./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2305533b08f16ed55fe1768852f1afe1d6f847d5ca6bb0bf597caf3ef6acd368 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:18:01,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:18:01,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:18:01,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:18:01,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:18:01,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:18:01,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:18:01,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:18:01,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:18:01,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:18:01,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:18:01,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:18:01,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:18:01,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:18:01,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:18:01,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:18:01,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:18:01,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:18:01,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:18:01,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:18:01,336 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:18:01,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:18:01,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:18:01,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:18:01,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:18:01,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:18:01,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:18:01,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:18:01,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:18:01,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:18:01,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:18:01,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:18:01,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:18:01,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:18:01,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:18:01,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:18:01,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:18:01,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:18:01,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:18:01,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:18:01,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:18:01,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:18:01,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:18:01,370 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:18:01,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:18:01,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:18:01,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:18:01,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:18:01,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:18:01,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:18:01,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:18:01,373 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:18:01,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:18:01,374 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:18:01,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:18:01,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:18:01,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:18:01,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:18:01,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:18:01,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:18:01,375 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:18:01,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:18:01,375 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:18:01,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:18:01,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:18:01,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:18:01,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:18:01,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:18:01,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:18:01,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:18:01,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:18:01,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:18:01,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:18:01,377 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:18:01,378 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:18:01,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:18:01,378 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2305533b08f16ed55fe1768852f1afe1d6f847d5ca6bb0bf597caf3ef6acd368 [2022-07-12 10:18:01,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:18:01,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:18:01,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:18:01,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:18:01,587 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:18:01,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i [2022-07-12 10:18:01,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc5a6b4a/13396ec1af0542ad8ef17b8b1c84b26e/FLAG6e66964df [2022-07-12 10:18:02,056 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:18:02,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i [2022-07-12 10:18:02,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc5a6b4a/13396ec1af0542ad8ef17b8b1c84b26e/FLAG6e66964df [2022-07-12 10:18:02,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc5a6b4a/13396ec1af0542ad8ef17b8b1c84b26e [2022-07-12 10:18:02,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:18:02,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:18:02,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:18:02,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:18:02,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:18:02,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad31512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02, skipping insertion in model container [2022-07-12 10:18:02,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:18:02,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:18:02,431 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2022-07-12 10:18:02,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:18:02,475 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:18:02,508 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2022-07-12 10:18:02,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:18:02,580 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:18:02,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02 WrapperNode [2022-07-12 10:18:02,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:18:02,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:18:02,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:18:02,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:18:02,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,643 INFO L137 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 198 [2022-07-12 10:18:02,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:18:02,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:18:02,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:18:02,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:18:02,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:18:02,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:18:02,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:18:02,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:18:02,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (1/1) ... [2022-07-12 10:18:02,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:18:02,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:02,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:18:02,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:18:02,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:18:02,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:18:02,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:18:02,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:18:02,720 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:18:02,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:18:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:18:02,721 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:18:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:18:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:18:02,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:18:02,722 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:18:02,808 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:18:02,809 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:18:03,049 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:18:03,055 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:18:03,055 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2022-07-12 10:18:03,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:18:03 BoogieIcfgContainer [2022-07-12 10:18:03,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:18:03,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:18:03,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:18:03,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:18:03,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:18:02" (1/3) ... [2022-07-12 10:18:03,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d34b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:18:03, skipping insertion in model container [2022-07-12 10:18:03,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:02" (2/3) ... [2022-07-12 10:18:03,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d34b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:18:03, skipping insertion in model container [2022-07-12 10:18:03,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:18:03" (3/3) ... [2022-07-12 10:18:03,075 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2022-07-12 10:18:03,079 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:18:03,085 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:18:03,086 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 10:18:03,086 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:18:03,134 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:18:03,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 178 places, 203 transitions, 414 flow [2022-07-12 10:18:03,213 INFO L129 PetriNetUnfolder]: 42/275 cut-off events. [2022-07-12 10:18:03,214 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:18:03,220 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 275 events. 42/275 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 888 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 135. Up to 8 conditions per place. [2022-07-12 10:18:03,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 203 transitions, 414 flow [2022-07-12 10:18:03,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 198 transitions, 401 flow [2022-07-12 10:18:03,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:03,237 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@7f9e67fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5df293d9 [2022-07-12 10:18:03,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:18:03,255 INFO L129 PetriNetUnfolder]: 14/163 cut-off events. [2022-07-12 10:18:03,255 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:03,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:03,256 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:03,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-12 10:18:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:03,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1755706946, now seen corresponding path program 1 times [2022-07-12 10:18:03,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:03,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245190813] [2022-07-12 10:18:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:03,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:03,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:03,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245190813] [2022-07-12 10:18:03,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245190813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:03,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:03,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132890206] [2022-07-12 10:18:03,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:03,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:03,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:03,551 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 203 [2022-07-12 10:18:03,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 198 transitions, 401 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:03,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 203 [2022-07-12 10:18:03,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:03,611 INFO L129 PetriNetUnfolder]: 3/176 cut-off events. [2022-07-12 10:18:03,612 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:03,615 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 176 events. 3/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 296 event pairs, 0 based on Foata normal form. 40/209 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-07-12 10:18:03,616 INFO L132 encePairwiseOnDemand]: 176/203 looper letters, 8 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2022-07-12 10:18:03,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 174 transitions, 373 flow [2022-07-12 10:18:03,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2022-07-12 10:18:03,637 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2022-07-12 10:18:03,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2022-07-12 10:18:03,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2022-07-12 10:18:03,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:03,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2022-07-12 10:18:03,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,655 INFO L186 Difference]: Start difference. First operand has 174 places, 198 transitions, 401 flow. Second operand 3 states and 551 transitions. [2022-07-12 10:18:03,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 174 transitions, 373 flow [2022-07-12 10:18:03,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 174 transitions, 373 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:03,663 INFO L242 Difference]: Finished difference. Result has 175 places, 172 transitions, 357 flow [2022-07-12 10:18:03,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=357, PETRI_PLACES=175, PETRI_TRANSITIONS=172} [2022-07-12 10:18:03,668 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2022-07-12 10:18:03,668 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 172 transitions, 357 flow [2022-07-12 10:18:03,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,669 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:03,670 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:03,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:18:03,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-12 10:18:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash 341960441, now seen corresponding path program 1 times [2022-07-12 10:18:03,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:03,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099130879] [2022-07-12 10:18:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:03,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:03,719 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:03,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:03,777 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:03,778 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-12 10:18:03,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-12 10:18:03,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-12 10:18:03,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-12 10:18:03,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:18:03,781 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:18:03,782 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:03,783 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:18:03,804 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:18:03,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 227 places, 263 transitions, 544 flow [2022-07-12 10:18:03,842 INFO L129 PetriNetUnfolder]: 71/432 cut-off events. [2022-07-12 10:18:03,843 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:18:03,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 432 events. 71/432 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1670 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 277. Up to 12 conditions per place. [2022-07-12 10:18:03,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 263 transitions, 544 flow [2022-07-12 10:18:03,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 263 transitions, 544 flow [2022-07-12 10:18:03,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:03,859 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@7f9e67fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5df293d9 [2022-07-12 10:18:03,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:18:03,869 INFO L129 PetriNetUnfolder]: 15/169 cut-off events. [2022-07-12 10:18:03,869 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:18:03,869 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:03,869 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:03,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:18:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash -985271127, now seen corresponding path program 1 times [2022-07-12 10:18:03,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:03,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795958239] [2022-07-12 10:18:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:03,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:03,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:03,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795958239] [2022-07-12 10:18:03,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795958239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:03,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:03,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:03,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040059475] [2022-07-12 10:18:03,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:03,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:03,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:03,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:03,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:03,915 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 263 [2022-07-12 10:18:03,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 263 transitions, 544 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:03,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 263 [2022-07-12 10:18:03,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:03,983 INFO L129 PetriNetUnfolder]: 7/320 cut-off events. [2022-07-12 10:18:03,984 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-12 10:18:03,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 320 events. 7/320 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1017 event pairs, 0 based on Foata normal form. 127/432 useless extension candidates. Maximal degree in co-relation 203. Up to 16 conditions per place. [2022-07-12 10:18:03,987 INFO L132 encePairwiseOnDemand]: 225/263 looper letters, 13 selfloop transitions, 2 changer transitions 0/229 dead transitions. [2022-07-12 10:18:03,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 229 transitions, 506 flow [2022-07-12 10:18:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 705 transitions. [2022-07-12 10:18:03,990 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8935361216730038 [2022-07-12 10:18:03,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 705 transitions. [2022-07-12 10:18:03,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 705 transitions. [2022-07-12 10:18:03,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:03,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 705 transitions. [2022-07-12 10:18:03,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,994 INFO L186 Difference]: Start difference. First operand has 227 places, 263 transitions, 544 flow. Second operand 3 states and 705 transitions. [2022-07-12 10:18:03,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 229 transitions, 506 flow [2022-07-12 10:18:04,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 229 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:04,015 INFO L242 Difference]: Finished difference. Result has 227 places, 226 transitions, 480 flow [2022-07-12 10:18:04,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=480, PETRI_PLACES=227, PETRI_TRANSITIONS=226} [2022-07-12 10:18:04,016 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, 0 predicate places. [2022-07-12 10:18:04,016 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 226 transitions, 480 flow [2022-07-12 10:18:04,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:04,017 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:04,017 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:04,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:18:04,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:18:04,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:04,018 INFO L85 PathProgramCache]: Analyzing trace with hash 699851186, now seen corresponding path program 1 times [2022-07-12 10:18:04,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:04,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932443704] [2022-07-12 10:18:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:04,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:04,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932443704] [2022-07-12 10:18:04,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932443704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:04,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:04,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 10:18:04,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007393856] [2022-07-12 10:18:04,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:04,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:18:04,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:18:04,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:18:04,448 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 263 [2022-07-12 10:18:04,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 226 transitions, 480 flow. Second operand has 12 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:04,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:04,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 263 [2022-07-12 10:18:04,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:08,367 INFO L129 PetriNetUnfolder]: 13877/34743 cut-off events. [2022-07-12 10:18:08,367 INFO L130 PetriNetUnfolder]: For 312/312 co-relation queries the response was YES. [2022-07-12 10:18:08,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56521 conditions, 34743 events. 13877/34743 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 1337. Compared 421386 event pairs, 3273 based on Foata normal form. 0/33541 useless extension candidates. Maximal degree in co-relation 56403. Up to 9611 conditions per place. [2022-07-12 10:18:08,531 INFO L132 encePairwiseOnDemand]: 247/263 looper letters, 347 selfloop transitions, 45 changer transitions 127/659 dead transitions. [2022-07-12 10:18:08,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 659 transitions, 2448 flow [2022-07-12 10:18:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 10:18:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-12 10:18:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3998 transitions. [2022-07-12 10:18:08,537 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6080608365019011 [2022-07-12 10:18:08,537 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3998 transitions. [2022-07-12 10:18:08,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3998 transitions. [2022-07-12 10:18:08,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:08,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3998 transitions. [2022-07-12 10:18:08,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 159.92) internal successors, (3998), 25 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 263.0) internal successors, (6838), 26 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,554 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 263.0) internal successors, (6838), 26 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,554 INFO L186 Difference]: Start difference. First operand has 227 places, 226 transitions, 480 flow. Second operand 25 states and 3998 transitions. [2022-07-12 10:18:08,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 659 transitions, 2448 flow [2022-07-12 10:18:08,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 659 transitions, 2446 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:08,562 INFO L242 Difference]: Finished difference. Result has 261 places, 274 transitions, 777 flow [2022-07-12 10:18:08,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=777, PETRI_PLACES=261, PETRI_TRANSITIONS=274} [2022-07-12 10:18:08,563 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, 34 predicate places. [2022-07-12 10:18:08,564 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 274 transitions, 777 flow [2022-07-12 10:18:08,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,564 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:08,565 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:08,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:18:08,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:18:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:08,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1556719885, now seen corresponding path program 1 times [2022-07-12 10:18:08,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:08,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670283305] [2022-07-12 10:18:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:08,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:08,603 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:08,629 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:08,629 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:08,629 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:18:08,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:18:08,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-12 10:18:08,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:18:08,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:18:08,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:18:08,630 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:18:08,631 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:08,631 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:18:08,649 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:18:08,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 276 places, 323 transitions, 676 flow [2022-07-12 10:18:08,712 INFO L129 PetriNetUnfolder]: 105/622 cut-off events. [2022-07-12 10:18:08,712 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:18:08,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 622 events. 105/622 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2641 event pairs, 1 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 440. Up to 16 conditions per place. [2022-07-12 10:18:08,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 323 transitions, 676 flow [2022-07-12 10:18:08,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 323 transitions, 676 flow [2022-07-12 10:18:08,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:08,730 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@7f9e67fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5df293d9 [2022-07-12 10:18:08,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:18:08,738 INFO L129 PetriNetUnfolder]: 16/169 cut-off events. [2022-07-12 10:18:08,738 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:18:08,739 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:08,739 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:08,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-12 10:18:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash 645618892, now seen corresponding path program 1 times [2022-07-12 10:18:08,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:08,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763993870] [2022-07-12 10:18:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:08,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:08,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:08,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763993870] [2022-07-12 10:18:08,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763993870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:08,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:08,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:08,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743577603] [2022-07-12 10:18:08,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:08,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:08,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:08,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:08,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:08,783 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 323 [2022-07-12 10:18:08,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 323 transitions, 676 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:08,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 323 [2022-07-12 10:18:08,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:08,891 INFO L129 PetriNetUnfolder]: 14/481 cut-off events. [2022-07-12 10:18:08,892 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-12 10:18:08,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 481 events. 14/481 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1920 event pairs, 1 based on Foata normal form. 335/792 useless extension candidates. Maximal degree in co-relation 348. Up to 30 conditions per place. [2022-07-12 10:18:08,896 INFO L132 encePairwiseOnDemand]: 274/323 looper letters, 15 selfloop transitions, 2 changer transitions 0/277 dead transitions. [2022-07-12 10:18:08,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 277 transitions, 618 flow [2022-07-12 10:18:08,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 856 transitions. [2022-07-12 10:18:08,899 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8833849329205367 [2022-07-12 10:18:08,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 856 transitions. [2022-07-12 10:18:08,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 856 transitions. [2022-07-12 10:18:08,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:08,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 856 transitions. [2022-07-12 10:18:08,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,903 INFO L186 Difference]: Start difference. First operand has 276 places, 323 transitions, 676 flow. Second operand 3 states and 856 transitions. [2022-07-12 10:18:08,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 277 transitions, 618 flow [2022-07-12 10:18:08,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 277 transitions, 618 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:08,907 INFO L242 Difference]: Finished difference. Result has 275 places, 274 transitions, 588 flow [2022-07-12 10:18:08,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=588, PETRI_PLACES=275, PETRI_TRANSITIONS=274} [2022-07-12 10:18:08,908 INFO L279 CegarLoopForPetriNet]: 276 programPoint places, -1 predicate places. [2022-07-12 10:18:08,908 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 274 transitions, 588 flow [2022-07-12 10:18:08,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:08,909 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:08,909 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:08,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:18:08,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-12 10:18:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:08,910 INFO L85 PathProgramCache]: Analyzing trace with hash 179903816, now seen corresponding path program 1 times [2022-07-12 10:18:08,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:08,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759268692] [2022-07-12 10:18:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:08,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:09,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:09,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759268692] [2022-07-12 10:18:09,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759268692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:09,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:09,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 10:18:09,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017649540] [2022-07-12 10:18:09,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:09,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:18:09,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:09,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:18:09,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:18:09,077 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 323 [2022-07-12 10:18:09,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 274 transitions, 588 flow. Second operand has 12 states, 12 states have (on average 175.58333333333334) internal successors, (2107), 12 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:09,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:09,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 323 [2022-07-12 10:18:09,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand