./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.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 a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:56:27,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:56:27,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:56:27,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:56:27,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:56:27,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:56:27,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:56:27,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:56:27,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:56:27,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:56:27,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:56:27,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:56:27,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:56:27,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:56:27,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:56:27,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:56:27,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:56:27,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:56:27,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:56:27,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:56:27,559 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:56:27,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:56:27,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:56:27,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:56:27,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:56:27,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:56:27,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:56:27,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:56:27,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:56:27,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:56:27,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:56:27,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:56:27,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:56:27,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:56:27,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:56:27,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:56:27,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:56:27,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:56:27,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:56:27,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:56:27,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:56:27,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:56:27,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:56:27,600 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:56:27,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:56:27,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:56:27,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:56:27,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:56:27,601 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:56:27,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:56:27,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:56:27,602 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:56:27,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:56:27,603 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:56:27,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:56:27,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:56:27,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:56:27,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:56:27,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:56:27,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:56:27,604 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:56:27,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:56:27,605 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:56:27,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:56:27,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:56:27,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:56:27,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:56:27,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:56:27,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:56:27,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:56:27,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:56:27,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:56:27,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:56:27,606 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:56:27,606 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:56:27,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:56:27,607 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2022-07-13 21:56:27,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:56:27,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:56:27,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:56:27,798 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:56:27,798 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:56:27,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2022-07-13 21:56:27,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/712fe48d8/89297cb5682c4682a9681e5283aa0e7a/FLAG2e6b23e60 [2022-07-13 21:56:28,230 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:56:28,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2022-07-13 21:56:28,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/712fe48d8/89297cb5682c4682a9681e5283aa0e7a/FLAG2e6b23e60 [2022-07-13 21:56:28,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/712fe48d8/89297cb5682c4682a9681e5283aa0e7a [2022-07-13 21:56:28,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:56:28,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:56:28,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:56:28,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:56:28,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:56:28,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb225e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28, skipping insertion in model container [2022-07-13 21:56:28,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:56:28,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:56:28,538 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_19-callback_racing.i[30212,30225] [2022-07-13 21:56:28,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:56:28,570 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:56:28,599 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_19-callback_racing.i[30212,30225] [2022-07-13 21:56:28,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:56:28,629 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:56:28,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28 WrapperNode [2022-07-13 21:56:28,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:56:28,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:56:28,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:56:28,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:56:28,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,662 INFO L137 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-07-13 21:56:28,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:56:28,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:56:28,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:56:28,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:56:28,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:56:28,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:56:28,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:56:28,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:56:28,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:56:28,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:28,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:56:28,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:56:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:56:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:56:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:56:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:56:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:56:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-13 21:56:28,758 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-13 21:56:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:56:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:56:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:56:28,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:56:28,760 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:56:28,848 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:56:28,849 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:56:29,046 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:56:29,055 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:56:29,056 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-13 21:56:29,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:56:29 BoogieIcfgContainer [2022-07-13 21:56:29,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:56:29,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:56:29,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:56:29,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:56:29,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:56:28" (1/3) ... [2022-07-13 21:56:29,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b73121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:56:29, skipping insertion in model container [2022-07-13 21:56:29,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (2/3) ... [2022-07-13 21:56:29,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b73121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:56:29, skipping insertion in model container [2022-07-13 21:56:29,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:56:29" (3/3) ... [2022-07-13 21:56:29,063 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2022-07-13 21:56:29,066 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:56:29,072 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:56:29,072 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:56:29,072 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:56:29,128 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:56:29,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 146 transitions, 300 flow [2022-07-13 21:56:29,220 INFO L129 PetriNetUnfolder]: 26/222 cut-off events. [2022-07-13 21:56:29,221 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:29,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 222 events. 26/222 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 594 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2022-07-13 21:56:29,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 146 transitions, 300 flow [2022-07-13 21:56:29,232 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 141 transitions, 287 flow [2022-07-13 21:56:29,250 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:29,256 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@55b6832a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@40b8e9e2 [2022-07-13 21:56:29,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 21:56:29,299 INFO L129 PetriNetUnfolder]: 5/102 cut-off events. [2022-07-13 21:56:29,299 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:29,300 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:29,301 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] [2022-07-13 21:56:29,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:56:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash 150697490, now seen corresponding path program 1 times [2022-07-13 21:56:29,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:29,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005145663] [2022-07-13 21:56:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:29,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:29,452 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:29,493 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:29,498 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:29,499 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-13 21:56:29,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-13 21:56:29,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-13 21:56:29,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:56:29,501 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-13 21:56:29,504 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:29,504 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:56:29,529 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:56:29,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 170 transitions, 358 flow [2022-07-13 21:56:29,574 INFO L129 PetriNetUnfolder]: 43/347 cut-off events. [2022-07-13 21:56:29,574 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:56:29,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 347 events. 43/347 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1231 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 224. Up to 9 conditions per place. [2022-07-13 21:56:29,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 170 transitions, 358 flow [2022-07-13 21:56:29,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 170 transitions, 358 flow [2022-07-13 21:56:29,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:29,579 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@55b6832a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@40b8e9e2 [2022-07-13 21:56:29,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:56:29,585 INFO L129 PetriNetUnfolder]: 7/113 cut-off events. [2022-07-13 21:56:29,586 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:29,586 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:29,586 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:29,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:56:29,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:29,587 INFO L85 PathProgramCache]: Analyzing trace with hash -845533704, now seen corresponding path program 1 times [2022-07-13 21:56:29,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:29,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869802546] [2022-07-13 21:56:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:29,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:29,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869802546] [2022-07-13 21:56:29,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869802546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:29,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:29,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:56:29,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399361277] [2022-07-13 21:56:29,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:29,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:56:29,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:29,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:56:29,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:56:29,741 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 170 [2022-07-13 21:56:29,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 170 transitions, 358 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:29,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 170 [2022-07-13 21:56:29,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:30,046 INFO L129 PetriNetUnfolder]: 220/1706 cut-off events. [2022-07-13 21:56:30,046 INFO L130 PetriNetUnfolder]: For 125/147 co-relation queries the response was YES. [2022-07-13 21:56:30,052 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 1706 events. 220/1706 cut-off events. For 125/147 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 12741 event pairs, 41 based on Foata normal form. 489/2084 useless extension candidates. Maximal degree in co-relation 1258. Up to 146 conditions per place. [2022-07-13 21:56:30,057 INFO L132 encePairwiseOnDemand]: 149/170 looper letters, 43 selfloop transitions, 8 changer transitions 5/194 dead transitions. [2022-07-13 21:56:30,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 194 transitions, 552 flow [2022-07-13 21:56:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:56:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:56:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1236 transitions. [2022-07-13 21:56:30,074 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9088235294117647 [2022-07-13 21:56:30,075 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1236 transitions. [2022-07-13 21:56:30,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1236 transitions. [2022-07-13 21:56:30,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:30,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1236 transitions. [2022-07-13 21:56:30,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.5) internal successors, (1236), 8 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,095 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,097 INFO L186 Difference]: Start difference. First operand has 156 places, 170 transitions, 358 flow. Second operand 8 states and 1236 transitions. [2022-07-13 21:56:30,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 194 transitions, 552 flow [2022-07-13 21:56:30,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 194 transitions, 552 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:30,105 INFO L242 Difference]: Finished difference. Result has 166 places, 160 transitions, 383 flow [2022-07-13 21:56:30,106 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=383, PETRI_PLACES=166, PETRI_TRANSITIONS=160} [2022-07-13 21:56:30,113 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 10 predicate places. [2022-07-13 21:56:30,114 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 160 transitions, 383 flow [2022-07-13 21:56:30,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,114 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:30,115 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] [2022-07-13 21:56:30,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:56:30,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:56:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash 357930258, now seen corresponding path program 1 times [2022-07-13 21:56:30,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:30,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248120365] [2022-07-13 21:56:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:30,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:30,161 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:30,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:30,192 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:30,192 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-13 21:56:30,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-13 21:56:30,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-13 21:56:30,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-13 21:56:30,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:56:30,197 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:56:30,197 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:30,198 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:56:30,222 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 21:56:30,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 178 places, 194 transitions, 418 flow [2022-07-13 21:56:30,258 INFO L129 PetriNetUnfolder]: 65/505 cut-off events. [2022-07-13 21:56:30,258 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-13 21:56:30,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 505 events. 65/505 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2024 event pairs, 1 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 355. Up to 16 conditions per place. [2022-07-13 21:56:30,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 194 transitions, 418 flow [2022-07-13 21:56:30,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 194 transitions, 418 flow [2022-07-13 21:56:30,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:30,268 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@55b6832a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@40b8e9e2 [2022-07-13 21:56:30,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:56:30,276 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2022-07-13 21:56:30,276 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:30,276 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:30,276 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:30,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:56:30,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:30,277 INFO L85 PathProgramCache]: Analyzing trace with hash 612409166, now seen corresponding path program 1 times [2022-07-13 21:56:30,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:30,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721040781] [2022-07-13 21:56:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:30,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:30,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:30,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721040781] [2022-07-13 21:56:30,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721040781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:30,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:30,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:56:30,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523833916] [2022-07-13 21:56:30,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:30,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:56:30,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:56:30,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:56:30,348 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 194 [2022-07-13 21:56:30,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 194 transitions, 418 flow. Second operand has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:30,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 194 [2022-07-13 21:56:30,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:30,875 INFO L129 PetriNetUnfolder]: 749/4353 cut-off events. [2022-07-13 21:56:30,875 INFO L130 PetriNetUnfolder]: For 552/611 co-relation queries the response was YES. [2022-07-13 21:56:30,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5707 conditions, 4353 events. 749/4353 cut-off events. For 552/611 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 40701 event pairs, 117 based on Foata normal form. 1698/5759 useless extension candidates. Maximal degree in co-relation 3172. Up to 425 conditions per place. [2022-07-13 21:56:30,901 INFO L132 encePairwiseOnDemand]: 170/194 looper letters, 65 selfloop transitions, 8 changer transitions 0/228 dead transitions. [2022-07-13 21:56:30,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 228 transitions, 698 flow [2022-07-13 21:56:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:56:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:56:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1410 transitions. [2022-07-13 21:56:30,904 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9085051546391752 [2022-07-13 21:56:30,904 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1410 transitions. [2022-07-13 21:56:30,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1410 transitions. [2022-07-13 21:56:30,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:30,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1410 transitions. [2022-07-13 21:56:30,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 176.25) internal successors, (1410), 8 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 194.0) internal successors, (1746), 9 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,910 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 194.0) internal successors, (1746), 9 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,910 INFO L186 Difference]: Start difference. First operand has 178 places, 194 transitions, 418 flow. Second operand 8 states and 1410 transitions. [2022-07-13 21:56:30,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 228 transitions, 698 flow [2022-07-13 21:56:30,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 228 transitions, 698 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:30,917 INFO L242 Difference]: Finished difference. Result has 187 places, 180 transitions, 435 flow [2022-07-13 21:56:30,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=435, PETRI_PLACES=187, PETRI_TRANSITIONS=180} [2022-07-13 21:56:30,918 INFO L279 CegarLoopForPetriNet]: 178 programPoint places, 9 predicate places. [2022-07-13 21:56:30,919 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 180 transitions, 435 flow [2022-07-13 21:56:30,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,919 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:30,919 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] [2022-07-13 21:56:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:56:30,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:56:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1226980834, now seen corresponding path program 1 times [2022-07-13 21:56:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:30,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929835214] [2022-07-13 21:56:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:30,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:56:30,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:30,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929835214] [2022-07-13 21:56:30,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929835214] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:30,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:30,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:56:30,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825600387] [2022-07-13 21:56:30,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:30,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:56:30,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:30,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:56:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:56:30,992 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 194 [2022-07-13 21:56:30,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 180 transitions, 435 flow. Second operand has 5 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:30,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 194 [2022-07-13 21:56:30,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:31,877 INFO L129 PetriNetUnfolder]: 1227/7849 cut-off events. [2022-07-13 21:56:31,877 INFO L130 PetriNetUnfolder]: For 2034/2198 co-relation queries the response was YES. [2022-07-13 21:56:31,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11154 conditions, 7849 events. 1227/7849 cut-off events. For 2034/2198 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 85947 event pairs, 348 based on Foata normal form. 25/7327 useless extension candidates. Maximal degree in co-relation 7830. Up to 850 conditions per place. [2022-07-13 21:56:31,930 INFO L132 encePairwiseOnDemand]: 188/194 looper letters, 63 selfloop transitions, 14 changer transitions 0/235 dead transitions. [2022-07-13 21:56:31,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 235 transitions, 809 flow [2022-07-13 21:56:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:56:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:56:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1313 transitions. [2022-07-13 21:56:31,933 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8460051546391752 [2022-07-13 21:56:31,933 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1313 transitions. [2022-07-13 21:56:31,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1313 transitions. [2022-07-13 21:56:31,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:31,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1313 transitions. [2022-07-13 21:56:31,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.125) internal successors, (1313), 8 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 194.0) internal successors, (1746), 9 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,938 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 194.0) internal successors, (1746), 9 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,938 INFO L186 Difference]: Start difference. First operand has 187 places, 180 transitions, 435 flow. Second operand 8 states and 1313 transitions. [2022-07-13 21:56:31,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 235 transitions, 809 flow [2022-07-13 21:56:31,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 235 transitions, 809 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:31,947 INFO L242 Difference]: Finished difference. Result has 198 places, 190 transitions, 533 flow [2022-07-13 21:56:31,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=533, PETRI_PLACES=198, PETRI_TRANSITIONS=190} [2022-07-13 21:56:31,948 INFO L279 CegarLoopForPetriNet]: 178 programPoint places, 20 predicate places. [2022-07-13 21:56:31,948 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 190 transitions, 533 flow [2022-07-13 21:56:31,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,948 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:31,948 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:31,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:56:31,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:56:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1926628457, now seen corresponding path program 1 times [2022-07-13 21:56:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:31,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609363506] [2022-07-13 21:56:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:31,998 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:32,033 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:32,033 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:32,034 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-13 21:56:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-13 21:56:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-13 21:56:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-13 21:56:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-13 21:56:32,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:56:32,035 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 21:56:32,035 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:32,035 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:56:32,057 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 21:56:32,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 200 places, 218 transitions, 480 flow [2022-07-13 21:56:32,104 INFO L129 PetriNetUnfolder]: 99/731 cut-off events. [2022-07-13 21:56:32,104 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-13 21:56:32,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 731 events. 99/731 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3237 event pairs, 6 based on Foata normal form. 0/628 useless extension candidates. Maximal degree in co-relation 525. Up to 32 conditions per place. [2022-07-13 21:56:32,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 218 transitions, 480 flow [2022-07-13 21:56:32,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 218 transitions, 480 flow [2022-07-13 21:56:32,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:32,116 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@55b6832a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@40b8e9e2 [2022-07-13 21:56:32,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:56:32,121 INFO L129 PetriNetUnfolder]: 5/109 cut-off events. [2022-07-13 21:56:32,122 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:32,122 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:32,122 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:32,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:56:32,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:32,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1855384498, now seen corresponding path program 1 times [2022-07-13 21:56:32,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:32,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007896595] [2022-07-13 21:56:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:32,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:32,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:32,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007896595] [2022-07-13 21:56:32,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007896595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:32,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:32,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:56:32,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091457178] [2022-07-13 21:56:32,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:32,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:56:32,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:56:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:56:32,191 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 218 [2022-07-13 21:56:32,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 218 transitions, 480 flow. Second operand has 5 states, 5 states have (on average 173.2) internal successors, (866), 5 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:32,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 218 [2022-07-13 21:56:32,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:33,499 INFO L129 PetriNetUnfolder]: 2370/11346 cut-off events. [2022-07-13 21:56:33,499 INFO L130 PetriNetUnfolder]: For 2245/2388 co-relation queries the response was YES. [2022-07-13 21:56:33,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15482 conditions, 11346 events. 2370/11346 cut-off events. For 2245/2388 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 125634 event pairs, 385 based on Foata normal form. 5366/15942 useless extension candidates. Maximal degree in co-relation 8560. Up to 1187 conditions per place. [2022-07-13 21:56:33,642 INFO L132 encePairwiseOnDemand]: 191/218 looper letters, 82 selfloop transitions, 8 changer transitions 0/262 dead transitions. [2022-07-13 21:56:33,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 262 transitions, 850 flow [2022-07-13 21:56:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:56:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:56:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1584 transitions. [2022-07-13 21:56:33,646 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.908256880733945 [2022-07-13 21:56:33,646 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1584 transitions. [2022-07-13 21:56:33,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1584 transitions. [2022-07-13 21:56:33,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:33,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1584 transitions. [2022-07-13 21:56:33,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.0) internal successors, (1584), 8 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 218.0) internal successors, (1962), 9 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,651 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 218.0) internal successors, (1962), 9 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,652 INFO L186 Difference]: Start difference. First operand has 200 places, 218 transitions, 480 flow. Second operand 8 states and 1584 transitions. [2022-07-13 21:56:33,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 262 transitions, 850 flow [2022-07-13 21:56:33,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 262 transitions, 850 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:33,656 INFO L242 Difference]: Finished difference. Result has 208 places, 200 transitions, 489 flow [2022-07-13 21:56:33,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=489, PETRI_PLACES=208, PETRI_TRANSITIONS=200} [2022-07-13 21:56:33,657 INFO L279 CegarLoopForPetriNet]: 200 programPoint places, 8 predicate places. [2022-07-13 21:56:33,657 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 200 transitions, 489 flow [2022-07-13 21:56:33,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.2) internal successors, (866), 5 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,658 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:33,658 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] [2022-07-13 21:56:33,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:56:33,659 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:56:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:33,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1616348364, now seen corresponding path program 1 times [2022-07-13 21:56:33,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:33,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214458840] [2022-07-13 21:56:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:33,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:56:33,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214458840] [2022-07-13 21:56:33,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214458840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:33,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:33,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:56:33,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274436528] [2022-07-13 21:56:33,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:33,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:56:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:56:33,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:56:33,728 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 218 [2022-07-13 21:56:33,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 200 transitions, 489 flow. Second operand has 5 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:33,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 218 [2022-07-13 21:56:33,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:36,020 INFO L129 PetriNetUnfolder]: 4080/21139 cut-off events. [2022-07-13 21:56:36,021 INFO L130 PetriNetUnfolder]: For 6209/6628 co-relation queries the response was YES. [2022-07-13 21:56:36,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30703 conditions, 21139 events. 4080/21139 cut-off events. For 6209/6628 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 267386 event pairs, 1011 based on Foata normal form. 64/19684 useless extension candidates. Maximal degree in co-relation 21590. Up to 2506 conditions per place. [2022-07-13 21:56:36,172 INFO L132 encePairwiseOnDemand]: 212/218 looper letters, 80 selfloop transitions, 14 changer transitions 0/269 dead transitions. [2022-07-13 21:56:36,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 269 transitions, 961 flow [2022-07-13 21:56:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:56:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:56:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1466 transitions. [2022-07-13 21:56:36,179 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8405963302752294 [2022-07-13 21:56:36,180 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1466 transitions. [2022-07-13 21:56:36,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1466 transitions. [2022-07-13 21:56:36,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:36,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1466 transitions. [2022-07-13 21:56:36,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 183.25) internal successors, (1466), 8 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:36,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 218.0) internal successors, (1962), 9 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:36,185 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 218.0) internal successors, (1962), 9 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:36,186 INFO L186 Difference]: Start difference. First operand has 208 places, 200 transitions, 489 flow. Second operand 8 states and 1466 transitions. [2022-07-13 21:56:36,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 269 transitions, 961 flow [2022-07-13 21:56:36,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 269 transitions, 961 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:36,201 INFO L242 Difference]: Finished difference. Result has 219 places, 210 transitions, 587 flow [2022-07-13 21:56:36,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=587, PETRI_PLACES=219, PETRI_TRANSITIONS=210} [2022-07-13 21:56:36,203 INFO L279 CegarLoopForPetriNet]: 200 programPoint places, 19 predicate places. [2022-07-13 21:56:36,203 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 210 transitions, 587 flow [2022-07-13 21:56:36,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:36,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:36,204 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] [2022-07-13 21:56:36,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:56:36,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:56:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1324240171, now seen corresponding path program 1 times [2022-07-13 21:56:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:36,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123002629] [2022-07-13 21:56:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:56:36,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:36,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123002629] [2022-07-13 21:56:36,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123002629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:36,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:36,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:56:36,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697142500] [2022-07-13 21:56:36,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:36,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:56:36,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:36,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:56:36,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:56:36,283 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 218 [2022-07-13 21:56:36,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 210 transitions, 587 flow. Second operand has 5 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:36,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:36,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 218 [2022-07-13 21:56:36,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:40,710 INFO L129 PetriNetUnfolder]: 6543/37417 cut-off events. [2022-07-13 21:56:40,710 INFO L130 PetriNetUnfolder]: For 12659/13406 co-relation queries the response was YES. [2022-07-13 21:56:41,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55213 conditions, 37417 events. 6543/37417 cut-off events. For 12659/13406 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 541092 event pairs, 2385 based on Foata normal form. 72/34874 useless extension candidates. Maximal degree in co-relation 40724. Up to 4409 conditions per place. [2022-07-13 21:56:41,127 INFO L132 encePairwiseOnDemand]: 212/218 looper letters, 76 selfloop transitions, 32 changer transitions 2/288 dead transitions. [2022-07-13 21:56:41,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 288 transitions, 1211 flow [2022-07-13 21:56:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:56:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:56:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1464 transitions. [2022-07-13 21:56:41,130 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8394495412844036 [2022-07-13 21:56:41,130 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1464 transitions. [2022-07-13 21:56:41,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1464 transitions. [2022-07-13 21:56:41,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:41,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1464 transitions. [2022-07-13 21:56:41,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 218.0) internal successors, (1962), 9 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,138 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 218.0) internal successors, (1962), 9 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,138 INFO L186 Difference]: Start difference. First operand has 219 places, 210 transitions, 587 flow. Second operand 8 states and 1464 transitions. [2022-07-13 21:56:41,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 288 transitions, 1211 flow [2022-07-13 21:56:41,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 288 transitions, 1211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:41,177 INFO L242 Difference]: Finished difference. Result has 230 places, 232 transitions, 873 flow [2022-07-13 21:56:41,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=873, PETRI_PLACES=230, PETRI_TRANSITIONS=232} [2022-07-13 21:56:41,179 INFO L279 CegarLoopForPetriNet]: 200 programPoint places, 30 predicate places. [2022-07-13 21:56:41,179 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 232 transitions, 873 flow [2022-07-13 21:56:41,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,179 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:41,180 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:41,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:56:41,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:56:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:41,180 INFO L85 PathProgramCache]: Analyzing trace with hash 725009633, now seen corresponding path program 1 times [2022-07-13 21:56:41,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:41,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832538088] [2022-07-13 21:56:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:41,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:41,197 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:41,223 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:41,225 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:41,225 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-13 21:56:41,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-13 21:56:41,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-13 21:56:41,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-13 21:56:41,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-13 21:56:41,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-13 21:56:41,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:56:41,227 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:56:41,227 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:41,227 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-13 21:56:41,267 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-13 21:56:41,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 222 places, 242 transitions, 544 flow [2022-07-13 21:56:41,347 INFO L129 PetriNetUnfolder]: 161/1097 cut-off events. [2022-07-13 21:56:41,347 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-13 21:56:41,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 1097 events. 161/1097 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5477 event pairs, 23 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 776. Up to 80 conditions per place. [2022-07-13 21:56:41,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 242 transitions, 544 flow [2022-07-13 21:56:41,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 242 transitions, 544 flow [2022-07-13 21:56:41,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:41,364 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@55b6832a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@40b8e9e2 [2022-07-13 21:56:41,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-13 21:56:41,367 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2022-07-13 21:56:41,367 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:41,368 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:41,368 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:41,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:56:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash -326303070, now seen corresponding path program 1 times [2022-07-13 21:56:41,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:41,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022925981] [2022-07-13 21:56:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:41,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:41,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:41,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022925981] [2022-07-13 21:56:41,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022925981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:41,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:41,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:56:41,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282035418] [2022-07-13 21:56:41,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:41,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:56:41,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:41,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:56:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:56:41,414 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 242 [2022-07-13 21:56:41,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 242 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 190.2) internal successors, (951), 5 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:41,415 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 242 [2022-07-13 21:56:41,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:44,693 INFO L129 PetriNetUnfolder]: 7221/28496 cut-off events. [2022-07-13 21:56:44,693 INFO L130 PetriNetUnfolder]: For 7865/8196 co-relation queries the response was YES. [2022-07-13 21:56:44,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40846 conditions, 28496 events. 7221/28496 cut-off events. For 7865/8196 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 352901 event pairs, 1039 based on Foata normal form. 16288/42994 useless extension candidates. Maximal degree in co-relation 23178. Up to 3313 conditions per place. [2022-07-13 21:56:44,946 INFO L132 encePairwiseOnDemand]: 212/242 looper letters, 99 selfloop transitions, 8 changer transitions 0/296 dead transitions. [2022-07-13 21:56:44,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 296 transitions, 1008 flow [2022-07-13 21:56:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:56:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:56:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1758 transitions. [2022-07-13 21:56:44,949 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9080578512396694 [2022-07-13 21:56:44,950 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1758 transitions. [2022-07-13 21:56:44,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1758 transitions. [2022-07-13 21:56:44,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:44,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1758 transitions. [2022-07-13 21:56:44,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 219.75) internal successors, (1758), 8 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:44,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 242.0) internal successors, (2178), 9 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:44,958 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 242.0) internal successors, (2178), 9 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:44,958 INFO L186 Difference]: Start difference. First operand has 222 places, 242 transitions, 544 flow. Second operand 8 states and 1758 transitions. [2022-07-13 21:56:44,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 296 transitions, 1008 flow [2022-07-13 21:56:44,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 296 transitions, 1008 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:44,966 INFO L242 Difference]: Finished difference. Result has 229 places, 220 transitions, 545 flow [2022-07-13 21:56:44,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=545, PETRI_PLACES=229, PETRI_TRANSITIONS=220} [2022-07-13 21:56:44,967 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 7 predicate places. [2022-07-13 21:56:44,968 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 220 transitions, 545 flow [2022-07-13 21:56:44,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.2) internal successors, (951), 5 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:44,968 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:44,968 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] [2022-07-13 21:56:44,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:56:44,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:56:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:44,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2030427744, now seen corresponding path program 1 times [2022-07-13 21:56:44,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:44,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102602693] [2022-07-13 21:56:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:44,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:56:45,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:45,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102602693] [2022-07-13 21:56:45,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102602693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:45,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:45,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:56:45,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011629479] [2022-07-13 21:56:45,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:45,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:56:45,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:56:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:56:45,005 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 242 [2022-07-13 21:56:45,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 220 transitions, 545 flow. Second operand has 5 states, 5 states have (on average 190.4) internal successors, (952), 5 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:45,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:45,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 242 [2022-07-13 21:56:45,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:51,976 INFO L129 PetriNetUnfolder]: 12758/55508 cut-off events. [2022-07-13 21:56:51,977 INFO L130 PetriNetUnfolder]: For 19771/20707 co-relation queries the response was YES. [2022-07-13 21:56:52,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82654 conditions, 55508 events. 12758/55508 cut-off events. For 19771/20707 co-relation queries the response was YES. Maximal size of possible extension queue 1219. Compared 782786 event pairs, 2966 based on Foata normal form. 137/51714 useless extension candidates. Maximal degree in co-relation 57950. Up to 7154 conditions per place. [2022-07-13 21:56:52,551 INFO L132 encePairwiseOnDemand]: 236/242 looper letters, 97 selfloop transitions, 14 changer transitions 0/303 dead transitions. [2022-07-13 21:56:52,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 303 transitions, 1119 flow [2022-07-13 21:56:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:56:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:56:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1619 transitions. [2022-07-13 21:56:52,554 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8362603305785123 [2022-07-13 21:56:52,554 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1619 transitions. [2022-07-13 21:56:52,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1619 transitions. [2022-07-13 21:56:52,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:52,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1619 transitions. [2022-07-13 21:56:52,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.375) internal successors, (1619), 8 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:52,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 242.0) internal successors, (2178), 9 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:52,561 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 242.0) internal successors, (2178), 9 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:52,561 INFO L186 Difference]: Start difference. First operand has 229 places, 220 transitions, 545 flow. Second operand 8 states and 1619 transitions. [2022-07-13 21:56:52,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 303 transitions, 1119 flow [2022-07-13 21:56:52,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 303 transitions, 1119 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:52,599 INFO L242 Difference]: Finished difference. Result has 240 places, 230 transitions, 643 flow [2022-07-13 21:56:52,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=643, PETRI_PLACES=240, PETRI_TRANSITIONS=230} [2022-07-13 21:56:52,600 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 18 predicate places. [2022-07-13 21:56:52,600 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 230 transitions, 643 flow [2022-07-13 21:56:52,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.4) internal successors, (952), 5 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:52,600 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:52,601 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] [2022-07-13 21:56:52,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:56:52,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:56:52,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:52,601 INFO L85 PathProgramCache]: Analyzing trace with hash -880355715, now seen corresponding path program 1 times [2022-07-13 21:56:52,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:52,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902978048] [2022-07-13 21:56:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:52,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:56:52,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:52,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902978048] [2022-07-13 21:56:52,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902978048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:52,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:52,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:56:52,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698921505] [2022-07-13 21:56:52,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:52,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:56:52,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:56:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:56:52,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 242 [2022-07-13 21:56:52,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 230 transitions, 643 flow. Second operand has 5 states, 5 states have (on average 190.6) internal successors, (953), 5 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:52,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:52,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 242 [2022-07-13 21:56:52,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:06,642 INFO L129 PetriNetUnfolder]: 21985/103372 cut-off events. [2022-07-13 21:57:06,643 INFO L130 PetriNetUnfolder]: For 39159/40921 co-relation queries the response was YES. [2022-07-13 21:57:07,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155783 conditions, 103372 events. 21985/103372 cut-off events. For 39159/40921 co-relation queries the response was YES. Maximal size of possible extension queue 2510. Compared 1647085 event pairs, 6891 based on Foata normal form. 159/96510 useless extension candidates. Maximal degree in co-relation 114356. Up to 13234 conditions per place. [2022-07-13 21:57:08,393 INFO L132 encePairwiseOnDemand]: 236/242 looper letters, 95 selfloop transitions, 32 changer transitions 0/322 dead transitions. [2022-07-13 21:57:08,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 322 transitions, 1369 flow [2022-07-13 21:57:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:57:08,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:57:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1617 transitions. [2022-07-13 21:57:08,396 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8352272727272727 [2022-07-13 21:57:08,396 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1617 transitions. [2022-07-13 21:57:08,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1617 transitions. [2022-07-13 21:57:08,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:08,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1617 transitions. [2022-07-13 21:57:08,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.125) internal successors, (1617), 8 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:08,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 242.0) internal successors, (2178), 9 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:08,402 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 242.0) internal successors, (2178), 9 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:08,402 INFO L186 Difference]: Start difference. First operand has 240 places, 230 transitions, 643 flow. Second operand 8 states and 1617 transitions. [2022-07-13 21:57:08,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 322 transitions, 1369 flow [2022-07-13 21:57:08,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 322 transitions, 1369 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:08,559 INFO L242 Difference]: Finished difference. Result has 251 places, 252 transitions, 929 flow [2022-07-13 21:57:08,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=251, PETRI_TRANSITIONS=252} [2022-07-13 21:57:08,560 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 29 predicate places. [2022-07-13 21:57:08,560 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 252 transitions, 929 flow [2022-07-13 21:57:08,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.6) internal successors, (953), 5 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:08,560 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:08,561 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, 1, 1, 1, 1, 1] [2022-07-13 21:57:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:57:08,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:57:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1008449093, now seen corresponding path program 1 times [2022-07-13 21:57:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:08,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631421326] [2022-07-13 21:57:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:08,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:08,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631421326] [2022-07-13 21:57:08,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631421326] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:08,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138032287] [2022-07-13 21:57:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:08,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:08,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:08,593 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:08,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:57:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:08,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:08,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:08,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:08,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138032287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:08,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:08,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:08,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461190717] [2022-07-13 21:57:08,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:08,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:08,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:08,781 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 242 [2022-07-13 21:57:08,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 252 transitions, 929 flow. Second operand has 10 states, 10 states have (on average 197.3) internal successors, (1973), 10 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:08,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:08,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 242 [2022-07-13 21:57:08,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:10,602 INFO L129 PetriNetUnfolder]: 1032/13328 cut-off events. [2022-07-13 21:57:10,602 INFO L130 PetriNetUnfolder]: For 5432/5618 co-relation queries the response was YES. [2022-07-13 21:57:10,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17193 conditions, 13328 events. 1032/13328 cut-off events. For 5432/5618 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 170101 event pairs, 333 based on Foata normal form. 6/12575 useless extension candidates. Maximal degree in co-relation 11078. Up to 1191 conditions per place. [2022-07-13 21:57:10,719 INFO L132 encePairwiseOnDemand]: 236/242 looper letters, 20 selfloop transitions, 9 changer transitions 0/263 dead transitions. [2022-07-13 21:57:10,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 263 transitions, 1009 flow [2022-07-13 21:57:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1787 transitions. [2022-07-13 21:57:10,722 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8204775022956842 [2022-07-13 21:57:10,722 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1787 transitions. [2022-07-13 21:57:10,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1787 transitions. [2022-07-13 21:57:10,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:10,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1787 transitions. [2022-07-13 21:57:10,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.55555555555554) internal successors, (1787), 9 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:10,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 242.0) internal successors, (2420), 10 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:10,729 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 242.0) internal successors, (2420), 10 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:10,729 INFO L186 Difference]: Start difference. First operand has 251 places, 252 transitions, 929 flow. Second operand 9 states and 1787 transitions. [2022-07-13 21:57:10,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 263 transitions, 1009 flow [2022-07-13 21:57:10,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 263 transitions, 1009 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:10,743 INFO L242 Difference]: Finished difference. Result has 263 places, 259 transitions, 983 flow [2022-07-13 21:57:10,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=983, PETRI_PLACES=263, PETRI_TRANSITIONS=259} [2022-07-13 21:57:10,744 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 41 predicate places. [2022-07-13 21:57:10,745 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 259 transitions, 983 flow [2022-07-13 21:57:10,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 197.3) internal successors, (1973), 10 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:10,746 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:10,746 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:10,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 21:57:10,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 21:57:10,960 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:57:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash -577410671, now seen corresponding path program 1 times [2022-07-13 21:57:10,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:10,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685501709] [2022-07-13 21:57:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:10,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 21:57:11,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:11,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685501709] [2022-07-13 21:57:11,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685501709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:11,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:11,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:57:11,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998461530] [2022-07-13 21:57:11,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:57:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:57:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:57:11,022 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 242 [2022-07-13 21:57:11,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 259 transitions, 983 flow. Second operand has 5 states, 5 states have (on average 190.8) internal successors, (954), 5 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:11,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:11,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 242 [2022-07-13 21:57:11,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand