./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-1+token_ring.04.cil-1.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-1+token_ring.04.cil-1.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 7aa7bd07197bec95559c5698226af90cd1b90ff400e8df11e207de02b1c5b2da --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:14:31,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:14:31,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:14:31,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:14:31,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:14:31,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:14:31,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:14:31,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:14:31,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:14:31,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:14:31,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:14:31,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:14:31,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:14:31,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:14:31,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:14:31,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:14:31,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:14:31,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:14:31,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:14:31,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:14:31,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:14:31,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:14:31,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:14:31,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:14:31,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:14:31,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:14:31,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:14:31,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:14:31,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:14:31,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:14:31,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:14:31,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:14:31,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:14:31,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:14:31,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:14:31,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:14:31,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:14:31,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:14:31,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:14:31,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:14:31,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:14:31,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:14:31,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:14:31,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:14:31,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:14:31,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:14:31,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:14:31,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:14:31,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:14:31,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:14:31,632 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:14:31,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:14:31,633 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:14:31,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:14:31,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:14:31,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:14:31,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:14:31,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:14:31,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:14:31,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:14:31,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:14:31,634 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:14:31,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:14:31,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:14:31,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:14:31,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:14:31,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:31,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:14:31,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:14:31,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:14:31,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:14:31,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:14:31,637 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:14:31,637 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:14:31,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:14:31,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:14:31,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7aa7bd07197bec95559c5698226af90cd1b90ff400e8df11e207de02b1c5b2da [2021-12-15 12:14:31,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:14:31,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:14:31,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:14:31,877 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:14:31,879 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:14:31,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-1+token_ring.04.cil-1.c [2021-12-15 12:14:31,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f210f5f46/f07f35f326284677ae12a232103d57bb/FLAG107d94876 [2021-12-15 12:14:32,300 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:14:32,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-1+token_ring.04.cil-1.c [2021-12-15 12:14:32,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f210f5f46/f07f35f326284677ae12a232103d57bb/FLAG107d94876 [2021-12-15 12:14:32,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f210f5f46/f07f35f326284677ae12a232103d57bb [2021-12-15 12:14:32,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:14:32,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:14:32,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:32,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:14:32,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:14:32,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:32" (1/1) ... [2021-12-15 12:14:32,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcb81a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:32, skipping insertion in model container [2021-12-15 12:14:32,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:32" (1/1) ... [2021-12-15 12:14:32,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:14:32,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:14:32,840 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-1+token_ring.04.cil-1.c[913,926] [2021-12-15 12:14:32,868 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-1+token_ring.04.cil-1.c[5994,6007] [2021-12-15 12:14:32,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:32,951 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:14:32,969 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-1+token_ring.04.cil-1.c[913,926] [2021-12-15 12:14:32,981 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-1+token_ring.04.cil-1.c[5994,6007] [2021-12-15 12:14:33,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:33,032 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:14:33,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33 WrapperNode [2021-12-15 12:14:33,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:33,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:33,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:14:33,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:14:33,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (1/1) ... [2021-12-15 12:14:33,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (1/1) ... [2021-12-15 12:14:33,082 INFO L137 Inliner]: procedures = 56, calls = 61, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 592 [2021-12-15 12:14:33,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:33,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:14:33,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:14:33,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:14:33,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (1/1) ... [2021-12-15 12:14:33,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (1/1) ... [2021-12-15 12:14:33,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (1/1) ... [2021-12-15 12:14:33,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (1/1) ... [2021-12-15 12:14:33,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (1/1) ... [2021-12-15 12:14:33,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (1/1) ... [2021-12-15 12:14:33,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (1/1) ... [2021-12-15 12:14:33,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:14:33,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:14:33,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:14:33,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:14:33,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (1/1) ... [2021-12-15 12:14:33,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:33,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:14:33,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 12:14:33,177 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 12:14:33,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:14:33,209 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:14:33,209 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:14:33,209 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-15 12:14:33,210 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-15 12:14:33,210 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:14:33,210 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:14:33,210 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:14:33,211 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:14:33,211 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:14:33,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:14:33,211 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:14:33,211 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:14:33,211 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:14:33,211 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:14:33,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:14:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:14:33,212 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:14:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:14:33,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:14:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:14:33,212 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:14:33,331 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:14:33,332 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:14:33,700 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:14:33,706 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:14:33,706 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-15 12:14:33,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:14:33 BoogieIcfgContainer [2021-12-15 12:14:33,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:14:33,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:14:33,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:14:33,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:14:33,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:14:32" (1/3) ... [2021-12-15 12:14:33,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e477a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:14:33, skipping insertion in model container [2021-12-15 12:14:33,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:33" (2/3) ... [2021-12-15 12:14:33,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e477a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:14:33, skipping insertion in model container [2021-12-15 12:14:33,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:14:33" (3/3) ... [2021-12-15 12:14:33,723 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-1+token_ring.04.cil-1.c [2021-12-15 12:14:33,726 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:14:33,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:14:33,758 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:14:33,762 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 12:14:33,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:14:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 218 states have (on average 1.5963302752293578) internal successors, (348), 224 states have internal predecessors, (348), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 12:14:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 12:14:33,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:14:33,781 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] [2021-12-15 12:14:33,782 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:14:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:14:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash 310849250, now seen corresponding path program 1 times [2021-12-15 12:14:33,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:14:33,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850050806] [2021-12-15 12:14:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:14:33,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:14:33,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:14:33,831 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 12:14:33,839 INFO L158 Benchmark]: Toolchain (without parser) took 1147.34ms. Allocated memory is still 111.1MB. Free memory was 82.4MB in the beginning and 69.4MB in the end (delta: 13.0MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2021-12-15 12:14:33,840 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 83.9MB. Free memory was 43.7MB in the beginning and 43.7MB in the end (delta: 40.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:14:33,841 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.04ms. Allocated memory is still 111.1MB. Free memory was 82.2MB in the beginning and 81.7MB in the end (delta: 431.0kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:14:33,842 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.24ms. Allocated memory is still 111.1MB. Free memory was 81.7MB in the beginning and 78.8MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 12:14:33,842 INFO L158 Benchmark]: Boogie Preprocessor took 45.79ms. Allocated memory is still 111.1MB. Free memory was 78.4MB in the beginning and 75.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:14:33,843 INFO L158 Benchmark]: RCFGBuilder took 577.54ms. Allocated memory is still 111.1MB. Free memory was 75.9MB in the beginning and 79.8MB in the end (delta: -4.0MB). Peak memory consumption was 27.0MB. Max. memory is 16.1GB. [2021-12-15 12:14:33,847 INFO L158 Benchmark]: TraceAbstraction took 128.54ms. Allocated memory is still 111.1MB. Free memory was 79.8MB in the beginning and 69.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:14:33,850 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 83.9MB. Free memory was 43.7MB in the beginning and 43.7MB in the end (delta: 40.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.04ms. Allocated memory is still 111.1MB. Free memory was 82.2MB in the beginning and 81.7MB in the end (delta: 431.0kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.24ms. Allocated memory is still 111.1MB. Free memory was 81.7MB in the beginning and 78.8MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.79ms. Allocated memory is still 111.1MB. Free memory was 78.4MB in the beginning and 75.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 577.54ms. Allocated memory is still 111.1MB. Free memory was 75.9MB in the beginning and 79.8MB in the end (delta: -4.0MB). Peak memory consumption was 27.0MB. Max. memory is 16.1GB. * TraceAbstraction took 128.54ms. Allocated memory is still 111.1MB. Free memory was 79.8MB in the beginning and 69.4MB in the end (delta: 10.4MB). 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 12:14:33,876 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-1+token_ring.04.cil-1.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 7aa7bd07197bec95559c5698226af90cd1b90ff400e8df11e207de02b1c5b2da --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:14:35,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:14:35,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:14:35,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:14:35,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:14:35,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:14:35,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:14:35,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:14:35,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:14:35,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:14:35,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:14:35,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:14:35,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:14:35,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:14:35,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:14:35,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:14:35,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:14:35,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:14:35,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:14:35,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:14:35,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:14:35,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:14:35,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:14:35,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:14:35,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:14:35,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:14:35,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:14:35,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:14:35,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:14:35,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:14:35,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:14:35,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:14:35,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:14:35,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:14:35,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:14:35,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:14:35,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:14:35,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:14:35,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:14:35,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:14:35,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:14:35,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 12:14:35,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:14:35,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:14:35,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:14:35,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:14:35,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:14:35,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:14:35,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:14:35,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:14:35,640 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:14:35,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:14:35,641 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:14:35,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:14:35,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:14:35,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:14:35,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:14:35,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:14:35,642 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 12:14:35,642 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 12:14:35,642 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 12:14:35,642 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:14:35,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:14:35,643 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:14:35,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:14:35,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:14:35,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:14:35,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:14:35,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:35,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:14:35,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:14:35,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:14:35,644 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 12:14:35,644 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 12:14:35,644 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:14:35,645 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:14:35,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:14:35,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:14:35,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 12:14:35,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7aa7bd07197bec95559c5698226af90cd1b90ff400e8df11e207de02b1c5b2da [2021-12-15 12:14:35,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:14:35,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:14:35,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:14:35,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:14:35,918 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:14:35,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-1+token_ring.04.cil-1.c [2021-12-15 12:14:35,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469651f50/dfeb87afb2834f9d809c5e0d843da541/FLAG0278449e6 [2021-12-15 12:14:36,389 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:14:36,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-1+token_ring.04.cil-1.c [2021-12-15 12:14:36,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469651f50/dfeb87afb2834f9d809c5e0d843da541/FLAG0278449e6 [2021-12-15 12:14:36,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469651f50/dfeb87afb2834f9d809c5e0d843da541 [2021-12-15 12:14:36,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:14:36,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:14:36,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:36,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:14:36,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:14:36,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@534c7d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36, skipping insertion in model container [2021-12-15 12:14:36,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:14:36,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:14:36,591 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-1+token_ring.04.cil-1.c[913,926] [2021-12-15 12:14:36,624 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-1+token_ring.04.cil-1.c[5994,6007] [2021-12-15 12:14:36,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:36,722 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:14:36,744 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-1+token_ring.04.cil-1.c[913,926] [2021-12-15 12:14:36,753 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-1+token_ring.04.cil-1.c[5994,6007] [2021-12-15 12:14:36,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:36,792 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:14:36,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36 WrapperNode [2021-12-15 12:14:36,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:36,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:36,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:14:36,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:14:36,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,862 INFO L137 Inliner]: procedures = 57, calls = 61, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 567 [2021-12-15 12:14:36,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:36,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:14:36,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:14:36,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:14:36,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:14:36,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:14:36,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:14:36,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:14:36,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (1/1) ... [2021-12-15 12:14:36,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:36,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:14:36,945 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 12:14:36,960 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 12:14:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:14:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:14:36,976 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:14:36,976 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-15 12:14:36,976 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-15 12:14:36,976 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:14:36,977 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:14:36,977 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:14:36,977 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:14:36,977 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:14:36,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:14:36,977 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:14:36,977 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:14:36,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 12:14:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:14:36,978 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:14:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:14:36,978 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:14:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:14:36,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:14:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:14:36,978 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:14:37,051 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:14:37,053 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:14:37,549 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:14:37,556 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:14:37,556 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-15 12:14:37,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:14:37 BoogieIcfgContainer [2021-12-15 12:14:37,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:14:37,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:14:37,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:14:37,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:14:37,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:14:36" (1/3) ... [2021-12-15 12:14:37,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d7e668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:14:37, skipping insertion in model container [2021-12-15 12:14:37,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:36" (2/3) ... [2021-12-15 12:14:37,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d7e668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:14:37, skipping insertion in model container [2021-12-15 12:14:37,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:14:37" (3/3) ... [2021-12-15 12:14:37,568 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-1+token_ring.04.cil-1.c [2021-12-15 12:14:37,572 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:14:37,572 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:14:37,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:14:37,610 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 12:14:37,611 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:14:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 218 states have (on average 1.5963302752293578) internal successors, (348), 224 states have internal predecessors, (348), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 12:14:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 12:14:37,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:14:37,648 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] [2021-12-15 12:14:37,649 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:14:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:14:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash 310849250, now seen corresponding path program 1 times [2021-12-15 12:14:37,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 12:14:37,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824181642] [2021-12-15 12:14:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:14:37,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 12:14:37,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 12:14:37,667 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 12:14:37,668 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 12:14:37,713 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 12:14:37,905 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 12:14:37,906 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 12:14:37,909 INFO L158 Benchmark]: Toolchain (without parser) took 1480.38ms. Allocated memory was 60.8MB in the beginning and 81.8MB in the end (delta: 21.0MB). Free memory was 39.7MB in the beginning and 56.3MB in the end (delta: -16.6MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2021-12-15 12:14:37,910 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 43.5MB in the beginning and 43.4MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:14:37,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 362.23ms. Allocated memory is still 60.8MB. Free memory was 39.5MB in the beginning and 39.6MB in the end (delta: -75.5kB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-15 12:14:37,910 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.96ms. Allocated memory is still 60.8MB. Free memory was 39.4MB in the beginning and 36.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 12:14:37,911 INFO L158 Benchmark]: Boogie Preprocessor took 54.82ms. Allocated memory is still 60.8MB. Free memory was 36.3MB in the beginning and 33.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:14:37,911 INFO L158 Benchmark]: RCFGBuilder took 637.00ms. Allocated memory was 60.8MB in the beginning and 81.8MB in the end (delta: 21.0MB). Free memory was 33.4MB in the beginning and 43.3MB in the end (delta: -9.9MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2021-12-15 12:14:37,912 INFO L158 Benchmark]: TraceAbstraction took 345.70ms. Allocated memory is still 81.8MB. Free memory was 42.9MB in the beginning and 56.3MB in the end (delta: -13.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:14:37,914 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 43.5MB in the beginning and 43.4MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 362.23ms. Allocated memory is still 60.8MB. Free memory was 39.5MB in the beginning and 39.6MB in the end (delta: -75.5kB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.96ms. Allocated memory is still 60.8MB. Free memory was 39.4MB in the beginning and 36.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.82ms. Allocated memory is still 60.8MB. Free memory was 36.3MB in the beginning and 33.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 637.00ms. Allocated memory was 60.8MB in the beginning and 81.8MB in the end (delta: 21.0MB). Free memory was 33.4MB in the beginning and 43.3MB in the end (delta: -9.9MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. * TraceAbstraction took 345.70ms. Allocated memory is still 81.8MB. Free memory was 42.9MB in the beginning and 56.3MB in the end (delta: -13.4MB). There was no memory consumed. 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 12:14:37,950 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 Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable