./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 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_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-?-6c24879 [2022-07-12 10:16:12,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:16:12,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:16:12,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:16:12,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:16:12,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:16:12,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:16:12,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:16:12,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:16:12,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:16:12,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:16:12,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:16:12,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:16:12,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:16:12,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:16:12,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:16:12,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:16:12,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:16:12,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:16:12,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:16:12,517 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:16:12,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:16:12,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:16:12,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:16:12,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:16:12,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:16:12,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:16:12,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:16:12,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:16:12,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:16:12,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:16:12,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:16:12,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:16:12,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:16:12,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:16:12,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:16:12,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:16:12,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:16:12,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:16:12,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:16:12,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:16:12,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:16:12,536 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:16:12,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:16:12,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:16:12,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:16:12,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:16:12,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:16:12,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:16:12,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:16:12,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:16:12,561 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:16:12,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:16:12,562 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:16:12,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:16:12,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:16:12,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:16:12,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:16:12,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:16:12,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:16:12,563 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:16:12,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:16:12,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:16:12,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:16:12,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:16:12,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:16:12,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:16:12,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:16:12,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:16:12,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:16:12,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:16:12,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:16:12,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:16:12,565 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:16:12,565 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:16:12,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:16:12,565 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2022-07-12 10:16:12,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:16:12,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:16:12,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:16:12,774 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:16:12,774 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:16:12,775 INFO L432 ainManager$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 [2022-07-12 10:16:12,838 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d0a627dc/d7d4533eee13433cb80bf087f24f93af/FLAG38e7ac778 [2022-07-12 10:16:13,250 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:16:13,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2022-07-12 10:16:13,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d0a627dc/d7d4533eee13433cb80bf087f24f93af/FLAG38e7ac778 [2022-07-12 10:16:13,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d0a627dc/d7d4533eee13433cb80bf087f24f93af [2022-07-12 10:16:13,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:16:13,272 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:16:13,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:16:13,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:16:13,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:16:13,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a741c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13, skipping insertion in model container [2022-07-12 10:16:13,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:16:13,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:16:13,514 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] [2022-07-12 10:16:13,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:16:13,553 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:16:13,591 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] [2022-07-12 10:16:13,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:16:13,621 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:16:13,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13 WrapperNode [2022-07-12 10:16:13,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:16:13,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:16:13,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:16:13,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:16:13,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,678 INFO L137 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-07-12 10:16:13,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:16:13,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:16:13,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:16:13,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:16:13,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:16:13,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:16:13,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:16:13,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:16:13,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (1/1) ... [2022-07-12 10:16:13,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:16:13,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:13,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:16:13,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:16:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:16:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:16:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:16:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:16:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:16:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:16:13,766 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:16:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:16:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:16:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:16:13,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:16:13,768 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:16:13,873 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:16:13,880 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:16:14,041 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:16:14,047 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:16:14,047 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-12 10:16:14,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:16:14 BoogieIcfgContainer [2022-07-12 10:16:14,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:16:14,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:16:14,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:16:14,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:16:14,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:16:13" (1/3) ... [2022-07-12 10:16:14,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bcfc8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:16:14, skipping insertion in model container [2022-07-12 10:16:14,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:13" (2/3) ... [2022-07-12 10:16:14,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bcfc8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:16:14, skipping insertion in model container [2022-07-12 10:16:14,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:16:14" (3/3) ... [2022-07-12 10:16:14,054 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2022-07-12 10:16:14,066 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:16:14,072 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:16:14,072 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:16:14,073 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:16:14,104 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:16:14,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 146 transitions, 300 flow [2022-07-12 10:16:14,170 INFO L129 PetriNetUnfolder]: 26/222 cut-off events. [2022-07-12 10:16:14,170 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:16:14,174 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. [2022-07-12 10:16:14,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 146 transitions, 300 flow [2022-07-12 10:16:14,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 141 transitions, 287 flow [2022-07-12 10:16:14,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:14,189 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@59080c9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c243bb0 [2022-07-12 10:16:14,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:16:14,203 INFO L129 PetriNetUnfolder]: 5/102 cut-off events. [2022-07-12 10:16:14,203 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:14,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:14,204 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] [2022-07-12 10:16:14,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:16:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash 150697490, now seen corresponding path program 1 times [2022-07-12 10:16:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:14,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382599402] [2022-07-12 10:16:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:14,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:14,340 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:14,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:14,408 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:14,409 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-12 10:16:14,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-12 10:16:14,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-12 10:16:14,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:16:14,412 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:16:14,419 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:14,419 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:16:14,451 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:16:14,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 170 transitions, 358 flow [2022-07-12 10:16:14,511 INFO L129 PetriNetUnfolder]: 43/347 cut-off events. [2022-07-12 10:16:14,511 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:16:14,515 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. [2022-07-12 10:16:14,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 170 transitions, 358 flow [2022-07-12 10:16:14,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 170 transitions, 358 flow [2022-07-12 10:16:14,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:14,523 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@59080c9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c243bb0 [2022-07-12 10:16:14,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:16:14,535 INFO L129 PetriNetUnfolder]: 7/113 cut-off events. [2022-07-12 10:16:14,535 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:16:14,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:14,536 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] [2022-07-12 10:16:14,536 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)] === [2022-07-12 10:16:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:14,537 INFO L85 PathProgramCache]: Analyzing trace with hash -845533704, now seen corresponding path program 1 times [2022-07-12 10:16:14,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:14,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113665120] [2022-07-12 10:16:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:14,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:14,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:14,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113665120] [2022-07-12 10:16:14,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113665120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:14,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:14,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:16:14,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901639415] [2022-07-12 10:16:14,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:14,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:16:14,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:16:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:16:14,757 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 170 [2022-07-12 10:16:14,761 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) [2022-07-12 10:16:14,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:14,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 170 [2022-07-12 10:16:14,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:15,045 INFO L129 PetriNetUnfolder]: 220/1706 cut-off events. [2022-07-12 10:16:15,045 INFO L130 PetriNetUnfolder]: For 125/147 co-relation queries the response was YES. [2022-07-12 10:16:15,049 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. [2022-07-12 10:16:15,052 INFO L132 encePairwiseOnDemand]: 149/170 looper letters, 43 selfloop transitions, 8 changer transitions 5/194 dead transitions. [2022-07-12 10:16:15,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 194 transitions, 552 flow [2022-07-12 10:16:15,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:16:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:16:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1236 transitions. [2022-07-12 10:16:15,067 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9088235294117647 [2022-07-12 10:16:15,068 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1236 transitions. [2022-07-12 10:16:15,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1236 transitions. [2022-07-12 10:16:15,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:15,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1236 transitions. [2022-07-12 10:16:15,080 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) [2022-07-12 10:16:15,087 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) [2022-07-12 10:16:15,087 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) [2022-07-12 10:16:15,089 INFO L186 Difference]: Start difference. First operand has 156 places, 170 transitions, 358 flow. Second operand 8 states and 1236 transitions. [2022-07-12 10:16:15,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 194 transitions, 552 flow [2022-07-12 10:16:15,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 194 transitions, 552 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:15,098 INFO L242 Difference]: Finished difference. Result has 166 places, 160 transitions, 383 flow [2022-07-12 10:16:15,099 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} [2022-07-12 10:16:15,106 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 10 predicate places. [2022-07-12 10:16:15,106 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 160 transitions, 383 flow [2022-07-12 10:16:15,107 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) [2022-07-12 10:16:15,107 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:15,108 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] [2022-07-12 10:16:15,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:16:15,108 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)] === [2022-07-12 10:16:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash 357930258, now seen corresponding path program 1 times [2022-07-12 10:16:15,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:15,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154673970] [2022-07-12 10:16:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:15,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:15,151 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:15,170 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:15,170 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:15,170 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-12 10:16:15,170 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-12 10:16:15,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-12 10:16:15,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-12 10:16:15,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:16:15,179 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:16:15,180 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:15,180 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:16:15,194 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:16:15,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 178 places, 194 transitions, 418 flow [2022-07-12 10:16:15,236 INFO L129 PetriNetUnfolder]: 65/505 cut-off events. [2022-07-12 10:16:15,237 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:16:15,239 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. [2022-07-12 10:16:15,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 194 transitions, 418 flow [2022-07-12 10:16:15,244 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 194 transitions, 418 flow [2022-07-12 10:16:15,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:15,247 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@59080c9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c243bb0 [2022-07-12 10:16:15,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:16:15,256 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2022-07-12 10:16:15,256 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:16:15,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:15,256 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:15,256 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)] === [2022-07-12 10:16:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:15,257 INFO L85 PathProgramCache]: Analyzing trace with hash 612409166, now seen corresponding path program 1 times [2022-07-12 10:16:15,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:15,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314148331] [2022-07-12 10:16:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:15,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:15,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:15,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314148331] [2022-07-12 10:16:15,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314148331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:15,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:15,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:16:15,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459747396] [2022-07-12 10:16:15,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:15,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:16:15,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:15,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:16:15,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:16:15,371 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 194 [2022-07-12 10:16:15,372 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) [2022-07-12 10:16:15,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:15,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 194 [2022-07-12 10:16:15,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:15,894 INFO L129 PetriNetUnfolder]: 749/4353 cut-off events. [2022-07-12 10:16:15,895 INFO L130 PetriNetUnfolder]: For 552/611 co-relation queries the response was YES. [2022-07-12 10:16:15,906 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. [2022-07-12 10:16:15,919 INFO L132 encePairwiseOnDemand]: 170/194 looper letters, 65 selfloop transitions, 8 changer transitions 0/228 dead transitions. [2022-07-12 10:16:15,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 228 transitions, 698 flow [2022-07-12 10:16:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:16:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:16:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1410 transitions. [2022-07-12 10:16:15,922 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9085051546391752 [2022-07-12 10:16:15,922 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1410 transitions. [2022-07-12 10:16:15,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1410 transitions. [2022-07-12 10:16:15,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:15,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1410 transitions. [2022-07-12 10:16:15,925 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) [2022-07-12 10:16:15,927 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) [2022-07-12 10:16:15,928 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) [2022-07-12 10:16:15,928 INFO L186 Difference]: Start difference. First operand has 178 places, 194 transitions, 418 flow. Second operand 8 states and 1410 transitions. [2022-07-12 10:16:15,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 228 transitions, 698 flow [2022-07-12 10:16:15,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 228 transitions, 698 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:15,933 INFO L242 Difference]: Finished difference. Result has 187 places, 180 transitions, 435 flow [2022-07-12 10:16:15,933 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} [2022-07-12 10:16:15,934 INFO L279 CegarLoopForPetriNet]: 178 programPoint places, 9 predicate places. [2022-07-12 10:16:15,934 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 180 transitions, 435 flow [2022-07-12 10:16:15,934 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) [2022-07-12 10:16:15,935 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:15,935 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] [2022-07-12 10:16:15,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:16:15,935 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)] === [2022-07-12 10:16:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1226980834, now seen corresponding path program 1 times [2022-07-12 10:16:15,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:15,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433704726] [2022-07-12 10:16:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:15,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:16:15,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:15,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433704726] [2022-07-12 10:16:15,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433704726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:15,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:15,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:16:15,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907337186] [2022-07-12 10:16:15,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:15,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:16:15,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:15,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:16:15,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:16:15,985 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 194 [2022-07-12 10:16:15,986 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) [2022-07-12 10:16:15,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:15,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 194 [2022-07-12 10:16:15,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:16,851 INFO L129 PetriNetUnfolder]: 1227/7849 cut-off events. [2022-07-12 10:16:16,853 INFO L130 PetriNetUnfolder]: For 2034/2198 co-relation queries the response was YES. [2022-07-12 10:16:16,876 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. [2022-07-12 10:16:16,899 INFO L132 encePairwiseOnDemand]: 188/194 looper letters, 63 selfloop transitions, 14 changer transitions 0/235 dead transitions. [2022-07-12 10:16:16,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 235 transitions, 809 flow [2022-07-12 10:16:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:16:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:16:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1313 transitions. [2022-07-12 10:16:16,902 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8460051546391752 [2022-07-12 10:16:16,902 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1313 transitions. [2022-07-12 10:16:16,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1313 transitions. [2022-07-12 10:16:16,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:16,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1313 transitions. [2022-07-12 10:16:16,906 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) [2022-07-12 10:16:16,908 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) [2022-07-12 10:16:16,909 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) [2022-07-12 10:16:16,909 INFO L186 Difference]: Start difference. First operand has 187 places, 180 transitions, 435 flow. Second operand 8 states and 1313 transitions. [2022-07-12 10:16:16,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 235 transitions, 809 flow [2022-07-12 10:16:16,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 235 transitions, 809 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:16,920 INFO L242 Difference]: Finished difference. Result has 198 places, 190 transitions, 533 flow [2022-07-12 10:16:16,920 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} [2022-07-12 10:16:16,922 INFO L279 CegarLoopForPetriNet]: 178 programPoint places, 20 predicate places. [2022-07-12 10:16:16,922 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 190 transitions, 533 flow [2022-07-12 10:16:16,922 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) [2022-07-12 10:16:16,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:16,923 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] [2022-07-12 10:16:16,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:16:16,923 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)] === [2022-07-12 10:16:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1926628457, now seen corresponding path program 1 times [2022-07-12 10:16:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:16,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102946811] [2022-07-12 10:16:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:16,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:16,950 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:16,980 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:16,980 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:16,980 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:16:16,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:16:16,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-12 10:16:16,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:16:16,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:16:16,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:16:16,981 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:16:16,982 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:16,982 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:16:17,003 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:16:17,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 200 places, 218 transitions, 480 flow [2022-07-12 10:16:17,048 INFO L129 PetriNetUnfolder]: 99/731 cut-off events. [2022-07-12 10:16:17,048 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-12 10:16:17,052 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. [2022-07-12 10:16:17,052 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 218 transitions, 480 flow [2022-07-12 10:16:17,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 218 transitions, 480 flow [2022-07-12 10:16:17,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:17,056 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@59080c9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c243bb0 [2022-07-12 10:16:17,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:16:17,060 INFO L129 PetriNetUnfolder]: 5/109 cut-off events. [2022-07-12 10:16:17,061 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:16:17,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:17,061 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] [2022-07-12 10:16:17,061 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)] === [2022-07-12 10:16:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:17,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1855384498, now seen corresponding path program 1 times [2022-07-12 10:16:17,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:17,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137904998] [2022-07-12 10:16:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:17,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:17,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:17,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137904998] [2022-07-12 10:16:17,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137904998] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:17,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:17,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:16:17,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451892218] [2022-07-12 10:16:17,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:17,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:16:17,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:17,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:16:17,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:16:17,126 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 218 [2022-07-12 10:16:17,127 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) [2022-07-12 10:16:17,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:17,127 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 218 [2022-07-12 10:16:17,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:18,329 INFO L129 PetriNetUnfolder]: 2370/11346 cut-off events. [2022-07-12 10:16:18,330 INFO L130 PetriNetUnfolder]: For 2245/2388 co-relation queries the response was YES. [2022-07-12 10:16:18,375 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. [2022-07-12 10:16:18,465 INFO L132 encePairwiseOnDemand]: 191/218 looper letters, 82 selfloop transitions, 8 changer transitions 0/262 dead transitions. [2022-07-12 10:16:18,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 262 transitions, 850 flow [2022-07-12 10:16:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:16:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:16:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1584 transitions. [2022-07-12 10:16:18,468 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.908256880733945 [2022-07-12 10:16:18,469 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1584 transitions. [2022-07-12 10:16:18,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1584 transitions. [2022-07-12 10:16:18,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:18,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1584 transitions. [2022-07-12 10:16:18,472 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) [2022-07-12 10:16:18,474 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) [2022-07-12 10:16:18,474 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) [2022-07-12 10:16:18,475 INFO L186 Difference]: Start difference. First operand has 200 places, 218 transitions, 480 flow. Second operand 8 states and 1584 transitions. [2022-07-12 10:16:18,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 262 transitions, 850 flow [2022-07-12 10:16:18,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 262 transitions, 850 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:18,479 INFO L242 Difference]: Finished difference. Result has 208 places, 200 transitions, 489 flow [2022-07-12 10:16:18,479 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} [2022-07-12 10:16:18,480 INFO L279 CegarLoopForPetriNet]: 200 programPoint places, 8 predicate places. [2022-07-12 10:16:18,480 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 200 transitions, 489 flow [2022-07-12 10:16:18,480 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) [2022-07-12 10:16:18,480 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:18,481 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] [2022-07-12 10:16:18,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:16:18,481 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)] === [2022-07-12 10:16:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1616348364, now seen corresponding path program 1 times [2022-07-12 10:16:18,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:18,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756146806] [2022-07-12 10:16:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:18,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:16:18,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756146806] [2022-07-12 10:16:18,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756146806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:18,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:18,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:16:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721403872] [2022-07-12 10:16:18,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:18,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:16:18,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:16:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:16:18,527 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 218 [2022-07-12 10:16:18,528 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) [2022-07-12 10:16:18,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:18,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 218 [2022-07-12 10:16:18,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:20,858 INFO L129 PetriNetUnfolder]: 4080/21139 cut-off events. [2022-07-12 10:16:20,859 INFO L130 PetriNetUnfolder]: For 6209/6628 co-relation queries the response was YES. [2022-07-12 10:16:20,974 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. [2022-07-12 10:16:21,059 INFO L132 encePairwiseOnDemand]: 212/218 looper letters, 80 selfloop transitions, 14 changer transitions 0/269 dead transitions. [2022-07-12 10:16:21,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 269 transitions, 961 flow [2022-07-12 10:16:21,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:16:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:16:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1466 transitions. [2022-07-12 10:16:21,062 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8405963302752294 [2022-07-12 10:16:21,062 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1466 transitions. [2022-07-12 10:16:21,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1466 transitions. [2022-07-12 10:16:21,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:21,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1466 transitions. [2022-07-12 10:16:21,066 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) [2022-07-12 10:16:21,068 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) [2022-07-12 10:16:21,069 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) [2022-07-12 10:16:21,069 INFO L186 Difference]: Start difference. First operand has 208 places, 200 transitions, 489 flow. Second operand 8 states and 1466 transitions. [2022-07-12 10:16:21,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 269 transitions, 961 flow [2022-07-12 10:16:21,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 269 transitions, 961 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:21,086 INFO L242 Difference]: Finished difference. Result has 219 places, 210 transitions, 587 flow [2022-07-12 10:16:21,086 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} [2022-07-12 10:16:21,088 INFO L279 CegarLoopForPetriNet]: 200 programPoint places, 19 predicate places. [2022-07-12 10:16:21,088 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 210 transitions, 587 flow [2022-07-12 10:16:21,088 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) [2022-07-12 10:16:21,088 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:21,089 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] [2022-07-12 10:16:21,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:16:21,089 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)] === [2022-07-12 10:16:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:21,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1324240171, now seen corresponding path program 1 times [2022-07-12 10:16:21,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:21,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47648369] [2022-07-12 10:16:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:16:21,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:21,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47648369] [2022-07-12 10:16:21,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47648369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:21,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:21,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:16:21,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094271769] [2022-07-12 10:16:21,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:21,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:16:21,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:21,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:16:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:16:21,188 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 218 [2022-07-12 10:16:21,190 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) [2022-07-12 10:16:21,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:21,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 218 [2022-07-12 10:16:21,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:25,461 INFO L129 PetriNetUnfolder]: 6543/37417 cut-off events. [2022-07-12 10:16:25,462 INFO L130 PetriNetUnfolder]: For 12659/13406 co-relation queries the response was YES. [2022-07-12 10:16:25,685 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. [2022-07-12 10:16:25,837 INFO L132 encePairwiseOnDemand]: 212/218 looper letters, 76 selfloop transitions, 32 changer transitions 2/288 dead transitions. [2022-07-12 10:16:25,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 288 transitions, 1211 flow [2022-07-12 10:16:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:16:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:16:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1464 transitions. [2022-07-12 10:16:25,843 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8394495412844036 [2022-07-12 10:16:25,843 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1464 transitions. [2022-07-12 10:16:25,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1464 transitions. [2022-07-12 10:16:25,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:25,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1464 transitions. [2022-07-12 10:16:25,846 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) [2022-07-12 10:16:25,848 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) [2022-07-12 10:16:25,848 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) [2022-07-12 10:16:25,848 INFO L186 Difference]: Start difference. First operand has 219 places, 210 transitions, 587 flow. Second operand 8 states and 1464 transitions. [2022-07-12 10:16:25,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 288 transitions, 1211 flow [2022-07-12 10:16:25,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 288 transitions, 1211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:25,895 INFO L242 Difference]: Finished difference. Result has 230 places, 232 transitions, 873 flow [2022-07-12 10:16:25,896 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} [2022-07-12 10:16:25,897 INFO L279 CegarLoopForPetriNet]: 200 programPoint places, 30 predicate places. [2022-07-12 10:16:25,897 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 232 transitions, 873 flow [2022-07-12 10:16:25,898 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) [2022-07-12 10:16:25,898 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:25,898 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] [2022-07-12 10:16:25,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:16:25,898 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)] === [2022-07-12 10:16:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:25,899 INFO L85 PathProgramCache]: Analyzing trace with hash 725009633, now seen corresponding path program 1 times [2022-07-12 10:16:25,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:25,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578769118] [2022-07-12 10:16:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:25,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:25,920 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:25,953 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:25,954 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:25,954 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-12 10:16:25,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-12 10:16:25,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-12 10:16:25,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-12 10:16:25,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-12 10:16:25,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-12 10:16:25,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:16:25,956 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:16:25,957 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:25,957 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:16:25,984 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-12 10:16:25,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 222 places, 242 transitions, 544 flow [2022-07-12 10:16:26,213 INFO L129 PetriNetUnfolder]: 161/1097 cut-off events. [2022-07-12 10:16:26,213 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-12 10:16:26,219 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. [2022-07-12 10:16:26,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 242 transitions, 544 flow [2022-07-12 10:16:26,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 242 transitions, 544 flow [2022-07-12 10:16:26,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:26,228 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@59080c9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c243bb0 [2022-07-12 10:16:26,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:16:26,231 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2022-07-12 10:16:26,231 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:16:26,232 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:26,232 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] [2022-07-12 10:16:26,232 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)] === [2022-07-12 10:16:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash -326303070, now seen corresponding path program 1 times [2022-07-12 10:16:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:26,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258581305] [2022-07-12 10:16:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:26,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258581305] [2022-07-12 10:16:26,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258581305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:26,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:26,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:16:26,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881577977] [2022-07-12 10:16:26,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:26,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:16:26,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:26,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:16:26,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:16:26,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 242 [2022-07-12 10:16:26,282 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) [2022-07-12 10:16:26,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:26,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 242 [2022-07-12 10:16:26,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:29,331 INFO L129 PetriNetUnfolder]: 7221/28496 cut-off events. [2022-07-12 10:16:29,331 INFO L130 PetriNetUnfolder]: For 7865/8196 co-relation queries the response was YES. [2022-07-12 10:16:29,532 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. [2022-07-12 10:16:29,662 INFO L132 encePairwiseOnDemand]: 212/242 looper letters, 99 selfloop transitions, 8 changer transitions 0/296 dead transitions. [2022-07-12 10:16:29,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 296 transitions, 1008 flow [2022-07-12 10:16:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:16:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:16:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1758 transitions. [2022-07-12 10:16:29,666 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9080578512396694 [2022-07-12 10:16:29,666 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1758 transitions. [2022-07-12 10:16:29,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1758 transitions. [2022-07-12 10:16:29,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:29,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1758 transitions. [2022-07-12 10:16:29,670 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) [2022-07-12 10:16:29,672 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) [2022-07-12 10:16:29,673 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) [2022-07-12 10:16:29,673 INFO L186 Difference]: Start difference. First operand has 222 places, 242 transitions, 544 flow. Second operand 8 states and 1758 transitions. [2022-07-12 10:16:29,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 296 transitions, 1008 flow [2022-07-12 10:16:29,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 296 transitions, 1008 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:29,681 INFO L242 Difference]: Finished difference. Result has 229 places, 220 transitions, 545 flow [2022-07-12 10:16:29,681 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} [2022-07-12 10:16:29,682 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 7 predicate places. [2022-07-12 10:16:29,682 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 220 transitions, 545 flow [2022-07-12 10:16:29,682 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) [2022-07-12 10:16:29,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:29,682 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] [2022-07-12 10:16:29,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:16:29,683 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)] === [2022-07-12 10:16:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:29,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2030427744, now seen corresponding path program 1 times [2022-07-12 10:16:29,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:29,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413299121] [2022-07-12 10:16:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:29,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:16:29,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:29,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413299121] [2022-07-12 10:16:29,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413299121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:29,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:29,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:16:29,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291450232] [2022-07-12 10:16:29,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:29,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:16:29,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:29,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:16:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:16:29,726 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 242 [2022-07-12 10:16:29,727 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) [2022-07-12 10:16:29,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:29,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 242 [2022-07-12 10:16:29,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:36,979 INFO L129 PetriNetUnfolder]: 12758/55508 cut-off events. [2022-07-12 10:16:36,979 INFO L130 PetriNetUnfolder]: For 19771/20707 co-relation queries the response was YES. [2022-07-12 10:16:37,365 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. [2022-07-12 10:16:37,602 INFO L132 encePairwiseOnDemand]: 236/242 looper letters, 97 selfloop transitions, 14 changer transitions 0/303 dead transitions. [2022-07-12 10:16:37,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 303 transitions, 1119 flow [2022-07-12 10:16:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:16:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:16:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1619 transitions. [2022-07-12 10:16:37,605 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8362603305785123 [2022-07-12 10:16:37,605 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1619 transitions. [2022-07-12 10:16:37,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1619 transitions. [2022-07-12 10:16:37,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:37,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1619 transitions. [2022-07-12 10:16:37,609 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) [2022-07-12 10:16:37,611 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) [2022-07-12 10:16:37,611 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) [2022-07-12 10:16:37,612 INFO L186 Difference]: Start difference. First operand has 229 places, 220 transitions, 545 flow. Second operand 8 states and 1619 transitions. [2022-07-12 10:16:37,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 303 transitions, 1119 flow [2022-07-12 10:16:37,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 303 transitions, 1119 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:37,651 INFO L242 Difference]: Finished difference. Result has 240 places, 230 transitions, 643 flow [2022-07-12 10:16:37,651 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} [2022-07-12 10:16:37,653 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 18 predicate places. [2022-07-12 10:16:37,653 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 230 transitions, 643 flow [2022-07-12 10:16:37,654 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) [2022-07-12 10:16:37,654 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:37,654 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] [2022-07-12 10:16:37,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:16:37,655 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)] === [2022-07-12 10:16:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash -880355715, now seen corresponding path program 1 times [2022-07-12 10:16:37,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:37,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323360832] [2022-07-12 10:16:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:16:37,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:37,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323360832] [2022-07-12 10:16:37,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323360832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:37,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:37,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:16:37,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903260125] [2022-07-12 10:16:37,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:37,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:16:37,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:16:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:16:37,713 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 242 [2022-07-12 10:16:37,713 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) [2022-07-12 10:16:37,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:37,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 242 [2022-07-12 10:16:37,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand