./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.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 22ccde2ce516925ebfe813d783d47f1167b5115e5910734aa9e1bf526ce8c733 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:38:16,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:38:16,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:38:16,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:38:16,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:38:16,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:38:16,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:38:16,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:38:16,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:38:16,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:38:16,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:38:16,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:38:16,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:38:16,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:38:16,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:38:16,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:38:16,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:38:16,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:38:16,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:38:16,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:38:16,229 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:38:16,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:38:16,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:38:16,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:38:16,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:38:16,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:38:16,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:38:16,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:38:16,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:38:16,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:38:16,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:38:16,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:38:16,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:38:16,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:38:16,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:38:16,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:38:16,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:38:16,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:38:16,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:38:16,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:38:16,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:38:16,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:38:16,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:38:16,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:38:16,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:38:16,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:38:16,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:38:16,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:38:16,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:38:16,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:38:16,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:38:16,304 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:38:16,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:38:16,305 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:38:16,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:38:16,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:38:16,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:38:16,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:38:16,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:38:16,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:38:16,307 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:38:16,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:38:16,307 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:38:16,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:38:16,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:38:16,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:38:16,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:38:16,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:38:16,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:38:16,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:38:16,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:38:16,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:38:16,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:38:16,310 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:38:16,310 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:38:16,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:38:16,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22ccde2ce516925ebfe813d783d47f1167b5115e5910734aa9e1bf526ce8c733 [2022-07-21 08:38:16,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:38:16,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:38:16,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:38:16,660 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:38:16,661 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:38:16,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i [2022-07-21 08:38:16,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7250c5652/c55e20d1008144e089793e4d58d5c193/FLAG48b81efce [2022-07-21 08:38:17,271 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:38:17,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i [2022-07-21 08:38:17,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7250c5652/c55e20d1008144e089793e4d58d5c193/FLAG48b81efce [2022-07-21 08:38:17,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7250c5652/c55e20d1008144e089793e4d58d5c193 [2022-07-21 08:38:17,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:38:17,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:38:17,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:38:17,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:38:17,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:38:17,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:38:17" (1/1) ... [2022-07-21 08:38:17,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7ea012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:17, skipping insertion in model container [2022-07-21 08:38:17,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:38:17" (1/1) ... [2022-07-21 08:38:17,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:38:17,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:38:17,954 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i[30336,30349] [2022-07-21 08:38:17,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:38:17,976 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:38:18,018 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/47_ticket_lock_hc_backoff_vs.i[30336,30349] [2022-07-21 08:38:18,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:38:18,065 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:38:18,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18 WrapperNode [2022-07-21 08:38:18,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:38:18,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:38:18,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:38:18,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:38:18,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (1/1) ... [2022-07-21 08:38:18,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (1/1) ... [2022-07-21 08:38:18,135 INFO L137 Inliner]: procedures = 169, calls = 18, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2022-07-21 08:38:18,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:38:18,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:38:18,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:38:18,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:38:18,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (1/1) ... [2022-07-21 08:38:18,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (1/1) ... [2022-07-21 08:38:18,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (1/1) ... [2022-07-21 08:38:18,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (1/1) ... [2022-07-21 08:38:18,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (1/1) ... [2022-07-21 08:38:18,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (1/1) ... [2022-07-21 08:38:18,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (1/1) ... [2022-07-21 08:38:18,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:38:18,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:38:18,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:38:18,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:38:18,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (1/1) ... [2022-07-21 08:38:18,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:38:18,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:38:18,225 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) [2022-07-21 08:38:18,254 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 [2022-07-21 08:38:18,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:38:18,278 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-21 08:38:18,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-21 08:38:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:38:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:38:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:38:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:38:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:38:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:38:18,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:38:18,281 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:38:18,430 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:38:18,439 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:38:18,663 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:38:18,696 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:38:18,696 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-21 08:38:18,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:38:18 BoogieIcfgContainer [2022-07-21 08:38:18,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:38:18,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:38:18,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:38:18,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:38:18,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:38:17" (1/3) ... [2022-07-21 08:38:18,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ca9c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:38:18, skipping insertion in model container [2022-07-21 08:38:18,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:38:18" (2/3) ... [2022-07-21 08:38:18,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ca9c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:38:18, skipping insertion in model container [2022-07-21 08:38:18,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:38:18" (3/3) ... [2022-07-21 08:38:18,709 INFO L111 eAbstractionObserver]: Analyzing ICFG 47_ticket_lock_hc_backoff_vs.i [2022-07-21 08:38:18,715 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:38:18,723 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:38:18,723 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 08:38:18,723 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:38:18,789 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:38:18,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 97 transitions, 199 flow [2022-07-21 08:38:18,910 INFO L129 PetriNetUnfolder]: 20/146 cut-off events. [2022-07-21 08:38:18,911 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:38:18,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 146 events. 20/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 420 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2022-07-21 08:38:18,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 97 transitions, 199 flow [2022-07-21 08:38:18,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 97 transitions, 199 flow [2022-07-21 08:38:18,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:38:18,950 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@20a71aa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@34a3a461 [2022-07-21 08:38:18,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:38:18,972 INFO L129 PetriNetUnfolder]: 8/73 cut-off events. [2022-07-21 08:38:18,972 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:38:18,972 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:18,973 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] [2022-07-21 08:38:18,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:38:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:18,980 INFO L85 PathProgramCache]: Analyzing trace with hash 253472294, now seen corresponding path program 1 times [2022-07-21 08:38:18,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:18,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318992352] [2022-07-21 08:38:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:18,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:38:19,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:19,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318992352] [2022-07-21 08:38:19,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318992352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:19,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:19,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:38:19,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179452379] [2022-07-21 08:38:19,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:19,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:38:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:38:19,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:38:19,217 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 97 [2022-07-21 08:38:19,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 199 flow. Second operand has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:19,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 97 [2022-07-21 08:38:19,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:38:19,279 INFO L129 PetriNetUnfolder]: 9/125 cut-off events. [2022-07-21 08:38:19,280 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:38:19,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 9/125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 238 event pairs, 1 based on Foata normal form. 17/131 useless extension candidates. Maximal degree in co-relation 80. Up to 8 conditions per place. [2022-07-21 08:38:19,282 INFO L132 encePairwiseOnDemand]: 86/97 looper letters, 3 selfloop transitions, 0 changer transitions 0/72 dead transitions. [2022-07-21 08:38:19,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 72 transitions, 155 flow [2022-07-21 08:38:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:38:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:38:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 176 transitions. [2022-07-21 08:38:19,296 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9072164948453608 [2022-07-21 08:38:19,296 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 176 transitions. [2022-07-21 08:38:19,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 176 transitions. [2022-07-21 08:38:19,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:38:19,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 176 transitions. [2022-07-21 08:38:19,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 88.0) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,309 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,310 INFO L186 Difference]: Start difference. First operand has 87 places, 97 transitions, 199 flow. Second operand 2 states and 176 transitions. [2022-07-21 08:38:19,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 72 transitions, 155 flow [2022-07-21 08:38:19,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 155 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:38:19,315 INFO L242 Difference]: Finished difference. Result has 72 places, 72 transitions, 149 flow [2022-07-21 08:38:19,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=149, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2022-07-21 08:38:19,320 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, -15 predicate places. [2022-07-21 08:38:19,321 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 149 flow [2022-07-21 08:38:19,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,321 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:19,322 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:38:19,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:38:19,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:38:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash -736232700, now seen corresponding path program 1 times [2022-07-21 08:38:19,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:19,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994370897] [2022-07-21 08:38:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:19,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:38:19,349 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:38:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:38:19,384 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:38:19,384 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:38:19,386 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 08:38:19,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 08:38:19,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-21 08:38:19,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 08:38:19,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:38:19,389 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:38:19,391 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:38:19,392 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:38:19,414 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:38:19,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 112 places, 126 transitions, 264 flow [2022-07-21 08:38:19,472 INFO L129 PetriNetUnfolder]: 33/226 cut-off events. [2022-07-21 08:38:19,472 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:38:19,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 226 events. 33/226 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 763 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 147. Up to 9 conditions per place. [2022-07-21 08:38:19,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 126 transitions, 264 flow [2022-07-21 08:38:19,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 126 transitions, 264 flow [2022-07-21 08:38:19,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:38:19,481 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@20a71aa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@34a3a461 [2022-07-21 08:38:19,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:38:19,487 INFO L129 PetriNetUnfolder]: 9/80 cut-off events. [2022-07-21 08:38:19,487 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:38:19,488 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:19,488 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] [2022-07-21 08:38:19,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:38:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:19,489 INFO L85 PathProgramCache]: Analyzing trace with hash -557963645, now seen corresponding path program 1 times [2022-07-21 08:38:19,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:19,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360942818] [2022-07-21 08:38:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:38:19,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:19,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360942818] [2022-07-21 08:38:19,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360942818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:19,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:19,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:38:19,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610752702] [2022-07-21 08:38:19,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:19,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:38:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:38:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:38:19,523 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 126 [2022-07-21 08:38:19,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 126 transitions, 264 flow. Second operand has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,524 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:19,524 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 126 [2022-07-21 08:38:19,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:38:19,565 INFO L129 PetriNetUnfolder]: 30/287 cut-off events. [2022-07-21 08:38:19,565 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 08:38:19,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 287 events. 30/287 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1065 event pairs, 7 based on Foata normal form. 55/311 useless extension candidates. Maximal degree in co-relation 181. Up to 28 conditions per place. [2022-07-21 08:38:19,568 INFO L132 encePairwiseOnDemand]: 110/126 looper letters, 5 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2022-07-21 08:38:19,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 208 flow [2022-07-21 08:38:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:38:19,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:38:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 225 transitions. [2022-07-21 08:38:19,571 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2022-07-21 08:38:19,571 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 225 transitions. [2022-07-21 08:38:19,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 225 transitions. [2022-07-21 08:38:19,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:38:19,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 225 transitions. [2022-07-21 08:38:19,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,576 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,577 INFO L186 Difference]: Start difference. First operand has 112 places, 126 transitions, 264 flow. Second operand 2 states and 225 transitions. [2022-07-21 08:38:19,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 208 flow [2022-07-21 08:38:19,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 206 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 08:38:19,579 INFO L242 Difference]: Finished difference. Result has 93 places, 93 transitions, 196 flow [2022-07-21 08:38:19,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2022-07-21 08:38:19,581 INFO L279 CegarLoopForPetriNet]: 112 programPoint places, -19 predicate places. [2022-07-21 08:38:19,581 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 196 flow [2022-07-21 08:38:19,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,581 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:19,581 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] [2022-07-21 08:38:19,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:38:19,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:38:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:19,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1515883692, now seen corresponding path program 1 times [2022-07-21 08:38:19,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:19,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538034540] [2022-07-21 08:38:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:19,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:38:19,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:19,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538034540] [2022-07-21 08:38:19,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538034540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:19,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:19,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:38:19,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113093621] [2022-07-21 08:38:19,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:19,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:38:19,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:38:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:38:19,673 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 126 [2022-07-21 08:38:19,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 93 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:19,677 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:19,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 126 [2022-07-21 08:38:19,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:38:19,971 INFO L129 PetriNetUnfolder]: 612/1777 cut-off events. [2022-07-21 08:38:19,971 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:38:19,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2702 conditions, 1777 events. 612/1777 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 12365 event pairs, 153 based on Foata normal form. 0/1559 useless extension candidates. Maximal degree in co-relation 2697. Up to 487 conditions per place. [2022-07-21 08:38:19,990 INFO L132 encePairwiseOnDemand]: 117/126 looper letters, 25 selfloop transitions, 6 changer transitions 0/106 dead transitions. [2022-07-21 08:38:19,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 106 transitions, 289 flow [2022-07-21 08:38:19,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:38:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:38:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2022-07-21 08:38:19,998 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7962962962962963 [2022-07-21 08:38:19,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2022-07-21 08:38:19,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2022-07-21 08:38:20,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:38:20,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2022-07-21 08:38:20,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:20,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:20,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:20,006 INFO L186 Difference]: Start difference. First operand has 93 places, 93 transitions, 196 flow. Second operand 3 states and 301 transitions. [2022-07-21 08:38:20,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 106 transitions, 289 flow [2022-07-21 08:38:20,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 106 transitions, 289 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:38:20,014 INFO L242 Difference]: Finished difference. Result has 97 places, 99 transitions, 250 flow [2022-07-21 08:38:20,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2022-07-21 08:38:20,017 INFO L279 CegarLoopForPetriNet]: 112 programPoint places, -15 predicate places. [2022-07-21 08:38:20,017 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 250 flow [2022-07-21 08:38:20,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:20,018 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:20,018 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:38:20,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:38:20,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:38:20,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:20,019 INFO L85 PathProgramCache]: Analyzing trace with hash -301670157, now seen corresponding path program 1 times [2022-07-21 08:38:20,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:20,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176083873] [2022-07-21 08:38:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:20,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:38:20,077 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:38:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:38:20,105 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:38:20,109 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:38:20,110 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:38:20,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:38:20,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-21 08:38:20,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:38:20,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:38:20,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:38:20,117 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:38:20,118 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:38:20,118 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:38:20,155 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:38:20,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 137 places, 155 transitions, 331 flow [2022-07-21 08:38:20,211 INFO L129 PetriNetUnfolder]: 46/306 cut-off events. [2022-07-21 08:38:20,212 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:38:20,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 46/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1108 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 230. Up to 12 conditions per place. [2022-07-21 08:38:20,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 155 transitions, 331 flow [2022-07-21 08:38:20,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 155 transitions, 331 flow [2022-07-21 08:38:20,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:38:20,231 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@20a71aa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@34a3a461 [2022-07-21 08:38:20,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:38:20,240 INFO L129 PetriNetUnfolder]: 9/76 cut-off events. [2022-07-21 08:38:20,240 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:38:20,240 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:20,241 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] [2022-07-21 08:38:20,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 08:38:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:20,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1647986654, now seen corresponding path program 1 times [2022-07-21 08:38:20,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:20,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891918480] [2022-07-21 08:38:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:20,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:38:20,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:20,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891918480] [2022-07-21 08:38:20,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891918480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:20,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:20,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:38:20,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711699605] [2022-07-21 08:38:20,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:20,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:38:20,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:20,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:38:20,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:38:20,296 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 155 [2022-07-21 08:38:20,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 155 transitions, 331 flow. Second operand has 2 states, 2 states have (on average 124.5) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:20,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:20,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 155 [2022-07-21 08:38:20,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:38:20,403 INFO L129 PetriNetUnfolder]: 87/629 cut-off events. [2022-07-21 08:38:20,404 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-21 08:38:20,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 629 events. 87/629 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3435 event pairs, 27 based on Foata normal form. 155/707 useless extension candidates. Maximal degree in co-relation 396. Up to 84 conditions per place. [2022-07-21 08:38:20,413 INFO L132 encePairwiseOnDemand]: 134/155 looper letters, 7 selfloop transitions, 0 changer transitions 0/114 dead transitions. [2022-07-21 08:38:20,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 114 transitions, 263 flow [2022-07-21 08:38:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:38:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:38:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 274 transitions. [2022-07-21 08:38:20,415 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8838709677419355 [2022-07-21 08:38:20,415 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 274 transitions. [2022-07-21 08:38:20,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 274 transitions. [2022-07-21 08:38:20,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:38:20,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 274 transitions. [2022-07-21 08:38:20,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 137.0) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:20,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:20,418 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:20,418 INFO L186 Difference]: Start difference. First operand has 137 places, 155 transitions, 331 flow. Second operand 2 states and 274 transitions. [2022-07-21 08:38:20,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 114 transitions, 263 flow [2022-07-21 08:38:20,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 114 transitions, 257 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-21 08:38:20,422 INFO L242 Difference]: Finished difference. Result has 114 places, 114 transitions, 243 flow [2022-07-21 08:38:20,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=243, PETRI_PLACES=114, PETRI_TRANSITIONS=114} [2022-07-21 08:38:20,424 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, -23 predicate places. [2022-07-21 08:38:20,425 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 114 transitions, 243 flow [2022-07-21 08:38:20,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 124.5) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:20,425 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:20,425 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] [2022-07-21 08:38:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:38:20,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 08:38:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash -475005772, now seen corresponding path program 1 times [2022-07-21 08:38:20,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:20,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97980995] [2022-07-21 08:38:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:20,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:38:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:20,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97980995] [2022-07-21 08:38:20,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97980995] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:20,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:20,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:38:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483658331] [2022-07-21 08:38:20,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:20,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:38:20,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:20,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:38:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:38:20,522 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 155 [2022-07-21 08:38:20,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 114 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:20,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:20,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 155 [2022-07-21 08:38:20,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:38:22,136 INFO L129 PetriNetUnfolder]: 6306/13378 cut-off events. [2022-07-21 08:38:22,137 INFO L130 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2022-07-21 08:38:22,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21954 conditions, 13378 events. 6306/13378 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 121658 event pairs, 1792 based on Foata normal form. 0/11584 useless extension candidates. Maximal degree in co-relation 21948. Up to 4564 conditions per place. [2022-07-21 08:38:22,303 INFO L132 encePairwiseOnDemand]: 143/155 looper letters, 34 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2022-07-21 08:38:22,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 132 transitions, 373 flow [2022-07-21 08:38:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:38:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:38:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2022-07-21 08:38:22,306 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7827956989247312 [2022-07-21 08:38:22,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2022-07-21 08:38:22,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2022-07-21 08:38:22,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:38:22,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2022-07-21 08:38:22,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,310 INFO L186 Difference]: Start difference. First operand has 114 places, 114 transitions, 243 flow. Second operand 3 states and 364 transitions. [2022-07-21 08:38:22,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 132 transitions, 373 flow [2022-07-21 08:38:22,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 132 transitions, 373 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:38:22,314 INFO L242 Difference]: Finished difference. Result has 118 places, 122 transitions, 315 flow [2022-07-21 08:38:22,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2022-07-21 08:38:22,315 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, -19 predicate places. [2022-07-21 08:38:22,315 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 315 flow [2022-07-21 08:38:22,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,316 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:22,316 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:38:22,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:38:22,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 08:38:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:22,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1832531939, now seen corresponding path program 1 times [2022-07-21 08:38:22,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:22,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502440530] [2022-07-21 08:38:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:22,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:38:22,336 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:38:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:38:22,389 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:38:22,390 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:38:22,390 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-21 08:38:22,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-21 08:38:22,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-21 08:38:22,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-21 08:38:22,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-21 08:38:22,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-21 08:38:22,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:38:22,392 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:38:22,392 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:38:22,392 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:38:22,418 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:38:22,420 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 162 places, 184 transitions, 400 flow [2022-07-21 08:38:22,456 INFO L129 PetriNetUnfolder]: 59/386 cut-off events. [2022-07-21 08:38:22,456 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:38:22,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 386 events. 59/386 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1460 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 314. Up to 15 conditions per place. [2022-07-21 08:38:22,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 184 transitions, 400 flow [2022-07-21 08:38:22,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 184 transitions, 400 flow [2022-07-21 08:38:22,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:38:22,466 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@20a71aa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@34a3a461 [2022-07-21 08:38:22,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:38:22,470 INFO L129 PetriNetUnfolder]: 9/77 cut-off events. [2022-07-21 08:38:22,470 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:38:22,470 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:22,471 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:38:22,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:38:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1718611401, now seen corresponding path program 1 times [2022-07-21 08:38:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073957633] [2022-07-21 08:38:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:38:22,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:22,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073957633] [2022-07-21 08:38:22,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073957633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:22,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:22,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:38:22,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479627694] [2022-07-21 08:38:22,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:22,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:38:22,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:38:22,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:38:22,491 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 184 [2022-07-21 08:38:22,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 184 transitions, 400 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:22,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 184 [2022-07-21 08:38:22,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:38:22,682 INFO L129 PetriNetUnfolder]: 232/1347 cut-off events. [2022-07-21 08:38:22,683 INFO L130 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2022-07-21 08:38:22,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 1347 events. 232/1347 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9475 event pairs, 83 based on Foata normal form. 405/1572 useless extension candidates. Maximal degree in co-relation 855. Up to 228 conditions per place. [2022-07-21 08:38:22,703 INFO L132 encePairwiseOnDemand]: 158/184 looper letters, 9 selfloop transitions, 0 changer transitions 0/135 dead transitions. [2022-07-21 08:38:22,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 135 transitions, 320 flow [2022-07-21 08:38:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:38:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:38:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 323 transitions. [2022-07-21 08:38:22,705 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8777173913043478 [2022-07-21 08:38:22,706 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 323 transitions. [2022-07-21 08:38:22,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 323 transitions. [2022-07-21 08:38:22,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:38:22,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 323 transitions. [2022-07-21 08:38:22,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 161.5) internal successors, (323), 2 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,709 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,709 INFO L186 Difference]: Start difference. First operand has 162 places, 184 transitions, 400 flow. Second operand 2 states and 323 transitions. [2022-07-21 08:38:22,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 135 transitions, 320 flow [2022-07-21 08:38:22,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 135 transitions, 308 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 08:38:22,712 INFO L242 Difference]: Finished difference. Result has 135 places, 135 transitions, 290 flow [2022-07-21 08:38:22,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=290, PETRI_PLACES=135, PETRI_TRANSITIONS=135} [2022-07-21 08:38:22,714 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -27 predicate places. [2022-07-21 08:38:22,714 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 135 transitions, 290 flow [2022-07-21 08:38:22,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,715 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:22,715 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] [2022-07-21 08:38:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:38:22,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:38:22,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1181448562, now seen corresponding path program 1 times [2022-07-21 08:38:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:22,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977380813] [2022-07-21 08:38:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:38:22,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:22,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977380813] [2022-07-21 08:38:22,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977380813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:22,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:22,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:38:22,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083015020] [2022-07-21 08:38:22,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:22,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:38:22,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:22,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:38:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:38:22,757 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 184 [2022-07-21 08:38:22,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 135 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:22,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 184 [2022-07-21 08:38:22,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:38:32,041 INFO L129 PetriNetUnfolder]: 55460/99121 cut-off events. [2022-07-21 08:38:32,042 INFO L130 PetriNetUnfolder]: For 1054/1054 co-relation queries the response was YES. [2022-07-21 08:38:32,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169739 conditions, 99121 events. 55460/99121 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 3797. Compared 1013926 event pairs, 16949 based on Foata normal form. 0/85494 useless extension candidates. Maximal degree in co-relation 169732. Up to 37768 conditions per place. [2022-07-21 08:38:33,336 INFO L132 encePairwiseOnDemand]: 169/184 looper letters, 43 selfloop transitions, 10 changer transitions 0/158 dead transitions. [2022-07-21 08:38:33,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 158 transitions, 457 flow [2022-07-21 08:38:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:38:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:38:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2022-07-21 08:38:33,342 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7735507246376812 [2022-07-21 08:38:33,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2022-07-21 08:38:33,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2022-07-21 08:38:33,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:38:33,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2022-07-21 08:38:33,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:33,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:33,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:33,349 INFO L186 Difference]: Start difference. First operand has 135 places, 135 transitions, 290 flow. Second operand 3 states and 427 transitions. [2022-07-21 08:38:33,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 158 transitions, 457 flow [2022-07-21 08:38:33,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 158 transitions, 457 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:38:33,356 INFO L242 Difference]: Finished difference. Result has 139 places, 145 transitions, 380 flow [2022-07-21 08:38:33,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=139, PETRI_TRANSITIONS=145} [2022-07-21 08:38:33,358 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -23 predicate places. [2022-07-21 08:38:33,358 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 145 transitions, 380 flow [2022-07-21 08:38:33,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:33,358 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:33,359 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:38:33,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:38:33,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:38:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:33,360 INFO L85 PathProgramCache]: Analyzing trace with hash -252473775, now seen corresponding path program 1 times [2022-07-21 08:38:33,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:33,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095421572] [2022-07-21 08:38:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:33,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 08:38:33,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:33,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095421572] [2022-07-21 08:38:33,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095421572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:33,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:33,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:38:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835410369] [2022-07-21 08:38:33,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:33,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:38:33,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:33,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:38:33,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:38:33,593 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 184 [2022-07-21 08:38:33,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 145 transitions, 380 flow. Second operand has 7 states, 7 states have (on average 111.14285714285714) internal successors, (778), 7 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:33,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:33,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 184 [2022-07-21 08:38:33,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand