./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c -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 d7b83251f9a608d2befdac3ab06beaba9889f30d8ab1cb865fc88ebdabcb52dd --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:15:27,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:15:27,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:15:27,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:15:27,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:15:27,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:15:27,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:15:27,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:15:27,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:15:27,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:15:27,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:15:27,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:15:27,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:15:27,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:15:27,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:15:27,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:15:27,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:15:27,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:15:27,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:15:27,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:15:27,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:15:27,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:15:27,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:15:27,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:15:27,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:15:27,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:15:27,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:15:27,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:15:27,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:15:27,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:15:27,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:15:27,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:15:27,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:15:27,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:15:27,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:15:27,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:15:27,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:15:27,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:15:27,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:15:27,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:15:27,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:15:27,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:15:27,769 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:15:27,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:15:27,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:15:27,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:15:27,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:15:27,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:15:27,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:15:27,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:15:27,772 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:15:27,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:15:27,773 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:15:27,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:15:27,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:15:27,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:15:27,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:15:27,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:15:27,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:15:27,774 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:15:27,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:15:27,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:15:27,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:15:27,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:15:27,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:15:27,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:15:27,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:27,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:15:27,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:15:27,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:15:27,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:15:27,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:15:27,776 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:15:27,776 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:15:27,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:15:27,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:15:27,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b83251f9a608d2befdac3ab06beaba9889f30d8ab1cb865fc88ebdabcb52dd [2021-12-15 12:15:27,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:15:28,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:15:28,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:15:28,005 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:15:28,005 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:15:28,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2021-12-15 12:15:28,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0aa97bb0/6d298da1627b45319d4df17e2463023f/FLAGc36c5d8e6 [2021-12-15 12:15:28,441 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:15:28,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2021-12-15 12:15:28,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0aa97bb0/6d298da1627b45319d4df17e2463023f/FLAGc36c5d8e6 [2021-12-15 12:15:28,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0aa97bb0/6d298da1627b45319d4df17e2463023f [2021-12-15 12:15:28,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:15:28,470 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:15:28,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:28,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:15:28,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:15:28,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17e553d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28, skipping insertion in model container [2021-12-15 12:15:28,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:15:28,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:15:28,671 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/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[914,927] [2021-12-15 12:15:28,703 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/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[7115,7128] [2021-12-15 12:15:28,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:28,764 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:15:28,772 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/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[914,927] [2021-12-15 12:15:28,785 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/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[7115,7128] [2021-12-15 12:15:28,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:28,831 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:15:28,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28 WrapperNode [2021-12-15 12:15:28,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:28,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:28,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:15:28,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:15:28,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,879 INFO L137 Inliner]: procedures = 67, calls = 79, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 755 [2021-12-15 12:15:28,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:28,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:15:28,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:15:28,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:15:28,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:15:28,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:15:28,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:15:28,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:15:28,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (1/1) ... [2021-12-15 12:15:28,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:28,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:15:28,961 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) [2021-12-15 12:15:28,968 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 [2021-12-15 12:15:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:15:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:15:28,987 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:15:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-15 12:15:28,987 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-15 12:15:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:15:28,988 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:15:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:15:28,988 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:15:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-15 12:15:28,988 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-15 12:15:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:15:28,988 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:15:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:15:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:15:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-15 12:15:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-15 12:15:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-15 12:15:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-15 12:15:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-15 12:15:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-15 12:15:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:15:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:15:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:15:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:15:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:15:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-15 12:15:28,990 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-15 12:15:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:15:28,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:15:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:15:28,990 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:15:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-15 12:15:28,990 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-15 12:15:29,093 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:15:29,095 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:15:29,633 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:15:29,641 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:15:29,647 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-12-15 12:15:29,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:29 BoogieIcfgContainer [2021-12-15 12:15:29,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:15:29,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:15:29,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:15:29,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:15:29,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:15:28" (1/3) ... [2021-12-15 12:15:29,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313f622f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:29, skipping insertion in model container [2021-12-15 12:15:29,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:28" (2/3) ... [2021-12-15 12:15:29,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313f622f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:29, skipping insertion in model container [2021-12-15 12:15:29,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:29" (3/3) ... [2021-12-15 12:15:29,656 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2021-12-15 12:15:29,663 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:15:29,663 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:15:29,708 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:15:29,715 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 12:15:29,715 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:15:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 311 states have (on average 1.6205787781350482) internal successors, (504), 319 states have internal predecessors, (504), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 12:15:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 12:15:29,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:15:29,756 INFO L514 BasicCegarLoop]: 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] [2021-12-15 12:15:29,756 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:15:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:15:29,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1360309696, now seen corresponding path program 1 times [2021-12-15 12:15:29,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:15:29,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876061242] [2021-12-15 12:15:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:15:29,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:15:29,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:15:29,808 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 12:15:29,815 INFO L158 Benchmark]: Toolchain (without parser) took 1342.89ms. Allocated memory is still 115.3MB. Free memory was 82.4MB in the beginning and 71.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. [2021-12-15 12:15:29,816 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 79.7MB. Free memory was 49.8MB in the beginning and 49.8MB in the end (delta: 18.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:15:29,816 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.66ms. Allocated memory is still 115.3MB. Free memory was 82.4MB in the beginning and 81.6MB in the end (delta: 744.0kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-15 12:15:29,817 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.56ms. Allocated memory is still 115.3MB. Free memory was 81.6MB in the beginning and 77.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 12:15:29,817 INFO L158 Benchmark]: Boogie Preprocessor took 41.42ms. Allocated memory is still 115.3MB. Free memory was 77.4MB in the beginning and 74.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:15:29,818 INFO L158 Benchmark]: RCFGBuilder took 727.49ms. Allocated memory is still 115.3MB. Free memory was 74.0MB in the beginning and 83.3MB in the end (delta: -9.4MB). Peak memory consumption was 38.9MB. Max. memory is 16.1GB. [2021-12-15 12:15:29,822 INFO L158 Benchmark]: TraceAbstraction took 162.11ms. Allocated memory is still 115.3MB. Free memory was 82.6MB in the beginning and 71.4MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:15:29,826 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 79.7MB. Free memory was 49.8MB in the beginning and 49.8MB in the end (delta: 18.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 358.66ms. Allocated memory is still 115.3MB. Free memory was 82.4MB in the beginning and 81.6MB in the end (delta: 744.0kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.56ms. Allocated memory is still 115.3MB. Free memory was 81.6MB in the beginning and 77.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.42ms. Allocated memory is still 115.3MB. Free memory was 77.4MB in the beginning and 74.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 727.49ms. Allocated memory is still 115.3MB. Free memory was 74.0MB in the beginning and 83.3MB in the end (delta: -9.4MB). Peak memory consumption was 38.9MB. Max. memory is 16.1GB. * TraceAbstraction took 162.11ms. Allocated memory is still 115.3MB. Free memory was 82.6MB in the beginning and 71.4MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 12:15:29,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 d7b83251f9a608d2befdac3ab06beaba9889f30d8ab1cb865fc88ebdabcb52dd --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:15:31,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:15:31,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:15:31,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:15:31,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:15:31,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:15:31,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:15:31,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:15:31,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:15:31,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:15:31,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:15:31,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:15:31,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:15:31,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:15:31,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:15:31,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:15:31,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:15:31,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:15:31,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:15:31,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:15:31,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:15:31,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:15:31,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:15:31,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:15:31,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:15:31,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:15:31,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:15:31,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:15:31,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:15:31,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:15:31,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:15:31,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:15:31,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:15:31,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:15:31,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:15:31,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:15:31,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:15:31,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:15:31,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:15:31,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:15:31,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:15:31,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 12:15:31,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:15:31,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:15:31,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:15:31,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:15:31,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:15:31,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:15:31,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:15:31,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:15:31,680 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:15:31,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:15:31,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:15:31,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:15:31,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:15:31,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:15:31,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:15:31,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:15:31,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 12:15:31,682 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 12:15:31,682 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 12:15:31,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:15:31,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:15:31,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:15:31,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:15:31,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:15:31,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:15:31,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:15:31,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:31,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:15:31,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:15:31,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:15:31,684 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 12:15:31,684 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 12:15:31,685 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:15:31,685 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:15:31,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:15:31,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:15:31,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 12:15:31,685 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b83251f9a608d2befdac3ab06beaba9889f30d8ab1cb865fc88ebdabcb52dd [2021-12-15 12:15:31,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:15:31,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:15:31,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:15:31,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:15:31,959 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:15:31,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2021-12-15 12:15:32,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb50aa94/37080b8791fa4e2791e14e5000118f84/FLAGcb3e1bc42 [2021-12-15 12:15:32,427 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:15:32,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2021-12-15 12:15:32,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb50aa94/37080b8791fa4e2791e14e5000118f84/FLAGcb3e1bc42 [2021-12-15 12:15:32,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb50aa94/37080b8791fa4e2791e14e5000118f84 [2021-12-15 12:15:32,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:15:32,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:15:32,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:32,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:15:32,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:15:32,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f745ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32, skipping insertion in model container [2021-12-15 12:15:32,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:15:32,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:15:32,614 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/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[914,927] [2021-12-15 12:15:32,680 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/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[7115,7128] [2021-12-15 12:15:32,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:32,783 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:15:32,793 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/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[914,927] [2021-12-15 12:15:32,830 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/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[7115,7128] [2021-12-15 12:15:32,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:32,870 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:15:32,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32 WrapperNode [2021-12-15 12:15:32,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:32,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:32,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:15:32,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:15:32,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,928 INFO L137 Inliner]: procedures = 68, calls = 79, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 725 [2021-12-15 12:15:32,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:32,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:15:32,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:15:32,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:15:32,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:32,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:15:32,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:15:32,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:15:32,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:15:32,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (1/1) ... [2021-12-15 12:15:33,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:15:33,032 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) [2021-12-15 12:15:33,059 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 [2021-12-15 12:15:33,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:15:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:15:33,073 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:15:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-15 12:15:33,073 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-15 12:15:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:15:33,073 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:15:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:15:33,074 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:15:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-15 12:15:33,074 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-15 12:15:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:15:33,074 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:15:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:15:33,074 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:15:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-15 12:15:33,075 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-15 12:15:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 12:15:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-15 12:15:33,075 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-15 12:15:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-15 12:15:33,075 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-15 12:15:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:15:33,075 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:15:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:15:33,076 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:15:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-15 12:15:33,076 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-15 12:15:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:15:33,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:15:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:15:33,077 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:15:33,077 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-15 12:15:33,077 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-15 12:15:33,183 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:15:33,185 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:15:33,744 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:15:33,750 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:15:33,750 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-12-15 12:15:33,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:33 BoogieIcfgContainer [2021-12-15 12:15:33,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:15:33,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:15:33,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:15:33,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:15:33,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:15:32" (1/3) ... [2021-12-15 12:15:33,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a335e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:33, skipping insertion in model container [2021-12-15 12:15:33,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:32" (2/3) ... [2021-12-15 12:15:33,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a335e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:33, skipping insertion in model container [2021-12-15 12:15:33,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:33" (3/3) ... [2021-12-15 12:15:33,757 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2021-12-15 12:15:33,761 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:15:33,762 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:15:33,804 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:15:33,809 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 12:15:33,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:15:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 311 states have (on average 1.6205787781350482) internal successors, (504), 319 states have internal predecessors, (504), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 12:15:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 12:15:33,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:15:33,829 INFO L514 BasicCegarLoop]: 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] [2021-12-15 12:15:33,829 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:15:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:15:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1360309696, now seen corresponding path program 1 times [2021-12-15 12:15:33,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 12:15:33,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376655098] [2021-12-15 12:15:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:15:33,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 12:15:33,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 12:15:33,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 12:15:33,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 12:15:33,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 12:15:34,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 12:15:34,113 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 12:15:34,118 INFO L158 Benchmark]: Toolchain (without parser) took 1662.28ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 37.3MB in the beginning and 48.4MB in the end (delta: -11.1MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. [2021-12-15 12:15:34,119 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory was 41.5MB in the beginning and 41.4MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:15:34,120 INFO L158 Benchmark]: CACSL2BoogieTranslator took 414.79ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 37.1MB in the beginning and 47.9MB in the end (delta: -10.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-15 12:15:34,120 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.78ms. Allocated memory is still 71.3MB. Free memory was 47.9MB in the beginning and 44.2MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 12:15:34,120 INFO L158 Benchmark]: Boogie Preprocessor took 67.81ms. Allocated memory is still 71.3MB. Free memory was 44.2MB in the beginning and 40.4MB in the end (delta: 3.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:15:34,121 INFO L158 Benchmark]: RCFGBuilder took 754.29ms. Allocated memory is still 71.3MB. Free memory was 40.4MB in the beginning and 39.7MB in the end (delta: 692.5kB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2021-12-15 12:15:34,121 INFO L158 Benchmark]: TraceAbstraction took 363.33ms. Allocated memory is still 71.3MB. Free memory was 39.3MB in the beginning and 48.4MB in the end (delta: -9.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 12:15:34,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 58.7MB. Free memory was 41.5MB in the beginning and 41.4MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 414.79ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 37.1MB in the beginning and 47.9MB in the end (delta: -10.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.78ms. Allocated memory is still 71.3MB. Free memory was 47.9MB in the beginning and 44.2MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.81ms. Allocated memory is still 71.3MB. Free memory was 44.2MB in the beginning and 40.4MB in the end (delta: 3.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 754.29ms. Allocated memory is still 71.3MB. Free memory was 40.4MB in the beginning and 39.7MB in the end (delta: 692.5kB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. * TraceAbstraction took 363.33ms. Allocated memory is still 71.3MB. Free memory was 39.3MB in the beginning and 48.4MB in the end (delta: -9.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 12:15:34,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable