./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/25_stack_longest-2.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/pthread-ext/25_stack_longest-2.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 93834d0ed7ae29f55a5cf3676a6d16497c83e10891cd8a2ab18e9898a90eaebc --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:02:10,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:02:10,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:02:10,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:02:10,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:02:10,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:02:10,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:02:10,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:02:10,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:02:10,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:02:10,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:02:10,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:02:10,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:02:10,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:02:10,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:02:10,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:02:10,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:02:10,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:02:10,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:02:10,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:02:10,735 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:02:10,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:02:10,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:02:10,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:02:10,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:02:10,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:02:10,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:02:10,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:02:10,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:02:10,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:02:10,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:02:10,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:02:10,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:02:10,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:02:10,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:02:10,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:02:10,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:02:10,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:02:10,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:02:10,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:02:10,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:02:10,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:02:10,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:02:10,773 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:02:10,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:02:10,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:02:10,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:02:10,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:02:10,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:02:10,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:02:10,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:02:10,776 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:02:10,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:02:10,777 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:02:10,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:02:10,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:02:10,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:02:10,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:02:10,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:02:10,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:02:10,778 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:02:10,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:02:10,778 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:02:10,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:02:10,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:02:10,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:02:10,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:02:10,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:02:10,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:02:10,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:02:10,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:02:10,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:02:10,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:02:10,780 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:02:10,780 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:02:10,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:02:10,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93834d0ed7ae29f55a5cf3676a6d16497c83e10891cd8a2ab18e9898a90eaebc [2022-07-12 10:02:10,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:02:10,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:02:10,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:02:10,992 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:02:10,993 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:02:10,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2022-07-12 10:02:11,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215955a73/0e29a5023d344a94b1cffd9211cfd03e/FLAGca33e7892 [2022-07-12 10:02:11,414 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:02:11,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2022-07-12 10:02:11,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215955a73/0e29a5023d344a94b1cffd9211cfd03e/FLAGca33e7892 [2022-07-12 10:02:11,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215955a73/0e29a5023d344a94b1cffd9211cfd03e [2022-07-12 10:02:11,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:02:11,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:02:11,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:02:11,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:02:11,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:02:11,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:02:11" (1/1) ... [2022-07-12 10:02:11,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63bdf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:11, skipping insertion in model container [2022-07-12 10:02:11,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:02:11" (1/1) ... [2022-07-12 10:02:11,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:02:11,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:02:12,073 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31043,31056] [2022-07-12 10:02:12,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:02:12,094 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:02:12,130 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31043,31056] [2022-07-12 10:02:12,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:02:12,160 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:02:12,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12 WrapperNode [2022-07-12 10:02:12,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:02:12,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:02:12,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:02:12,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:02:12,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (1/1) ... [2022-07-12 10:02:12,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (1/1) ... [2022-07-12 10:02:12,203 INFO L137 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 172 [2022-07-12 10:02:12,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:02:12,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:02:12,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:02:12,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:02:12,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (1/1) ... [2022-07-12 10:02:12,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (1/1) ... [2022-07-12 10:02:12,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (1/1) ... [2022-07-12 10:02:12,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (1/1) ... [2022-07-12 10:02:12,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (1/1) ... [2022-07-12 10:02:12,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (1/1) ... [2022-07-12 10:02:12,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (1/1) ... [2022-07-12 10:02:12,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:02:12,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:02:12,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:02:12,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:02:12,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (1/1) ... [2022-07-12 10:02:12,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:02:12,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:02:12,250 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 10:02:12,255 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 10:02:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:02:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-12 10:02:12,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-12 10:02:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:02:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:02:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:02:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:02:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:02:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:02:12,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:02:12,287 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 10:02:12,387 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:02:12,388 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:02:12,657 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:02:12,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:02:12,769 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:02:12,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:02:12 BoogieIcfgContainer [2022-07-12 10:02:12,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:02:12,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:02:12,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:02:12,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:02:12,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:02:11" (1/3) ... [2022-07-12 10:02:12,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510cbebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:02:12, skipping insertion in model container [2022-07-12 10:02:12,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:02:12" (2/3) ... [2022-07-12 10:02:12,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510cbebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:02:12, skipping insertion in model container [2022-07-12 10:02:12,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:02:12" (3/3) ... [2022-07-12 10:02:12,779 INFO L111 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-2.i [2022-07-12 10:02:12,786 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:02:12,793 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:02:12,793 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:02:12,794 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:02:12,854 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:02:12,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 102 places, 106 transitions, 217 flow [2022-07-12 10:02:12,914 INFO L129 PetriNetUnfolder]: 8/117 cut-off events. [2022-07-12 10:02:12,914 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:02:12,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 117 events. 8/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 114 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-07-12 10:02:12,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 106 transitions, 217 flow [2022-07-12 10:02:12,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 106 transitions, 217 flow [2022-07-12 10:02:12,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:02:12,936 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@415a39c7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e14438d [2022-07-12 10:02:12,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:02:12,948 INFO L129 PetriNetUnfolder]: 3/60 cut-off events. [2022-07-12 10:02:12,948 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:02:12,949 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:12,949 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] [2022-07-12 10:02:12,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:02:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:12,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1261933473, now seen corresponding path program 1 times [2022-07-12 10:02:12,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:12,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812371742] [2022-07-12 10:02:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:12,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:13,076 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:02:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:13,134 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:02:13,136 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:02:13,137 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-12 10:02:13,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-12 10:02:13,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-12 10:02:13,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:02:13,140 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:02:13,146 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:02:13,146 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:02:13,207 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:02:13,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 167 places, 175 transitions, 362 flow [2022-07-12 10:02:13,277 INFO L129 PetriNetUnfolder]: 15/199 cut-off events. [2022-07-12 10:02:13,277 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:02:13,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 378 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-07-12 10:02:13,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 175 transitions, 362 flow [2022-07-12 10:02:13,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 175 transitions, 362 flow [2022-07-12 10:02:13,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:02:13,289 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@415a39c7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e14438d [2022-07-12 10:02:13,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:02:13,315 INFO L129 PetriNetUnfolder]: 7/101 cut-off events. [2022-07-12 10:02:13,317 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:02:13,317 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:13,317 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:13,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-12 10:02:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:13,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1656669066, now seen corresponding path program 1 times [2022-07-12 10:02:13,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:13,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538622264] [2022-07-12 10:02:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:13,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:13,361 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:02:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:13,382 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:02:13,382 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:02:13,382 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-12 10:02:13,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-12 10:02:13,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-12 10:02:13,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-12 10:02:13,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:02:13,383 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:02:13,384 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:02:13,384 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:02:13,434 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:02:13,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 232 places, 244 transitions, 509 flow [2022-07-12 10:02:13,481 INFO L129 PetriNetUnfolder]: 22/281 cut-off events. [2022-07-12 10:02:13,482 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:02:13,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 281 events. 22/281 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 741 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-07-12 10:02:13,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 244 transitions, 509 flow [2022-07-12 10:02:13,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 244 transitions, 509 flow [2022-07-12 10:02:13,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:02:13,496 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@415a39c7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e14438d [2022-07-12 10:02:13,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:02:13,508 INFO L129 PetriNetUnfolder]: 11/146 cut-off events. [2022-07-12 10:02:13,509 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:02:13,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:13,510 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:13,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:02:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash 642993667, now seen corresponding path program 1 times [2022-07-12 10:02:13,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:13,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639567076] [2022-07-12 10:02:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:13,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:13,545 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:02:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:13,583 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:02:13,584 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:02:13,584 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:02:13,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:02:13,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-12 10:02:13,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:02:13,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:02:13,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:02:13,585 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:02:13,586 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:02:13,586 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:02:13,650 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:02:13,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 297 places, 313 transitions, 658 flow [2022-07-12 10:02:13,731 INFO L129 PetriNetUnfolder]: 29/363 cut-off events. [2022-07-12 10:02:13,731 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:02:13,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 363 events. 29/363 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1162 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 289. Up to 10 conditions per place. [2022-07-12 10:02:13,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 297 places, 313 transitions, 658 flow [2022-07-12 10:02:13,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 313 transitions, 658 flow [2022-07-12 10:02:13,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:02:13,745 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@415a39c7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e14438d [2022-07-12 10:02:13,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:02:13,760 INFO L129 PetriNetUnfolder]: 15/204 cut-off events. [2022-07-12 10:02:13,760 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:02:13,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:13,761 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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] [2022-07-12 10:02:13,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-12 10:02:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash -518882499, now seen corresponding path program 1 times [2022-07-12 10:02:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:13,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934100689] [2022-07-12 10:02:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:13,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:13,808 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:02:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:13,833 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:02:13,834 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:02:13,835 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-12 10:02:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-12 10:02:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-12 10:02:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-12 10:02:13,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-12 10:02:13,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-12 10:02:13,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:02:13,836 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:02:13,836 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:02:13,837 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:02:13,888 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:02:13,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 362 places, 382 transitions, 809 flow [2022-07-12 10:02:13,966 INFO L129 PetriNetUnfolder]: 36/445 cut-off events. [2022-07-12 10:02:13,967 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:02:13,974 INFO L84 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 445 events. 36/445 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1593 event pairs, 0 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 376. Up to 12 conditions per place. [2022-07-12 10:02:13,974 INFO L82 GeneralOperation]: Start removeDead. Operand has 362 places, 382 transitions, 809 flow [2022-07-12 10:02:13,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 362 places, 382 transitions, 809 flow [2022-07-12 10:02:13,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:02:13,980 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@415a39c7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e14438d [2022-07-12 10:02:13,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:02:14,002 INFO L129 PetriNetUnfolder]: 20/267 cut-off events. [2022-07-12 10:02:14,003 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:02:14,003 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:14,003 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:14,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:02:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:14,004 INFO L85 PathProgramCache]: Analyzing trace with hash -417249095, now seen corresponding path program 1 times [2022-07-12 10:02:14,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:14,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023759337] [2022-07-12 10:02:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:14,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:14,020 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:02:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:14,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:02:14,041 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:02:14,041 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-12 10:02:14,041 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-12 10:02:14,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-12 10:02:14,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-12 10:02:14,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-12 10:02:14,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-12 10:02:14,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-12 10:02:14,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:02:14,043 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:02:14,043 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:02:14,043 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-12 10:02:14,096 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:02:14,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 427 places, 451 transitions, 962 flow [2022-07-12 10:02:14,227 INFO L129 PetriNetUnfolder]: 43/527 cut-off events. [2022-07-12 10:02:14,227 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:02:14,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 527 events. 43/527 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2076 event pairs, 0 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 464. Up to 14 conditions per place. [2022-07-12 10:02:14,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 427 places, 451 transitions, 962 flow [2022-07-12 10:02:14,246 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 427 places, 451 transitions, 962 flow [2022-07-12 10:02:14,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:02:14,251 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@415a39c7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e14438d [2022-07-12 10:02:14,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-12 10:02:14,295 INFO L129 PetriNetUnfolder]: 26/345 cut-off events. [2022-07-12 10:02:14,295 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:02:14,296 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:14,296 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:14,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:02:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash 311400004, now seen corresponding path program 1 times [2022-07-12 10:02:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:14,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183609095] [2022-07-12 10:02:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:14,340 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:02:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:14,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:02:14,372 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:02:14,372 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-07-12 10:02:14,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-07-12 10:02:14,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-07-12 10:02:14,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-07-12 10:02:14,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-07-12 10:02:14,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-07-12 10:02:14,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-07-12 10:02:14,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-07-12 10:02:14,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:02:14,374 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:02:14,376 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:02:14,378 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-12 10:02:14,443 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:02:14,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 492 places, 520 transitions, 1117 flow [2022-07-12 10:02:14,562 INFO L129 PetriNetUnfolder]: 50/609 cut-off events. [2022-07-12 10:02:14,562 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-12 10:02:14,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 609 events. 50/609 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2541 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 553. Up to 16 conditions per place. [2022-07-12 10:02:14,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 492 places, 520 transitions, 1117 flow [2022-07-12 10:02:14,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 492 places, 520 transitions, 1117 flow [2022-07-12 10:02:14,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:02:14,590 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@415a39c7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e14438d [2022-07-12 10:02:14,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-12 10:02:14,659 INFO L129 PetriNetUnfolder]: 27/351 cut-off events. [2022-07-12 10:02:14,659 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-07-12 10:02:14,660 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:14,660 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:14,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-07-12 10:02:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1122748584, now seen corresponding path program 1 times [2022-07-12 10:02:14,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:14,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946453181] [2022-07-12 10:02:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:14,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:02:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:02:14,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:02:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946453181] [2022-07-12 10:02:14,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946453181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:02:14,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:02:14,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:02:14,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654453023] [2022-07-12 10:02:14,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:02:14,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:02:14,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:02:14,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:02:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:02:14,812 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 405 out of 520 [2022-07-12 10:02:14,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 520 transitions, 1117 flow. Second operand has 3 states, 3 states have (on average 407.6666666666667) internal successors, (1223), 3 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states 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 10:02:14,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:02:14,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 405 of 520 [2022-07-12 10:02:14,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand