./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/25_stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-1.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 0cc9afdbf7eeaac0d52aedc8a0325c076240e2f45d0a3fe91081372b30b32137 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:18:34,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:18:34,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:18:34,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:18:34,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:18:34,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:18:34,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:18:34,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:18:34,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:18:34,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:18:34,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:18:34,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:18:34,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:18:34,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:18:34,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:18:34,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:18:34,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:18:34,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:18:34,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:18:34,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:18:34,849 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:18:34,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:18:34,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:18:34,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:18:34,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:18:34,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:18:34,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:18:34,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:18:34,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:18:34,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:18:34,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:18:34,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:18:34,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:18:34,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:18:34,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:18:34,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:18:34,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:18:34,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:18:34,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:18:34,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:18:34,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:18:34,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:18:34,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:18:34,884 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:18:34,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:18:34,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:18:34,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:18:34,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:18:34,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:18:34,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:18:34,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:18:34,890 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:18:34,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:18:34,891 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:18:34,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:18:34,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:18:34,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:18:34,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:18:34,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:18:34,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:18:34,892 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:18:34,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:18:34,892 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:18:34,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:18:34,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:18:34,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:18:34,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:18:34,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:18:34,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:18:34,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:18:34,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:18:34,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:18:34,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:18:34,894 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:18:34,894 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:18:34,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:18:34,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cc9afdbf7eeaac0d52aedc8a0325c076240e2f45d0a3fe91081372b30b32137 [2022-07-22 21:18:35,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:18:35,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:18:35,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:18:35,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:18:35,132 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:18:35,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/25_stack_longest-1.i [2022-07-22 21:18:35,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3636f85fc/12a730799f5a46c698d4bcbad2cf5685/FLAG80deedfbe [2022-07-22 21:18:35,611 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:18:35,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/25_stack_longest-1.i [2022-07-22 21:18:35,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3636f85fc/12a730799f5a46c698d4bcbad2cf5685/FLAG80deedfbe [2022-07-22 21:18:35,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3636f85fc/12a730799f5a46c698d4bcbad2cf5685 [2022-07-22 21:18:35,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:18:35,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:18:35,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:18:35,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:18:35,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:18:35,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:18:35" (1/1) ... [2022-07-22 21:18:35,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771b0d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:35, skipping insertion in model container [2022-07-22 21:18:35,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:18:35" (1/1) ... [2022-07-22 21:18:35,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:18:35,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:18:35,921 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-1.i[31040,31053] [2022-07-22 21:18:35,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:18:35,946 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:18:35,986 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-1.i[31040,31053] [2022-07-22 21:18:36,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:18:36,030 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:18:36,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36 WrapperNode [2022-07-22 21:18:36,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:18:36,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:18:36,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:18:36,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:18:36,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (1/1) ... [2022-07-22 21:18:36,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (1/1) ... [2022-07-22 21:18:36,088 INFO L137 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 172 [2022-07-22 21:18:36,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:18:36,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:18:36,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:18:36,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:18:36,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (1/1) ... [2022-07-22 21:18:36,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (1/1) ... [2022-07-22 21:18:36,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (1/1) ... [2022-07-22 21:18:36,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (1/1) ... [2022-07-22 21:18:36,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (1/1) ... [2022-07-22 21:18:36,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (1/1) ... [2022-07-22 21:18:36,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (1/1) ... [2022-07-22 21:18:36,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:18:36,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:18:36,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:18:36,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:18:36,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (1/1) ... [2022-07-22 21:18:36,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:18:36,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:18:36,170 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) [2022-07-22 21:18:36,184 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 [2022-07-22 21:18:36,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:18:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:18:36,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:18:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:18:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:18:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:18:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:18:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:18:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:18:36,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:18:36,225 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:18:36,398 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:18:36,400 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:18:36,582 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:18:36,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:18:36,715 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:18:36,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:18:36 BoogieIcfgContainer [2022-07-22 21:18:36,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:18:36,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:18:36,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:18:36,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:18:36,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:18:35" (1/3) ... [2022-07-22 21:18:36,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdffc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:18:36, skipping insertion in model container [2022-07-22 21:18:36,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:36" (2/3) ... [2022-07-22 21:18:36,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bdffc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:18:36, skipping insertion in model container [2022-07-22 21:18:36,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:18:36" (3/3) ... [2022-07-22 21:18:36,723 INFO L111 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-1.i [2022-07-22 21:18:36,727 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:18:36,746 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:18:36,746 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:18:36,746 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:18:36,876 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:36,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 102 places, 106 transitions, 217 flow [2022-07-22 21:18:36,936 INFO L129 PetriNetUnfolder]: 8/117 cut-off events. [2022-07-22 21:18:36,936 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:18:36,940 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. [2022-07-22 21:18:36,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 106 transitions, 217 flow [2022-07-22 21:18:36,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 106 transitions, 217 flow [2022-07-22 21:18:36,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:36,964 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@195eb3a8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79805b3f [2022-07-22 21:18:36,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:18:36,972 INFO L129 PetriNetUnfolder]: 3/60 cut-off events. [2022-07-22 21:18:36,973 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:18:36,973 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:36,974 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] [2022-07-22 21:18:36,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:18:36,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:36,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1261933473, now seen corresponding path program 1 times [2022-07-22 21:18:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:36,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506184575] [2022-07-22 21:18:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:36,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:37,089 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:37,133 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:37,134 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:37,135 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-22 21:18:37,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-22 21:18:37,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-22 21:18:37,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:18:37,138 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:18:37,141 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:37,144 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:18:37,200 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:37,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 167 places, 175 transitions, 362 flow [2022-07-22 21:18:37,262 INFO L129 PetriNetUnfolder]: 15/199 cut-off events. [2022-07-22 21:18:37,263 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:18:37,268 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. [2022-07-22 21:18:37,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 175 transitions, 362 flow [2022-07-22 21:18:37,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 175 transitions, 362 flow [2022-07-22 21:18:37,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:37,287 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@195eb3a8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79805b3f [2022-07-22 21:18:37,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:18:37,306 INFO L129 PetriNetUnfolder]: 7/101 cut-off events. [2022-07-22 21:18:37,306 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:18:37,306 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:37,307 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] [2022-07-22 21:18:37,307 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)] === [2022-07-22 21:18:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1656669066, now seen corresponding path program 1 times [2022-07-22 21:18:37,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:37,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983636962] [2022-07-22 21:18:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:37,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:37,356 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:37,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:37,387 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:37,388 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-22 21:18:37,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:18:37,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-22 21:18:37,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:18:37,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:18:37,389 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:18:37,390 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:37,391 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:18:37,433 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:37,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 232 places, 244 transitions, 509 flow [2022-07-22 21:18:37,466 INFO L129 PetriNetUnfolder]: 22/281 cut-off events. [2022-07-22 21:18:37,467 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:18:37,470 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. [2022-07-22 21:18:37,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 244 transitions, 509 flow [2022-07-22 21:18:37,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 244 transitions, 509 flow [2022-07-22 21:18:37,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:37,474 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@195eb3a8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79805b3f [2022-07-22 21:18:37,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:18:37,488 INFO L129 PetriNetUnfolder]: 11/146 cut-off events. [2022-07-22 21:18:37,488 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:18:37,488 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:37,489 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] [2022-07-22 21:18:37,490 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)] === [2022-07-22 21:18:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash 642993667, now seen corresponding path program 1 times [2022-07-22 21:18:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:37,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214920119] [2022-07-22 21:18:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:37,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:37,535 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:37,552 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:37,553 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:37,553 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:18:37,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:18:37,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-22 21:18:37,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:18:37,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:18:37,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:18:37,554 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:18:37,555 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:37,555 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:18:37,605 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:37,608 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 297 places, 313 transitions, 658 flow [2022-07-22 21:18:37,649 INFO L129 PetriNetUnfolder]: 29/363 cut-off events. [2022-07-22 21:18:37,650 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:18:37,671 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. [2022-07-22 21:18:37,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 297 places, 313 transitions, 658 flow [2022-07-22 21:18:37,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 313 transitions, 658 flow [2022-07-22 21:18:37,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:37,676 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@195eb3a8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79805b3f [2022-07-22 21:18:37,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:18:37,690 INFO L129 PetriNetUnfolder]: 15/204 cut-off events. [2022-07-22 21:18:37,690 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:18:37,690 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:37,690 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] [2022-07-22 21:18:37,691 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)] === [2022-07-22 21:18:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash -518882499, now seen corresponding path program 1 times [2022-07-22 21:18:37,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:37,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339006390] [2022-07-22 21:18:37,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:37,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:37,709 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:37,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:37,726 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:37,726 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:18:37,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:18:37,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-22 21:18:37,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:18:37,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:18:37,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:18:37,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:18:37,727 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:18:37,728 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:37,728 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:18:37,777 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:37,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 362 places, 382 transitions, 809 flow [2022-07-22 21:18:37,851 INFO L129 PetriNetUnfolder]: 36/445 cut-off events. [2022-07-22 21:18:37,852 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:18:37,859 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. [2022-07-22 21:18:37,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 362 places, 382 transitions, 809 flow [2022-07-22 21:18:37,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 362 places, 382 transitions, 809 flow [2022-07-22 21:18:37,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:37,865 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@195eb3a8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79805b3f [2022-07-22 21:18:37,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:18:37,897 INFO L129 PetriNetUnfolder]: 20/267 cut-off events. [2022-07-22 21:18:37,897 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:18:37,897 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:37,897 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] [2022-07-22 21:18:37,898 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)] === [2022-07-22 21:18:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash -417249095, now seen corresponding path program 1 times [2022-07-22 21:18:37,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:37,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253048453] [2022-07-22 21:18:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:37,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:37,916 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:37,934 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:37,934 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:37,934 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-22 21:18:37,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-22 21:18:37,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-22 21:18:37,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-22 21:18:37,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-22 21:18:37,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-22 21:18:37,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-22 21:18:37,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:18:37,936 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:18:37,936 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:37,936 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-22 21:18:37,994 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:37,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 427 places, 451 transitions, 962 flow [2022-07-22 21:18:38,096 INFO L129 PetriNetUnfolder]: 43/527 cut-off events. [2022-07-22 21:18:38,096 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-22 21:18:38,107 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. [2022-07-22 21:18:38,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 427 places, 451 transitions, 962 flow [2022-07-22 21:18:38,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 427 places, 451 transitions, 962 flow [2022-07-22 21:18:38,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:38,114 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@195eb3a8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79805b3f [2022-07-22 21:18:38,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-22 21:18:38,157 INFO L129 PetriNetUnfolder]: 26/345 cut-off events. [2022-07-22 21:18:38,157 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-22 21:18:38,157 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:38,158 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] [2022-07-22 21:18:38,158 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)] === [2022-07-22 21:18:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:38,158 INFO L85 PathProgramCache]: Analyzing trace with hash 311400004, now seen corresponding path program 1 times [2022-07-22 21:18:38,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:38,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982071881] [2022-07-22 21:18:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:38,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:38,199 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:38,220 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:38,229 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:38,229 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-07-22 21:18:38,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-07-22 21:18:38,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-07-22 21:18:38,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-07-22 21:18:38,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-07-22 21:18:38,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-07-22 21:18:38,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-07-22 21:18:38,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-07-22 21:18:38,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:18:38,233 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:18:38,234 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:38,234 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-22 21:18:38,298 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:38,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 492 places, 520 transitions, 1117 flow [2022-07-22 21:18:38,427 INFO L129 PetriNetUnfolder]: 50/609 cut-off events. [2022-07-22 21:18:38,427 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-22 21:18:38,440 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. [2022-07-22 21:18:38,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 492 places, 520 transitions, 1117 flow [2022-07-22 21:18:38,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 492 places, 520 transitions, 1117 flow [2022-07-22 21:18:38,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:38,453 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@195eb3a8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79805b3f [2022-07-22 21:18:38,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-22 21:18:38,509 INFO L129 PetriNetUnfolder]: 27/351 cut-off events. [2022-07-22 21:18:38,509 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-07-22 21:18:38,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:38,509 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] [2022-07-22 21:18:38,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-07-22 21:18:38,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1122748584, now seen corresponding path program 1 times [2022-07-22 21:18:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:38,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872718651] [2022-07-22 21:18:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:38,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:38,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:38,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872718651] [2022-07-22 21:18:38,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872718651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:38,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:38,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:38,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239395790] [2022-07-22 21:18:38,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:38,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:38,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:38,664 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 405 out of 520 [2022-07-22 21:18:38,668 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) [2022-07-22 21:18:38,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:38,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 405 of 520 [2022-07-22 21:18:38,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand