 21:20:07,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:08,469 INFO L129 PetriNetUnfolder]: 0/866 cut-off events. [2022-07-19 21:20:08,469 INFO L130 PetriNetUnfolder]: For 1256/1256 co-relation queries the response was YES. [2022-07-19 21:20:08,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 866 events. 0/866 cut-off events. For 1256/1256 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2149 event pairs, 0 based on Foata normal form. 9/875 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-19 21:20:08,471 INFO L132 encePairwiseOnDemand]: 827/832 looper letters, 72 selfloop transitions, 70 changer transitions 0/776 dead transitions. [2022-07-19 21:20:08,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 776 transitions, 2657 flow [2022-07-19 21:20:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-19 21:20:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-19 21:20:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 47527 transitions. [2022-07-19 21:20:08,492 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7933860844017094 [2022-07-19 21:20:08,492 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 47527 transitions. [2022-07-19 21:20:08,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 47527 transitions. [2022-07-19 21:20:08,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:08,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 47527 transitions. [2022-07-19 21:20:08,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 660.0972222222222) internal successors, (47527), 72 states have internal predecessors, (47527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:08,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 832.0) internal successors, (60736), 73 states have internal predecessors, (60736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:08,571 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 832.0) internal successors, (60736), 73 states have internal predecessors, (60736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:08,571 INFO L186 Difference]: Start difference. First operand has 808 places, 722 transitions, 1931 flow. Second operand 72 states and 47527 transitions. [2022-07-19 21:20:08,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 776 transitions, 2657 flow [2022-07-19 21:20:08,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 776 transitions, 2464 flow, removed 18 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:08,583 INFO L242 Difference]: Finished difference. Result has 833 places, 733 transitions, 2087 flow [2022-07-19 21:20:08,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2087, PETRI_PLACES=833, PETRI_TRANSITIONS=733} [2022-07-19 21:20:08,584 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 96 predicate places. [2022-07-19 21:20:08,584 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 733 transitions, 2087 flow [2022-07-19 21:20:08,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 660.8939393939394) internal successors, (43619), 66 states have internal predecessors, (43619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:08,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:08,588 INFO L200 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:08,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:08,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:08,808 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:08,809 INFO L85 PathProgramCache]: Analyzing trace with hash -134735529, now seen corresponding path program 1 times [2022-07-19 21:20:08,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:08,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967946776] [2022-07-19 21:20:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:08,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:08,838 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:08,879 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:08,879 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:08,879 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:08,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:08,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-07-19 21:20:08,880 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:20:08,880 WARN L231 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:08,880 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2022-07-19 21:20:08,920 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:08,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 766 places, 865 transitions, 2402 flow [2022-07-19 21:20:09,455 INFO L129 PetriNetUnfolder]: 244/1796 cut-off events. [2022-07-19 21:20:09,460 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-19 21:20:09,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 1796 events. 244/1796 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6875 event pairs, 0 based on Foata normal form. 0/1502 useless extension candidates. Maximal degree in co-relation 2042. Up to 50 conditions per place. [2022-07-19 21:20:09,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 766 places, 865 transitions, 2402 flow [2022-07-19 21:20:09,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 766 places, 865 transitions, 2402 flow [2022-07-19 21:20:09,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:09,623 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:20:09,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:09,627 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2022-07-19 21:20:09,627 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:09,627 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:09,627 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:09,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1513814343, now seen corresponding path program 1 times [2022-07-19 21:20:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:09,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781383438] [2022-07-19 21:20:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:09,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:09,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781383438] [2022-07-19 21:20:09,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781383438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:09,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:09,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:09,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095373277] [2022-07-19 21:20:09,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:09,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:09,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:09,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:09,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:09,649 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 685 out of 865 [2022-07-19 21:20:09,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 865 transitions, 2402 flow. Second operand has 3 states, 3 states have (on average 686.0) internal successors, (2058), 3 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:09,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:09,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 685 of 865 [2022-07-19 21:20:09,650 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:10,311 INFO L129 PetriNetUnfolder]: 0/1502 cut-off events. [2022-07-19 21:20:10,312 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-19 21:20:10,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2024 conditions, 1502 events. 0/1502 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6276 event pairs, 0 based on Foata normal form. 9937/11391 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2022-07-19 21:20:10,314 INFO L132 encePairwiseOnDemand]: 714/865 looper letters, 33 selfloop transitions, 2 changer transitions 12/720 dead transitions. [2022-07-19 21:20:10,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 720 transitions, 2182 flow [2022-07-19 21:20:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2246 transitions. [2022-07-19 21:20:10,316 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8655105973025048 [2022-07-19 21:20:10,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2246 transitions. [2022-07-19 21:20:10,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2246 transitions. [2022-07-19 21:20:10,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:10,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2246 transitions. [2022-07-19 21:20:10,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 748.6666666666666) internal successors, (2246), 3 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:10,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 865.0) internal successors, (3460), 4 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:10,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 865.0) internal successors, (3460), 4 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:10,320 INFO L186 Difference]: Start difference. First operand has 766 places, 865 transitions, 2402 flow. Second operand 3 states and 2246 transitions. [2022-07-19 21:20:10,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 720 transitions, 2182 flow [2022-07-19 21:20:10,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 720 transitions, 1630 flow, removed 276 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:10,333 INFO L242 Difference]: Finished difference. Result has 768 places, 705 transitions, 1540 flow [2022-07-19 21:20:10,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1540, PETRI_PLACES=768, PETRI_TRANSITIONS=705} [2022-07-19 21:20:10,334 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 2 predicate places. [2022-07-19 21:20:10,334 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 705 transitions, 1540 flow [2022-07-19 21:20:10,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 686.0) internal successors, (2058), 3 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:10,335 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:10,335 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] [2022-07-19 21:20:10,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-07-19 21:20:10,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1822420096, now seen corresponding path program 1 times [2022-07-19 21:20:10,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:10,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899831165] [2022-07-19 21:20:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:10,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:10,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:10,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899831165] [2022-07-19 21:20:10,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899831165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:10,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043938771] [2022-07-19 21:20:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:10,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:10,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:10,372 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:10,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-19 21:20:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:10,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:10,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:10,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:10,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043938771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:10,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:10,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:10,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061177007] [2022-07-19 21:20:10,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:10,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:10,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:10,970 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-19 21:20:10,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 705 transitions, 1540 flow. Second operand has 10 states, 10 states have (on average 686.3) internal successors, (6863), 10 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:10,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:10,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-19 21:20:10,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:11,489 INFO L129 PetriNetUnfolder]: 0/1188 cut-off events. [2022-07-19 21:20:11,490 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-19 21:20:11,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 1188 events. 0/1188 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4105 event pairs, 0 based on Foata normal form. 2/1190 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-19 21:20:11,492 INFO L132 encePairwiseOnDemand]: 859/865 looper letters, 34 selfloop transitions, 9 changer transitions 0/715 dead transitions. [2022-07-19 21:20:11,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 715 transitions, 1648 flow [2022-07-19 21:20:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6201 transitions. [2022-07-19 21:20:11,495 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7965317919075144 [2022-07-19 21:20:11,495 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6201 transitions. [2022-07-19 21:20:11,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6201 transitions. [2022-07-19 21:20:11,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:11,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6201 transitions. [2022-07-19 21:20:11,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 689.0) internal successors, (6201), 9 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:11,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 865.0) internal successors, (8650), 10 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:11,503 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 865.0) internal successors, (8650), 10 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:11,503 INFO L186 Difference]: Start difference. First operand has 768 places, 705 transitions, 1540 flow. Second operand 9 states and 6201 transitions. [2022-07-19 21:20:11,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 715 transitions, 1648 flow [2022-07-19 21:20:11,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 715 transitions, 1646 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:11,510 INFO L242 Difference]: Finished difference. Result has 766 places, 711 transitions, 1588 flow [2022-07-19 21:20:11,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1588, PETRI_PLACES=766, PETRI_TRANSITIONS=711} [2022-07-19 21:20:11,511 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 0 predicate places. [2022-07-19 21:20:11,511 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 711 transitions, 1588 flow [2022-07-19 21:20:11,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 686.3) internal successors, (6863), 10 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:11,512 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:11,512 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] [2022-07-19 21:20:11,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-07-19 21:20:11,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-07-19 21:20:11,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash 329246261, now seen corresponding path program 1 times [2022-07-19 21:20:11,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:11,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77657978] [2022-07-19 21:20:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:11,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:11,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:11,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77657978] [2022-07-19 21:20:11,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77657978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:11,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563329551] [2022-07-19 21:20:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:11,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:11,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:11,769 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:11,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-19 21:20:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:12,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:12,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:12,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563329551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:12,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:12,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:12,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415526671] [2022-07-19 21:20:12,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:12,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:12,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:12,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:12,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:12,418 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-19 21:20:12,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 711 transitions, 1588 flow. Second operand has 18 states, 18 states have (on average 686.6111111111111) internal successors, (12359), 18 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:12,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:12,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-19 21:20:12,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:13,081 INFO L129 PetriNetUnfolder]: 0/1136 cut-off events. [2022-07-19 21:20:13,081 INFO L130 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-07-19 21:20:13,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 1136 events. 0/1136 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3761 event pairs, 0 based on Foata normal form. 4/1140 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-19 21:20:13,083 INFO L132 encePairwiseOnDemand]: 859/865 looper letters, 42 selfloop transitions, 21 changer transitions 0/735 dead transitions. [2022-07-19 21:20:13,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 735 transitions, 1822 flow [2022-07-19 21:20:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14431 transitions. [2022-07-19 21:20:13,089 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7944398568676025 [2022-07-19 21:20:13,089 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14431 transitions. [2022-07-19 21:20:13,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14431 transitions. [2022-07-19 21:20:13,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:13,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14431 transitions. [2022-07-19 21:20:13,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 687.1904761904761) internal successors, (14431), 21 states have internal predecessors, (14431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:13,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 865.0) internal successors, (19030), 22 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:13,105 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 865.0) internal successors, (19030), 22 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:13,105 INFO L186 Difference]: Start difference. First operand has 766 places, 711 transitions, 1588 flow. Second operand 21 states and 14431 transitions. [2022-07-19 21:20:13,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 735 transitions, 1822 flow [2022-07-19 21:20:13,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 735 transitions, 1808 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:13,113 INFO L242 Difference]: Finished difference. Result has 790 places, 724 transitions, 1712 flow [2022-07-19 21:20:13,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1712, PETRI_PLACES=790, PETRI_TRANSITIONS=724} [2022-07-19 21:20:13,113 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 24 predicate places. [2022-07-19 21:20:13,113 INFO L495 AbstractCegarLoop]: Abstraction has has 790 places, 724 transitions, 1712 flow [2022-07-19 21:20:13,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 686.6111111111111) internal successors, (12359), 18 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:13,115 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:13,115 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:13,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:13,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-07-19 21:20:13,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:13,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1297432149, now seen corresponding path program 1 times [2022-07-19 21:20:13,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:13,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265290376] [2022-07-19 21:20:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:13,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:13,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:13,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265290376] [2022-07-19 21:20:13,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265290376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:13,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908356624] [2022-07-19 21:20:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:13,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:13,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:13,442 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:13,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-19 21:20:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:14,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:14,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:14,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:14,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908356624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:14,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:14,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:14,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36168831] [2022-07-19 21:20:14,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:14,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:14,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:14,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:14,340 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-19 21:20:14,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 724 transitions, 1712 flow. Second operand has 34 states, 34 states have (on average 686.7941176470588) internal successors, (23351), 34 states have internal predecessors, (23351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:14,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:14,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-19 21:20:14,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:15,092 INFO L129 PetriNetUnfolder]: 0/1032 cut-off events. [2022-07-19 21:20:15,093 INFO L130 PetriNetUnfolder]: For 519/519 co-relation queries the response was YES. [2022-07-19 21:20:15,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1647 conditions, 1032 events. 0/1032 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3077 event pairs, 0 based on Foata normal form. 8/1040 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2022-07-19 21:20:15,095 INFO L132 encePairwiseOnDemand]: 859/865 looper letters, 58 selfloop transitions, 45 changer transitions 0/775 dead transitions. [2022-07-19 21:20:15,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 775 transitions, 2234 flow [2022-07-19 21:20:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 30891 transitions. [2022-07-19 21:20:15,108 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7936030828516377 [2022-07-19 21:20:15,108 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 30891 transitions. [2022-07-19 21:20:15,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 30891 transitions. [2022-07-19 21:20:15,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:15,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 30891 transitions. [2022-07-19 21:20:15,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 686.4666666666667) internal successors, (30891), 45 states have internal predecessors, (30891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:15,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 865.0) internal successors, (39790), 46 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:15,147 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 865.0) internal successors, (39790), 46 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:15,147 INFO L186 Difference]: Start difference. First operand has 790 places, 724 transitions, 1712 flow. Second operand 45 states and 30891 transitions. [2022-07-19 21:20:15,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 775 transitions, 2234 flow [2022-07-19 21:20:15,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 775 transitions, 2194 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:15,157 INFO L242 Difference]: Finished difference. Result has 837 places, 749 transitions, 1990 flow [2022-07-19 21:20:15,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1990, PETRI_PLACES=837, PETRI_TRANSITIONS=749} [2022-07-19 21:20:15,158 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 71 predicate places. [2022-07-19 21:20:15,158 INFO L495 AbstractCegarLoop]: Abstraction has has 837 places, 749 transitions, 1990 flow [2022-07-19 21:20:15,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 686.7941176470588) internal successors, (23351), 34 states have internal predecessors, (23351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:15,160 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:15,160 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:15,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:15,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:15,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:15,380 INFO L85 PathProgramCache]: Analyzing trace with hash -622610233, now seen corresponding path program 1 times [2022-07-19 21:20:15,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:15,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761836604] [2022-07-19 21:20:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:15,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:15,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:15,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761836604] [2022-07-19 21:20:15,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761836604] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:15,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634060702] [2022-07-19 21:20:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:15,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:15,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:15,673 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:15,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-19 21:20:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:16,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:16,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:17,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634060702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:17,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:17,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:17,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581428430] [2022-07-19 21:20:17,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:17,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:17,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:17,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:17,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:17,096 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-19 21:20:17,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 837 places, 749 transitions, 1990 flow. Second operand has 66 states, 66 states have (on average 686.8939393939394) internal successors, (45335), 66 states have internal predecessors, (45335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:17,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:17,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-19 21:20:17,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:18,562 INFO L129 PetriNetUnfolder]: 0/902 cut-off events. [2022-07-19 21:20:18,563 INFO L130 PetriNetUnfolder]: For 1377/1377 co-relation queries the response was YES. [2022-07-19 21:20:18,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 902 events. 0/902 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2247 event pairs, 0 based on Foata normal form. 10/912 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2022-07-19 21:20:18,564 INFO L132 encePairwiseOnDemand]: 860/865 looper letters, 75 selfloop transitions, 73 changer transitions 0/808 dead transitions. [2022-07-19 21:20:18,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 808 transitions, 2772 flow [2022-07-19 21:20:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-19 21:20:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-19 21:20:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 51458 transitions. [2022-07-19 21:20:18,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931868978805395 [2022-07-19 21:20:18,585 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 51458 transitions. [2022-07-19 21:20:18,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 51458 transitions. [2022-07-19 21:20:18,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:18,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 51458 transitions. [2022-07-19 21:20:18,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 686.1066666666667) internal successors, (51458), 75 states have internal predecessors, (51458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:18,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 865.0) internal successors, (65740), 76 states have internal predecessors, (65740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:18,666 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 865.0) internal successors, (65740), 76 states have internal predecessors, (65740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:18,667 INFO L186 Difference]: Start difference. First operand has 837 places, 749 transitions, 1990 flow. Second operand 75 states and 51458 transitions. [2022-07-19 21:20:18,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 808 transitions, 2772 flow [2022-07-19 21:20:18,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 865 places, 808 transitions, 2571 flow, removed 19 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:18,678 INFO L242 Difference]: Finished difference. Result has 865 places, 763 transitions, 2175 flow [2022-07-19 21:20:18,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=2175, PETRI_PLACES=865, PETRI_TRANSITIONS=763} [2022-07-19 21:20:18,679 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 99 predicate places. [2022-07-19 21:20:18,679 INFO L495 AbstractCegarLoop]: Abstraction has has 865 places, 763 transitions, 2175 flow [2022-07-19 21:20:18,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 686.8939393939394) internal successors, (45335), 66 states have internal predecessors, (45335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:18,684 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:18,684 INFO L200 CegarLoopForPetriNet]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:18,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:18,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:18,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash -762434393, now seen corresponding path program 1 times [2022-07-19 21:20:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:18,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224712143] [2022-07-19 21:20:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:18,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:18,935 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:18,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:18,991 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:18,991 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:18,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:18,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-07-19 21:20:18,992 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:20:18,992 WARN L231 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:18,992 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2022-07-19 21:20:19,034 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:19,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 795 places, 898 transitions, 2521 flow [2022-07-19 21:20:19,592 INFO L129 PetriNetUnfolder]: 254/1868 cut-off events. [2022-07-19 21:20:19,592 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-19 21:20:19,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 1868 events. 254/1868 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7144 event pairs, 0 based on Foata normal form. 0/1562 useless extension candidates. Maximal degree in co-relation 2141. Up to 52 conditions per place. [2022-07-19 21:20:19,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 795 places, 898 transitions, 2521 flow [2022-07-19 21:20:19,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 795 places, 898 transitions, 2521 flow [2022-07-19 21:20:19,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:19,770 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:20:19,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:19,774 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-19 21:20:19,774 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:19,774 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:19,774 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:19,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash -764264697, now seen corresponding path program 1 times [2022-07-19 21:20:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:19,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190235747] [2022-07-19 21:20:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:19,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:19,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190235747] [2022-07-19 21:20:19,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190235747] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:19,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:19,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:19,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470921869] [2022-07-19 21:20:19,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:19,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:19,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:19,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:19,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:19,793 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 711 out of 898 [2022-07-19 21:20:19,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 898 transitions, 2521 flow. Second operand has 3 states, 3 states have (on average 712.0) internal successors, (2136), 3 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:19,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:19,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 711 of 898 [2022-07-19 21:20:19,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:20,418 INFO L129 PetriNetUnfolder]: 0/1563 cut-off events. [2022-07-19 21:20:20,418 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-19 21:20:20,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2119 conditions, 1563 events. 0/1563 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6564 event pairs, 0 based on Foata normal form. 10799/12312 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2022-07-19 21:20:20,421 INFO L132 encePairwiseOnDemand]: 741/898 looper letters, 34 selfloop transitions, 2 changer transitions 12/747 dead transitions. [2022-07-19 21:20:20,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 747 transitions, 2291 flow [2022-07-19 21:20:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2331 transitions. [2022-07-19 21:20:20,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8652561247216035 [2022-07-19 21:20:20,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2331 transitions. [2022-07-19 21:20:20,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2331 transitions. [2022-07-19 21:20:20,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:20,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2331 transitions. [2022-07-19 21:20:20,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 777.0) internal successors, (2331), 3 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:20,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 898.0) internal successors, (3592), 4 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:20,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 898.0) internal successors, (3592), 4 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:20,428 INFO L186 Difference]: Start difference. First operand has 795 places, 898 transitions, 2521 flow. Second operand 3 states and 2331 transitions. [2022-07-19 21:20:20,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 747 transitions, 2291 flow [2022-07-19 21:20:20,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 796 places, 747 transitions, 1691 flow, removed 300 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:20,440 INFO L242 Difference]: Finished difference. Result has 797 places, 732 transitions, 1599 flow [2022-07-19 21:20:20,441 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1599, PETRI_PLACES=797, PETRI_TRANSITIONS=732} [2022-07-19 21:20:20,441 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 2 predicate places. [2022-07-19 21:20:20,441 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 732 transitions, 1599 flow [2022-07-19 21:20:20,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 712.0) internal successors, (2136), 3 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:20,442 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:20,442 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] [2022-07-19 21:20:20,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-07-19 21:20:20,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:20,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1670188384, now seen corresponding path program 1 times [2022-07-19 21:20:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:20,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075314580] [2022-07-19 21:20:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:20,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:20,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:20,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075314580] [2022-07-19 21:20:20,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075314580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:20,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375165186] [2022-07-19 21:20:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:20,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:20,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:20,472 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:20,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-19 21:20:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:21,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:21,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:21,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:21,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375165186] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:21,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:21,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:21,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513548846] [2022-07-19 21:20:21,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:21,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:21,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:21,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:21,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:21,146 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-19 21:20:21,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 732 transitions, 1599 flow. Second operand has 10 states, 10 states have (on average 712.3) internal successors, (7123), 10 states have internal predecessors, (7123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:21,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:21,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-19 21:20:21,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:21,779 INFO L129 PetriNetUnfolder]: 0/1237 cut-off events. [2022-07-19 21:20:21,779 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-07-19 21:20:21,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1568 conditions, 1237 events. 0/1237 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4282 event pairs, 0 based on Foata normal form. 2/1239 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-07-19 21:20:21,782 INFO L132 encePairwiseOnDemand]: 892/898 looper letters, 35 selfloop transitions, 9 changer transitions 0/742 dead transitions. [2022-07-19 21:20:21,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 742 transitions, 1709 flow [2022-07-19 21:20:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6436 transitions. [2022-07-19 21:20:21,785 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7963375402128187 [2022-07-19 21:20:21,785 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6436 transitions. [2022-07-19 21:20:21,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6436 transitions. [2022-07-19 21:20:21,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:21,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6436 transitions. [2022-07-19 21:20:21,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 715.1111111111111) internal successors, (6436), 9 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:21,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 898.0) internal successors, (8980), 10 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:21,794 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 898.0) internal successors, (8980), 10 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:21,794 INFO L186 Difference]: Start difference. First operand has 797 places, 732 transitions, 1599 flow. Second operand 9 states and 6436 transitions. [2022-07-19 21:20:21,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 742 transitions, 1709 flow [2022-07-19 21:20:21,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 742 transitions, 1707 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:21,802 INFO L242 Difference]: Finished difference. Result has 795 places, 738 transitions, 1647 flow [2022-07-19 21:20:21,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1647, PETRI_PLACES=795, PETRI_TRANSITIONS=738} [2022-07-19 21:20:21,803 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 0 predicate places. [2022-07-19 21:20:21,803 INFO L495 AbstractCegarLoop]: Abstraction has has 795 places, 738 transitions, 1647 flow [2022-07-19 21:20:21,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 712.3) internal successors, (7123), 10 states have internal predecessors, (7123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:21,804 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:21,804 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] [2022-07-19 21:20:21,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:22,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:22,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:22,005 INFO L85 PathProgramCache]: Analyzing trace with hash -707309547, now seen corresponding path program 1 times [2022-07-19 21:20:22,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:22,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553224332] [2022-07-19 21:20:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:22,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:22,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553224332] [2022-07-19 21:20:22,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553224332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166646686] [2022-07-19 21:20:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:22,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:22,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:22,050 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:22,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-19 21:20:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:22,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:22,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:22,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166646686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:22,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:22,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:22,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487726940] [2022-07-19 21:20:22,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:22,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:22,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:22,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:22,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:22,759 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-19 21:20:22,762 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 738 transitions, 1647 flow. Second operand has 18 states, 18 states have (on average 712.6111111111111) internal successors, (12827), 18 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:22,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:22,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-19 21:20:22,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:23,409 INFO L129 PetriNetUnfolder]: 0/1185 cut-off events. [2022-07-19 21:20:23,409 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-07-19 21:20:23,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1697 conditions, 1185 events. 0/1185 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3945 event pairs, 0 based on Foata normal form. 4/1189 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-19 21:20:23,411 INFO L132 encePairwiseOnDemand]: 892/898 looper letters, 43 selfloop transitions, 21 changer transitions 0/762 dead transitions. [2022-07-19 21:20:23,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 762 transitions, 1883 flow [2022-07-19 21:20:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14978 transitions. [2022-07-19 21:20:23,418 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7942517764344045 [2022-07-19 21:20:23,418 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14978 transitions. [2022-07-19 21:20:23,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14978 transitions. [2022-07-19 21:20:23,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:23,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14978 transitions. [2022-07-19 21:20:23,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 713.2380952380952) internal successors, (14978), 21 states have internal predecessors, (14978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:23,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 898.0) internal successors, (19756), 22 states have internal predecessors, (19756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:23,438 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 898.0) internal successors, (19756), 22 states have internal predecessors, (19756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:23,438 INFO L186 Difference]: Start difference. First operand has 795 places, 738 transitions, 1647 flow. Second operand 21 states and 14978 transitions. [2022-07-19 21:20:23,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 762 transitions, 1883 flow [2022-07-19 21:20:23,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 762 transitions, 1869 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:23,447 INFO L242 Difference]: Finished difference. Result has 819 places, 751 transitions, 1771 flow [2022-07-19 21:20:23,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1771, PETRI_PLACES=819, PETRI_TRANSITIONS=751} [2022-07-19 21:20:23,448 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 24 predicate places. [2022-07-19 21:20:23,448 INFO L495 AbstractCegarLoop]: Abstraction has has 819 places, 751 transitions, 1771 flow [2022-07-19 21:20:23,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 712.6111111111111) internal successors, (12827), 18 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:23,450 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:23,450 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:23,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:23,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-07-19 21:20:23,653 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:23,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1350000373, now seen corresponding path program 1 times [2022-07-19 21:20:23,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:23,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793787910] [2022-07-19 21:20:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:23,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:23,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:23,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793787910] [2022-07-19 21:20:23,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793787910] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:23,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063018729] [2022-07-19 21:20:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:23,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:23,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:23,763 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:23,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-19 21:20:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:24,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:24,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:24,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:24,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063018729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:24,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:24,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:24,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391418124] [2022-07-19 21:20:24,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:24,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:24,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:24,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:24,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:24,615 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-19 21:20:24,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 819 places, 751 transitions, 1771 flow. Second operand has 34 states, 34 states have (on average 712.7941176470588) internal successors, (24235), 34 states have internal predecessors, (24235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:24,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:24,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-19 21:20:24,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:25,606 INFO L129 PetriNetUnfolder]: 0/1081 cut-off events. [2022-07-19 21:20:25,606 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-19 21:20:25,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 1081 events. 0/1081 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3256 event pairs, 0 based on Foata normal form. 8/1089 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-19 21:20:25,608 INFO L132 encePairwiseOnDemand]: 892/898 looper letters, 59 selfloop transitions, 45 changer transitions 0/802 dead transitions. [2022-07-19 21:20:25,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 863 places, 802 transitions, 2295 flow [2022-07-19 21:20:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 32062 transitions. [2022-07-19 21:20:25,625 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934174709230388 [2022-07-19 21:20:25,625 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 32062 transitions. [2022-07-19 21:20:25,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 32062 transitions. [2022-07-19 21:20:25,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:25,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 32062 transitions. [2022-07-19 21:20:25,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 712.4888888888889) internal successors, (32062), 45 states have internal predecessors, (32062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:25,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 898.0) internal successors, (41308), 46 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:25,680 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 898.0) internal successors, (41308), 46 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:25,680 INFO L186 Difference]: Start difference. First operand has 819 places, 751 transitions, 1771 flow. Second operand 45 states and 32062 transitions. [2022-07-19 21:20:25,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 863 places, 802 transitions, 2295 flow [2022-07-19 21:20:25,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 857 places, 802 transitions, 2255 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:25,699 INFO L242 Difference]: Finished difference. Result has 866 places, 776 transitions, 2049 flow [2022-07-19 21:20:25,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2049, PETRI_PLACES=866, PETRI_TRANSITIONS=776} [2022-07-19 21:20:25,699 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 71 predicate places. [2022-07-19 21:20:25,700 INFO L495 AbstractCegarLoop]: Abstraction has has 866 places, 776 transitions, 2049 flow [2022-07-19 21:20:25,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 712.7941176470588) internal successors, (24235), 34 states have internal predecessors, (24235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:25,702 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:25,702 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:25,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:25,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:25,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash 667157287, now seen corresponding path program 1 times [2022-07-19 21:20:25,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:25,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843876930] [2022-07-19 21:20:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:25,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:26,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:26,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843876930] [2022-07-19 21:20:26,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843876930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:26,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417547903] [2022-07-19 21:20:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:26,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:26,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:26,240 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:26,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-19 21:20:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:26,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:26,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:26,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:27,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417547903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:27,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:27,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:27,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997837021] [2022-07-19 21:20:27,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:27,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:27,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:27,791 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-19 21:20:27,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 866 places, 776 transitions, 2049 flow. Second operand has 66 states, 66 states have (on average 712.8939393939394) internal successors, (47051), 66 states have internal predecessors, (47051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:27,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:27,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-19 21:20:27,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:29,339 INFO L129 PetriNetUnfolder]: 0/938 cut-off events. [2022-07-19 21:20:29,339 INFO L130 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2022-07-19 21:20:29,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 938 events. 0/938 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2345 event pairs, 0 based on Foata normal form. 11/949 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2022-07-19 21:20:29,341 INFO L132 encePairwiseOnDemand]: 893/898 looper letters, 78 selfloop transitions, 76 changer transitions 0/840 dead transitions. [2022-07-19 21:20:29,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 840 transitions, 2887 flow [2022-07-19 21:20:29,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-19 21:20:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-19 21:20:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 55545 transitions. [2022-07-19 21:20:29,362 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930015418879561 [2022-07-19 21:20:29,363 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 55545 transitions. [2022-07-19 21:20:29,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 55545 transitions. [2022-07-19 21:20:29,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:29,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 55545 transitions. [2022-07-19 21:20:29,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 712.1153846153846) internal successors, (55545), 78 states have internal predecessors, (55545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:29,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 898.0) internal successors, (70942), 79 states have internal predecessors, (70942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:29,457 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 898.0) internal successors, (70942), 79 states have internal predecessors, (70942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:29,458 INFO L186 Difference]: Start difference. First operand has 866 places, 776 transitions, 2049 flow. Second operand 78 states and 55545 transitions. [2022-07-19 21:20:29,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 840 transitions, 2887 flow [2022-07-19 21:20:29,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 840 transitions, 2678 flow, removed 20 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:29,487 INFO L242 Difference]: Finished difference. Result has 897 places, 793 transitions, 2263 flow [2022-07-19 21:20:29,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2263, PETRI_PLACES=897, PETRI_TRANSITIONS=793} [2022-07-19 21:20:29,492 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 102 predicate places. [2022-07-19 21:20:29,492 INFO L495 AbstractCegarLoop]: Abstraction has has 897 places, 793 transitions, 2263 flow [2022-07-19 21:20:29,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 712.8939393939394) internal successors, (47051), 66 states have internal predecessors, (47051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:29,505 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:29,505 INFO L200 CegarLoopForPetriNet]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:29,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-07-19 21:20:29,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:29,706 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash 271882808, now seen corresponding path program 1 times [2022-07-19 21:20:29,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:29,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088970706] [2022-07-19 21:20:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:29,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:29,737 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:29,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:29,820 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:29,820 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:29,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:29,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-07-19 21:20:29,820 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:20:29,821 WARN L231 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:29,821 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2022-07-19 21:20:29,861 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:29,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 824 places, 931 transitions, 2642 flow [2022-07-19 21:20:30,572 INFO L129 PetriNetUnfolder]: 264/1940 cut-off events. [2022-07-19 21:20:30,572 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-19 21:20:30,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2370 conditions, 1940 events. 264/1940 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7312 event pairs, 0 based on Foata normal form. 0/1622 useless extension candidates. Maximal degree in co-relation 2241. Up to 54 conditions per place. [2022-07-19 21:20:30,640 INFO L82 GeneralOperation]: Start removeDead. Operand has 824 places, 931 transitions, 2642 flow [2022-07-19 21:20:30,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 824 places, 931 transitions, 2642 flow [2022-07-19 21:20:30,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:30,673 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:20:30,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:30,677 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-19 21:20:30,677 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:30,677 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:30,677 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:30,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:30,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:30,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1303807065, now seen corresponding path program 1 times [2022-07-19 21:20:30,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:30,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669848914] [2022-07-19 21:20:30,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:30,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:30,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:30,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669848914] [2022-07-19 21:20:30,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669848914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:30,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:30,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:30,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896510416] [2022-07-19 21:20:30,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:30,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:30,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:30,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:30,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:30,697 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 737 out of 931 [2022-07-19 21:20:30,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 931 transitions, 2642 flow. Second operand has 3 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:30,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:30,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 737 of 931 [2022-07-19 21:20:30,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:31,492 INFO L129 PetriNetUnfolder]: 0/1624 cut-off events. [2022-07-19 21:20:31,492 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-19 21:20:31,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2215 conditions, 1624 events. 0/1624 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6846 event pairs, 0 based on Foata normal form. 11699/13271 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2022-07-19 21:20:31,495 INFO L132 encePairwiseOnDemand]: 768/931 looper letters, 35 selfloop transitions, 2 changer transitions 12/774 dead transitions. [2022-07-19 21:20:31,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 774 transitions, 2402 flow [2022-07-19 21:20:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-19 21:20:31,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8650196920873613 [2022-07-19 21:20:31,498 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-19 21:20:31,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-19 21:20:31,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:31,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-19 21:20:31,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:31,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 931.0) internal successors, (3724), 4 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:31,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 931.0) internal successors, (3724), 4 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:31,501 INFO L186 Difference]: Start difference. First operand has 824 places, 931 transitions, 2642 flow. Second operand 3 states and 2416 transitions. [2022-07-19 21:20:31,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 774 transitions, 2402 flow [2022-07-19 21:20:31,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 774 transitions, 1752 flow, removed 325 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:31,513 INFO L242 Difference]: Finished difference. Result has 826 places, 759 transitions, 1658 flow [2022-07-19 21:20:31,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1658, PETRI_PLACES=826, PETRI_TRANSITIONS=759} [2022-07-19 21:20:31,514 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 2 predicate places. [2022-07-19 21:20:31,514 INFO L495 AbstractCegarLoop]: Abstraction has has 826 places, 759 transitions, 1658 flow [2022-07-19 21:20:31,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:31,514 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:31,514 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] [2022-07-19 21:20:31,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-07-19 21:20:31,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:31,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:31,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1752528192, now seen corresponding path program 1 times [2022-07-19 21:20:31,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:31,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571046526] [2022-07-19 21:20:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:31,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:31,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571046526] [2022-07-19 21:20:31,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571046526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909379081] [2022-07-19 21:20:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:31,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:31,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:31,542 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:31,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-19 21:20:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:32,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:32,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:32,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:32,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909379081] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:32,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:32,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:32,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762988999] [2022-07-19 21:20:32,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:32,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:32,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:32,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:32,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:32,181 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-19 21:20:32,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 759 transitions, 1658 flow. Second operand has 10 states, 10 states have (on average 738.3) internal successors, (7383), 10 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:32,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:32,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-19 21:20:32,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:32,919 INFO L129 PetriNetUnfolder]: 0/1286 cut-off events. [2022-07-19 21:20:32,919 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-19 21:20:32,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1630 conditions, 1286 events. 0/1286 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4473 event pairs, 0 based on Foata normal form. 2/1288 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-07-19 21:20:32,921 INFO L132 encePairwiseOnDemand]: 925/931 looper letters, 36 selfloop transitions, 9 changer transitions 0/769 dead transitions. [2022-07-19 21:20:32,921 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 769 transitions, 1770 flow [2022-07-19 21:20:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6671 transitions. [2022-07-19 21:20:32,925 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7961570593149541 [2022-07-19 21:20:32,925 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6671 transitions. [2022-07-19 21:20:32,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6671 transitions. [2022-07-19 21:20:32,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:32,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6671 transitions. [2022-07-19 21:20:32,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 741.2222222222222) internal successors, (6671), 9 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:32,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 931.0) internal successors, (9310), 10 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:32,933 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 931.0) internal successors, (9310), 10 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:32,934 INFO L186 Difference]: Start difference. First operand has 826 places, 759 transitions, 1658 flow. Second operand 9 states and 6671 transitions. [2022-07-19 21:20:32,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 769 transitions, 1770 flow [2022-07-19 21:20:32,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 769 transitions, 1768 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:32,941 INFO L242 Difference]: Finished difference. Result has 824 places, 765 transitions, 1706 flow [2022-07-19 21:20:32,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1706, PETRI_PLACES=824, PETRI_TRANSITIONS=765} [2022-07-19 21:20:32,942 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 0 predicate places. [2022-07-19 21:20:32,942 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 765 transitions, 1706 flow [2022-07-19 21:20:32,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 738.3) internal successors, (7383), 10 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:32,943 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:32,943 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] [2022-07-19 21:20:32,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:33,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-07-19 21:20:33,162 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:33,162 INFO L85 PathProgramCache]: Analyzing trace with hash 418504373, now seen corresponding path program 1 times [2022-07-19 21:20:33,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:33,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498862317] [2022-07-19 21:20:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:33,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:33,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:33,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498862317] [2022-07-19 21:20:33,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498862317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:33,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738137541] [2022-07-19 21:20:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:33,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:33,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:33,207 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:33,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-19 21:20:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:33,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:33,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:33,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:33,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738137541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:33,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:33,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:33,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14093039] [2022-07-19 21:20:33,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:33,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:33,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:33,926 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-19 21:20:33,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 765 transitions, 1706 flow. Second operand has 18 states, 18 states have (on average 738.6111111111111) internal successors, (13295), 18 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:33,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-19 21:20:33,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:34,636 INFO L129 PetriNetUnfolder]: 0/1234 cut-off events. [2022-07-19 21:20:34,637 INFO L130 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-07-19 21:20:34,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 1234 events. 0/1234 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4116 event pairs, 0 based on Foata normal form. 4/1238 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-19 21:20:34,640 INFO L132 encePairwiseOnDemand]: 925/931 looper letters, 44 selfloop transitions, 21 changer transitions 0/789 dead transitions. [2022-07-19 21:20:34,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 789 transitions, 1944 flow [2022-07-19 21:20:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 15525 transitions. [2022-07-19 21:20:34,647 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940770293079638 [2022-07-19 21:20:34,648 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 15525 transitions. [2022-07-19 21:20:34,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 15525 transitions. [2022-07-19 21:20:34,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:34,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 15525 transitions. [2022-07-19 21:20:34,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 739.2857142857143) internal successors, (15525), 21 states have internal predecessors, (15525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:34,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 931.0) internal successors, (20482), 22 states have internal predecessors, (20482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:34,667 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 931.0) internal successors, (20482), 22 states have internal predecessors, (20482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:34,667 INFO L186 Difference]: Start difference. First operand has 824 places, 765 transitions, 1706 flow. Second operand 21 states and 15525 transitions. [2022-07-19 21:20:34,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 789 transitions, 1944 flow [2022-07-19 21:20:34,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 789 transitions, 1930 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:34,678 INFO L242 Difference]: Finished difference. Result has 848 places, 778 transitions, 1830 flow [2022-07-19 21:20:34,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1830, PETRI_PLACES=848, PETRI_TRANSITIONS=778} [2022-07-19 21:20:34,679 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 24 predicate places. [2022-07-19 21:20:34,679 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 778 transitions, 1830 flow [2022-07-19 21:20:34,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 738.6111111111111) internal successors, (13295), 18 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:34,680 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:34,680 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:34,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-07-19 21:20:34,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-07-19 21:20:34,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 442058667, now seen corresponding path program 1 times [2022-07-19 21:20:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871319150] [2022-07-19 21:20:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:35,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:35,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871319150] [2022-07-19 21:20:35,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871319150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:35,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167776233] [2022-07-19 21:20:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:35,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:35,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:35,092 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:35,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-19 21:20:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:35,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:35,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:35,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:36,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167776233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:36,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:36,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:36,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430984417] [2022-07-19 21:20:36,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:36,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:36,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:36,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-19 21:20:36,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 778 transitions, 1830 flow. Second operand has 34 states, 34 states have (on average 738.7941176470588) internal successors, (25119), 34 states have internal predecessors, (25119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:36,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:36,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-19 21:20:36,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:37,041 INFO L129 PetriNetUnfolder]: 0/1130 cut-off events. [2022-07-19 21:20:37,042 INFO L130 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-07-19 21:20:37,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 1130 events. 0/1130 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3441 event pairs, 0 based on Foata normal form. 8/1138 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-19 21:20:37,048 INFO L132 encePairwiseOnDemand]: 925/931 looper letters, 60 selfloop transitions, 45 changer transitions 0/829 dead transitions. [2022-07-19 21:20:37,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 829 transitions, 2356 flow [2022-07-19 21:20:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 33233 transitions. [2022-07-19 21:20:37,067 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932450173051677 [2022-07-19 21:20:37,067 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 33233 transitions. [2022-07-19 21:20:37,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 33233 transitions. [2022-07-19 21:20:37,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:37,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 33233 transitions. [2022-07-19 21:20:37,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 738.5111111111111) internal successors, (33233), 45 states have internal predecessors, (33233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:37,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 931.0) internal successors, (42826), 46 states have internal predecessors, (42826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:37,132 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 931.0) internal successors, (42826), 46 states have internal predecessors, (42826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:37,132 INFO L186 Difference]: Start difference. First operand has 848 places, 778 transitions, 1830 flow. Second operand 45 states and 33233 transitions. [2022-07-19 21:20:37,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 829 transitions, 2356 flow [2022-07-19 21:20:37,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 829 transitions, 2316 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:37,144 INFO L242 Difference]: Finished difference. Result has 895 places, 803 transitions, 2108 flow [2022-07-19 21:20:37,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2108, PETRI_PLACES=895, PETRI_TRANSITIONS=803} [2022-07-19 21:20:37,144 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 71 predicate places. [2022-07-19 21:20:37,145 INFO L495 AbstractCegarLoop]: Abstraction has has 895 places, 803 transitions, 2108 flow [2022-07-19 21:20:37,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 738.7941176470588) internal successors, (25119), 34 states have internal predecessors, (25119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:37,148 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:37,148 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:37,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:37,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:37,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash -65480249, now seen corresponding path program 1 times [2022-07-19 21:20:37,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:37,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222623864] [2022-07-19 21:20:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:37,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:37,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222623864] [2022-07-19 21:20:37,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222623864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306138716] [2022-07-19 21:20:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:37,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:37,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:37,661 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:37,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-19 21:20:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:38,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:38,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:39,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306138716] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:39,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:39,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:39,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849155236] [2022-07-19 21:20:39,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:39,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:39,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:39,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:39,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-19 21:20:39,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 803 transitions, 2108 flow. Second operand has 66 states, 66 states have (on average 738.8939393939394) internal successors, (48767), 66 states have internal predecessors, (48767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:39,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:39,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-19 21:20:39,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:40,378 INFO L129 PetriNetUnfolder]: 0/974 cut-off events. [2022-07-19 21:20:40,378 INFO L130 PetriNetUnfolder]: For 1619/1619 co-relation queries the response was YES. [2022-07-19 21:20:40,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 974 events. 0/974 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2443 event pairs, 0 based on Foata normal form. 12/986 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-19 21:20:40,380 INFO L132 encePairwiseOnDemand]: 926/931 looper letters, 81 selfloop transitions, 79 changer transitions 0/872 dead transitions. [2022-07-19 21:20:40,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 872 transitions, 3002 flow [2022-07-19 21:20:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-19 21:20:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-19 21:20:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 59788 transitions. [2022-07-19 21:20:40,404 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928286324276299 [2022-07-19 21:20:40,404 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 59788 transitions. [2022-07-19 21:20:40,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 59788 transitions. [2022-07-19 21:20:40,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:40,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 59788 transitions. [2022-07-19 21:20:40,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 738.1234567901234) internal successors, (59788), 81 states have internal predecessors, (59788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:40,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 931.0) internal successors, (76342), 82 states have internal predecessors, (76342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:40,495 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 931.0) internal successors, (76342), 82 states have internal predecessors, (76342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:40,496 INFO L186 Difference]: Start difference. First operand has 895 places, 803 transitions, 2108 flow. Second operand 81 states and 59788 transitions. [2022-07-19 21:20:40,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 872 transitions, 3002 flow [2022-07-19 21:20:40,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 872 transitions, 2785 flow, removed 21 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:40,534 INFO L242 Difference]: Finished difference. Result has 929 places, 823 transitions, 2351 flow [2022-07-19 21:20:40,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2351, PETRI_PLACES=929, PETRI_TRANSITIONS=823} [2022-07-19 21:20:40,535 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 105 predicate places. [2022-07-19 21:20:40,535 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 823 transitions, 2351 flow [2022-07-19 21:20:40,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 738.8939393939394) internal successors, (48767), 66 states have internal predecessors, (48767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:40,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:40,540 INFO L200 CegarLoopForPetriNet]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:40,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:40,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:40,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:40,741 INFO L85 PathProgramCache]: Analyzing trace with hash -150822230, now seen corresponding path program 1 times [2022-07-19 21:20:40,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:40,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131537453] [2022-07-19 21:20:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:40,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:40,779 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:40,845 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:40,845 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:40,846 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:40,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:40,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-07-19 21:20:40,846 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:20:40,850 WARN L231 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:40,850 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2022-07-19 21:20:40,900 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:40,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 853 places, 964 transitions, 2765 flow [2022-07-19 21:20:41,658 INFO L129 PetriNetUnfolder]: 274/2012 cut-off events. [2022-07-19 21:20:41,658 INFO L130 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-07-19 21:20:41,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 2012 events. 274/2012 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7658 event pairs, 0 based on Foata normal form. 0/1682 useless extension candidates. Maximal degree in co-relation 2342. Up to 56 conditions per place. [2022-07-19 21:20:41,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 853 places, 964 transitions, 2765 flow [2022-07-19 21:20:41,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 853 places, 964 transitions, 2765 flow [2022-07-19 21:20:41,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:41,830 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:20:41,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:41,834 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2022-07-19 21:20:41,834 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:41,835 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:41,835 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:41,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:41,835 INFO L85 PathProgramCache]: Analyzing trace with hash 188590246, now seen corresponding path program 1 times [2022-07-19 21:20:41,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:41,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300303314] [2022-07-19 21:20:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:41,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:41,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:41,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300303314] [2022-07-19 21:20:41,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300303314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:41,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:41,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:20:41,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39541438] [2022-07-19 21:20:41,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:41,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:20:41,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:41,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:20:41,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:20:41,855 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 770 out of 964 [2022-07-19 21:20:41,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 964 transitions, 2765 flow. Second operand has 2 states, 2 states have (on average 770.5) internal successors, (1541), 2 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:41,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:41,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 770 of 964 [2022-07-19 21:20:41,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:42,544 INFO L129 PetriNetUnfolder]: 0/1710 cut-off events. [2022-07-19 21:20:42,545 INFO L130 PetriNetUnfolder]: For 4005/4005 co-relation queries the response was YES. [2022-07-19 21:20:42,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2198 conditions, 1710 events. 0/1710 cut-off events. For 4005/4005 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7160 event pairs, 0 based on Foata normal form. 2226/3880 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-07-19 21:20:42,548 INFO L132 encePairwiseOnDemand]: 798/964 looper letters, 27 selfloop transitions, 0 changer transitions 12/797 dead transitions. [2022-07-19 21:20:42,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 797 transitions, 2485 flow [2022-07-19 21:20:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:20:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:20:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1733 transitions. [2022-07-19 21:20:42,550 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8988589211618258 [2022-07-19 21:20:42,550 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1733 transitions. [2022-07-19 21:20:42,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1733 transitions. [2022-07-19 21:20:42,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:42,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1733 transitions. [2022-07-19 21:20:42,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 866.5) internal successors, (1733), 2 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:42,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 964.0) internal successors, (2892), 3 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:42,553 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 964.0) internal successors, (2892), 3 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:42,553 INFO L186 Difference]: Start difference. First operand has 853 places, 964 transitions, 2765 flow. Second operand 2 states and 1733 transitions. [2022-07-19 21:20:42,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 797 transitions, 2485 flow [2022-07-19 21:20:42,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 797 transitions, 1783 flow, removed 351 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:42,565 INFO L242 Difference]: Finished difference. Result has 853 places, 785 transitions, 1705 flow [2022-07-19 21:20:42,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=852, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1705, PETRI_PLACES=853, PETRI_TRANSITIONS=785} [2022-07-19 21:20:42,566 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 0 predicate places. [2022-07-19 21:20:42,566 INFO L495 AbstractCegarLoop]: Abstraction has has 853 places, 785 transitions, 1705 flow [2022-07-19 21:20:42,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 770.5) internal successors, (1541), 2 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:42,567 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:42,567 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:42,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-07-19 21:20:42,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:42,567 INFO L85 PathProgramCache]: Analyzing trace with hash -104812761, now seen corresponding path program 1 times [2022-07-19 21:20:42,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:42,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751398668] [2022-07-19 21:20:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:42,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:42,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751398668] [2022-07-19 21:20:42,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751398668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:42,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:42,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:42,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8164043] [2022-07-19 21:20:42,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:42,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:42,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:42,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:42,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:42,588 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 763 out of 964 [2022-07-19 21:20:42,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 785 transitions, 1705 flow. Second operand has 3 states, 3 states have (on average 764.0) internal successors, (2292), 3 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:42,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:42,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 763 of 964 [2022-07-19 21:20:42,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:43,301 INFO L129 PetriNetUnfolder]: 0/1361 cut-off events. [2022-07-19 21:20:43,301 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-19 21:20:43,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 1361 events. 0/1361 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4796 event pairs, 0 based on Foata normal form. 0/1334 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2022-07-19 21:20:43,304 INFO L132 encePairwiseOnDemand]: 961/964 looper letters, 36 selfloop transitions, 2 changer transitions 0/789 dead transitions. [2022-07-19 21:20:43,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 789 transitions, 1789 flow [2022-07-19 21:20:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2328 transitions. [2022-07-19 21:20:43,306 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8049792531120332 [2022-07-19 21:20:43,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2328 transitions. [2022-07-19 21:20:43,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2328 transitions. [2022-07-19 21:20:43,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:43,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2328 transitions. [2022-07-19 21:20:43,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 776.0) internal successors, (2328), 3 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:43,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 964.0) internal successors, (3856), 4 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:43,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 964.0) internal successors, (3856), 4 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:43,309 INFO L186 Difference]: Start difference. First operand has 853 places, 785 transitions, 1705 flow. Second operand 3 states and 2328 transitions. [2022-07-19 21:20:43,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 789 transitions, 1789 flow [2022-07-19 21:20:43,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 789 transitions, 1789 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:43,317 INFO L242 Difference]: Finished difference. Result has 844 places, 786 transitions, 1717 flow [2022-07-19 21:20:43,318 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=841, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1717, PETRI_PLACES=844, PETRI_TRANSITIONS=786} [2022-07-19 21:20:43,318 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, -9 predicate places. [2022-07-19 21:20:43,318 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 786 transitions, 1717 flow [2022-07-19 21:20:43,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 764.0) internal successors, (2292), 3 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:43,319 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:43,319 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] [2022-07-19 21:20:43,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-07-19 21:20:43,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash -144204960, now seen corresponding path program 1 times [2022-07-19 21:20:43,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:43,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724761299] [2022-07-19 21:20:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:43,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:43,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:43,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724761299] [2022-07-19 21:20:43,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724761299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:43,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049881569] [2022-07-19 21:20:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:43,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:43,357 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:43,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-19 21:20:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:43,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:44,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:44,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049881569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:44,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:44,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:44,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489726691] [2022-07-19 21:20:44,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:44,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:44,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:44,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:44,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:44,027 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-19 21:20:44,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 786 transitions, 1717 flow. Second operand has 10 states, 10 states have (on average 764.3) internal successors, (7643), 10 states have internal predecessors, (7643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:44,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:44,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-19 21:20:44,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:44,730 INFO L129 PetriNetUnfolder]: 0/1335 cut-off events. [2022-07-19 21:20:44,730 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-19 21:20:44,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 1335 events. 0/1335 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4659 event pairs, 0 based on Foata normal form. 2/1337 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-07-19 21:20:44,733 INFO L132 encePairwiseOnDemand]: 958/964 looper letters, 37 selfloop transitions, 9 changer transitions 0/796 dead transitions. [2022-07-19 21:20:44,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 852 places, 796 transitions, 1831 flow [2022-07-19 21:20:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6906 transitions. [2022-07-19 21:20:44,737 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959889349930843 [2022-07-19 21:20:44,737 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6906 transitions. [2022-07-19 21:20:44,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6906 transitions. [2022-07-19 21:20:44,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:44,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6906 transitions. [2022-07-19 21:20:44,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 767.3333333333334) internal successors, (6906), 9 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:44,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 964.0) internal successors, (9640), 10 states have internal predecessors, (9640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:44,747 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 964.0) internal successors, (9640), 10 states have internal predecessors, (9640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:44,747 INFO L186 Difference]: Start difference. First operand has 844 places, 786 transitions, 1717 flow. Second operand 9 states and 6906 transitions. [2022-07-19 21:20:44,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 852 places, 796 transitions, 1831 flow [2022-07-19 21:20:44,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 796 transitions, 1829 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:44,756 INFO L242 Difference]: Finished difference. Result has 854 places, 792 transitions, 1765 flow [2022-07-19 21:20:44,757 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1765, PETRI_PLACES=854, PETRI_TRANSITIONS=792} [2022-07-19 21:20:44,757 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 1 predicate places. [2022-07-19 21:20:44,757 INFO L495 AbstractCegarLoop]: Abstraction has has 854 places, 792 transitions, 1765 flow [2022-07-19 21:20:44,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 764.3) internal successors, (7643), 10 states have internal predecessors, (7643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:44,758 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:44,758 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] [2022-07-19 21:20:44,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:44,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-07-19 21:20:44,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash -588279275, now seen corresponding path program 1 times [2022-07-19 21:20:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:44,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337830761] [2022-07-19 21:20:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:44,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:45,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:45,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337830761] [2022-07-19 21:20:45,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337830761] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:45,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062253378] [2022-07-19 21:20:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:45,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:45,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:45,013 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:45,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-19 21:20:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:45,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:45,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:45,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062253378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:45,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:45,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714896539] [2022-07-19 21:20:45,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:45,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:45,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:45,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:45,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-19 21:20:45,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 854 places, 792 transitions, 1765 flow. Second operand has 18 states, 18 states have (on average 764.6111111111111) internal successors, (13763), 18 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:45,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:45,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-19 21:20:45,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:46,643 INFO L129 PetriNetUnfolder]: 0/1283 cut-off events. [2022-07-19 21:20:46,644 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-19 21:20:46,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1838 conditions, 1283 events. 0/1283 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4299 event pairs, 0 based on Foata normal form. 4/1287 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-19 21:20:46,647 INFO L132 encePairwiseOnDemand]: 958/964 looper letters, 45 selfloop transitions, 21 changer transitions 0/816 dead transitions. [2022-07-19 21:20:46,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 816 transitions, 2005 flow [2022-07-19 21:20:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16072 transitions. [2022-07-19 21:20:46,654 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7939142461964038 [2022-07-19 21:20:46,655 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16072 transitions. [2022-07-19 21:20:46,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16072 transitions. [2022-07-19 21:20:46,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:46,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16072 transitions. [2022-07-19 21:20:46,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 765.3333333333334) internal successors, (16072), 21 states have internal predecessors, (16072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:46,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 964.0) internal successors, (21208), 22 states have internal predecessors, (21208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:46,679 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 964.0) internal successors, (21208), 22 states have internal predecessors, (21208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:46,680 INFO L186 Difference]: Start difference. First operand has 854 places, 792 transitions, 1765 flow. Second operand 21 states and 16072 transitions. [2022-07-19 21:20:46,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 816 transitions, 2005 flow [2022-07-19 21:20:46,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 816 transitions, 1991 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:46,690 INFO L242 Difference]: Finished difference. Result has 878 places, 805 transitions, 1889 flow [2022-07-19 21:20:46,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1889, PETRI_PLACES=878, PETRI_TRANSITIONS=805} [2022-07-19 21:20:46,691 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 25 predicate places. [2022-07-19 21:20:46,691 INFO L495 AbstractCegarLoop]: Abstraction has has 878 places, 805 transitions, 1889 flow [2022-07-19 21:20:46,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 764.6111111111111) internal successors, (13763), 18 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:46,693 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:46,693 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:46,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:46,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-07-19 21:20:46,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:46,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:46,912 INFO L85 PathProgramCache]: Analyzing trace with hash -216222325, now seen corresponding path program 1 times [2022-07-19 21:20:46,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:46,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836181538] [2022-07-19 21:20:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:46,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:47,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:47,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836181538] [2022-07-19 21:20:47,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836181538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:47,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781602340] [2022-07-19 21:20:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:47,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:47,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:47,051 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:47,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-19 21:20:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:47,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:47,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:48,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781602340] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:48,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:48,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:48,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431370699] [2022-07-19 21:20:48,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:48,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:48,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:48,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:48,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:48,031 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-19 21:20:48,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 878 places, 805 transitions, 1889 flow. Second operand has 34 states, 34 states have (on average 764.7941176470588) internal successors, (26003), 34 states have internal predecessors, (26003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:48,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:48,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-19 21:20:48,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:49,127 INFO L129 PetriNetUnfolder]: 0/1179 cut-off events. [2022-07-19 21:20:49,127 INFO L130 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2022-07-19 21:20:49,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 1179 events. 0/1179 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3625 event pairs, 0 based on Foata normal form. 8/1187 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-19 21:20:49,130 INFO L132 encePairwiseOnDemand]: 958/964 looper letters, 61 selfloop transitions, 45 changer transitions 0/856 dead transitions. [2022-07-19 21:20:49,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 922 places, 856 transitions, 2417 flow [2022-07-19 21:20:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:49,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 34404 transitions. [2022-07-19 21:20:49,144 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930843706777316 [2022-07-19 21:20:49,145 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 34404 transitions. [2022-07-19 21:20:49,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 34404 transitions. [2022-07-19 21:20:49,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:49,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 34404 transitions. [2022-07-19 21:20:49,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 764.5333333333333) internal successors, (34404), 45 states have internal predecessors, (34404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:49,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 964.0) internal successors, (44344), 46 states have internal predecessors, (44344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:49,199 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 964.0) internal successors, (44344), 46 states have internal predecessors, (44344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:49,200 INFO L186 Difference]: Start difference. First operand has 878 places, 805 transitions, 1889 flow. Second operand 45 states and 34404 transitions. [2022-07-19 21:20:49,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 922 places, 856 transitions, 2417 flow [2022-07-19 21:20:49,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 916 places, 856 transitions, 2377 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:49,212 INFO L242 Difference]: Finished difference. Result has 925 places, 830 transitions, 2167 flow [2022-07-19 21:20:49,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=872, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2167, PETRI_PLACES=925, PETRI_TRANSITIONS=830} [2022-07-19 21:20:49,213 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 72 predicate places. [2022-07-19 21:20:49,213 INFO L495 AbstractCegarLoop]: Abstraction has has 925 places, 830 transitions, 2167 flow [2022-07-19 21:20:49,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 764.7941176470588) internal successors, (26003), 34 states have internal predecessors, (26003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:49,215 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:49,215 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:49,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:49,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-07-19 21:20:49,429 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1474444455, now seen corresponding path program 1 times [2022-07-19 21:20:49,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:49,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281670746] [2022-07-19 21:20:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:49,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:49,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:49,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281670746] [2022-07-19 21:20:49,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281670746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:49,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698257627] [2022-07-19 21:20:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:49,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:49,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:49,706 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:49,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-07-19 21:20:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:50,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:50,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:50,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:51,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698257627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:51,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:51,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:51,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920675792] [2022-07-19 21:20:51,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:51,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:51,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:51,254 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-19 21:20:51,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 925 places, 830 transitions, 2167 flow. Second operand has 66 states, 66 states have (on average 764.8939393939394) internal successors, (50483), 66 states have internal predecessors, (50483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:51,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:51,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-19 21:20:51,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:52,524 INFO L129 PetriNetUnfolder]: 0/1010 cut-off events. [2022-07-19 21:20:52,525 INFO L130 PetriNetUnfolder]: For 1740/1740 co-relation queries the response was YES. [2022-07-19 21:20:52,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 1010 events. 0/1010 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2541 event pairs, 0 based on Foata normal form. 13/1023 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2022-07-19 21:20:52,526 INFO L132 encePairwiseOnDemand]: 959/964 looper letters, 84 selfloop transitions, 82 changer transitions 0/904 dead transitions. [2022-07-19 21:20:52,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 904 transitions, 3117 flow [2022-07-19 21:20:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-19 21:20:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-07-19 21:20:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 64187 transitions. [2022-07-19 21:20:52,551 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926669630507804 [2022-07-19 21:20:52,552 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 64187 transitions. [2022-07-19 21:20:52,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 64187 transitions. [2022-07-19 21:20:52,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:52,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 64187 transitions. [2022-07-19 21:20:52,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 764.1309523809524) internal successors, (64187), 84 states have internal predecessors, (64187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:52,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 964.0) internal successors, (81940), 85 states have internal predecessors, (81940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:52,651 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 964.0) internal successors, (81940), 85 states have internal predecessors, (81940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:52,652 INFO L186 Difference]: Start difference. First operand has 925 places, 830 transitions, 2167 flow. Second operand 84 states and 64187 transitions. [2022-07-19 21:20:52,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 904 transitions, 3117 flow [2022-07-19 21:20:52,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 962 places, 904 transitions, 2892 flow, removed 22 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:52,663 INFO L242 Difference]: Finished difference. Result has 962 places, 853 transitions, 2439 flow [2022-07-19 21:20:52,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=879, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=2439, PETRI_PLACES=962, PETRI_TRANSITIONS=853} [2022-07-19 21:20:52,664 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 109 predicate places. [2022-07-19 21:20:52,664 INFO L495 AbstractCegarLoop]: Abstraction has has 962 places, 853 transitions, 2439 flow [2022-07-19 21:20:52,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 764.8939393939394) internal successors, (50483), 66 states have internal predecessors, (50483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:52,669 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:52,669 INFO L200 CegarLoopForPetriNet]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:52,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:52,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-07-19 21:20:52,883 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:52,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:52,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1939564189, now seen corresponding path program 1 times [2022-07-19 21:20:52,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:52,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923415922] [2022-07-19 21:20:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:52,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:52,920 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:52,970 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:52,970 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:52,970 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:52,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:52,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-07-19 21:20:52,971 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:52,971 WARN L231 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:52,971 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2022-07-19 21:20:53,015 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:53,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 882 places, 997 transitions, 2890 flow [2022-07-19 21:20:53,797 INFO L129 PetriNetUnfolder]: 284/2084 cut-off events. [2022-07-19 21:20:53,798 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-19 21:20:53,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2575 conditions, 2084 events. 284/2084 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7877 event pairs, 0 based on Foata normal form. 0/1742 useless extension candidates. Maximal degree in co-relation 2444. Up to 58 conditions per place. [2022-07-19 21:20:53,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 882 places, 997 transitions, 2890 flow [2022-07-19 21:20:54,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 882 places, 997 transitions, 2890 flow [2022-07-19 21:20:54,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:54,067 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:20:54,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:54,072 INFO L129 PetriNetUnfolder]: 5/94 cut-off events. [2022-07-19 21:20:54,072 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:54,072 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:54,072 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:54,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1462249081, now seen corresponding path program 1 times [2022-07-19 21:20:54,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:54,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593146261] [2022-07-19 21:20:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:54,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:54,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:54,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593146261] [2022-07-19 21:20:54,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593146261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:54,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:54,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:54,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413682720] [2022-07-19 21:20:54,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:54,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:54,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:54,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:54,098 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 789 out of 997 [2022-07-19 21:20:54,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 882 places, 997 transitions, 2890 flow. Second operand has 3 states, 3 states have (on average 790.0) internal successors, (2370), 3 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:54,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:54,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 789 of 997 [2022-07-19 21:20:54,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:54,942 INFO L129 PetriNetUnfolder]: 0/1746 cut-off events. [2022-07-19 21:20:54,943 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-19 21:20:54,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2410 conditions, 1746 events. 0/1746 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7383 event pairs, 0 based on Foata normal form. 13604/15294 useless extension candidates. Maximal degree in co-relation 0. Up to 168 conditions per place. [2022-07-19 21:20:54,946 INFO L132 encePairwiseOnDemand]: 822/997 looper letters, 37 selfloop transitions, 2 changer transitions 12/828 dead transitions. [2022-07-19 21:20:54,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 828 transitions, 2630 flow [2022-07-19 21:20:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2586 transitions. [2022-07-19 21:20:54,948 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8645937813440321 [2022-07-19 21:20:54,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2586 transitions. [2022-07-19 21:20:54,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2586 transitions. [2022-07-19 21:20:54,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:54,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2586 transitions. [2022-07-19 21:20:54,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 862.0) internal successors, (2586), 3 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:54,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 997.0) internal successors, (3988), 4 states have internal predecessors, (3988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:54,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 997.0) internal successors, (3988), 4 states have internal predecessors, (3988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:54,952 INFO L186 Difference]: Start difference. First operand has 882 places, 997 transitions, 2890 flow. Second operand 3 states and 2586 transitions. [2022-07-19 21:20:54,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 828 transitions, 2630 flow [2022-07-19 21:20:54,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 883 places, 828 transitions, 1874 flow, removed 378 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:54,963 INFO L242 Difference]: Finished difference. Result has 884 places, 813 transitions, 1776 flow [2022-07-19 21:20:54,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1776, PETRI_PLACES=884, PETRI_TRANSITIONS=813} [2022-07-19 21:20:54,963 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 2 predicate places. [2022-07-19 21:20:54,963 INFO L495 AbstractCegarLoop]: Abstraction has has 884 places, 813 transitions, 1776 flow [2022-07-19 21:20:54,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 790.0) internal successors, (2370), 3 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:54,964 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:54,964 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] [2022-07-19 21:20:54,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-07-19 21:20:54,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1229546752, now seen corresponding path program 1 times [2022-07-19 21:20:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:54,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739311147] [2022-07-19 21:20:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:54,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:54,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739311147] [2022-07-19 21:20:54,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739311147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000710652] [2022-07-19 21:20:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:54,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:54,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:54,992 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:54,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-07-19 21:20:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:55,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:55,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:55,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:55,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000710652] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:55,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:55,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:55,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067824447] [2022-07-19 21:20:55,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:55,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:55,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:55,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:55,703 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-19 21:20:55,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 884 places, 813 transitions, 1776 flow. Second operand has 10 states, 10 states have (on average 790.3) internal successors, (7903), 10 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:55,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:55,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-19 21:20:55,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:56,437 INFO L129 PetriNetUnfolder]: 0/1384 cut-off events. [2022-07-19 21:20:56,437 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:20:56,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 1384 events. 0/1384 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4834 event pairs, 0 based on Foata normal form. 2/1386 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-07-19 21:20:56,440 INFO L132 encePairwiseOnDemand]: 991/997 looper letters, 38 selfloop transitions, 9 changer transitions 0/823 dead transitions. [2022-07-19 21:20:56,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 823 transitions, 1892 flow [2022-07-19 21:20:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7141 transitions. [2022-07-19 21:20:56,444 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7958319402652402 [2022-07-19 21:20:56,445 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7141 transitions. [2022-07-19 21:20:56,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7141 transitions. [2022-07-19 21:20:56,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:56,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7141 transitions. [2022-07-19 21:20:56,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 793.4444444444445) internal successors, (7141), 9 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:56,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 997.0) internal successors, (9970), 10 states have internal predecessors, (9970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:56,456 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 997.0) internal successors, (9970), 10 states have internal predecessors, (9970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:56,457 INFO L186 Difference]: Start difference. First operand has 884 places, 813 transitions, 1776 flow. Second operand 9 states and 7141 transitions. [2022-07-19 21:20:56,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 823 transitions, 1892 flow [2022-07-19 21:20:56,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 879 places, 823 transitions, 1890 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:56,467 INFO L242 Difference]: Finished difference. Result has 882 places, 819 transitions, 1824 flow [2022-07-19 21:20:56,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=871, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1824, PETRI_PLACES=882, PETRI_TRANSITIONS=819} [2022-07-19 21:20:56,467 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 0 predicate places. [2022-07-19 21:20:56,468 INFO L495 AbstractCegarLoop]: Abstraction has has 882 places, 819 transitions, 1824 flow [2022-07-19 21:20:56,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 790.3) internal successors, (7903), 10 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:56,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:56,468 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] [2022-07-19 21:20:56,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:56,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:56,678 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash 567306805, now seen corresponding path program 1 times [2022-07-19 21:20:56,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:56,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263663415] [2022-07-19 21:20:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:56,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:56,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:56,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263663415] [2022-07-19 21:20:56,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263663415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:56,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494539265] [2022-07-19 21:20:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:56,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:56,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:56,722 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:56,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-07-19 21:20:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:57,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:57,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:57,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494539265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:57,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:57,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:57,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460438390] [2022-07-19 21:20:57,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:57,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:57,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:57,530 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-19 21:20:57,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 882 places, 819 transitions, 1824 flow. Second operand has 18 states, 18 states have (on average 790.6111111111111) internal successors, (14231), 18 states have internal predecessors, (14231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:57,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:57,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-19 21:20:57,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:58,363 INFO L129 PetriNetUnfolder]: 0/1332 cut-off events. [2022-07-19 21:20:58,364 INFO L130 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-07-19 21:20:58,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 1332 events. 0/1332 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4493 event pairs, 0 based on Foata normal form. 4/1336 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-19 21:20:58,366 INFO L132 encePairwiseOnDemand]: 991/997 looper letters, 46 selfloop transitions, 21 changer transitions 0/843 dead transitions. [2022-07-19 21:20:58,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 902 places, 843 transitions, 2066 flow [2022-07-19 21:20:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16619 transitions. [2022-07-19 21:20:58,374 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7937622390982472 [2022-07-19 21:20:58,374 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16619 transitions. [2022-07-19 21:20:58,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16619 transitions. [2022-07-19 21:20:58,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:58,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16619 transitions. [2022-07-19 21:20:58,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 791.3809523809524) internal successors, (16619), 21 states have internal predecessors, (16619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:58,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 997.0) internal successors, (21934), 22 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:58,397 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 997.0) internal successors, (21934), 22 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:58,397 INFO L186 Difference]: Start difference. First operand has 882 places, 819 transitions, 1824 flow. Second operand 21 states and 16619 transitions. [2022-07-19 21:20:58,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 902 places, 843 transitions, 2066 flow [2022-07-19 21:20:58,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 901 places, 843 transitions, 2052 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:58,407 INFO L242 Difference]: Finished difference. Result has 906 places, 832 transitions, 1948 flow [2022-07-19 21:20:58,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1948, PETRI_PLACES=906, PETRI_TRANSITIONS=832} [2022-07-19 21:20:58,412 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 24 predicate places. [2022-07-19 21:20:58,412 INFO L495 AbstractCegarLoop]: Abstraction has has 906 places, 832 transitions, 1948 flow [2022-07-19 21:20:58,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 790.6111111111111) internal successors, (14231), 18 states have internal predecessors, (14231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:58,414 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:58,414 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:58,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:58,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:58,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash 970123947, now seen corresponding path program 1 times [2022-07-19 21:20:58,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:58,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11377756] [2022-07-19 21:20:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:58,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:58,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:58,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11377756] [2022-07-19 21:20:58,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11377756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:58,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169116337] [2022-07-19 21:20:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:58,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:58,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:58,703 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:58,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-07-19 21:20:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:59,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:59,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:59,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169116337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:59,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:59,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:59,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825462679] [2022-07-19 21:20:59,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:59,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:59,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:59,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:59,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:59,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-19 21:20:59,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 906 places, 832 transitions, 1948 flow. Second operand has 34 states, 34 states have (on average 790.7941176470588) internal successors, (26887), 34 states have internal predecessors, (26887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:59,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:59,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-19 21:20:59,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:00,427 INFO L129 PetriNetUnfolder]: 0/1228 cut-off events. [2022-07-19 21:21:00,428 INFO L130 PetriNetUnfolder]: For 627/627 co-relation queries the response was YES. [2022-07-19 21:21:00,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 1228 events. 0/1228 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3805 event pairs, 0 based on Foata normal form. 8/1236 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-19 21:21:00,430 INFO L132 encePairwiseOnDemand]: 991/997 looper letters, 62 selfloop transitions, 45 changer transitions 0/883 dead transitions. [2022-07-19 21:21:00,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 950 places, 883 transitions, 2478 flow [2022-07-19 21:21:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:21:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:21:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 35575 transitions. [2022-07-19 21:21:00,446 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7929343586314499 [2022-07-19 21:21:00,446 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 35575 transitions. [2022-07-19 21:21:00,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 35575 transitions. [2022-07-19 21:21:00,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:00,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 35575 transitions. [2022-07-19 21:21:00,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 790.5555555555555) internal successors, (35575), 45 states have internal predecessors, (35575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:00,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 997.0) internal successors, (45862), 46 states have internal predecessors, (45862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:00,496 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 997.0) internal successors, (45862), 46 states have internal predecessors, (45862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:00,497 INFO L186 Difference]: Start difference. First operand has 906 places, 832 transitions, 1948 flow. Second operand 45 states and 35575 transitions. [2022-07-19 21:21:00,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 950 places, 883 transitions, 2478 flow [2022-07-19 21:21:00,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 944 places, 883 transitions, 2438 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:00,508 INFO L242 Difference]: Finished difference. Result has 953 places, 857 transitions, 2226 flow [2022-07-19 21:21:00,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2226, PETRI_PLACES=953, PETRI_TRANSITIONS=857} [2022-07-19 21:21:00,509 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 71 predicate places. [2022-07-19 21:21:00,509 INFO L495 AbstractCegarLoop]: Abstraction has has 953 places, 857 transitions, 2226 flow [2022-07-19 21:21:00,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 790.7941176470588) internal successors, (26887), 34 states have internal predecessors, (26887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:00,511 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:00,511 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:00,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:00,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:00,731 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:00,731 INFO L85 PathProgramCache]: Analyzing trace with hash 991964103, now seen corresponding path program 1 times [2022-07-19 21:21:00,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:00,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176481559] [2022-07-19 21:21:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:00,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:00,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:00,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176481559] [2022-07-19 21:21:00,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176481559] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:00,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997634198] [2022-07-19 21:21:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:00,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:00,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:00,922 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:00,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-07-19 21:21:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:01,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:21:01,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:01,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:02,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997634198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:02,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:02,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:21:02,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111204687] [2022-07-19 21:21:02,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:02,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:21:02,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:02,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:21:02,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:21:02,488 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-19 21:21:02,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 953 places, 857 transitions, 2226 flow. Second operand has 66 states, 66 states have (on average 790.8939393939394) internal successors, (52199), 66 states have internal predecessors, (52199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:02,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:02,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-19 21:21:02,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:03,766 INFO L129 PetriNetUnfolder]: 0/1046 cut-off events. [2022-07-19 21:21:03,767 INFO L130 PetriNetUnfolder]: For 1861/1861 co-relation queries the response was YES. [2022-07-19 21:21:03,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1788 conditions, 1046 events. 0/1046 cut-off events. For 1861/1861 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2639 event pairs, 0 based on Foata normal form. 14/1060 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2022-07-19 21:21:03,769 INFO L132 encePairwiseOnDemand]: 992/997 looper letters, 87 selfloop transitions, 85 changer transitions 0/936 dead transitions. [2022-07-19 21:21:03,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1026 places, 936 transitions, 3232 flow [2022-07-19 21:21:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-19 21:21:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-19 21:21:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 68742 transitions. [2022-07-19 21:21:03,798 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925154774668834 [2022-07-19 21:21:03,798 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 68742 transitions. [2022-07-19 21:21:03,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 68742 transitions. [2022-07-19 21:21:03,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:03,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 68742 transitions. [2022-07-19 21:21:03,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 790.1379310344828) internal successors, (68742), 87 states have internal predecessors, (68742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:03,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 997.0) internal successors, (87736), 88 states have internal predecessors, (87736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:03,906 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 997.0) internal successors, (87736), 88 states have internal predecessors, (87736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:03,906 INFO L186 Difference]: Start difference. First operand has 953 places, 857 transitions, 2226 flow. Second operand 87 states and 68742 transitions. [2022-07-19 21:21:03,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1026 places, 936 transitions, 3232 flow [2022-07-19 21:21:03,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 936 transitions, 2999 flow, removed 23 selfloop flow, removed 33 redundant places. [2022-07-19 21:21:03,918 INFO L242 Difference]: Finished difference. Result has 993 places, 883 transitions, 2527 flow [2022-07-19 21:21:03,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=907, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=2527, PETRI_PLACES=993, PETRI_TRANSITIONS=883} [2022-07-19 21:21:03,919 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 111 predicate places. [2022-07-19 21:21:03,919 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 883 transitions, 2527 flow [2022-07-19 21:21:03,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 790.8939393939394) internal successors, (52199), 66 states have internal predecessors, (52199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:03,924 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:03,924 INFO L200 CegarLoopForPetriNet]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:03,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:04,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:04,145 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1128405327, now seen corresponding path program 1 times [2022-07-19 21:21:04,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:04,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25956185] [2022-07-19 21:21:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:04,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:04,180 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:21:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:04,231 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:21:04,231 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:21:04,231 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:21:04,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:21:04,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-07-19 21:21:04,232 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:21:04,232 WARN L231 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:21:04,232 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2022-07-19 21:21:04,277 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:21:04,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 911 places, 1030 transitions, 3017 flow [2022-07-19 21:21:05,052 INFO L129 PetriNetUnfolder]: 294/2156 cut-off events. [2022-07-19 21:21:05,052 INFO L130 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2022-07-19 21:21:05,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 2156 events. 294/2156 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8137 event pairs, 0 based on Foata normal form. 0/1802 useless extension candidates. Maximal degree in co-relation 2547. Up to 60 conditions per place. [2022-07-19 21:21:05,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 911 places, 1030 transitions, 3017 flow [2022-07-19 21:21:05,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 911 places, 1030 transitions, 3017 flow [2022-07-19 21:21:05,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:21:05,343 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:21:05,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:21:05,347 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-19 21:21:05,347 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:21:05,347 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:05,347 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:05,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash -787745722, now seen corresponding path program 1 times [2022-07-19 21:21:05,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:05,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714017679] [2022-07-19 21:21:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:05,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:05,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:05,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714017679] [2022-07-19 21:21:05,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714017679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:05,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:05,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:21:05,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256416830] [2022-07-19 21:21:05,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:05,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:21:05,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:21:05,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:21:05,383 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 822 out of 1030 [2022-07-19 21:21:05,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 1030 transitions, 3017 flow. Second operand has 2 states, 2 states have (on average 822.5) internal successors, (1645), 2 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:05,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:05,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 822 of 1030 [2022-07-19 21:21:05,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:06,139 INFO L129 PetriNetUnfolder]: 0/1832 cut-off events. [2022-07-19 21:21:06,139 INFO L130 PetriNetUnfolder]: For 4901/4901 co-relation queries the response was YES. [2022-07-19 21:21:06,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2385 conditions, 1832 events. 0/1832 cut-off events. For 4901/4901 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7846 event pairs, 0 based on Foata normal form. 2564/4336 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-19 21:21:06,142 INFO L132 encePairwiseOnDemand]: 852/1030 looper letters, 29 selfloop transitions, 0 changer transitions 12/851 dead transitions. [2022-07-19 21:21:06,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 851 transitions, 2717 flow [2022-07-19 21:21:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:21:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:21:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1851 transitions. [2022-07-19 21:21:06,144 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8985436893203883 [2022-07-19 21:21:06,144 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1851 transitions. [2022-07-19 21:21:06,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1851 transitions. [2022-07-19 21:21:06,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:06,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1851 transitions. [2022-07-19 21:21:06,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 925.5) internal successors, (1851), 2 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:06,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1030.0) internal successors, (3090), 3 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:06,147 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1030.0) internal successors, (3090), 3 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:06,147 INFO L186 Difference]: Start difference. First operand has 911 places, 1030 transitions, 3017 flow. Second operand 2 states and 1851 transitions. [2022-07-19 21:21:06,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 851 transitions, 2717 flow [2022-07-19 21:21:06,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 911 places, 851 transitions, 1905 flow, removed 406 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:06,159 INFO L242 Difference]: Finished difference. Result has 911 places, 839 transitions, 1823 flow [2022-07-19 21:21:06,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=910, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=851, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1823, PETRI_PLACES=911, PETRI_TRANSITIONS=839} [2022-07-19 21:21:06,160 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 0 predicate places. [2022-07-19 21:21:06,160 INFO L495 AbstractCegarLoop]: Abstraction has has 911 places, 839 transitions, 1823 flow [2022-07-19 21:21:06,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 822.5) internal successors, (1645), 2 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:06,160 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:06,160 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:06,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-07-19 21:21:06,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:06,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1081148729, now seen corresponding path program 1 times [2022-07-19 21:21:06,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:06,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065314345] [2022-07-19 21:21:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:06,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:06,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:06,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065314345] [2022-07-19 21:21:06,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065314345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:06,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:06,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:21:06,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469622771] [2022-07-19 21:21:06,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:06,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:21:06,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:21:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:21:06,201 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 815 out of 1030 [2022-07-19 21:21:06,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 839 transitions, 1823 flow. Second operand has 3 states, 3 states have (on average 816.0) internal successors, (2448), 3 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:06,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:06,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 815 of 1030 [2022-07-19 21:21:06,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:06,872 INFO L129 PetriNetUnfolder]: 0/1459 cut-off events. [2022-07-19 21:21:06,872 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-19 21:21:06,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 1459 events. 0/1459 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5171 event pairs, 0 based on Foata normal form. 0/1430 useless extension candidates. Maximal degree in co-relation 0. Up to 174 conditions per place. [2022-07-19 21:21:06,875 INFO L132 encePairwiseOnDemand]: 1027/1030 looper letters, 38 selfloop transitions, 2 changer transitions 0/843 dead transitions. [2022-07-19 21:21:06,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 901 places, 843 transitions, 1911 flow [2022-07-19 21:21:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:21:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:21:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2486 transitions. [2022-07-19 21:21:06,877 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8045307443365696 [2022-07-19 21:21:06,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2486 transitions. [2022-07-19 21:21:06,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2486 transitions. [2022-07-19 21:21:06,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:06,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2486 transitions. [2022-07-19 21:21:06,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 828.6666666666666) internal successors, (2486), 3 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:06,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1030.0) internal successors, (4120), 4 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:06,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1030.0) internal successors, (4120), 4 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:06,881 INFO L186 Difference]: Start difference. First operand has 911 places, 839 transitions, 1823 flow. Second operand 3 states and 2486 transitions. [2022-07-19 21:21:06,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 901 places, 843 transitions, 1911 flow [2022-07-19 21:21:06,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 901 places, 843 transitions, 1911 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:06,889 INFO L242 Difference]: Finished difference. Result has 902 places, 840 transitions, 1835 flow [2022-07-19 21:21:06,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=899, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1835, PETRI_PLACES=902, PETRI_TRANSITIONS=840} [2022-07-19 21:21:06,890 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, -9 predicate places. [2022-07-19 21:21:06,890 INFO L495 AbstractCegarLoop]: Abstraction has has 902 places, 840 transitions, 1835 flow [2022-07-19 21:21:06,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 816.0) internal successors, (2448), 3 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:06,890 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:06,890 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] [2022-07-19 21:21:06,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-07-19 21:21:06,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:06,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1578816032, now seen corresponding path program 1 times [2022-07-19 21:21:06,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:06,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989523690] [2022-07-19 21:21:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:06,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:06,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:06,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989523690] [2022-07-19 21:21:06,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989523690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:06,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014190294] [2022-07-19 21:21:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:06,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:06,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:06,932 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:06,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-07-19 21:21:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:07,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:21:07,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:07,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:07,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014190294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:07,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:07,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:21:07,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458026636] [2022-07-19 21:21:07,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:07,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:21:07,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:21:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:21:07,751 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-19 21:21:07,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 902 places, 840 transitions, 1835 flow. Second operand has 10 states, 10 states have (on average 816.3) internal successors, (8163), 10 states have internal predecessors, (8163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:07,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:07,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-19 21:21:07,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:08,524 INFO L129 PetriNetUnfolder]: 0/1433 cut-off events. [2022-07-19 21:21:08,524 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-19 21:21:08,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 1433 events. 0/1433 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5016 event pairs, 0 based on Foata normal form. 2/1435 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-07-19 21:21:08,527 INFO L132 encePairwiseOnDemand]: 1024/1030 looper letters, 39 selfloop transitions, 9 changer transitions 0/850 dead transitions. [2022-07-19 21:21:08,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 850 transitions, 1953 flow [2022-07-19 21:21:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:08,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7376 transitions. [2022-07-19 21:21:08,531 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956850053937432 [2022-07-19 21:21:08,531 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7376 transitions. [2022-07-19 21:21:08,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7376 transitions. [2022-07-19 21:21:08,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:08,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7376 transitions. [2022-07-19 21:21:08,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 819.5555555555555) internal successors, (7376), 9 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:08,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1030.0) internal successors, (10300), 10 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:08,541 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1030.0) internal successors, (10300), 10 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:08,541 INFO L186 Difference]: Start difference. First operand has 902 places, 840 transitions, 1835 flow. Second operand 9 states and 7376 transitions. [2022-07-19 21:21:08,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 910 places, 850 transitions, 1953 flow [2022-07-19 21:21:08,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 909 places, 850 transitions, 1951 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:08,550 INFO L242 Difference]: Finished difference. Result has 912 places, 846 transitions, 1883 flow [2022-07-19 21:21:08,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=901, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1883, PETRI_PLACES=912, PETRI_TRANSITIONS=846} [2022-07-19 21:21:08,551 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 1 predicate places. [2022-07-19 21:21:08,551 INFO L495 AbstractCegarLoop]: Abstraction has has 912 places, 846 transitions, 1883 flow [2022-07-19 21:21:08,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 816.3) internal successors, (8163), 10 states have internal predecessors, (8163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:08,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:08,552 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] [2022-07-19 21:21:08,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:08,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:08,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash -409704683, now seen corresponding path program 1 times [2022-07-19 21:21:08,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:08,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975762277] [2022-07-19 21:21:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:08,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:08,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975762277] [2022-07-19 21:21:08,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975762277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581429675] [2022-07-19 21:21:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:08,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:08,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:08,823 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:08,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-07-19 21:21:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:09,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:21:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:09,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:09,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581429675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:09,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:09,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:21:09,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139520867] [2022-07-19 21:21:09,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:09,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:21:09,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:09,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:21:09,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:09,830 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-19 21:21:09,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 912 places, 846 transitions, 1883 flow. Second operand has 18 states, 18 states have (on average 816.6111111111111) internal successors, (14699), 18 states have internal predecessors, (14699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:09,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:09,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-19 21:21:09,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:10,934 INFO L129 PetriNetUnfolder]: 0/1381 cut-off events. [2022-07-19 21:21:10,934 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-19 21:21:10,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1381 events. 0/1381 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4668 event pairs, 0 based on Foata normal form. 4/1385 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-07-19 21:21:10,938 INFO L132 encePairwiseOnDemand]: 1024/1030 looper letters, 47 selfloop transitions, 21 changer transitions 0/870 dead transitions. [2022-07-19 21:21:10,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 932 places, 870 transitions, 2127 flow [2022-07-19 21:21:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:21:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:21:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17166 transitions. [2022-07-19 21:21:10,949 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.793619972260749 [2022-07-19 21:21:10,949 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17166 transitions. [2022-07-19 21:21:10,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17166 transitions. [2022-07-19 21:21:10,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:10,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17166 transitions. [2022-07-19 21:21:10,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 817.4285714285714) internal successors, (17166), 21 states have internal predecessors, (17166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:10,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1030.0) internal successors, (22660), 22 states have internal predecessors, (22660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:10,978 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1030.0) internal successors, (22660), 22 states have internal predecessors, (22660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:10,979 INFO L186 Difference]: Start difference. First operand has 912 places, 846 transitions, 1883 flow. Second operand 21 states and 17166 transitions. [2022-07-19 21:21:10,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 932 places, 870 transitions, 2127 flow [2022-07-19 21:21:10,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 931 places, 870 transitions, 2113 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:10,992 INFO L242 Difference]: Finished difference. Result has 936 places, 859 transitions, 2007 flow [2022-07-19 21:21:10,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1877, PETRI_DIFFERENCE_MINUEND_PLACES=911, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2007, PETRI_PLACES=936, PETRI_TRANSITIONS=859} [2022-07-19 21:21:10,993 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 25 predicate places. [2022-07-19 21:21:10,993 INFO L495 AbstractCegarLoop]: Abstraction has has 936 places, 859 transitions, 2007 flow [2022-07-19 21:21:10,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 816.6111111111111) internal successors, (14699), 18 states have internal predecessors, (14699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:10,995 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:10,995 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:11,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:11,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-07-19 21:21:11,203 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:11,204 INFO L85 PathProgramCache]: Analyzing trace with hash -293869813, now seen corresponding path program 1 times [2022-07-19 21:21:11,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:11,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143176311] [2022-07-19 21:21:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:11,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:11,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:11,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143176311] [2022-07-19 21:21:11,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143176311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:11,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809112959] [2022-07-19 21:21:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:11,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:11,310 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:11,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-07-19 21:21:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:12,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:21:12,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:12,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:12,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809112959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:12,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:12,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:21:12,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767834886] [2022-07-19 21:21:12,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:12,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:21:12,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:21:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:21:12,375 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-19 21:21:12,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 936 places, 859 transitions, 2007 flow. Second operand has 34 states, 34 states have (on average 816.7941176470588) internal successors, (27771), 34 states have internal predecessors, (27771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:12,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:12,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-19 21:21:12,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:13,482 INFO L129 PetriNetUnfolder]: 0/1277 cut-off events. [2022-07-19 21:21:13,482 INFO L130 PetriNetUnfolder]: For 654/654 co-relation queries the response was YES. [2022-07-19 21:21:13,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 1277 events. 0/1277 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3991 event pairs, 0 based on Foata normal form. 8/1285 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-19 21:21:13,485 INFO L132 encePairwiseOnDemand]: 1024/1030 looper letters, 63 selfloop transitions, 45 changer transitions 0/910 dead transitions. [2022-07-19 21:21:13,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 980 places, 910 transitions, 2539 flow [2022-07-19 21:21:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:21:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:21:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 36746 transitions. [2022-07-19 21:21:13,501 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927939590075512 [2022-07-19 21:21:13,501 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 36746 transitions. [2022-07-19 21:21:13,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 36746 transitions. [2022-07-19 21:21:13,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:13,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 36746 transitions. [2022-07-19 21:21:13,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 816.5777777777778) internal successors, (36746), 45 states have internal predecessors, (36746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:13,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1030.0) internal successors, (47380), 46 states have internal predecessors, (47380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:13,561 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1030.0) internal successors, (47380), 46 states have internal predecessors, (47380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:13,562 INFO L186 Difference]: Start difference. First operand has 936 places, 859 transitions, 2007 flow. Second operand 45 states and 36746 transitions. [2022-07-19 21:21:13,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 980 places, 910 transitions, 2539 flow [2022-07-19 21:21:13,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 974 places, 910 transitions, 2499 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:13,574 INFO L242 Difference]: Finished difference. Result has 983 places, 884 transitions, 2285 flow [2022-07-19 21:21:13,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1983, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2285, PETRI_PLACES=983, PETRI_TRANSITIONS=884} [2022-07-19 21:21:13,575 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 72 predicate places. [2022-07-19 21:21:13,575 INFO L495 AbstractCegarLoop]: Abstraction has has 983 places, 884 transitions, 2285 flow [2022-07-19 21:21:13,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 816.7941176470588) internal successors, (27771), 34 states have internal predecessors, (27771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:13,578 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:13,578 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:13,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:13,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-07-19 21:21:13,791 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1512921305, now seen corresponding path program 1 times [2022-07-19 21:21:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:13,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648578212] [2022-07-19 21:21:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:13,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:14,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:14,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648578212] [2022-07-19 21:21:14,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648578212] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:14,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194904968] [2022-07-19 21:21:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:14,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:14,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:14,033 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:14,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-07-19 21:21:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:14,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:21:14,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:14,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:15,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194904968] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:15,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:15,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:21:15,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129251874] [2022-07-19 21:21:15,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:15,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:21:15,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:15,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:21:15,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:21:15,645 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-19 21:21:15,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 983 places, 884 transitions, 2285 flow. Second operand has 66 states, 66 states have (on average 816.8939393939394) internal successors, (53915), 66 states have internal predecessors, (53915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:15,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:15,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-19 21:21:15,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:17,700 INFO L129 PetriNetUnfolder]: 0/1082 cut-off events. [2022-07-19 21:21:17,700 INFO L130 PetriNetUnfolder]: For 1982/1982 co-relation queries the response was YES. [2022-07-19 21:21:17,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 1082 events. 0/1082 cut-off events. For 1982/1982 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2737 event pairs, 0 based on Foata normal form. 15/1097 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-19 21:21:17,701 INFO L132 encePairwiseOnDemand]: 1025/1030 looper letters, 90 selfloop transitions, 88 changer transitions 0/968 dead transitions. [2022-07-19 21:21:17,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 968 transitions, 3347 flow [2022-07-19 21:21:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-19 21:21:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-07-19 21:21:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 73453 transitions. [2022-07-19 21:21:17,733 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923732470334413 [2022-07-19 21:21:17,733 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 73453 transitions. [2022-07-19 21:21:17,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 73453 transitions. [2022-07-19 21:21:17,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:17,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 73453 transitions. [2022-07-19 21:21:17,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 816.1444444444444) internal successors, (73453), 90 states have internal predecessors, (73453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:17,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 1030.0) internal successors, (93730), 91 states have internal predecessors, (93730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:17,848 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 1030.0) internal successors, (93730), 91 states have internal predecessors, (93730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:17,848 INFO L186 Difference]: Start difference. First operand has 983 places, 884 transitions, 2285 flow. Second operand 90 states and 73453 transitions. [2022-07-19 21:21:17,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 968 transitions, 3347 flow [2022-07-19 21:21:17,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1026 places, 968 transitions, 3106 flow, removed 24 selfloop flow, removed 33 redundant places. [2022-07-19 21:21:17,860 INFO L242 Difference]: Finished difference. Result has 1026 places, 913 transitions, 2615 flow [2022-07-19 21:21:17,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=937, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=2615, PETRI_PLACES=1026, PETRI_TRANSITIONS=913} [2022-07-19 21:21:17,860 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 115 predicate places. [2022-07-19 21:21:17,861 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 913 transitions, 2615 flow [2022-07-19 21:21:17,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 816.8939393939394) internal successors, (53915), 66 states have internal predecessors, (53915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:17,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:17,866 INFO L200 CegarLoopForPetriNet]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:17,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:18,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-07-19 21:21:18,079 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1873476730, now seen corresponding path program 1 times [2022-07-19 21:21:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:18,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140418902] [2022-07-19 21:21:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:18,117 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:21:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:18,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:21:18,176 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:21:18,176 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:21:18,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:21:18,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-07-19 21:21:18,176 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:18,176 WARN L231 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:21:18,177 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2022-07-19 21:21:18,225 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:21:18,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 940 places, 1063 transitions, 3146 flow [2022-07-19 21:21:19,077 INFO L129 PetriNetUnfolder]: 304/2228 cut-off events. [2022-07-19 21:21:19,078 INFO L130 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2022-07-19 21:21:19,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2784 conditions, 2228 events. 304/2228 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8444 event pairs, 0 based on Foata normal form. 0/1862 useless extension candidates. Maximal degree in co-relation 2651. Up to 62 conditions per place. [2022-07-19 21:21:19,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 940 places, 1063 transitions, 3146 flow [2022-07-19 21:21:19,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 940 places, 1063 transitions, 3146 flow [2022-07-19 21:21:19,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:21:19,341 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:21:19,341 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:21:19,345 INFO L129 PetriNetUnfolder]: 5/94 cut-off events. [2022-07-19 21:21:19,345 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:21:19,345 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:19,345 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:19,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1331891302, now seen corresponding path program 1 times [2022-07-19 21:21:19,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:19,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629158327] [2022-07-19 21:21:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:19,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:19,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:19,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629158327] [2022-07-19 21:21:19,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629158327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:19,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:19,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:21:19,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240391049] [2022-07-19 21:21:19,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:19,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:21:19,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:19,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:21:19,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:21:19,365 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 848 out of 1063 [2022-07-19 21:21:19,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 940 places, 1063 transitions, 3146 flow. Second operand has 2 states, 2 states have (on average 848.5) internal successors, (1697), 2 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:19,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:19,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 848 of 1063 [2022-07-19 21:21:19,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:20,160 INFO L129 PetriNetUnfolder]: 0/1893 cut-off events. [2022-07-19 21:21:20,161 INFO L130 PetriNetUnfolder]: For 5395/5395 co-relation queries the response was YES. [2022-07-19 21:21:20,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 1893 events. 0/1893 cut-off events. For 5395/5395 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8050 event pairs, 0 based on Foata normal form. 2742/4573 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-19 21:21:20,164 INFO L132 encePairwiseOnDemand]: 879/1063 looper letters, 30 selfloop transitions, 0 changer transitions 12/878 dead transitions. [2022-07-19 21:21:20,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 940 places, 878 transitions, 2836 flow [2022-07-19 21:21:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:21:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:21:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1910 transitions. [2022-07-19 21:21:20,166 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8984007525870179 [2022-07-19 21:21:20,166 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1910 transitions. [2022-07-19 21:21:20,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1910 transitions. [2022-07-19 21:21:20,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:20,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1910 transitions. [2022-07-19 21:21:20,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 955.0) internal successors, (1910), 2 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:20,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1063.0) internal successors, (3189), 3 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:20,169 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1063.0) internal successors, (3189), 3 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:20,169 INFO L186 Difference]: Start difference. First operand has 940 places, 1063 transitions, 3146 flow. Second operand 2 states and 1910 transitions. [2022-07-19 21:21:20,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 940 places, 878 transitions, 2836 flow [2022-07-19 21:21:20,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 940 places, 878 transitions, 1966 flow, removed 435 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:20,185 INFO L242 Difference]: Finished difference. Result has 940 places, 866 transitions, 1882 flow [2022-07-19 21:21:20,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1906, PETRI_DIFFERENCE_MINUEND_PLACES=939, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1882, PETRI_PLACES=940, PETRI_TRANSITIONS=866} [2022-07-19 21:21:20,186 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 0 predicate places. [2022-07-19 21:21:20,186 INFO L495 AbstractCegarLoop]: Abstraction has has 940 places, 866 transitions, 1882 flow [2022-07-19 21:21:20,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 848.5) internal successors, (1697), 2 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:20,187 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:20,187 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:20,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-07-19 21:21:20,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1038488295, now seen corresponding path program 1 times [2022-07-19 21:21:20,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:20,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635849242] [2022-07-19 21:21:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:20,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:20,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:20,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635849242] [2022-07-19 21:21:20,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635849242] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:20,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:20,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:21:20,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698616414] [2022-07-19 21:21:20,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:20,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:21:20,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:21:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:21:20,217 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 841 out of 1063 [2022-07-19 21:21:20,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 940 places, 866 transitions, 1882 flow. Second operand has 3 states, 3 states have (on average 842.0) internal successors, (2526), 3 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:20,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:20,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 841 of 1063 [2022-07-19 21:21:20,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:20,926 INFO L129 PetriNetUnfolder]: 0/1508 cut-off events. [2022-07-19 21:21:20,926 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-19 21:21:20,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 1508 events. 0/1508 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5351 event pairs, 0 based on Foata normal form. 0/1478 useless extension candidates. Maximal degree in co-relation 0. Up to 180 conditions per place. [2022-07-19 21:21:20,929 INFO L132 encePairwiseOnDemand]: 1060/1063 looper letters, 39 selfloop transitions, 2 changer transitions 0/870 dead transitions. [2022-07-19 21:21:20,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 870 transitions, 1972 flow [2022-07-19 21:21:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:21:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:21:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2565 transitions. [2022-07-19 21:21:20,931 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8043273753527752 [2022-07-19 21:21:20,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2565 transitions. [2022-07-19 21:21:20,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2565 transitions. [2022-07-19 21:21:20,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:20,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2565 transitions. [2022-07-19 21:21:20,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 855.0) internal successors, (2565), 3 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:20,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1063.0) internal successors, (4252), 4 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:20,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1063.0) internal successors, (4252), 4 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:20,935 INFO L186 Difference]: Start difference. First operand has 940 places, 866 transitions, 1882 flow. Second operand 3 states and 2565 transitions. [2022-07-19 21:21:20,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 870 transitions, 1972 flow [2022-07-19 21:21:20,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 930 places, 870 transitions, 1972 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:20,943 INFO L242 Difference]: Finished difference. Result has 931 places, 867 transitions, 1894 flow [2022-07-19 21:21:20,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1894, PETRI_PLACES=931, PETRI_TRANSITIONS=867} [2022-07-19 21:21:20,944 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, -9 predicate places. [2022-07-19 21:21:20,944 INFO L495 AbstractCegarLoop]: Abstraction has has 931 places, 867 transitions, 1894 flow [2022-07-19 21:21:20,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 842.0) internal successors, (2526), 3 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:20,944 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:20,944 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] [2022-07-19 21:21:20,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-07-19 21:21:20,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash 903602880, now seen corresponding path program 1 times [2022-07-19 21:21:20,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149091629] [2022-07-19 21:21:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:20,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:20,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149091629] [2022-07-19 21:21:20,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149091629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:20,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599311044] [2022-07-19 21:21:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:20,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:20,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:20,972 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:20,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-07-19 21:21:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:21,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:21:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:21,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:21,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599311044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:21,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:21,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:21:21,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124707683] [2022-07-19 21:21:21,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:21,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:21:21,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:21,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:21:21,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:21:21,833 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-19 21:21:21,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 931 places, 867 transitions, 1894 flow. Second operand has 10 states, 10 states have (on average 842.3) internal successors, (8423), 10 states have internal predecessors, (8423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:21,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:21,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-19 21:21:21,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:22,586 INFO L129 PetriNetUnfolder]: 0/1482 cut-off events. [2022-07-19 21:21:22,586 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-07-19 21:21:22,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 1482 events. 0/1482 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5191 event pairs, 0 based on Foata normal form. 2/1484 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-07-19 21:21:22,588 INFO L132 encePairwiseOnDemand]: 1057/1063 looper letters, 40 selfloop transitions, 9 changer transitions 0/877 dead transitions. [2022-07-19 21:21:22,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 939 places, 877 transitions, 2014 flow [2022-07-19 21:21:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7611 transitions. [2022-07-19 21:21:22,592 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7955471934775792 [2022-07-19 21:21:22,592 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7611 transitions. [2022-07-19 21:21:22,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7611 transitions. [2022-07-19 21:21:22,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:22,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7611 transitions. [2022-07-19 21:21:22,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 845.6666666666666) internal successors, (7611), 9 states have internal predecessors, (7611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:22,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1063.0) internal successors, (10630), 10 states have internal predecessors, (10630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:22,601 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1063.0) internal successors, (10630), 10 states have internal predecessors, (10630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:22,601 INFO L186 Difference]: Start difference. First operand has 931 places, 867 transitions, 1894 flow. Second operand 9 states and 7611 transitions. [2022-07-19 21:21:22,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 939 places, 877 transitions, 2014 flow [2022-07-19 21:21:22,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 938 places, 877 transitions, 2012 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:22,610 INFO L242 Difference]: Finished difference. Result has 941 places, 873 transitions, 1942 flow [2022-07-19 21:21:22,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1942, PETRI_PLACES=941, PETRI_TRANSITIONS=873} [2022-07-19 21:21:22,610 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 1 predicate places. [2022-07-19 21:21:22,611 INFO L495 AbstractCegarLoop]: Abstraction has has 941 places, 873 transitions, 1942 flow [2022-07-19 21:21:22,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 842.3) internal successors, (8423), 10 states have internal predecessors, (8423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:22,611 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:22,612 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] [2022-07-19 21:21:22,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:22,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:22,815 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:22,816 INFO L85 PathProgramCache]: Analyzing trace with hash 775653557, now seen corresponding path program 1 times [2022-07-19 21:21:22,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:22,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333843336] [2022-07-19 21:21:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:22,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:22,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:22,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333843336] [2022-07-19 21:21:22,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333843336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:22,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028345207] [2022-07-19 21:21:22,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:22,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:22,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:22,868 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:22,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-07-19 21:21:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:23,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:21:23,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:23,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:23,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028345207] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:23,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:23,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:21:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664120093] [2022-07-19 21:21:23,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:23,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:21:23,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:21:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:23,492 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-19 21:21:23,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 941 places, 873 transitions, 1942 flow. Second operand has 18 states, 18 states have (on average 842.6111111111111) internal successors, (15167), 18 states have internal predecessors, (15167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:23,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:23,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-19 21:21:23,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:24,456 INFO L129 PetriNetUnfolder]: 0/1430 cut-off events. [2022-07-19 21:21:24,456 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-19 21:21:24,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2048 conditions, 1430 events. 0/1430 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4851 event pairs, 0 based on Foata normal form. 4/1434 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-07-19 21:21:24,459 INFO L132 encePairwiseOnDemand]: 1057/1063 looper letters, 48 selfloop transitions, 21 changer transitions 0/897 dead transitions. [2022-07-19 21:21:24,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 961 places, 897 transitions, 2188 flow [2022-07-19 21:21:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:21:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:21:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17713 transitions. [2022-07-19 21:21:24,467 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934865385476862 [2022-07-19 21:21:24,467 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17713 transitions. [2022-07-19 21:21:24,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17713 transitions. [2022-07-19 21:21:24,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:24,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17713 transitions. [2022-07-19 21:21:24,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 843.4761904761905) internal successors, (17713), 21 states have internal predecessors, (17713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:24,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1063.0) internal successors, (23386), 22 states have internal predecessors, (23386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:24,488 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1063.0) internal successors, (23386), 22 states have internal predecessors, (23386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:24,489 INFO L186 Difference]: Start difference. First operand has 941 places, 873 transitions, 1942 flow. Second operand 21 states and 17713 transitions. [2022-07-19 21:21:24,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 961 places, 897 transitions, 2188 flow [2022-07-19 21:21:24,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 960 places, 897 transitions, 2174 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:24,499 INFO L242 Difference]: Finished difference. Result has 965 places, 886 transitions, 2066 flow [2022-07-19 21:21:24,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=940, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2066, PETRI_PLACES=965, PETRI_TRANSITIONS=886} [2022-07-19 21:21:24,500 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 25 predicate places. [2022-07-19 21:21:24,500 INFO L495 AbstractCegarLoop]: Abstraction has has 965 places, 886 transitions, 2066 flow [2022-07-19 21:21:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 842.6111111111111) internal successors, (15167), 18 states have internal predecessors, (15167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:24,501 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:24,501 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:24,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:24,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:24,715 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:24,716 INFO L85 PathProgramCache]: Analyzing trace with hash 286763691, now seen corresponding path program 1 times [2022-07-19 21:21:24,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:24,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602136599] [2022-07-19 21:21:24,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:24,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:24,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:24,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602136599] [2022-07-19 21:21:24,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602136599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:24,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833384245] [2022-07-19 21:21:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:24,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:24,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:24,829 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:24,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-07-19 21:21:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:25,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:21:25,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:25,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:25,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833384245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:25,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:25,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:21:25,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469516630] [2022-07-19 21:21:25,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:25,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:21:25,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:25,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:21:25,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:21:25,932 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-19 21:21:25,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 965 places, 886 transitions, 2066 flow. Second operand has 34 states, 34 states have (on average 842.7941176470588) internal successors, (28655), 34 states have internal predecessors, (28655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:25,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:25,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-19 21:21:25,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:27,072 INFO L129 PetriNetUnfolder]: 0/1326 cut-off events. [2022-07-19 21:21:27,072 INFO L130 PetriNetUnfolder]: For 681/681 co-relation queries the response was YES. [2022-07-19 21:21:27,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 1326 events. 0/1326 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4170 event pairs, 0 based on Foata normal form. 8/1334 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-19 21:21:27,075 INFO L132 encePairwiseOnDemand]: 1057/1063 looper letters, 64 selfloop transitions, 45 changer transitions 0/937 dead transitions. [2022-07-19 21:21:27,076 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1009 places, 937 transitions, 2600 flow [2022-07-19 21:21:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:21:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:21:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 37917 transitions. [2022-07-19 21:21:27,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926622765757291 [2022-07-19 21:21:27,095 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 37917 transitions. [2022-07-19 21:21:27,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 37917 transitions. [2022-07-19 21:21:27,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:27,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 37917 transitions. [2022-07-19 21:21:27,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 842.6) internal successors, (37917), 45 states have internal predecessors, (37917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:27,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1063.0) internal successors, (48898), 46 states have internal predecessors, (48898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:27,162 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1063.0) internal successors, (48898), 46 states have internal predecessors, (48898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:27,162 INFO L186 Difference]: Start difference. First operand has 965 places, 886 transitions, 2066 flow. Second operand 45 states and 37917 transitions. [2022-07-19 21:21:27,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1009 places, 937 transitions, 2600 flow [2022-07-19 21:21:27,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1003 places, 937 transitions, 2560 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:27,178 INFO L242 Difference]: Finished difference. Result has 1012 places, 911 transitions, 2344 flow [2022-07-19 21:21:27,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=959, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=863, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2344, PETRI_PLACES=1012, PETRI_TRANSITIONS=911} [2022-07-19 21:21:27,179 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 72 predicate places. [2022-07-19 21:21:27,179 INFO L495 AbstractCegarLoop]: Abstraction has has 1012 places, 911 transitions, 2344 flow [2022-07-19 21:21:27,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 842.7941176470588) internal successors, (28655), 34 states have internal predecessors, (28655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:27,182 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:27,182 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:27,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:27,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:27,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1745244473, now seen corresponding path program 1 times [2022-07-19 21:21:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:27,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625398868] [2022-07-19 21:21:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:27,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:27,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:27,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625398868] [2022-07-19 21:21:27,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625398868] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:27,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976493563] [2022-07-19 21:21:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:27,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:27,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:27,710 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:27,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-07-19 21:21:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:28,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:21:28,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:28,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:29,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976493563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:29,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:29,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:21:29,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660890758] [2022-07-19 21:21:29,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:29,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:21:29,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:29,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:21:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:21:29,483 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-19 21:21:29,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1012 places, 911 transitions, 2344 flow. Second operand has 66 states, 66 states have (on average 842.8939393939394) internal successors, (55631), 66 states have internal predecessors, (55631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:29,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:29,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-19 21:21:29,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:30,982 INFO L129 PetriNetUnfolder]: 0/1118 cut-off events. [2022-07-19 21:21:30,983 INFO L130 PetriNetUnfolder]: For 2103/2103 co-relation queries the response was YES. [2022-07-19 21:21:30,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1915 conditions, 1118 events. 0/1118 cut-off events. For 2103/2103 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2835 event pairs, 0 based on Foata normal form. 16/1134 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2022-07-19 21:21:30,984 INFO L132 encePairwiseOnDemand]: 1058/1063 looper letters, 93 selfloop transitions, 91 changer transitions 0/1000 dead transitions. [2022-07-19 21:21:30,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1091 places, 1000 transitions, 3462 flow [2022-07-19 21:21:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:21:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:21:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 78320 transitions. [2022-07-19 21:21:31,017 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922394521490204 [2022-07-19 21:21:31,017 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 78320 transitions. [2022-07-19 21:21:31,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 78320 transitions. [2022-07-19 21:21:31,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:31,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 78320 transitions. [2022-07-19 21:21:31,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 842.1505376344086) internal successors, (78320), 93 states have internal predecessors, (78320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1063.0) internal successors, (99922), 94 states have internal predecessors, (99922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,141 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1063.0) internal successors, (99922), 94 states have internal predecessors, (99922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,142 INFO L186 Difference]: Start difference. First operand has 1012 places, 911 transitions, 2344 flow. Second operand 93 states and 78320 transitions. [2022-07-19 21:21:31,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1091 places, 1000 transitions, 3462 flow [2022-07-19 21:21:31,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1058 places, 1000 transitions, 3213 flow, removed 25 selfloop flow, removed 33 redundant places. [2022-07-19 21:21:31,154 INFO L242 Difference]: Finished difference. Result has 1058 places, 943 transitions, 2703 flow [2022-07-19 21:21:31,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=966, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=2703, PETRI_PLACES=1058, PETRI_TRANSITIONS=943} [2022-07-19 21:21:31,155 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 118 predicate places. [2022-07-19 21:21:31,155 INFO L495 AbstractCegarLoop]: Abstraction has has 1058 places, 943 transitions, 2703 flow [2022-07-19 21:21:31,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 842.8939393939394) internal successors, (55631), 66 states have internal predecessors, (55631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,160 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:31,160 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:31,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-07-19 21:21:31,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-07-19 21:21:31,381 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:31,382 INFO L85 PathProgramCache]: Analyzing trace with hash -368607812, now seen corresponding path program 1 times [2022-07-19 21:21:31,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:31,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550298763] [2022-07-19 21:21:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:31,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:31,451 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:21:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:31,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:21:31,545 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:21:31,545 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:21:31,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:21:31,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-07-19 21:21:31,545 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:31,546 WARN L231 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:21:31,546 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2022-07-19 21:21:31,616 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:21:31,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 969 places, 1096 transitions, 3277 flow [2022-07-19 21:21:32,644 INFO L129 PetriNetUnfolder]: 314/2300 cut-off events. [2022-07-19 21:21:32,644 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-19 21:21:32,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2890 conditions, 2300 events. 314/2300 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8760 event pairs, 0 based on Foata normal form. 0/1922 useless extension candidates. Maximal degree in co-relation 2756. Up to 64 conditions per place. [2022-07-19 21:21:32,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 969 places, 1096 transitions, 3277 flow [2022-07-19 21:21:32,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 969 places, 1096 transitions, 3277 flow [2022-07-19 21:21:32,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:21:32,923 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:21:32,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:21:32,927 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2022-07-19 21:21:32,927 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:21:32,927 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:32,927 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:32,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash 601694695, now seen corresponding path program 1 times [2022-07-19 21:21:32,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:32,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296121234] [2022-07-19 21:21:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:32,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:32,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:32,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296121234] [2022-07-19 21:21:32,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296121234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:32,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:32,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:21:32,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635283135] [2022-07-19 21:21:32,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:32,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:21:32,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:32,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:21:32,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:21:32,954 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 867 out of 1096 [2022-07-19 21:21:32,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 1096 transitions, 3277 flow. Second operand has 3 states, 3 states have (on average 868.0) internal successors, (2604), 3 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:32,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:32,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 867 of 1096 [2022-07-19 21:21:32,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:34,014 INFO L129 PetriNetUnfolder]: 0/1929 cut-off events. [2022-07-19 21:21:34,015 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-19 21:21:34,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2710 conditions, 1929 events. 0/1929 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8200 event pairs, 0 based on Foata normal form. 16734/18601 useless extension candidates. Maximal degree in co-relation 0. Up to 186 conditions per place. [2022-07-19 21:21:34,018 INFO L132 encePairwiseOnDemand]: 903/1096 looper letters, 40 selfloop transitions, 2 changer transitions 12/909 dead transitions. [2022-07-19 21:21:34,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 909 transitions, 2987 flow [2022-07-19 21:21:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:21:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:21:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2841 transitions. [2022-07-19 21:21:34,020 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8640510948905109 [2022-07-19 21:21:34,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2841 transitions. [2022-07-19 21:21:34,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2841 transitions. [2022-07-19 21:21:34,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:34,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2841 transitions. [2022-07-19 21:21:34,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 947.0) internal successors, (2841), 3 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:34,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1096.0) internal successors, (4384), 4 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:34,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1096.0) internal successors, (4384), 4 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:34,024 INFO L186 Difference]: Start difference. First operand has 969 places, 1096 transitions, 3277 flow. Second operand 3 states and 2841 transitions. [2022-07-19 21:21:34,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 970 places, 909 transitions, 2987 flow [2022-07-19 21:21:34,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 970 places, 909 transitions, 2057 flow, removed 465 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:34,039 INFO L242 Difference]: Finished difference. Result has 971 places, 894 transitions, 1953 flow [2022-07-19 21:21:34,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=968, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=903, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1953, PETRI_PLACES=971, PETRI_TRANSITIONS=894} [2022-07-19 21:21:34,040 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 2 predicate places. [2022-07-19 21:21:34,040 INFO L495 AbstractCegarLoop]: Abstraction has has 971 places, 894 transitions, 1953 flow [2022-07-19 21:21:34,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 868.0) internal successors, (2604), 3 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:34,040 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:34,040 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] [2022-07-19 21:21:34,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-07-19 21:21:34,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash -796092704, now seen corresponding path program 1 times [2022-07-19 21:21:34,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:34,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989243450] [2022-07-19 21:21:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:34,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:34,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989243450] [2022-07-19 21:21:34,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989243450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409166534] [2022-07-19 21:21:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:34,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:34,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:34,071 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:34,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-07-19 21:21:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:21:34,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:34,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:34,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409166534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:34,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:34,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:21:34,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56780437] [2022-07-19 21:21:34,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:21:34,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:21:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:21:34,750 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-19 21:21:34,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 894 transitions, 1953 flow. Second operand has 10 states, 10 states have (on average 868.3) internal successors, (8683), 10 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:34,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:34,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-19 21:21:34,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:35,660 INFO L129 PetriNetUnfolder]: 0/1531 cut-off events. [2022-07-19 21:21:35,660 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-19 21:21:35,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 1531 events. 0/1531 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5374 event pairs, 0 based on Foata normal form. 2/1533 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-07-19 21:21:35,664 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 41 selfloop transitions, 9 changer transitions 0/904 dead transitions. [2022-07-19 21:21:35,664 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 904 transitions, 2075 flow [2022-07-19 21:21:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7846 transitions. [2022-07-19 21:21:35,668 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954176804541768 [2022-07-19 21:21:35,668 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7846 transitions. [2022-07-19 21:21:35,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7846 transitions. [2022-07-19 21:21:35,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:35,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7846 transitions. [2022-07-19 21:21:35,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 871.7777777777778) internal successors, (7846), 9 states have internal predecessors, (7846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1096.0) internal successors, (10960), 10 states have internal predecessors, (10960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,680 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1096.0) internal successors, (10960), 10 states have internal predecessors, (10960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,680 INFO L186 Difference]: Start difference. First operand has 971 places, 894 transitions, 1953 flow. Second operand 9 states and 7846 transitions. [2022-07-19 21:21:35,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 904 transitions, 2075 flow [2022-07-19 21:21:35,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 966 places, 904 transitions, 2073 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:35,690 INFO L242 Difference]: Finished difference. Result has 969 places, 900 transitions, 2001 flow [2022-07-19 21:21:35,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=958, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2001, PETRI_PLACES=969, PETRI_TRANSITIONS=900} [2022-07-19 21:21:35,691 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 0 predicate places. [2022-07-19 21:21:35,692 INFO L495 AbstractCegarLoop]: Abstraction has has 969 places, 900 transitions, 2001 flow [2022-07-19 21:21:35,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 868.3) internal successors, (8683), 10 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,692 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:35,693 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] [2022-07-19 21:21:35,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:35,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-07-19 21:21:35,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash -171585771, now seen corresponding path program 1 times [2022-07-19 21:21:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:35,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108426009] [2022-07-19 21:21:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:35,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:35,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108426009] [2022-07-19 21:21:35,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108426009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:35,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604553257] [2022-07-19 21:21:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:35,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:35,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:36,001 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:36,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-07-19 21:21:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:36,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:21:36,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:36,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:36,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604553257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:36,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:36,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:21:36,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175107149] [2022-07-19 21:21:36,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:36,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:21:36,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:36,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:21:36,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:36,923 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-19 21:21:36,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 900 transitions, 2001 flow. Second operand has 18 states, 18 states have (on average 868.6111111111111) internal successors, (15635), 18 states have internal predecessors, (15635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:36,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:36,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-19 21:21:36,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:37,894 INFO L129 PetriNetUnfolder]: 0/1479 cut-off events. [2022-07-19 21:21:37,894 INFO L130 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-07-19 21:21:37,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 1479 events. 0/1479 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5042 event pairs, 0 based on Foata normal form. 4/1483 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-07-19 21:21:37,897 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 49 selfloop transitions, 21 changer transitions 0/924 dead transitions. [2022-07-19 21:21:37,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 989 places, 924 transitions, 2249 flow [2022-07-19 21:21:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:21:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:21:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18260 transitions. [2022-07-19 21:21:37,906 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7933611400764685 [2022-07-19 21:21:37,906 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18260 transitions. [2022-07-19 21:21:37,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18260 transitions. [2022-07-19 21:21:37,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:37,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18260 transitions. [2022-07-19 21:21:37,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 869.5238095238095) internal successors, (18260), 21 states have internal predecessors, (18260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:37,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1096.0) internal successors, (24112), 22 states have internal predecessors, (24112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:37,934 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1096.0) internal successors, (24112), 22 states have internal predecessors, (24112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:37,935 INFO L186 Difference]: Start difference. First operand has 969 places, 900 transitions, 2001 flow. Second operand 21 states and 18260 transitions. [2022-07-19 21:21:37,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 989 places, 924 transitions, 2249 flow [2022-07-19 21:21:37,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 988 places, 924 transitions, 2235 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:37,962 INFO L242 Difference]: Finished difference. Result has 993 places, 913 transitions, 2125 flow [2022-07-19 21:21:37,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=968, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2125, PETRI_PLACES=993, PETRI_TRANSITIONS=913} [2022-07-19 21:21:37,975 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 24 predicate places. [2022-07-19 21:21:37,975 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 913 transitions, 2125 flow [2022-07-19 21:21:37,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 868.6111111111111) internal successors, (15635), 18 states have internal predecessors, (15635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:37,977 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:37,977 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:38,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:38,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:38,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:38,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1582942837, now seen corresponding path program 1 times [2022-07-19 21:21:38,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:38,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560511686] [2022-07-19 21:21:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:38,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:38,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:38,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560511686] [2022-07-19 21:21:38,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560511686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:38,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454363837] [2022-07-19 21:21:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:38,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:38,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:38,293 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:38,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-07-19 21:21:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:39,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:21:39,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:39,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:39,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454363837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:39,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:39,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:21:39,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332974274] [2022-07-19 21:21:39,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:39,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:21:39,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:21:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:21:39,582 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-19 21:21:39,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 993 places, 913 transitions, 2125 flow. Second operand has 34 states, 34 states have (on average 868.7941176470588) internal successors, (29539), 34 states have internal predecessors, (29539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:39,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:39,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-19 21:21:39,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:40,924 INFO L129 PetriNetUnfolder]: 0/1375 cut-off events. [2022-07-19 21:21:40,924 INFO L130 PetriNetUnfolder]: For 708/708 co-relation queries the response was YES. [2022-07-19 21:21:40,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 1375 events. 0/1375 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4351 event pairs, 0 based on Foata normal form. 8/1383 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-19 21:21:40,927 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 65 selfloop transitions, 45 changer transitions 0/964 dead transitions. [2022-07-19 21:21:40,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1037 places, 964 transitions, 2661 flow [2022-07-19 21:21:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:21:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:21:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 39088 transitions. [2022-07-19 21:21:40,943 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925385239253853 [2022-07-19 21:21:40,944 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 39088 transitions. [2022-07-19 21:21:40,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 39088 transitions. [2022-07-19 21:21:40,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:40,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 39088 transitions. [2022-07-19 21:21:40,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 868.6222222222223) internal successors, (39088), 45 states have internal predecessors, (39088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:40,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1096.0) internal successors, (50416), 46 states have internal predecessors, (50416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:41,005 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1096.0) internal successors, (50416), 46 states have internal predecessors, (50416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:41,006 INFO L186 Difference]: Start difference. First operand has 993 places, 913 transitions, 2125 flow. Second operand 45 states and 39088 transitions. [2022-07-19 21:21:41,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1037 places, 964 transitions, 2661 flow [2022-07-19 21:21:41,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1031 places, 964 transitions, 2621 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:41,017 INFO L242 Difference]: Finished difference. Result has 1040 places, 938 transitions, 2403 flow [2022-07-19 21:21:41,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=987, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=890, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2403, PETRI_PLACES=1040, PETRI_TRANSITIONS=938} [2022-07-19 21:21:41,018 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 71 predicate places. [2022-07-19 21:21:41,018 INFO L495 AbstractCegarLoop]: Abstraction has has 1040 places, 938 transitions, 2403 flow [2022-07-19 21:21:41,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 868.7941176470588) internal successors, (29539), 34 states have internal predecessors, (29539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:41,021 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:41,022 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:41,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:41,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:41,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:41,243 INFO L85 PathProgramCache]: Analyzing trace with hash 294994599, now seen corresponding path program 1 times [2022-07-19 21:21:41,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:41,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873563085] [2022-07-19 21:21:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:41,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:41,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873563085] [2022-07-19 21:21:41,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873563085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838599881] [2022-07-19 21:21:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:41,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:41,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:41,540 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:41,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-07-19 21:21:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:21:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:42,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:43,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838599881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:43,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:43,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:21:43,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212462761] [2022-07-19 21:21:43,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:43,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:21:43,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:21:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:21:43,398 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-19 21:21:43,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1040 places, 938 transitions, 2403 flow. Second operand has 66 states, 66 states have (on average 868.8939393939394) internal successors, (57347), 66 states have internal predecessors, (57347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:43,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:43,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-19 21:21:43,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:44,991 INFO L129 PetriNetUnfolder]: 0/1167 cut-off events. [2022-07-19 21:21:44,992 INFO L130 PetriNetUnfolder]: For 2224/2224 co-relation queries the response was YES. [2022-07-19 21:21:44,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 1167 events. 0/1167 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2991 event pairs, 0 based on Foata normal form. 16/1183 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2022-07-19 21:21:44,994 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 97 selfloop transitions, 93 changer transitions 0/1044 dead transitions. [2022-07-19 21:21:44,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1132 places, 1044 transitions, 3631 flow [2022-07-19 21:21:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:21:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:21:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 80744 transitions. [2022-07-19 21:21:45,030 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921670198571541 [2022-07-19 21:21:45,030 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 80744 transitions. [2022-07-19 21:21:45,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 80744 transitions. [2022-07-19 21:21:45,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:45,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 80744 transitions. [2022-07-19 21:21:45,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 868.2150537634409) internal successors, (80744), 93 states have internal predecessors, (80744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:45,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1096.0) internal successors, (103024), 94 states have internal predecessors, (103024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:45,264 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1096.0) internal successors, (103024), 94 states have internal predecessors, (103024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:45,265 INFO L186 Difference]: Start difference. First operand has 1040 places, 938 transitions, 2403 flow. Second operand 93 states and 80744 transitions. [2022-07-19 21:21:45,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1132 places, 1044 transitions, 3631 flow [2022-07-19 21:21:45,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1114 places, 1044 transitions, 3543 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-19 21:21:45,279 INFO L242 Difference]: Finished difference. Result has 1131 places, 987 transitions, 3037 flow [2022-07-19 21:21:45,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=1022, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3037, PETRI_PLACES=1131, PETRI_TRANSITIONS=987} [2022-07-19 21:21:45,280 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 162 predicate places. [2022-07-19 21:21:45,280 INFO L495 AbstractCegarLoop]: Abstraction has has 1131 places, 987 transitions, 3037 flow [2022-07-19 21:21:45,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 868.8939393939394) internal successors, (57347), 66 states have internal predecessors, (57347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:45,287 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:45,287 INFO L200 CegarLoopForPetriNet]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:45,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:45,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-07-19 21:21:45,489 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:45,489 INFO L85 PathProgramCache]: Analyzing trace with hash 323483123, now seen corresponding path program 1 times [2022-07-19 21:21:45,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:45,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477716378] [2022-07-19 21:21:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:45,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:45,527 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:21:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:45,597 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:21:45,598 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:21:45,598 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:21:45,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:21:45,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2022-07-19 21:21:45,598 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:21:45,600 WARN L231 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:21:45,600 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2022-07-19 21:21:45,663 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:21:45,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 998 places, 1129 transitions, 3410 flow [2022-07-19 21:21:46,643 INFO L129 PetriNetUnfolder]: 324/2372 cut-off events. [2022-07-19 21:21:46,644 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-19 21:21:46,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 2372 events. 324/2372 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9000 event pairs, 0 based on Foata normal form. 0/1982 useless extension candidates. Maximal degree in co-relation 2862. Up to 66 conditions per place. [2022-07-19 21:21:46,865 INFO L82 GeneralOperation]: Start removeDead. Operand has 998 places, 1129 transitions, 3410 flow [2022-07-19 21:21:46,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 998 places, 1129 transitions, 3410 flow [2022-07-19 21:21:46,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:21:46,950 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:21:46,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:21:46,954 INFO L129 PetriNetUnfolder]: 5/91 cut-off events. [2022-07-19 21:21:46,954 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:21:46,954 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:46,954 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:46,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1903437767, now seen corresponding path program 1 times [2022-07-19 21:21:46,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:46,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311025856] [2022-07-19 21:21:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:46,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:46,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:46,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311025856] [2022-07-19 21:21:46,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311025856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:46,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:46,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:21:46,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932263288] [2022-07-19 21:21:46,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:46,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:21:46,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:21:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:21:46,978 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 893 out of 1129 [2022-07-19 21:21:46,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 1129 transitions, 3410 flow. Second operand has 3 states, 3 states have (on average 894.0) internal successors, (2682), 3 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:46,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:46,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 893 of 1129 [2022-07-19 21:21:46,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:48,078 INFO L129 PetriNetUnfolder]: 0/1990 cut-off events. [2022-07-19 21:21:48,078 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-19 21:21:48,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2812 conditions, 1990 events. 0/1990 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8506 event pairs, 0 based on Foata normal form. 17849/19775 useless extension candidates. Maximal degree in co-relation 0. Up to 192 conditions per place. [2022-07-19 21:21:48,082 INFO L132 encePairwiseOnDemand]: 930/1129 looper letters, 41 selfloop transitions, 2 changer transitions 12/936 dead transitions. [2022-07-19 21:21:48,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 999 places, 936 transitions, 3110 flow [2022-07-19 21:21:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:21:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:21:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2926 transitions. [2022-07-19 21:21:48,084 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.863891349276646 [2022-07-19 21:21:48,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2926 transitions. [2022-07-19 21:21:48,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2926 transitions. [2022-07-19 21:21:48,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:48,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2926 transitions. [2022-07-19 21:21:48,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 975.3333333333334) internal successors, (2926), 3 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:48,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:48,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:48,088 INFO L186 Difference]: Start difference. First operand has 998 places, 1129 transitions, 3410 flow. Second operand 3 states and 2926 transitions. [2022-07-19 21:21:48,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 999 places, 936 transitions, 3110 flow [2022-07-19 21:21:48,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 999 places, 936 transitions, 2118 flow, removed 496 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:48,103 INFO L242 Difference]: Finished difference. Result has 1000 places, 921 transitions, 2012 flow [2022-07-19 21:21:48,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2012, PETRI_PLACES=1000, PETRI_TRANSITIONS=921} [2022-07-19 21:21:48,106 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 2 predicate places. [2022-07-19 21:21:48,106 INFO L495 AbstractCegarLoop]: Abstraction has has 1000 places, 921 transitions, 2012 flow [2022-07-19 21:21:48,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 894.0) internal successors, (2682), 3 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:48,107 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:48,107 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] [2022-07-19 21:21:48,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2022-07-19 21:21:48,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:48,107 INFO L85 PathProgramCache]: Analyzing trace with hash 774696576, now seen corresponding path program 1 times [2022-07-19 21:21:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:48,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100832063] [2022-07-19 21:21:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:48,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:48,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:48,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100832063] [2022-07-19 21:21:48,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100832063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:48,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634344351] [2022-07-19 21:21:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:48,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:48,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:48,137 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:48,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-07-19 21:21:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:49,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:21:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:49,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:49,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634344351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:49,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:49,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:21:49,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042576607] [2022-07-19 21:21:49,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:49,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:21:49,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:21:49,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:21:49,076 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-19 21:21:49,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1000 places, 921 transitions, 2012 flow. Second operand has 10 states, 10 states have (on average 894.3) internal successors, (8943), 10 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:49,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:49,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-19 21:21:49,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:49,961 INFO L129 PetriNetUnfolder]: 0/1580 cut-off events. [2022-07-19 21:21:49,961 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-19 21:21:49,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 1580 events. 0/1580 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5561 event pairs, 0 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-07-19 21:21:49,964 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 42 selfloop transitions, 9 changer transitions 0/931 dead transitions. [2022-07-19 21:21:49,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 931 transitions, 2136 flow [2022-07-19 21:21:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8081 transitions. [2022-07-19 21:21:49,969 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7952957386084046 [2022-07-19 21:21:49,969 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8081 transitions. [2022-07-19 21:21:49,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8081 transitions. [2022-07-19 21:21:49,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:49,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8081 transitions. [2022-07-19 21:21:50,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 897.8888888888889) internal successors, (8081), 9 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:50,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1129.0) internal successors, (11290), 10 states have internal predecessors, (11290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:50,057 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1129.0) internal successors, (11290), 10 states have internal predecessors, (11290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:50,057 INFO L186 Difference]: Start difference. First operand has 1000 places, 921 transitions, 2012 flow. Second operand 9 states and 8081 transitions. [2022-07-19 21:21:50,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 931 transitions, 2136 flow [2022-07-19 21:21:50,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 995 places, 931 transitions, 2134 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:50,065 INFO L242 Difference]: Finished difference. Result has 998 places, 927 transitions, 2060 flow [2022-07-19 21:21:50,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=987, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2060, PETRI_PLACES=998, PETRI_TRANSITIONS=927} [2022-07-19 21:21:50,066 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 0 predicate places. [2022-07-19 21:21:50,066 INFO L495 AbstractCegarLoop]: Abstraction has has 998 places, 927 transitions, 2060 flow [2022-07-19 21:21:50,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 894.3) internal successors, (8943), 10 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:50,067 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:50,067 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] [2022-07-19 21:21:50,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:50,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:50,288 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1043544629, now seen corresponding path program 1 times [2022-07-19 21:21:50,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:50,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489999243] [2022-07-19 21:21:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:50,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:50,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:50,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489999243] [2022-07-19 21:21:50,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489999243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:50,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785676308] [2022-07-19 21:21:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:50,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:50,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:50,337 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:50,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-07-19 21:21:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:21:51,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:51,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:51,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785676308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:51,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:51,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:21:51,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096341764] [2022-07-19 21:21:51,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:51,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:21:51,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:21:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:51,338 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-19 21:21:51,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 927 transitions, 2060 flow. Second operand has 18 states, 18 states have (on average 894.6111111111111) internal successors, (16103), 18 states have internal predecessors, (16103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:51,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:51,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-19 21:21:51,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:52,300 INFO L129 PetriNetUnfolder]: 0/1528 cut-off events. [2022-07-19 21:21:52,300 INFO L130 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-07-19 21:21:52,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 1528 events. 0/1528 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5223 event pairs, 0 based on Foata normal form. 4/1532 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-07-19 21:21:52,303 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 50 selfloop transitions, 21 changer transitions 0/951 dead transitions. [2022-07-19 21:21:52,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1018 places, 951 transitions, 2310 flow [2022-07-19 21:21:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:21:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:21:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18807 transitions. [2022-07-19 21:21:52,335 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.793243072251044 [2022-07-19 21:21:52,336 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18807 transitions. [2022-07-19 21:21:52,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18807 transitions. [2022-07-19 21:21:52,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:52,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18807 transitions. [2022-07-19 21:21:52,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 895.5714285714286) internal successors, (18807), 21 states have internal predecessors, (18807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:52,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1129.0) internal successors, (24838), 22 states have internal predecessors, (24838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:52,360 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1129.0) internal successors, (24838), 22 states have internal predecessors, (24838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:52,360 INFO L186 Difference]: Start difference. First operand has 998 places, 927 transitions, 2060 flow. Second operand 21 states and 18807 transitions. [2022-07-19 21:21:52,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1018 places, 951 transitions, 2310 flow [2022-07-19 21:21:52,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1017 places, 951 transitions, 2296 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:52,370 INFO L242 Difference]: Finished difference. Result has 1022 places, 940 transitions, 2184 flow [2022-07-19 21:21:52,371 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2184, PETRI_PLACES=1022, PETRI_TRANSITIONS=940} [2022-07-19 21:21:52,371 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 24 predicate places. [2022-07-19 21:21:52,371 INFO L495 AbstractCegarLoop]: Abstraction has has 1022 places, 940 transitions, 2184 flow [2022-07-19 21:21:52,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 894.6111111111111) internal successors, (16103), 18 states have internal predecessors, (16103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:52,373 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:52,373 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:52,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:52,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:52,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:52,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:52,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1608022101, now seen corresponding path program 1 times [2022-07-19 21:21:52,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:52,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131656051] [2022-07-19 21:21:52,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:52,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:52,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:52,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131656051] [2022-07-19 21:21:52,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131656051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:52,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749227180] [2022-07-19 21:21:52,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:52,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:52,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:52,692 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:52,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-07-19 21:21:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:53,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:21:53,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:53,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:53,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749227180] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:53,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:53,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:21:53,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972948216] [2022-07-19 21:21:53,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:53,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:21:53,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:21:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:21:53,980 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-19 21:21:53,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1022 places, 940 transitions, 2184 flow. Second operand has 34 states, 34 states have (on average 894.7941176470588) internal successors, (30423), 34 states have internal predecessors, (30423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:53,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:53,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-19 21:21:53,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:55,358 INFO L129 PetriNetUnfolder]: 0/1424 cut-off events. [2022-07-19 21:21:55,359 INFO L130 PetriNetUnfolder]: For 735/735 co-relation queries the response was YES. [2022-07-19 21:21:55,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 1424 events. 0/1424 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4537 event pairs, 0 based on Foata normal form. 8/1432 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-19 21:21:55,361 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 66 selfloop transitions, 45 changer transitions 0/991 dead transitions. [2022-07-19 21:21:55,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1066 places, 991 transitions, 2722 flow [2022-07-19 21:21:55,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:21:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:21:55,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 40259 transitions. [2022-07-19 21:21:55,377 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924220057080996 [2022-07-19 21:21:55,378 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 40259 transitions. [2022-07-19 21:21:55,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 40259 transitions. [2022-07-19 21:21:55,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:55,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 40259 transitions. [2022-07-19 21:21:55,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 894.6444444444444) internal successors, (40259), 45 states have internal predecessors, (40259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:55,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1129.0) internal successors, (51934), 46 states have internal predecessors, (51934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:55,439 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1129.0) internal successors, (51934), 46 states have internal predecessors, (51934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:55,439 INFO L186 Difference]: Start difference. First operand has 1022 places, 940 transitions, 2184 flow. Second operand 45 states and 40259 transitions. [2022-07-19 21:21:55,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1066 places, 991 transitions, 2722 flow [2022-07-19 21:21:55,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1060 places, 991 transitions, 2682 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:55,451 INFO L242 Difference]: Finished difference. Result has 1069 places, 965 transitions, 2462 flow [2022-07-19 21:21:55,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=1016, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=917, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2462, PETRI_PLACES=1069, PETRI_TRANSITIONS=965} [2022-07-19 21:21:55,452 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 71 predicate places. [2022-07-19 21:21:55,452 INFO L495 AbstractCegarLoop]: Abstraction has has 1069 places, 965 transitions, 2462 flow [2022-07-19 21:21:55,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 894.7941176470588) internal successors, (30423), 34 states have internal predecessors, (30423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:55,455 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:55,455 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:55,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:55,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-07-19 21:21:55,671 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:55,672 INFO L85 PathProgramCache]: Analyzing trace with hash 312828615, now seen corresponding path program 1 times [2022-07-19 21:21:55,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:55,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340417357] [2022-07-19 21:21:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:55,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:55,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:55,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340417357] [2022-07-19 21:21:55,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340417357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:55,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181262378] [2022-07-19 21:21:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:55,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:55,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:55,983 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:55,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-07-19 21:21:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:56,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:21:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:57,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:57,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181262378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:57,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:57,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:21:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024937033] [2022-07-19 21:21:57,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:57,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:21:57,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:21:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:21:57,809 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-19 21:21:57,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1069 places, 965 transitions, 2462 flow. Second operand has 66 states, 66 states have (on average 894.8939393939394) internal successors, (59063), 66 states have internal predecessors, (59063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:57,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:57,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-19 21:21:57,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:59,491 INFO L129 PetriNetUnfolder]: 0/1216 cut-off events. [2022-07-19 21:21:59,491 INFO L130 PetriNetUnfolder]: For 2345/2345 co-relation queries the response was YES. [2022-07-19 21:21:59,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2098 conditions, 1216 events. 0/1216 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3174 event pairs, 0 based on Foata normal form. 16/1232 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-19 21:21:59,493 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 98 selfloop transitions, 93 changer transitions 0/1071 dead transitions. [2022-07-19 21:21:59,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1161 places, 1071 transitions, 3692 flow [2022-07-19 21:21:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:21:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:21:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 83163 transitions. [2022-07-19 21:21:59,526 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.792051201462899 [2022-07-19 21:21:59,526 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 83163 transitions. [2022-07-19 21:21:59,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 83163 transitions. [2022-07-19 21:21:59,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:59,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 83163 transitions. [2022-07-19 21:21:59,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 894.2258064516129) internal successors, (83163), 93 states have internal predecessors, (83163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:59,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1129.0) internal successors, (106126), 94 states have internal predecessors, (106126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:59,655 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1129.0) internal successors, (106126), 94 states have internal predecessors, (106126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:59,655 INFO L186 Difference]: Start difference. First operand has 1069 places, 965 transitions, 2462 flow. Second operand 93 states and 83163 transitions. [2022-07-19 21:21:59,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1161 places, 1071 transitions, 3692 flow [2022-07-19 21:21:59,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1143 places, 1071 transitions, 3604 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-19 21:21:59,669 INFO L242 Difference]: Finished difference. Result has 1160 places, 1014 transitions, 3096 flow [2022-07-19 21:21:59,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=1051, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3096, PETRI_PLACES=1160, PETRI_TRANSITIONS=1014} [2022-07-19 21:21:59,669 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 162 predicate places. [2022-07-19 21:21:59,670 INFO L495 AbstractCegarLoop]: Abstraction has has 1160 places, 1014 transitions, 3096 flow [2022-07-19 21:21:59,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 894.8939393939394) internal successors, (59063), 66 states have internal predecessors, (59063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:59,675 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:59,675 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:59,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-07-19 21:21:59,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-07-19 21:21:59,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:59,892 INFO L85 PathProgramCache]: Analyzing trace with hash -256812609, now seen corresponding path program 1 times [2022-07-19 21:21:59,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:59,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422094941] [2022-07-19 21:21:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:59,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:00,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:00,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422094941] [2022-07-19 21:22:00,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422094941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:00,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474326715] [2022-07-19 21:22:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:00,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:00,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:00,502 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:00,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-07-19 21:22:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:01,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 21:22:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:01,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:03,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474326715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:03,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:03,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-19 21:22:03,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63557052] [2022-07-19 21:22:03,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:03,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-19 21:22:03,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:03,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-19 21:22:03,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-19 21:22:03,570 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-19 21:22:03,611 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1160 places, 1014 transitions, 3096 flow. Second operand has 130 states, 130 states have (on average 894.9461538461538) internal successors, (116343), 130 states have internal predecessors, (116343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:03,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:03,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-19 21:22:03,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:05,980 INFO L129 PetriNetUnfolder]: 0/1190 cut-off events. [2022-07-19 21:22:05,981 INFO L130 PetriNetUnfolder]: For 1692/1692 co-relation queries the response was YES. [2022-07-19 21:22:05,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 1190 events. 0/1190 cut-off events. For 1692/1692 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3031 event pairs, 0 based on Foata normal form. 2/1192 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-19 21:22:05,983 INFO L132 encePairwiseOnDemand]: 1124/1129 looper letters, 99 selfloop transitions, 97 changer transitions 0/1064 dead transitions. [2022-07-19 21:22:05,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1245 places, 1064 transitions, 3872 flow [2022-07-19 21:22:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-19 21:22:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-07-19 21:22:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 88506 transitions. [2022-07-19 21:22:06,017 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.79185119574845 [2022-07-19 21:22:06,017 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 88506 transitions. [2022-07-19 21:22:06,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 88506 transitions. [2022-07-19 21:22:06,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:06,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 88506 transitions. [2022-07-19 21:22:06,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 894.0) internal successors, (88506), 99 states have internal predecessors, (88506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:06,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 1129.0) internal successors, (112900), 100 states have internal predecessors, (112900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:06,152 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 1129.0) internal successors, (112900), 100 states have internal predecessors, (112900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:06,153 INFO L186 Difference]: Start difference. First operand has 1160 places, 1014 transitions, 3096 flow. Second operand 99 states and 88506 transitions. [2022-07-19 21:22:06,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1245 places, 1064 transitions, 3872 flow [2022-07-19 21:22:06,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1172 places, 1064 transitions, 3540 flow, removed 19 selfloop flow, removed 73 redundant places. [2022-07-19 21:22:06,169 INFO L242 Difference]: Finished difference. Result has 1172 places, 1004 transitions, 2970 flow [2022-07-19 21:22:06,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=1074, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=2970, PETRI_PLACES=1172, PETRI_TRANSITIONS=1004} [2022-07-19 21:22:06,170 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 174 predicate places. [2022-07-19 21:22:06,170 INFO L495 AbstractCegarLoop]: Abstraction has has 1172 places, 1004 transitions, 2970 flow [2022-07-19 21:22:06,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 894.9461538461538) internal successors, (116343), 130 states have internal predecessors, (116343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:06,181 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:06,181 INFO L200 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:06,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-07-19 21:22:06,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-07-19 21:22:06,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:06,384 INFO L85 PathProgramCache]: Analyzing trace with hash -320541493, now seen corresponding path program 1 times [2022-07-19 21:22:06,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:06,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118245193] [2022-07-19 21:22:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:06,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:06,424 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:22:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:06,489 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:22:06,490 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:22:06,490 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:22:06,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:22:06,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2022-07-19 21:22:06,490 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:06,490 WARN L231 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:22:06,491 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2022-07-19 21:22:06,542 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:22:06,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1027 places, 1162 transitions, 3545 flow [2022-07-19 21:22:07,728 INFO L129 PetriNetUnfolder]: 334/2444 cut-off events. [2022-07-19 21:22:07,729 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-19 21:22:07,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 2444 events. 334/2444 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9259 event pairs, 0 based on Foata normal form. 0/2042 useless extension candidates. Maximal degree in co-relation 2969. Up to 68 conditions per place. [2022-07-19 21:22:07,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 1027 places, 1162 transitions, 3545 flow [2022-07-19 21:22:07,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1027 places, 1162 transitions, 3545 flow [2022-07-19 21:22:07,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:22:07,922 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:22:07,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:22:07,926 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-19 21:22:07,926 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:22:07,926 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:07,927 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:07,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:07,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:07,927 INFO L85 PathProgramCache]: Analyzing trace with hash 648750215, now seen corresponding path program 1 times [2022-07-19 21:22:07,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:07,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331813907] [2022-07-19 21:22:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:07,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:07,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331813907] [2022-07-19 21:22:07,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331813907] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:07,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:07,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:22:07,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901482246] [2022-07-19 21:22:07,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:07,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:22:07,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:07,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:22:07,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:22:07,950 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 919 out of 1162 [2022-07-19 21:22:07,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 1162 transitions, 3545 flow. Second operand has 3 states, 3 states have (on average 920.0) internal successors, (2760), 3 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:07,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:07,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 919 of 1162 [2022-07-19 21:22:07,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:09,169 INFO L129 PetriNetUnfolder]: 0/2051 cut-off events. [2022-07-19 21:22:09,170 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-19 21:22:09,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2915 conditions, 2051 events. 0/2051 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8779 event pairs, 0 based on Foata normal form. 19000/20985 useless extension candidates. Maximal degree in co-relation 0. Up to 198 conditions per place. [2022-07-19 21:22:09,173 INFO L132 encePairwiseOnDemand]: 957/1162 looper letters, 42 selfloop transitions, 2 changer transitions 12/963 dead transitions. [2022-07-19 21:22:09,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1028 places, 963 transitions, 3235 flow [2022-07-19 21:22:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:22:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:22:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3011 transitions. [2022-07-19 21:22:09,176 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8637406769936891 [2022-07-19 21:22:09,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3011 transitions. [2022-07-19 21:22:09,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3011 transitions. [2022-07-19 21:22:09,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:09,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3011 transitions. [2022-07-19 21:22:09,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1003.6666666666666) internal successors, (3011), 3 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:09,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1162.0) internal successors, (4648), 4 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:09,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1162.0) internal successors, (4648), 4 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:09,180 INFO L186 Difference]: Start difference. First operand has 1027 places, 1162 transitions, 3545 flow. Second operand 3 states and 3011 transitions. [2022-07-19 21:22:09,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1028 places, 963 transitions, 3235 flow [2022-07-19 21:22:09,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1028 places, 963 transitions, 2179 flow, removed 528 selfloop flow, removed 0 redundant places. [2022-07-19 21:22:09,194 INFO L242 Difference]: Finished difference. Result has 1029 places, 948 transitions, 2071 flow [2022-07-19 21:22:09,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=1026, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=957, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2071, PETRI_PLACES=1029, PETRI_TRANSITIONS=948} [2022-07-19 21:22:09,194 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 2 predicate places. [2022-07-19 21:22:09,194 INFO L495 AbstractCegarLoop]: Abstraction has has 1029 places, 948 transitions, 2071 flow [2022-07-19 21:22:09,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 920.0) internal successors, (2760), 3 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:09,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:09,195 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:09,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2022-07-19 21:22:09,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:09,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1321003424, now seen corresponding path program 1 times [2022-07-19 21:22:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:09,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237650363] [2022-07-19 21:22:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:09,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:09,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237650363] [2022-07-19 21:22:09,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237650363] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:09,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137561671] [2022-07-19 21:22:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:09,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:09,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:09,224 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:09,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-07-19 21:22:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:10,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:22:10,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:10,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:10,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137561671] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:10,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:10,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:22:10,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566126977] [2022-07-19 21:22:10,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:10,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:22:10,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:10,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:22:10,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:22:10,237 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-19 21:22:10,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1029 places, 948 transitions, 2071 flow. Second operand has 10 states, 10 states have (on average 920.3) internal successors, (9203), 10 states have internal predecessors, (9203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:10,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:10,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-19 21:22:10,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:11,274 INFO L129 PetriNetUnfolder]: 0/1629 cut-off events. [2022-07-19 21:22:11,274 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-07-19 21:22:11,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 1629 events. 0/1629 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5737 event pairs, 0 based on Foata normal form. 2/1631 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-07-19 21:22:11,277 INFO L132 encePairwiseOnDemand]: 1156/1162 looper letters, 43 selfloop transitions, 9 changer transitions 0/958 dead transitions. [2022-07-19 21:22:11,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1025 places, 958 transitions, 2197 flow [2022-07-19 21:22:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:22:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:22:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8316 transitions. [2022-07-19 21:22:11,281 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951807228915663 [2022-07-19 21:22:11,281 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8316 transitions. [2022-07-19 21:22:11,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8316 transitions. [2022-07-19 21:22:11,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:11,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8316 transitions. [2022-07-19 21:22:11,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:11,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1162.0) internal successors, (11620), 10 states have internal predecessors, (11620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:11,291 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1162.0) internal successors, (11620), 10 states have internal predecessors, (11620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:11,291 INFO L186 Difference]: Start difference. First operand has 1029 places, 948 transitions, 2071 flow. Second operand 9 states and 8316 transitions. [2022-07-19 21:22:11,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1025 places, 958 transitions, 2197 flow [2022-07-19 21:22:11,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1024 places, 958 transitions, 2195 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:11,300 INFO L242 Difference]: Finished difference. Result has 1027 places, 954 transitions, 2119 flow [2022-07-19 21:22:11,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=1016, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2119, PETRI_PLACES=1027, PETRI_TRANSITIONS=954} [2022-07-19 21:22:11,301 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 0 predicate places. [2022-07-19 21:22:11,301 INFO L495 AbstractCegarLoop]: Abstraction has has 1027 places, 954 transitions, 2119 flow [2022-07-19 21:22:11,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 920.3) internal successors, (9203), 10 states have internal predecessors, (9203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:11,302 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:11,302 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] [2022-07-19 21:22:11,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-07-19 21:22:11,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:11,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:11,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash 126077461, now seen corresponding path program 1 times [2022-07-19 21:22:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:11,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172486509] [2022-07-19 21:22:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:11,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:11,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172486509] [2022-07-19 21:22:11,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172486509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:11,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841671279] [2022-07-19 21:22:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:11,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:11,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:11,568 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:11,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-07-19 21:22:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:22:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:12,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:12,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841671279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:12,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:12,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:22:12,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255709426] [2022-07-19 21:22:12,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:12,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:22:12,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:22:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:22:12,641 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-19 21:22:12,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 954 transitions, 2119 flow. Second operand has 18 states, 18 states have (on average 920.6111111111111) internal successors, (16571), 18 states have internal predecessors, (16571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:12,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:12,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-19 21:22:12,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:13,678 INFO L129 PetriNetUnfolder]: 0/1577 cut-off events. [2022-07-19 21:22:13,678 INFO L130 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-07-19 21:22:13,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2257 conditions, 1577 events. 0/1577 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5405 event pairs, 0 based on Foata normal form. 4/1581 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-07-19 21:22:13,681 INFO L132 encePairwiseOnDemand]: 1156/1162 looper letters, 51 selfloop transitions, 21 changer transitions 0/978 dead transitions. [2022-07-19 21:22:13,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1047 places, 978 transitions, 2371 flow [2022-07-19 21:22:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:22:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:22:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19354 transitions. [2022-07-19 21:22:13,697 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931317105155316 [2022-07-19 21:22:13,697 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19354 transitions. [2022-07-19 21:22:13,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19354 transitions. [2022-07-19 21:22:13,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:13,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19354 transitions. [2022-07-19 21:22:13,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 921.6190476190476) internal successors, (19354), 21 states have internal predecessors, (19354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:13,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1162.0) internal successors, (25564), 22 states have internal predecessors, (25564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:13,719 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1162.0) internal successors, (25564), 22 states have internal predecessors, (25564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:13,719 INFO L186 Difference]: Start difference. First operand has 1027 places, 954 transitions, 2119 flow. Second operand 21 states and 19354 transitions. [2022-07-19 21:22:13,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1047 places, 978 transitions, 2371 flow [2022-07-19 21:22:13,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1046 places, 978 transitions, 2357 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:13,731 INFO L242 Difference]: Finished difference. Result has 1051 places, 967 transitions, 2243 flow [2022-07-19 21:22:13,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=1026, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2243, PETRI_PLACES=1051, PETRI_TRANSITIONS=967} [2022-07-19 21:22:13,731 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 24 predicate places. [2022-07-19 21:22:13,731 INFO L495 AbstractCegarLoop]: Abstraction has has 1051 places, 967 transitions, 2243 flow [2022-07-19 21:22:13,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 920.6111111111111) internal successors, (16571), 18 states have internal predecessors, (16571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:13,733 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:13,733 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:13,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:13,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-07-19 21:22:13,954 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:13,954 INFO L85 PathProgramCache]: Analyzing trace with hash 211525899, now seen corresponding path program 1 times [2022-07-19 21:22:13,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:13,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765260281] [2022-07-19 21:22:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:13,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:14,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765260281] [2022-07-19 21:22:14,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765260281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055961971] [2022-07-19 21:22:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:14,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:14,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:14,063 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:14,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-07-19 21:22:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:15,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:22:15,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:15,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:15,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055961971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:15,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:15,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:22:15,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905029765] [2022-07-19 21:22:15,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:15,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:22:15,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:22:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:22:15,318 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-19 21:22:15,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1051 places, 967 transitions, 2243 flow. Second operand has 34 states, 34 states have (on average 920.7941176470588) internal successors, (31307), 34 states have internal predecessors, (31307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:15,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:15,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-19 21:22:15,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:16,559 INFO L129 PetriNetUnfolder]: 0/1473 cut-off events. [2022-07-19 21:22:16,559 INFO L130 PetriNetUnfolder]: For 762/762 co-relation queries the response was YES. [2022-07-19 21:22:16,560 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 1473 events. 0/1473 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4720 event pairs, 0 based on Foata normal form. 8/1481 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-19 21:22:16,562 INFO L132 encePairwiseOnDemand]: 1156/1162 looper letters, 67 selfloop transitions, 45 changer transitions 0/1018 dead transitions. [2022-07-19 21:22:16,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1095 places, 1018 transitions, 2783 flow [2022-07-19 21:22:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:22:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:22:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 41430 transitions. [2022-07-19 21:22:16,580 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923121055651177 [2022-07-19 21:22:16,580 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 41430 transitions. [2022-07-19 21:22:16,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 41430 transitions. [2022-07-19 21:22:16,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:16,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 41430 transitions. [2022-07-19 21:22:16,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 920.6666666666666) internal successors, (41430), 45 states have internal predecessors, (41430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:16,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1162.0) internal successors, (53452), 46 states have internal predecessors, (53452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:16,642 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1162.0) internal successors, (53452), 46 states have internal predecessors, (53452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:16,642 INFO L186 Difference]: Start difference. First operand has 1051 places, 967 transitions, 2243 flow. Second operand 45 states and 41430 transitions. [2022-07-19 21:22:16,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1095 places, 1018 transitions, 2783 flow [2022-07-19 21:22:16,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1089 places, 1018 transitions, 2743 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:22:16,656 INFO L242 Difference]: Finished difference. Result has 1098 places, 992 transitions, 2521 flow [2022-07-19 21:22:16,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=1045, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2521, PETRI_PLACES=1098, PETRI_TRANSITIONS=992} [2022-07-19 21:22:16,656 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 71 predicate places. [2022-07-19 21:22:16,657 INFO L495 AbstractCegarLoop]: Abstraction has has 1098 places, 992 transitions, 2521 flow [2022-07-19 21:22:16,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 920.7941176470588) internal successors, (31307), 34 states have internal predecessors, (31307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:16,659 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:16,660 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:16,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-07-19 21:22:16,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:16,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:16,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1691742425, now seen corresponding path program 1 times [2022-07-19 21:22:16,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:16,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375840998] [2022-07-19 21:22:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:16,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:17,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375840998] [2022-07-19 21:22:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375840998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029876250] [2022-07-19 21:22:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:17,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:17,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:17,175 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:17,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-07-19 21:22:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:18,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:22:18,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:18,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:19,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029876250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:19,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:19,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:22:19,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757869760] [2022-07-19 21:22:19,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:19,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:22:19,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:19,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:22:19,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:22:19,098 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-19 21:22:19,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1098 places, 992 transitions, 2521 flow. Second operand has 66 states, 66 states have (on average 920.8939393939394) internal successors, (60779), 66 states have internal predecessors, (60779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:19,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:19,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-19 21:22:19,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:21,179 INFO L129 PetriNetUnfolder]: 0/1265 cut-off events. [2022-07-19 21:22:21,179 INFO L130 PetriNetUnfolder]: For 2466/2466 co-relation queries the response was YES. [2022-07-19 21:22:21,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2190 conditions, 1265 events. 0/1265 cut-off events. For 2466/2466 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3359 event pairs, 0 based on Foata normal form. 16/1281 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-07-19 21:22:21,181 INFO L132 encePairwiseOnDemand]: 1156/1162 looper letters, 99 selfloop transitions, 93 changer transitions 0/1098 dead transitions. [2022-07-19 21:22:21,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1190 places, 1098 transitions, 3753 flow [2022-07-19 21:22:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:22:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:22:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 85582 transitions. [2022-07-19 21:22:21,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.791941961393963 [2022-07-19 21:22:21,247 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 85582 transitions. [2022-07-19 21:22:21,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 85582 transitions. [2022-07-19 21:22:21,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:21,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 85582 transitions. [2022-07-19 21:22:21,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 920.236559139785) internal successors, (85582), 93 states have internal predecessors, (85582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:21,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1162.0) internal successors, (109228), 94 states have internal predecessors, (109228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:21,376 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1162.0) internal successors, (109228), 94 states have internal predecessors, (109228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:21,377 INFO L186 Difference]: Start difference. First operand has 1098 places, 992 transitions, 2521 flow. Second operand 93 states and 85582 transitions. [2022-07-19 21:22:21,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1190 places, 1098 transitions, 3753 flow [2022-07-19 21:22:21,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1172 places, 1098 transitions, 3665 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-19 21:22:21,391 INFO L242 Difference]: Finished difference. Result has 1189 places, 1041 transitions, 3155 flow [2022-07-19 21:22:21,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=1080, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3155, PETRI_PLACES=1189, PETRI_TRANSITIONS=1041} [2022-07-19 21:22:21,392 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 162 predicate places. [2022-07-19 21:22:21,392 INFO L495 AbstractCegarLoop]: Abstraction has has 1189 places, 1041 transitions, 3155 flow [2022-07-19 21:22:21,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 920.8939393939394) internal successors, (60779), 66 states have internal predecessors, (60779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:21,398 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:21,398 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:21,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-07-19 21:22:21,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:21,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1031984097, now seen corresponding path program 1 times [2022-07-19 21:22:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548855644] [2022-07-19 21:22:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:22,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548855644] [2022-07-19 21:22:22,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548855644] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179227110] [2022-07-19 21:22:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:22,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:22,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:22,371 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:22,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-07-19 21:22:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:23,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 21:22:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:23,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:25,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179227110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:25,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:25,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-19 21:22:25,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781816899] [2022-07-19 21:22:25,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:25,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-19 21:22:25,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:25,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-19 21:22:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-19 21:22:25,332 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-19 21:22:25,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1189 places, 1041 transitions, 3155 flow. Second operand has 130 states, 130 states have (on average 920.9461538461538) internal successors, (119723), 130 states have internal predecessors, (119723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:25,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:25,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-19 21:22:25,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:27,585 INFO L129 PetriNetUnfolder]: 0/1226 cut-off events. [2022-07-19 21:22:27,585 INFO L130 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2022-07-19 21:22:27,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2215 conditions, 1226 events. 0/1226 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3129 event pairs, 0 based on Foata normal form. 3/1229 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-07-19 21:22:27,587 INFO L132 encePairwiseOnDemand]: 1157/1162 looper letters, 102 selfloop transitions, 100 changer transitions 0/1096 dead transitions. [2022-07-19 21:22:27,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1277 places, 1096 transitions, 3997 flow [2022-07-19 21:22:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-07-19 21:22:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2022-07-19 21:22:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 93841 transitions. [2022-07-19 21:22:27,626 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7917468192096115 [2022-07-19 21:22:27,626 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 93841 transitions. [2022-07-19 21:22:27,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 93841 transitions. [2022-07-19 21:22:27,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:27,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 93841 transitions. [2022-07-19 21:22:27,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 920.0098039215686) internal successors, (93841), 102 states have internal predecessors, (93841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:27,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 1162.0) internal successors, (119686), 103 states have internal predecessors, (119686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:27,775 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 1162.0) internal successors, (119686), 103 states have internal predecessors, (119686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:27,775 INFO L186 Difference]: Start difference. First operand has 1189 places, 1041 transitions, 3155 flow. Second operand 102 states and 93841 transitions. [2022-07-19 21:22:27,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1277 places, 1096 transitions, 3997 flow [2022-07-19 21:22:27,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1204 places, 1096 transitions, 3655 flow, removed 20 selfloop flow, removed 73 redundant places. [2022-07-19 21:22:27,792 INFO L242 Difference]: Finished difference. Result has 1204 places, 1034 transitions, 3063 flow [2022-07-19 21:22:27,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=1103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=3063, PETRI_PLACES=1204, PETRI_TRANSITIONS=1034} [2022-07-19 21:22:27,793 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 177 predicate places. [2022-07-19 21:22:27,793 INFO L495 AbstractCegarLoop]: Abstraction has has 1204 places, 1034 transitions, 3063 flow [2022-07-19 21:22:27,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 920.9461538461538) internal successors, (119723), 130 states have internal predecessors, (119723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:27,805 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:27,806 INFO L200 CegarLoopForPetriNet]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:27,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:28,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:28,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:28,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1377354468, now seen corresponding path program 1 times [2022-07-19 21:22:28,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:28,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829666935] [2022-07-19 21:22:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:28,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:28,068 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:22:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:28,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:22:28,140 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:22:28,140 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:22:28,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:22:28,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2022-07-19 21:22:28,141 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:28,141 WARN L231 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:22:28,141 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2022-07-19 21:22:28,183 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:22:28,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1056 places, 1195 transitions, 3682 flow [2022-07-19 21:22:29,289 INFO L129 PetriNetUnfolder]: 344/2516 cut-off events. [2022-07-19 21:22:29,290 INFO L130 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2022-07-19 21:22:29,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3214 conditions, 2516 events. 344/2516 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9538 event pairs, 0 based on Foata normal form. 0/2102 useless extension candidates. Maximal degree in co-relation 3077. Up to 70 conditions per place. [2022-07-19 21:22:29,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 1056 places, 1195 transitions, 3682 flow [2022-07-19 21:22:29,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1056 places, 1195 transitions, 3682 flow [2022-07-19 21:22:29,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:22:29,629 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:22:29,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:22:29,632 INFO L129 PetriNetUnfolder]: 4/90 cut-off events. [2022-07-19 21:22:29,633 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:22:29,633 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:29,633 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:29,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:29,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1426002342, now seen corresponding path program 1 times [2022-07-19 21:22:29,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:29,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450211657] [2022-07-19 21:22:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:29,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:29,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:29,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450211657] [2022-07-19 21:22:29,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450211657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:29,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:29,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:22:29,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255306826] [2022-07-19 21:22:29,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:29,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:22:29,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:29,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:22:29,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:22:29,655 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 952 out of 1195 [2022-07-19 21:22:29,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1056 places, 1195 transitions, 3682 flow. Second operand has 2 states, 2 states have (on average 952.5) internal successors, (1905), 2 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:29,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:29,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 952 of 1195 [2022-07-19 21:22:29,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:30,721 INFO L129 PetriNetUnfolder]: 0/2137 cut-off events. [2022-07-19 21:22:30,721 INFO L130 PetriNetUnfolder]: For 7701/7701 co-relation queries the response was YES. [2022-07-19 21:22:30,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 2137 events. 0/2137 cut-off events. For 7701/7701 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9100 event pairs, 0 based on Foata normal form. 3514/5581 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-19 21:22:30,725 INFO L132 encePairwiseOnDemand]: 987/1195 looper letters, 34 selfloop transitions, 0 changer transitions 12/986 dead transitions. [2022-07-19 21:22:30,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1056 places, 986 transitions, 3332 flow [2022-07-19 21:22:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:22:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:22:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2146 transitions. [2022-07-19 21:22:30,727 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.897907949790795 [2022-07-19 21:22:30,727 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2146 transitions. [2022-07-19 21:22:30,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2146 transitions. [2022-07-19 21:22:30,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:30,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2146 transitions. [2022-07-19 21:22:30,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1073.0) internal successors, (2146), 2 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:30,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1195.0) internal successors, (3585), 3 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:30,730 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1195.0) internal successors, (3585), 3 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:30,730 INFO L186 Difference]: Start difference. First operand has 1056 places, 1195 transitions, 3682 flow. Second operand 2 states and 2146 transitions. [2022-07-19 21:22:30,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1056 places, 986 transitions, 3332 flow [2022-07-19 21:22:30,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1056 places, 986 transitions, 2210 flow, removed 561 selfloop flow, removed 0 redundant places. [2022-07-19 21:22:30,749 INFO L242 Difference]: Finished difference. Result has 1056 places, 974 transitions, 2118 flow [2022-07-19 21:22:30,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=1055, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=986, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=986, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2118, PETRI_PLACES=1056, PETRI_TRANSITIONS=974} [2022-07-19 21:22:30,749 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 0 predicate places. [2022-07-19 21:22:30,749 INFO L495 AbstractCegarLoop]: Abstraction has has 1056 places, 974 transitions, 2118 flow [2022-07-19 21:22:30,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 952.5) internal successors, (1905), 2 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:30,750 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:30,750 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:30,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2022-07-19 21:22:30,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1132599335, now seen corresponding path program 1 times [2022-07-19 21:22:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:30,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58037964] [2022-07-19 21:22:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:30,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:30,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:30,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58037964] [2022-07-19 21:22:30,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58037964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:30,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:30,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:22:30,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144480743] [2022-07-19 21:22:30,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:30,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:22:30,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:30,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:22:30,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:22:30,777 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 945 out of 1195 [2022-07-19 21:22:30,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1056 places, 974 transitions, 2118 flow. Second operand has 3 states, 3 states have (on average 946.0) internal successors, (2838), 3 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:30,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:30,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 945 of 1195 [2022-07-19 21:22:30,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:31,671 INFO L129 PetriNetUnfolder]: 0/1704 cut-off events. [2022-07-19 21:22:31,671 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-19 21:22:31,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2051 conditions, 1704 events. 0/1704 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6102 event pairs, 0 based on Foata normal form. 0/1670 useless extension candidates. Maximal degree in co-relation 0. Up to 204 conditions per place. [2022-07-19 21:22:31,675 INFO L132 encePairwiseOnDemand]: 1192/1195 looper letters, 43 selfloop transitions, 2 changer transitions 0/978 dead transitions. [2022-07-19 21:22:31,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1046 places, 978 transitions, 2216 flow [2022-07-19 21:22:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:22:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:22:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2881 transitions. [2022-07-19 21:22:31,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.803626220362622 [2022-07-19 21:22:31,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2881 transitions. [2022-07-19 21:22:31,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2881 transitions. [2022-07-19 21:22:31,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:31,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2881 transitions. [2022-07-19 21:22:31,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 960.3333333333334) internal successors, (2881), 3 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:31,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1195.0) internal successors, (4780), 4 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:31,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1195.0) internal successors, (4780), 4 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:31,681 INFO L186 Difference]: Start difference. First operand has 1056 places, 974 transitions, 2118 flow. Second operand 3 states and 2881 transitions. [2022-07-19 21:22:31,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1046 places, 978 transitions, 2216 flow [2022-07-19 21:22:31,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1046 places, 978 transitions, 2216 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:22:31,690 INFO L242 Difference]: Finished difference. Result has 1047 places, 975 transitions, 2130 flow [2022-07-19 21:22:31,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=1044, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2130, PETRI_PLACES=1047, PETRI_TRANSITIONS=975} [2022-07-19 21:22:31,690 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, -9 predicate places. [2022-07-19 21:22:31,690 INFO L495 AbstractCegarLoop]: Abstraction has has 1047 places, 975 transitions, 2130 flow [2022-07-19 21:22:31,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 946.0) internal successors, (2838), 3 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:31,691 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:31,691 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] [2022-07-19 21:22:31,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2022-07-19 21:22:31,691 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 842827840, now seen corresponding path program 1 times [2022-07-19 21:22:31,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:31,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787593063] [2022-07-19 21:22:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:31,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:31,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:31,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787593063] [2022-07-19 21:22:31,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787593063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:31,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728111695] [2022-07-19 21:22:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:31,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:31,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:31,723 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:31,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-07-19 21:22:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:32,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:22:32,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:32,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:32,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728111695] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:32,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:32,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:22:32,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689774385] [2022-07-19 21:22:32,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:32,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:22:32,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:32,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:22:32,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:22:32,803 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-07-19 21:22:32,806 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 975 transitions, 2130 flow. Second operand has 10 states, 10 states have (on average 946.3) internal successors, (9463), 10 states have internal predecessors, (9463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:32,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:32,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-07-19 21:22:32,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:33,749 INFO L129 PetriNetUnfolder]: 0/1678 cut-off events. [2022-07-19 21:22:33,750 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-19 21:22:33,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2127 conditions, 1678 events. 0/1678 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5945 event pairs, 0 based on Foata normal form. 2/1680 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2022-07-19 21:22:33,753 INFO L132 encePairwiseOnDemand]: 1189/1195 looper letters, 44 selfloop transitions, 9 changer transitions 0/985 dead transitions. [2022-07-19 21:22:33,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1055 places, 985 transitions, 2258 flow [2022-07-19 21:22:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:22:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:22:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8551 transitions. [2022-07-19 21:22:33,758 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7950720595072059 [2022-07-19 21:22:33,758 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8551 transitions. [2022-07-19 21:22:33,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8551 transitions. [2022-07-19 21:22:33,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:33,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8551 transitions. [2022-07-19 21:22:33,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 950.1111111111111) internal successors, (8551), 9 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:33,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1195.0) internal successors, (11950), 10 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:33,768 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1195.0) internal successors, (11950), 10 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:33,768 INFO L186 Difference]: Start difference. First operand has 1047 places, 975 transitions, 2130 flow. Second operand 9 states and 8551 transitions. [2022-07-19 21:22:33,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1055 places, 985 transitions, 2258 flow [2022-07-19 21:22:33,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1054 places, 985 transitions, 2256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:33,778 INFO L242 Difference]: Finished difference. Result has 1057 places, 981 transitions, 2178 flow [2022-07-19 21:22:33,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=1046, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=969, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2178, PETRI_PLACES=1057, PETRI_TRANSITIONS=981} [2022-07-19 21:22:33,779 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 1 predicate places. [2022-07-19 21:22:33,779 INFO L495 AbstractCegarLoop]: Abstraction has has 1057 places, 981 transitions, 2178 flow [2022-07-19 21:22:33,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 946.3) internal successors, (9463), 10 states have internal predecessors, (9463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:33,779 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:33,780 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] [2022-07-19 21:22:33,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:33,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-07-19 21:22:33,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:33,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1370980021, now seen corresponding path program 1 times [2022-07-19 21:22:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:33,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517994176] [2022-07-19 21:22:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:34,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:34,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517994176] [2022-07-19 21:22:34,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517994176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:34,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315457004] [2022-07-19 21:22:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:34,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:34,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:34,043 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:34,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-07-19 21:22:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:35,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:22:35,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:35,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:35,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315457004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:35,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:35,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:22:35,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686796172] [2022-07-19 21:22:35,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:35,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:22:35,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:35,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:22:35,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:22:35,143 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-07-19 21:22:35,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1057 places, 981 transitions, 2178 flow. Second operand has 18 states, 18 states have (on average 946.6111111111111) internal successors, (17039), 18 states have internal predecessors, (17039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:35,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:35,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-07-19 21:22:35,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:36,316 INFO L129 PetriNetUnfolder]: 0/1626 cut-off events. [2022-07-19 21:22:36,317 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-07-19 21:22:36,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2328 conditions, 1626 events. 0/1626 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5584 event pairs, 0 based on Foata normal form. 4/1630 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-07-19 21:22:36,319 INFO L132 encePairwiseOnDemand]: 1189/1195 looper letters, 52 selfloop transitions, 21 changer transitions 0/1005 dead transitions. [2022-07-19 21:22:36,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1077 places, 1005 transitions, 2432 flow [2022-07-19 21:22:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:22:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:22:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19901 transitions. [2022-07-19 21:22:36,328 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930264993026499 [2022-07-19 21:22:36,328 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19901 transitions. [2022-07-19 21:22:36,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19901 transitions. [2022-07-19 21:22:36,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:36,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19901 transitions. [2022-07-19 21:22:36,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 947.6666666666666) internal successors, (19901), 21 states have internal predecessors, (19901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:36,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1195.0) internal successors, (26290), 22 states have internal predecessors, (26290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:36,351 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1195.0) internal successors, (26290), 22 states have internal predecessors, (26290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:36,351 INFO L186 Difference]: Start difference. First operand has 1057 places, 981 transitions, 2178 flow. Second operand 21 states and 19901 transitions. [2022-07-19 21:22:36,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1077 places, 1005 transitions, 2432 flow [2022-07-19 21:22:36,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1076 places, 1005 transitions, 2418 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:36,361 INFO L242 Difference]: Finished difference. Result has 1081 places, 994 transitions, 2302 flow [2022-07-19 21:22:36,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=1056, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2302, PETRI_PLACES=1081, PETRI_TRANSITIONS=994} [2022-07-19 21:22:36,361 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 25 predicate places. [2022-07-19 21:22:36,361 INFO L495 AbstractCegarLoop]: Abstraction has has 1081 places, 994 transitions, 2302 flow [2022-07-19 21:22:36,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 946.6111111111111) internal successors, (17039), 18 states have internal predecessors, (17039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:36,363 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:36,363 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:36,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-07-19 21:22:36,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:36,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash -419266133, now seen corresponding path program 1 times [2022-07-19 21:22:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32781856] [2022-07-19 21:22:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:36,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:36,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:36,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32781856] [2022-07-19 21:22:36,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32781856] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:36,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182412063] [2022-07-19 21:22:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:36,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:36,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:36,708 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:36,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-07-19 21:22:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:37,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:22:37,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:37,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:38,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182412063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:38,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:38,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:22:38,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150565786] [2022-07-19 21:22:38,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:38,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:22:38,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:38,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:22:38,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:22:38,074 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-07-19 21:22:38,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1081 places, 994 transitions, 2302 flow. Second operand has 34 states, 34 states have (on average 946.7941176470588) internal successors, (32191), 34 states have internal predecessors, (32191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:38,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:38,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-07-19 21:22:38,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:39,502 INFO L129 PetriNetUnfolder]: 0/1522 cut-off events. [2022-07-19 21:22:39,503 INFO L130 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-07-19 21:22:39,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 1522 events. 0/1522 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4903 event pairs, 0 based on Foata normal form. 8/1530 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-19 21:22:39,506 INFO L132 encePairwiseOnDemand]: 1189/1195 looper letters, 68 selfloop transitions, 45 changer transitions 0/1045 dead transitions. [2022-07-19 21:22:39,506 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1125 places, 1045 transitions, 2844 flow [2022-07-19 21:22:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:22:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:22:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 42601 transitions. [2022-07-19 21:22:39,524 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922082752208275 [2022-07-19 21:22:39,524 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 42601 transitions. [2022-07-19 21:22:39,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 42601 transitions. [2022-07-19 21:22:39,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:39,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 42601 transitions. [2022-07-19 21:22:39,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 946.6888888888889) internal successors, (42601), 45 states have internal predecessors, (42601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:39,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1195.0) internal successors, (54970), 46 states have internal predecessors, (54970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:39,583 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1195.0) internal successors, (54970), 46 states have internal predecessors, (54970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:39,583 INFO L186 Difference]: Start difference. First operand has 1081 places, 994 transitions, 2302 flow. Second operand 45 states and 42601 transitions. [2022-07-19 21:22:39,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1125 places, 1045 transitions, 2844 flow [2022-07-19 21:22:39,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1119 places, 1045 transitions, 2804 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:22:39,596 INFO L242 Difference]: Finished difference. Result has 1128 places, 1019 transitions, 2580 flow [2022-07-19 21:22:39,597 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=1075, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=971, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2580, PETRI_PLACES=1128, PETRI_TRANSITIONS=1019} [2022-07-19 21:22:39,597 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 72 predicate places. [2022-07-19 21:22:39,597 INFO L495 AbstractCegarLoop]: Abstraction has has 1128 places, 1019 transitions, 2580 flow [2022-07-19 21:22:39,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 946.7941176470588) internal successors, (32191), 34 states have internal predecessors, (32191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:39,600 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:39,600 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:39,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:39,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:39,805 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:39,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:39,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1423751225, now seen corresponding path program 1 times [2022-07-19 21:22:39,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:39,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340967292] [2022-07-19 21:22:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:40,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:40,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340967292] [2022-07-19 21:22:40,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340967292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:40,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219258886] [2022-07-19 21:22:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:40,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:40,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:40,081 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:40,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-07-19 21:22:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:41,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:22:41,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:41,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:41,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219258886] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:41,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:41,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:22:41,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722053498] [2022-07-19 21:22:41,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:41,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:22:41,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:41,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:22:41,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:22:41,860 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-07-19 21:22:41,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1128 places, 1019 transitions, 2580 flow. Second operand has 66 states, 66 states have (on average 946.8939393939394) internal successors, (62495), 66 states have internal predecessors, (62495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:41,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:41,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-07-19 21:22:41,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:44,052 INFO L129 PetriNetUnfolder]: 0/1314 cut-off events. [2022-07-19 21:22:44,052 INFO L130 PetriNetUnfolder]: For 2587/2587 co-relation queries the response was YES. [2022-07-19 21:22:44,052 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2283 conditions, 1314 events. 0/1314 cut-off events. For 2587/2587 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3543 event pairs, 0 based on Foata normal form. 16/1330 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-07-19 21:22:44,054 INFO L132 encePairwiseOnDemand]: 1189/1195 looper letters, 100 selfloop transitions, 93 changer transitions 0/1125 dead transitions. [2022-07-19 21:22:44,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1220 places, 1125 transitions, 3814 flow [2022-07-19 21:22:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:22:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:22:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 88001 transitions. [2022-07-19 21:22:44,089 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918387546677464 [2022-07-19 21:22:44,089 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 88001 transitions. [2022-07-19 21:22:44,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 88001 transitions. [2022-07-19 21:22:44,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:44,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 88001 transitions. [2022-07-19 21:22:44,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 946.247311827957) internal successors, (88001), 93 states have internal predecessors, (88001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:44,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1195.0) internal successors, (112330), 94 states have internal predecessors, (112330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:44,221 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1195.0) internal successors, (112330), 94 states have internal predecessors, (112330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:44,221 INFO L186 Difference]: Start difference. First operand has 1128 places, 1019 transitions, 2580 flow. Second operand 93 states and 88001 transitions. [2022-07-19 21:22:44,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1220 places, 1125 transitions, 3814 flow [2022-07-19 21:22:44,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1202 places, 1125 transitions, 3726 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-19 21:22:44,237 INFO L242 Difference]: Finished difference. Result has 1219 places, 1068 transitions, 3214 flow [2022-07-19 21:22:44,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2524, PETRI_DIFFERENCE_MINUEND_PLACES=1110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3214, PETRI_PLACES=1219, PETRI_TRANSITIONS=1068} [2022-07-19 21:22:44,241 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 163 predicate places. [2022-07-19 21:22:44,241 INFO L495 AbstractCegarLoop]: Abstraction has has 1219 places, 1068 transitions, 3214 flow [2022-07-19 21:22:44,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 946.8939393939394) internal successors, (62495), 66 states have internal predecessors, (62495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:44,247 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:44,247 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:44,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:44,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2022-07-19 21:22:44,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash -498395969, now seen corresponding path program 1 times [2022-07-19 21:22:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:44,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130038634] [2022-07-19 21:22:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:44,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:45,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:45,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130038634] [2022-07-19 21:22:45,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130038634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:45,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117028289] [2022-07-19 21:22:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:45,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:45,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:45,166 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:45,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-07-19 21:22:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:46,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 21:22:46,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:46,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:48,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117028289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:48,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:48,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-19 21:22:48,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839399593] [2022-07-19 21:22:48,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:48,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-19 21:22:48,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-19 21:22:48,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-19 21:22:48,087 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-07-19 21:22:48,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1219 places, 1068 transitions, 3214 flow. Second operand has 130 states, 130 states have (on average 946.9461538461538) internal successors, (123103), 130 states have internal predecessors, (123103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:48,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:48,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-07-19 21:22:48,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:50,143 INFO L129 PetriNetUnfolder]: 0/1262 cut-off events. [2022-07-19 21:22:50,144 INFO L130 PetriNetUnfolder]: For 2686/2686 co-relation queries the response was YES. [2022-07-19 21:22:50,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 1262 events. 0/1262 cut-off events. For 2686/2686 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3227 event pairs, 0 based on Foata normal form. 4/1266 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-07-19 21:22:50,146 INFO L132 encePairwiseOnDemand]: 1190/1195 looper letters, 105 selfloop transitions, 103 changer transitions 0/1128 dead transitions. [2022-07-19 21:22:50,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1310 places, 1128 transitions, 4122 flow [2022-07-19 21:22:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-19 21:22:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-07-19 21:22:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 99332 transitions. [2022-07-19 21:22:50,183 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916477385933453 [2022-07-19 21:22:50,184 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 99332 transitions. [2022-07-19 21:22:50,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 99332 transitions. [2022-07-19 21:22:50,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:50,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 99332 transitions. [2022-07-19 21:22:50,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 946.0190476190476) internal successors, (99332), 105 states have internal predecessors, (99332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:50,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 1195.0) internal successors, (126670), 106 states have internal predecessors, (126670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:50,333 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 1195.0) internal successors, (126670), 106 states have internal predecessors, (126670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:50,334 INFO L186 Difference]: Start difference. First operand has 1219 places, 1068 transitions, 3214 flow. Second operand 105 states and 99332 transitions. [2022-07-19 21:22:50,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1310 places, 1128 transitions, 4122 flow [2022-07-19 21:22:50,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1237 places, 1128 transitions, 3770 flow, removed 21 selfloop flow, removed 73 redundant places. [2022-07-19 21:22:50,350 INFO L242 Difference]: Finished difference. Result has 1237 places, 1064 transitions, 3156 flow [2022-07-19 21:22:50,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=1133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=3156, PETRI_PLACES=1237, PETRI_TRANSITIONS=1064} [2022-07-19 21:22:50,351 INFO L279 CegarLoopForPetriNet]: 1056 programPoint places, 181 predicate places. [2022-07-19 21:22:50,351 INFO L495 AbstractCegarLoop]: Abstraction has has 1237 places, 1064 transitions, 3156 flow [2022-07-19 21:22:50,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 946.9461538461538) internal successors, (123103), 130 states have internal predecessors, (123103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:50,363 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:50,363 INFO L200 CegarLoopForPetriNet]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:50,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:50,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:50,586 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:50,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1964619998, now seen corresponding path program 1 times [2022-07-19 21:22:50,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:50,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862290135] [2022-07-19 21:22:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:50,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:50,632 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:22:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:50,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:22:50,708 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:22:50,708 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:22:50,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:22:50,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2022-07-19 21:22:50,708 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:50,709 WARN L231 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:22:50,709 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2022-07-19 21:22:50,755 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:22:50,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1085 places, 1228 transitions, 3821 flow [2022-07-19 21:22:52,003 INFO L129 PetriNetUnfolder]: 354/2588 cut-off events. [2022-07-19 21:22:52,003 INFO L130 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2022-07-19 21:22:52,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3324 conditions, 2588 events. 354/2588 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9842 event pairs, 0 based on Foata normal form. 0/2162 useless extension candidates. Maximal degree in co-relation 3186. Up to 72 conditions per place. [2022-07-19 21:22:52,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 1085 places, 1228 transitions, 3821 flow [2022-07-19 21:22:52,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1085 places, 1228 transitions, 3821 flow [2022-07-19 21:22:52,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:22:52,221 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@5083e0c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62b325c0 [2022-07-19 21:22:52,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:22:52,225 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-19 21:22:52,225 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:22:52,225 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:52,225 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:52,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -646579162, now seen corresponding path program 1 times [2022-07-19 21:22:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:52,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614558309] [2022-07-19 21:22:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:52,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:52,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:52,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614558309] [2022-07-19 21:22:52,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614558309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:52,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:52,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:22:52,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773121623] [2022-07-19 21:22:52,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:52,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:22:52,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:52,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:22:52,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:22:52,249 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 978 out of 1228 [2022-07-19 21:22:52,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1085 places, 1228 transitions, 3821 flow. Second operand has 2 states, 2 states have (on average 978.5) internal successors, (1957), 2 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:52,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:52,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 978 of 1228 [2022-07-19 21:22:52,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:53,334 INFO L129 PetriNetUnfolder]: 0/2198 cut-off events. [2022-07-19 21:22:53,335 INFO L130 PetriNetUnfolder]: For 8365/8365 co-relation queries the response was YES. [2022-07-19 21:22:53,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2970 conditions, 2198 events. 0/2198 cut-off events. For 8365/8365 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9490 event pairs, 0 based on Foata normal form. 3722/5848 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-19 21:22:53,339 INFO L132 encePairwiseOnDemand]: 1014/1228 looper letters, 35 selfloop transitions, 0 changer transitions 12/1013 dead transitions. [2022-07-19 21:22:53,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1085 places, 1013 transitions, 3461 flow [2022-07-19 21:22:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:22:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:22:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2205 transitions. [2022-07-19 21:22:53,341 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8978013029315961 [2022-07-19 21:22:53,341 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2205 transitions. [2022-07-19 21:22:53,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2205 transitions. [2022-07-19 21:22:53,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:53,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2205 transitions. [2022-07-19 21:22:53,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1102.5) internal successors, (2205), 2 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:53,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1228.0) internal successors, (3684), 3 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:53,344 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1228.0) internal successors, (3684), 3 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:53,344 INFO L186 Difference]: Start difference. First operand has 1085 places, 1228 transitions, 3821 flow. Second operand 2 states and 2205 transitions. [2022-07-19 21:22:53,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1085 places, 1013 transitions, 3461 flow [2022-07-19 21:22:53,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1085 places, 1013 transitions, 2271 flow, removed 595 selfloop flow, removed 0 redundant places. [2022-07-19 21:22:53,358 INFO L242 Difference]: Finished difference. Result has 1085 places, 1001 transitions, 2177 flow [2022-07-19 21:22:53,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=1084, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1013, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2177, PETRI_PLACES=1085, PETRI_TRANSITIONS=1001} [2022-07-19 21:22:53,359 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, 0 predicate places. [2022-07-19 21:22:53,359 INFO L495 AbstractCegarLoop]: Abstraction has has 1085 places, 1001 transitions, 2177 flow [2022-07-19 21:22:53,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 978.5) internal successors, (1957), 2 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:53,359 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:53,359 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:53,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2022-07-19 21:22:53,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:53,360 INFO L85 PathProgramCache]: Analyzing trace with hash -939982169, now seen corresponding path program 1 times [2022-07-19 21:22:53,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:53,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915545554] [2022-07-19 21:22:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:53,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:53,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:53,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915545554] [2022-07-19 21:22:53,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915545554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:53,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:53,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:22:53,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884493452] [2022-07-19 21:22:53,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:53,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:22:53,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:53,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:22:53,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:22:53,388 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 971 out of 1228 [2022-07-19 21:22:53,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1085 places, 1001 transitions, 2177 flow. Second operand has 3 states, 3 states have (on average 972.0) internal successors, (2916), 3 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:53,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:53,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 971 of 1228 [2022-07-19 21:22:53,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:54,286 INFO L129 PetriNetUnfolder]: 0/1753 cut-off events. [2022-07-19 21:22:54,286 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-19 21:22:54,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2110 conditions, 1753 events. 0/1753 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6283 event pairs, 0 based on Foata normal form. 0/1718 useless extension candidates. Maximal degree in co-relation 0. Up to 210 conditions per place. [2022-07-19 21:22:54,289 INFO L132 encePairwiseOnDemand]: 1225/1228 looper letters, 44 selfloop transitions, 2 changer transitions 0/1005 dead transitions. [2022-07-19 21:22:54,289 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1075 places, 1005 transitions, 2277 flow [2022-07-19 21:22:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:22:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:22:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2960 transitions. [2022-07-19 21:22:54,291 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8034744842562432 [2022-07-19 21:22:54,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2960 transitions. [2022-07-19 21:22:54,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2960 transitions. [2022-07-19 21:22:54,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:54,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2960 transitions. [2022-07-19 21:22:54,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 986.6666666666666) internal successors, (2960), 3 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:54,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1228.0) internal successors, (4912), 4 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:54,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1228.0) internal successors, (4912), 4 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:54,295 INFO L186 Difference]: Start difference. First operand has 1085 places, 1001 transitions, 2177 flow. Second operand 3 states and 2960 transitions. [2022-07-19 21:22:54,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1075 places, 1005 transitions, 2277 flow [2022-07-19 21:22:54,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1075 places, 1005 transitions, 2277 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:22:54,304 INFO L242 Difference]: Finished difference. Result has 1076 places, 1002 transitions, 2189 flow [2022-07-19 21:22:54,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=1073, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2189, PETRI_PLACES=1076, PETRI_TRANSITIONS=1002} [2022-07-19 21:22:54,304 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, -9 predicate places. [2022-07-19 21:22:54,304 INFO L495 AbstractCegarLoop]: Abstraction has has 1076 places, 1002 transitions, 2189 flow [2022-07-19 21:22:54,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 972.0) internal successors, (2916), 3 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:54,305 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:54,305 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] [2022-07-19 21:22:54,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2022-07-19 21:22:54,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:54,305 INFO L85 PathProgramCache]: Analyzing trace with hash -659830176, now seen corresponding path program 1 times [2022-07-19 21:22:54,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:54,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120105949] [2022-07-19 21:22:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:54,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:54,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:54,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120105949] [2022-07-19 21:22:54,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120105949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:54,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710916742] [2022-07-19 21:22:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:54,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:54,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:54,336 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:54,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-07-19 21:22:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:55,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:22:55,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:55,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:55,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710916742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:55,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:55,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:22:55,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899048607] [2022-07-19 21:22:55,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:55,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:22:55,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:55,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:22:55,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:22:55,380 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-07-19 21:22:55,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1076 places, 1002 transitions, 2189 flow. Second operand has 10 states, 10 states have (on average 972.3) internal successors, (9723), 10 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:55,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:55,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-07-19 21:22:55,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:56,413 INFO L129 PetriNetUnfolder]: 0/1727 cut-off events. [2022-07-19 21:22:56,414 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-07-19 21:22:56,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2189 conditions, 1727 events. 0/1727 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6126 event pairs, 0 based on Foata normal form. 2/1729 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2022-07-19 21:22:56,418 INFO L132 encePairwiseOnDemand]: 1222/1228 looper letters, 45 selfloop transitions, 9 changer transitions 0/1012 dead transitions. [2022-07-19 21:22:56,418 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1084 places, 1012 transitions, 2319 flow [2022-07-19 21:22:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:22:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:22:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8786 transitions. [2022-07-19 21:22:56,424 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7949692363373145 [2022-07-19 21:22:56,424 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8786 transitions. [2022-07-19 21:22:56,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8786 transitions. [2022-07-19 21:22:56,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:56,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8786 transitions. [2022-07-19 21:22:56,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 976.2222222222222) internal successors, (8786), 9 states have internal predecessors, (8786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:56,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1228.0) internal successors, (12280), 10 states have internal predecessors, (12280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:56,438 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1228.0) internal successors, (12280), 10 states have internal predecessors, (12280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:56,438 INFO L186 Difference]: Start difference. First operand has 1076 places, 1002 transitions, 2189 flow. Second operand 9 states and 8786 transitions. [2022-07-19 21:22:56,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1084 places, 1012 transitions, 2319 flow [2022-07-19 21:22:56,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1083 places, 1012 transitions, 2317 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:56,452 INFO L242 Difference]: Finished difference. Result has 1086 places, 1008 transitions, 2237 flow [2022-07-19 21:22:56,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=1075, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=996, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2237, PETRI_PLACES=1086, PETRI_TRANSITIONS=1008} [2022-07-19 21:22:56,452 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, 1 predicate places. [2022-07-19 21:22:56,452 INFO L495 AbstractCegarLoop]: Abstraction has has 1086 places, 1008 transitions, 2237 flow [2022-07-19 21:22:56,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 972.3) internal successors, (9723), 10 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:56,454 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:56,454 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] [2022-07-19 21:22:56,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-07-19 21:22:56,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:56,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:56,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:56,669 INFO L85 PathProgramCache]: Analyzing trace with hash 483285013, now seen corresponding path program 1 times [2022-07-19 21:22:56,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:56,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330375724] [2022-07-19 21:22:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:56,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:56,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330375724] [2022-07-19 21:22:56,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330375724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769222186] [2022-07-19 21:22:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:56,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:56,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:56,717 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:56,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-07-19 21:22:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:57,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:22:57,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:57,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:57,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769222186] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:57,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:57,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:22:57,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981345013] [2022-07-19 21:22:57,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:57,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:22:57,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:22:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:22:57,844 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-07-19 21:22:57,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1086 places, 1008 transitions, 2237 flow. Second operand has 18 states, 18 states have (on average 972.6111111111111) internal successors, (17507), 18 states have internal predecessors, (17507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:57,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:57,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-07-19 21:22:57,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:58,948 INFO L129 PetriNetUnfolder]: 0/1675 cut-off events. [2022-07-19 21:22:58,948 INFO L130 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-07-19 21:22:58,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2398 conditions, 1675 events. 0/1675 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5778 event pairs, 0 based on Foata normal form. 4/1679 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-07-19 21:22:58,952 INFO L132 encePairwiseOnDemand]: 1222/1228 looper letters, 53 selfloop transitions, 21 changer transitions 0/1032 dead transitions. [2022-07-19 21:22:58,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1106 places, 1032 transitions, 2493 flow [2022-07-19 21:22:58,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:22:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:22:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20448 transitions. [2022-07-19 21:22:58,960 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7929269427640763 [2022-07-19 21:22:58,960 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20448 transitions. [2022-07-19 21:22:58,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20448 transitions. [2022-07-19 21:22:58,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:58,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20448 transitions. [2022-07-19 21:22:58,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 973.7142857142857) internal successors, (20448), 21 states have internal predecessors, (20448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:58,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1228.0) internal successors, (27016), 22 states have internal predecessors, (27016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:58,985 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1228.0) internal successors, (27016), 22 states have internal predecessors, (27016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:58,985 INFO L186 Difference]: Start difference. First operand has 1086 places, 1008 transitions, 2237 flow. Second operand 21 states and 20448 transitions. [2022-07-19 21:22:58,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1106 places, 1032 transitions, 2493 flow [2022-07-19 21:22:58,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1105 places, 1032 transitions, 2479 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:58,996 INFO L242 Difference]: Finished difference. Result has 1110 places, 1021 transitions, 2361 flow [2022-07-19 21:22:58,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=1085, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2361, PETRI_PLACES=1110, PETRI_TRANSITIONS=1021} [2022-07-19 21:22:58,996 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, 25 predicate places. [2022-07-19 21:22:58,997 INFO L495 AbstractCegarLoop]: Abstraction has has 1110 places, 1021 transitions, 2361 flow [2022-07-19 21:22:58,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 972.6111111111111) internal successors, (17507), 18 states have internal predecessors, (17507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:58,998 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:58,998 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:59,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-07-19 21:22:59,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-07-19 21:22:59,202 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:59,202 INFO L85 PathProgramCache]: Analyzing trace with hash 794569099, now seen corresponding path program 1 times [2022-07-19 21:22:59,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:59,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601049515] [2022-07-19 21:22:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:59,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:59,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:59,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601049515] [2022-07-19 21:22:59,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601049515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:59,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46298001] [2022-07-19 21:22:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:59,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:59,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:59,315 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:59,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-07-19 21:23:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:00,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:23:00,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:23:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:00,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:23:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:00,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46298001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:23:00,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:23:00,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:23:00,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278468652] [2022-07-19 21:23:00,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:23:00,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:23:00,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:23:00,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:23:00,696 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-07-19 21:23:00,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1110 places, 1021 transitions, 2361 flow. Second operand has 34 states, 34 states have (on average 972.7941176470588) internal successors, (33075), 34 states have internal predecessors, (33075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:00,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:00,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-07-19 21:23:00,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:02,130 INFO L129 PetriNetUnfolder]: 0/1571 cut-off events. [2022-07-19 21:23:02,130 INFO L130 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2022-07-19 21:23:02,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 1571 events. 0/1571 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5086 event pairs, 0 based on Foata normal form. 8/1579 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-19 21:23:02,132 INFO L132 encePairwiseOnDemand]: 1222/1228 looper letters, 69 selfloop transitions, 45 changer transitions 0/1072 dead transitions. [2022-07-19 21:23:02,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1154 places, 1072 transitions, 2905 flow [2022-07-19 21:23:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:23:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:23:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 43772 transitions. [2022-07-19 21:23:02,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.792110025334781 [2022-07-19 21:23:02,150 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 43772 transitions. [2022-07-19 21:23:02,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 43772 transitions. [2022-07-19 21:23:02,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:02,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 43772 transitions. [2022-07-19 21:23:02,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 972.7111111111111) internal successors, (43772), 45 states have internal predecessors, (43772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:02,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1228.0) internal successors, (56488), 46 states have internal predecessors, (56488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:02,217 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1228.0) internal successors, (56488), 46 states have internal predecessors, (56488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:02,217 INFO L186 Difference]: Start difference. First operand has 1110 places, 1021 transitions, 2361 flow. Second operand 45 states and 43772 transitions. [2022-07-19 21:23:02,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1154 places, 1072 transitions, 2905 flow [2022-07-19 21:23:02,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1148 places, 1072 transitions, 2865 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:23:02,230 INFO L242 Difference]: Finished difference. Result has 1157 places, 1046 transitions, 2639 flow [2022-07-19 21:23:02,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=998, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2639, PETRI_PLACES=1157, PETRI_TRANSITIONS=1046} [2022-07-19 21:23:02,230 INFO L279 CegarLoopForPetriNet]: 1085 programPoint places, 72 predicate places. [2022-07-19 21:23:02,231 INFO L495 AbstractCegarLoop]: Abstraction has has 1157 places, 1046 transitions, 2639 flow [2022-07-19 21:23:02,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 972.7941176470588) internal successors, (33075), 34 states have internal predecessors, (33075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:02,234 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:02,234 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:23:02,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-07-19 21:23:02,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-07-19 21:23:02,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:23:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:02,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1116802215, now seen corresponding path program 1 times [2022-07-19 21:23:02,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:02,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398070548] [2022-07-19 21:23:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:02,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:02,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398070548] [2022-07-19 21:23:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398070548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:23:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099232655] [2022-07-19 21:23:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:02,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:23:02,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:23:02,718 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:23:02,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-07-19 21:23:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:23:03,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:23:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:03,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:23:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:04,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099232655] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:23:04,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:23:04,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:23:04,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481343365] [2022-07-19 21:23:04,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:23:04,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:23:04,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:04,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:23:04,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:23:04,705 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-07-19 21:23:04,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1157 places, 1046 transitions, 2639 flow. Second operand has 66 states, 66 states have (on average 972.8939393939394) internal successors, (64211), 66 states have internal predecessors, (64211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:04,723 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:04,723 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-07-19 21:23:04,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:06,847 INFO L129 PetriNetUnfolder]: 0/1363 cut-off events. [2022-07-19 21:23:06,847 INFO L130 PetriNetUnfolder]: For 2708/2708 co-relation queries the response was YES. [2022-07-19 21:23:06,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1363 events. 0/1363 cut-off events. For 2708/2708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3723 event pairs, 0 based on Foata normal form. 16/1379 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-07-19 21:23:06,850 INFO L132 encePairwiseOnDemand]: 1222/1228 looper letters, 101 selfloop transitions, 93 changer transitions 0/1152 dead transitions. [2022-07-19 21:23:06,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1249 places, 1152 transitions, 3875 flow [2022-07-19 21:23:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:23:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:23:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 90420 transitions. [2022-07-19 21:23:06,888 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7917410948828413 [2022-07-19 21:23:06,889 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 90420 transitions. [2022-07-19 21:23:06,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 90420 transitions. [2022-07-19 21:23:06,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:06,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 90420 transitions.