./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.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_1.cil-2+token_ring.01.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 1fc4175868fd9160b7d31310c312f3c40c885306cd37c45505af16cdc713f79b --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:14:52,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:14:52,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:14:52,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:14:52,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:14:52,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:14:52,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:14:52,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:14:52,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:14:52,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:14:52,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:14:52,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:14:52,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:14:52,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:14:52,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:14:52,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:14:52,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:14:52,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:14:52,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:14:52,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:14:52,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:14:52,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:14:52,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:14:52,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:14:52,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:14:52,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:14:52,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:14:52,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:14:52,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:14:52,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:14:52,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:14:52,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:14:52,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:14:52,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:14:52,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:14:52,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:14:52,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:14:52,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:14:52,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:14:52,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:14:52,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:14:52,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:14:53,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:14:53,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:14:53,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:14:53,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:14:53,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:14:53,028 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:14:53,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:14:53,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:14:53,029 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:14:53,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:14:53,031 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:14:53,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:14:53,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:14:53,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:14:53,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:14:53,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:14:53,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:14:53,032 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:14:53,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:14:53,032 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:14:53,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:14:53,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:14:53,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:14:53,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:14:53,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:53,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:14:53,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:14:53,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:14:53,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:14:53,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:14:53,035 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:14:53,035 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:14:53,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:14:53,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:14:53,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fc4175868fd9160b7d31310c312f3c40c885306cd37c45505af16cdc713f79b [2021-12-15 12:14:53,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:14:53,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:14:53,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:14:53,290 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:14:53,290 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:14:53,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c [2021-12-15 12:14:53,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea27aeb98/5477b41dbf914ebe9d452b9248ec9b7a/FLAG6d277b7be [2021-12-15 12:14:53,775 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:14:53,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c [2021-12-15 12:14:53,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea27aeb98/5477b41dbf914ebe9d452b9248ec9b7a/FLAG6d277b7be [2021-12-15 12:14:54,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea27aeb98/5477b41dbf914ebe9d452b9248ec9b7a [2021-12-15 12:14:54,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:14:54,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:14:54,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:54,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:14:54,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:14:54,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@714791ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54, skipping insertion in model container [2021-12-15 12:14:54,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:14:54,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:14:54,390 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_1.cil-2+token_ring.01.cil-2.c[913,926] [2021-12-15 12:14:54,436 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_1.cil-2+token_ring.01.cil-2.c[5977,5990] [2021-12-15 12:14:54,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:54,468 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:14:54,483 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_1.cil-2+token_ring.01.cil-2.c[913,926] [2021-12-15 12:14:54,506 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_1.cil-2+token_ring.01.cil-2.c[5977,5990] [2021-12-15 12:14:54,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:54,535 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:14:54,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54 WrapperNode [2021-12-15 12:14:54,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:54,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:54,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:14:54,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:14:54,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,584 INFO L137 Inliner]: procedures = 50, calls = 52, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 422 [2021-12-15 12:14:54,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:54,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:14:54,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:14:54,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:14:54,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:14:54,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:14:54,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:14:54,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:14:54,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:54,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:14:54,665 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 12:14:54,667 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 12:14:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:14:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:14:54,690 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:14:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-15 12:14:54,690 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-15 12:14:54,691 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:14:54,691 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:14:54,691 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:14:54,691 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:14:54,691 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:14:54,691 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:14:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:14:54,692 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:14:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:14:54,692 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:14:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:14:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:14:54,692 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:14:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:14:54,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:14:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:14:54,693 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:14:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-15 12:14:54,693 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-15 12:14:54,762 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:14:54,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:14:55,126 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:14:55,135 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:14:55,135 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-15 12:14:55,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:14:55 BoogieIcfgContainer [2021-12-15 12:14:55,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:14:55,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:14:55,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:14:55,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:14:55,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:14:54" (1/3) ... [2021-12-15 12:14:55,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a6e9b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:14:55, skipping insertion in model container [2021-12-15 12:14:55,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:54" (2/3) ... [2021-12-15 12:14:55,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a6e9b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:14:55, skipping insertion in model container [2021-12-15 12:14:55,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:14:55" (3/3) ... [2021-12-15 12:14:55,145 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.01.cil-2.c [2021-12-15 12:14:55,149 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:14:55,151 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:14:55,193 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:14:55,199 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 12:14:55,200 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:14:55,231 INFO L276 IsEmpty]: Start isEmpty. Operand has 187 states, 151 states have (on average 1.5562913907284768) internal successors, (235), 158 states have internal predecessors, (235), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-15 12:14:55,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 12:14:55,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:14:55,247 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] [2021-12-15 12:14:55,247 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:14:55,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:14:55,256 INFO L85 PathProgramCache]: Analyzing trace with hash 578004893, now seen corresponding path program 1 times [2021-12-15 12:14:55,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:14:55,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963725835] [2021-12-15 12:14:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:14:55,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:14:55,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:14:55,354 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 12:14:55,361 INFO L158 Benchmark]: Toolchain (without parser) took 1181.57ms. Allocated memory is still 96.5MB. Free memory was 62.8MB in the beginning and 71.9MB in the end (delta: -9.1MB). Peak memory consumption was 35.0MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,361 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 79.7MB. Free memory was 52.9MB in the beginning and 52.8MB in the end (delta: 31.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:14:55,363 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.20ms. Allocated memory is still 96.5MB. Free memory was 62.6MB in the beginning and 68.6MB in the end (delta: -6.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,363 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.36ms. Allocated memory is still 96.5MB. Free memory was 68.2MB in the beginning and 65.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,364 INFO L158 Benchmark]: Boogie Preprocessor took 52.97ms. Allocated memory is still 96.5MB. Free memory was 65.6MB in the beginning and 63.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,364 INFO L158 Benchmark]: RCFGBuilder took 497.67ms. Allocated memory is still 96.5MB. Free memory was 63.5MB in the beginning and 42.0MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,369 INFO L158 Benchmark]: TraceAbstraction took 218.80ms. Allocated memory is still 96.5MB. Free memory was 41.5MB in the beginning and 71.9MB in the end (delta: -30.4MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,374 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 79.7MB. Free memory was 52.9MB in the beginning and 52.8MB in the end (delta: 31.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 358.20ms. Allocated memory is still 96.5MB. Free memory was 62.6MB in the beginning and 68.6MB in the end (delta: -6.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.36ms. Allocated memory is still 96.5MB. Free memory was 68.2MB in the beginning and 65.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.97ms. Allocated memory is still 96.5MB. Free memory was 65.6MB in the beginning and 63.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 497.67ms. Allocated memory is still 96.5MB. Free memory was 63.5MB in the beginning and 42.0MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 218.80ms. Allocated memory is still 96.5MB. Free memory was 41.5MB in the beginning and 71.9MB in the end (delta: -30.4MB). Peak memory consumption was 16.5MB. 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 12:14:55,407 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 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_1.cil-2+token_ring.01.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 1fc4175868fd9160b7d31310c312f3c40c885306cd37c45505af16cdc713f79b --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:14:57,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:14:57,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:14:57,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:14:57,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:14:57,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:14:57,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:14:57,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:14:57,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:14:57,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:14:57,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:14:57,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:14:57,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:14:57,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:14:57,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:14:57,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:14:57,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:14:57,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:14:57,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:14:57,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:14:57,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:14:57,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:14:57,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:14:57,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:14:57,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:14:57,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:14:57,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:14:57,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:14:57,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:14:57,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:14:57,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:14:57,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:14:57,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:14:57,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:14:57,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:14:57,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:14:57,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:14:57,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:14:57,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:14:57,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:14:57,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:14:57,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 12:14:57,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:14:57,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:14:57,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:14:57,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:14:57,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:14:57,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:14:57,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:14:57,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:14:57,483 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:14:57,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:14:57,484 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:14:57,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:14:57,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:14:57,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:14:57,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:14:57,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:14:57,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 12:14:57,485 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 12:14:57,485 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 12:14:57,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:14:57,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:14:57,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:14:57,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:14:57,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:14:57,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:14:57,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:14:57,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:57,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:14:57,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:14:57,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:14:57,488 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 12:14:57,488 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 12:14:57,488 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:14:57,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:14:57,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:14:57,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:14:57,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 12:14:57,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fc4175868fd9160b7d31310c312f3c40c885306cd37c45505af16cdc713f79b [2021-12-15 12:14:57,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:14:57,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:14:57,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:14:57,835 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:14:57,836 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:14:57,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c [2021-12-15 12:14:57,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0f0d12e9/60c891ea10fd44aaa2c653f591a49726/FLAGed7cb0fa6 [2021-12-15 12:14:58,346 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:14:58,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c [2021-12-15 12:14:58,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0f0d12e9/60c891ea10fd44aaa2c653f591a49726/FLAGed7cb0fa6 [2021-12-15 12:14:58,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0f0d12e9/60c891ea10fd44aaa2c653f591a49726 [2021-12-15 12:14:58,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:14:58,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:14:58,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:58,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:14:58,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:14:58,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283f21eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58, skipping insertion in model container [2021-12-15 12:14:58,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:14:58,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:14:58,909 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_1.cil-2+token_ring.01.cil-2.c[913,926] [2021-12-15 12:14:58,985 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_1.cil-2+token_ring.01.cil-2.c[5977,5990] [2021-12-15 12:14:59,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:59,043 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:14:59,055 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_1.cil-2+token_ring.01.cil-2.c[913,926] [2021-12-15 12:14:59,082 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_1.cil-2+token_ring.01.cil-2.c[5977,5990] [2021-12-15 12:14:59,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:59,131 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:14:59,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59 WrapperNode [2021-12-15 12:14:59,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:59,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:59,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:14:59,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:14:59,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (1/1) ... [2021-12-15 12:14:59,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (1/1) ... [2021-12-15 12:14:59,198 INFO L137 Inliner]: procedures = 51, calls = 52, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 402 [2021-12-15 12:14:59,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:59,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:14:59,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:14:59,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:14:59,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (1/1) ... [2021-12-15 12:14:59,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (1/1) ... [2021-12-15 12:14:59,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (1/1) ... [2021-12-15 12:14:59,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (1/1) ... [2021-12-15 12:14:59,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (1/1) ... [2021-12-15 12:14:59,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (1/1) ... [2021-12-15 12:14:59,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (1/1) ... [2021-12-15 12:14:59,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:14:59,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:14:59,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:14:59,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:14:59,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (1/1) ... [2021-12-15 12:14:59,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:59,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:14:59,288 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 12:14:59,314 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 12:14:59,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:14:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:14:59,330 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:14:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-15 12:14:59,330 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-15 12:14:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:14:59,330 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:14:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:14:59,331 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:14:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:14:59,331 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:14:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:14:59,331 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:14:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 12:14:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:14:59,332 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:14:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:14:59,332 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:14:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:14:59,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:14:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:14:59,333 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:14:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-15 12:14:59,333 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-15 12:14:59,449 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:14:59,451 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:14:59,885 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:14:59,896 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:14:59,898 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-15 12:14:59,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:14:59 BoogieIcfgContainer [2021-12-15 12:14:59,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:14:59,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:14:59,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:14:59,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:14:59,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:14:58" (1/3) ... [2021-12-15 12:14:59,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321ca8b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:14:59, skipping insertion in model container [2021-12-15 12:14:59,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:59" (2/3) ... [2021-12-15 12:14:59,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321ca8b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:14:59, skipping insertion in model container [2021-12-15 12:14:59,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:14:59" (3/3) ... [2021-12-15 12:14:59,908 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.01.cil-2.c [2021-12-15 12:14:59,913 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:14:59,913 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:14:59,959 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:14:59,965 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 12:14:59,965 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:14:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 187 states, 151 states have (on average 1.5562913907284768) internal successors, (235), 158 states have internal predecessors, (235), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-15 12:14:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 12:14:59,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:14:59,994 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] [2021-12-15 12:14:59,994 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:14:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:14:59,999 INFO L85 PathProgramCache]: Analyzing trace with hash 578004893, now seen corresponding path program 1 times [2021-12-15 12:15:00,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 12:15:00,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572617888] [2021-12-15 12:15:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:15:00,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 12:15:00,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 12:15:00,024 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 12:15:00,025 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 12:15:00,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 12:15:00,258 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 12:15:00,259 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 12:15:00,263 INFO L158 Benchmark]: Toolchain (without parser) took 1526.15ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 29.2MB in the beginning and 40.7MB in the end (delta: -11.5MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. [2021-12-15 12:15:00,264 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 52.4MB. Free memory is still 33.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:15:00,264 INFO L158 Benchmark]: CACSL2BoogieTranslator took 394.91ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 29.1MB in the beginning and 41.2MB in the end (delta: -12.1MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2021-12-15 12:15:00,265 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.17ms. Allocated memory is still 62.9MB. Free memory was 41.2MB in the beginning and 38.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:15:00,266 INFO L158 Benchmark]: Boogie Preprocessor took 45.22ms. Allocated memory is still 62.9MB. Free memory was 38.4MB in the beginning and 36.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:15:00,266 INFO L158 Benchmark]: RCFGBuilder took 653.38ms. Allocated memory is still 62.9MB. Free memory was 36.1MB in the beginning and 31.5MB in the end (delta: 4.6MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2021-12-15 12:15:00,267 INFO L158 Benchmark]: TraceAbstraction took 359.33ms. Allocated memory is still 62.9MB. Free memory was 30.9MB in the beginning and 40.7MB in the end (delta: -9.9MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2021-12-15 12:15:00,270 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 52.4MB. Free memory is still 33.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 394.91ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 29.1MB in the beginning and 41.2MB in the end (delta: -12.1MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.17ms. Allocated memory is still 62.9MB. Free memory was 41.2MB in the beginning and 38.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.22ms. Allocated memory is still 62.9MB. Free memory was 38.4MB in the beginning and 36.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 653.38ms. Allocated memory is still 62.9MB. Free memory was 36.1MB in the beginning and 31.5MB in the end (delta: 4.6MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. * TraceAbstraction took 359.33ms. Allocated memory is still 62.9MB. Free memory was 30.9MB in the beginning and 40.7MB in the end (delta: -9.9MB). Peak memory consumption was 11.9MB. 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 12:15:00,301 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