./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.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.02.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 a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:14:54,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:14:54,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:14:54,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:14:54,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:14:54,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:14:54,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:14:54,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:14:54,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:14:54,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:14:54,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:14:54,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:14:54,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:14:54,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:14:54,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:14:54,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:14:54,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:14:54,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:14:54,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:14:54,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:14:54,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:14:54,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:14:54,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:14:54,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:14:54,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:14:54,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:14:54,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:14:54,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:14:54,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:14:54,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:14:54,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:14:54,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:14:54,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:14:54,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:14:54,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:14:54,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:14:54,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:14:54,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:14:54,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:14:54,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:14:54,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:14:54,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:14:54,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:14:54,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:14:54,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:14:54,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:14:54,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:14:54,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:14:54,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:14:54,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:14:54,244 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:14:54,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:14:54,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:14:54,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:14:54,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:14:54,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:14:54,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:14:54,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:14:54,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:14:54,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:14:54,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:14:54,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:14:54,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:14:54,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:14:54,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:14:54,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:14:54,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:54,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:14:54,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:14:54,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:14:54,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:14:54,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:14:54,248 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:14:54,248 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:14:54,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:14:54,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:14:54,248 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb [2021-12-15 12:14:54,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:14:54,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:14:54,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:14:54,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:14:54,449 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:14:54,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-15 12:14:54,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ba12e13/a175f048c5204489a47c4a04fa21bcf7/FLAG287295fde [2021-12-15 12:14:54,918 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:14:54,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-15 12:14:54,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ba12e13/a175f048c5204489a47c4a04fa21bcf7/FLAG287295fde [2021-12-15 12:14:54,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ba12e13/a175f048c5204489a47c4a04fa21bcf7 [2021-12-15 12:14:54,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:14:54,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:14:54,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:54,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:14:54,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:14:54,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519c55d7 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 12:14:54,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:54" (1/1) ... [2021-12-15 12:14:54,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:14:54,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:14:55,113 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.02.cil-2.c[913,926] [2021-12-15 12:14:55,170 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.02.cil-2.c[5977,5990] [2021-12-15 12:14:55,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:55,209 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:14:55,216 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.02.cil-2.c[913,926] [2021-12-15 12:14:55,233 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.02.cil-2.c[5977,5990] [2021-12-15 12:14:55,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:55,261 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:14:55,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55 WrapperNode [2021-12-15 12:14:55,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:55,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:55,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:14:55,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:14:55,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (1/1) ... [2021-12-15 12:14:55,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (1/1) ... [2021-12-15 12:14:55,310 INFO L137 Inliner]: procedures = 52, calls = 55, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 480 [2021-12-15 12:14:55,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:55,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:14:55,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:14:55,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:14:55,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (1/1) ... [2021-12-15 12:14:55,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (1/1) ... [2021-12-15 12:14:55,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (1/1) ... [2021-12-15 12:14:55,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (1/1) ... [2021-12-15 12:14:55,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (1/1) ... [2021-12-15 12:14:55,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (1/1) ... [2021-12-15 12:14:55,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (1/1) ... [2021-12-15 12:14:55,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:14:55,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:14:55,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:14:55,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:14:55,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (1/1) ... [2021-12-15 12:14:55,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:55,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:14:55,374 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 12:14:55,381 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 12:14:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:14:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:14:55,399 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:14:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-15 12:14:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-15 12:14:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:14:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:14:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:14:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:14:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:14:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:14:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:14:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:14:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:14:55,401 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:14:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:14:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:14:55,401 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:14:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:14:55,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:14:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:14:55,402 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:14:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-15 12:14:55,402 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-15 12:14:55,473 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:14:55,475 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:14:55,817 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:14:55,822 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:14:55,823 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-15 12:14:55,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:14:55 BoogieIcfgContainer [2021-12-15 12:14:55,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:14:55,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:14:55,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:14:55,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:14:55,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:14:54" (1/3) ... [2021-12-15 12:14:55,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34412b31 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 12:14:55,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:55" (2/3) ... [2021-12-15 12:14:55,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34412b31 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 12:14:55,829 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 12:14:55,830 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-15 12:14:55,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:14:55,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:14:55,863 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:14:55,868 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 12:14:55,869 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:14:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 175 states have (on average 1.5771428571428572) internal successors, (276), 182 states have internal predecessors, (276), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-15 12:14:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 12:14:55,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:14:55,888 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 12:14:55,889 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:14:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:14:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2045589042, now seen corresponding path program 1 times [2021-12-15 12:14:55,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:14:55,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742771365] [2021-12-15 12:14:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:14:55,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:14:55,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:14:55,938 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 12:14:55,941 INFO L158 Benchmark]: Toolchain (without parser) took 994.10ms. Allocated memory is still 117.4MB. Free memory was 83.7MB in the beginning and 47.6MB in the end (delta: 36.1MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,942 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 75.5MB. Free memory is still 35.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:14:55,942 INFO L158 Benchmark]: CACSL2BoogieTranslator took 313.92ms. Allocated memory is still 117.4MB. Free memory was 83.7MB in the beginning and 87.3MB in the end (delta: -3.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,942 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.36ms. Allocated memory is still 117.4MB. Free memory was 87.3MB in the beginning and 84.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,943 INFO L158 Benchmark]: Boogie Preprocessor took 37.73ms. Allocated memory is still 117.4MB. Free memory was 84.6MB in the beginning and 82.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,943 INFO L158 Benchmark]: RCFGBuilder took 474.68ms. Allocated memory is still 117.4MB. Free memory was 82.5MB in the beginning and 58.0MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,944 INFO L158 Benchmark]: TraceAbstraction took 114.62ms. Allocated memory is still 117.4MB. Free memory was 58.0MB in the beginning and 47.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:14:55,945 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 75.5MB. Free memory is still 35.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 313.92ms. Allocated memory is still 117.4MB. Free memory was 83.7MB in the beginning and 87.3MB in the end (delta: -3.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.36ms. Allocated memory is still 117.4MB. Free memory was 87.3MB in the beginning and 84.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.73ms. Allocated memory is still 117.4MB. Free memory was 84.6MB in the beginning and 82.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 474.68ms. Allocated memory is still 117.4MB. Free memory was 82.5MB in the beginning and 58.0MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 114.62ms. Allocated memory is still 117.4MB. Free memory was 58.0MB in the beginning and 47.6MB in the end (delta: 10.5MB). 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 12:14:55,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.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 a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:14:57,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:14:57,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:14:57,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:14:57,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:14:57,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:14:57,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:14:57,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:14:57,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:14:57,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:14:57,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:14:57,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:14:57,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:14:57,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:14:57,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:14:57,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:14:57,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:14:57,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:14:57,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:14:57,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:14:57,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:14:57,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:14:57,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:14:57,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:14:57,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:14:57,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:14:57,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:14:57,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:14:57,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:14:57,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:14:57,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:14:57,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:14:57,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:14:57,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:14:57,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:14:57,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:14:57,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:14:57,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:14:57,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:14:57,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:14:57,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:14:57,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 12:14:57,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:14:57,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:14:57,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:14:57,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:14:57,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:14:57,694 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:14:57,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:14:57,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:14:57,695 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:14:57,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:14:57,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:14:57,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:14:57,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:14:57,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:14:57,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:14:57,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:14:57,697 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 12:14:57,697 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 12:14:57,697 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 12:14:57,697 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:14:57,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:14:57,697 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:14:57,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:14:57,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:14:57,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:14:57,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:14:57,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:57,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:14:57,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:14:57,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:14:57,698 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 12:14:57,699 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 12:14:57,699 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:14:57,699 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:14:57,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:14:57,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:14:57,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 12:14:57,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb [2021-12-15 12:14:57,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:14:57,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:14:57,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:14:57,961 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:14:57,961 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:14:57,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-15 12:14:58,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d02eaf4b/8f20212cb1364084bbf6667c1060184c/FLAG31e4570ba [2021-12-15 12:14:58,387 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:14:58,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-15 12:14:58,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d02eaf4b/8f20212cb1364084bbf6667c1060184c/FLAG31e4570ba [2021-12-15 12:14:58,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d02eaf4b/8f20212cb1364084bbf6667c1060184c [2021-12-15 12:14:58,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:14:58,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:14:58,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:58,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:14:58,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:14:58,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7194195b 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 12:14:58,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:14:58,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:14:58,582 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.02.cil-2.c[913,926] [2021-12-15 12:14:58,647 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.02.cil-2.c[5977,5990] [2021-12-15 12:14:58,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:58,704 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:14:58,716 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.02.cil-2.c[913,926] [2021-12-15 12:14:58,737 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.02.cil-2.c[5977,5990] [2021-12-15 12:14:58,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:14:58,779 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:14:58,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58 WrapperNode [2021-12-15 12:14:58,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:14:58,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:58,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:14:58,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:14:58,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,832 INFO L137 Inliner]: procedures = 53, calls = 55, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 458 [2021-12-15 12:14:58,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:14:58,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:14:58,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:14:58,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:14:58,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:14:58,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:14:58,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:14:58,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:14:58,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (1/1) ... [2021-12-15 12:14:58,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:14:58,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:14:58,906 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 12:14:58,913 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 12:14:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:14:58,931 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:14:58,931 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:14:58,931 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-15 12:14:58,931 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-15 12:14:58,931 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:14:58,931 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:14:58,931 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:14:58,932 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:14:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:14:58,932 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:14:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:14:58,932 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:14:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 12:14:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:14:58,932 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:14:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:14:58,933 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:14:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:14:58,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:14:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:14:58,933 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:14:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-15 12:14:58,933 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-15 12:14:59,012 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:14:59,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:14:59,365 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:14:59,371 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:14:59,375 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-15 12:14:59,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:14:59 BoogieIcfgContainer [2021-12-15 12:14:59,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:14:59,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:14:59,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:14:59,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:14:59,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:14:58" (1/3) ... [2021-12-15 12:14:59,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e06e37 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 12:14:59,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:14:58" (2/3) ... [2021-12-15 12:14:59,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e06e37 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 12:14:59,400 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 12:14:59,402 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-15 12:14:59,405 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:14:59,405 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:14:59,454 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:14:59,462 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 12:14:59,463 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:14:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 175 states have (on average 1.5771428571428572) internal successors, (276), 182 states have internal predecessors, (276), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-15 12:14:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 12:14:59,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:14:59,489 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 12:14:59,489 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:14:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:14:59,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2045589042, now seen corresponding path program 1 times [2021-12-15 12:14:59,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 12:14:59,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066359713] [2021-12-15 12:14:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:14:59,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 12:14:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 12:14:59,506 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 12:14:59,533 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 12:14:59,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 12:14:59,757 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 12:14:59,758 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 12:14:59,762 INFO L158 Benchmark]: Toolchain (without parser) took 1350.53ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 35.0MB in the beginning and 39.6MB in the end (delta: -4.5MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2021-12-15 12:14:59,763 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 56.6MB. Free memory was 38.7MB in the beginning and 38.7MB in the end (delta: 46.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:14:59,764 INFO L158 Benchmark]: CACSL2BoogieTranslator took 367.79ms. Allocated memory is still 56.6MB. Free memory was 34.9MB in the beginning and 34.2MB in the end (delta: 691.3kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-15 12:14:59,764 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.14ms. Allocated memory is still 56.6MB. Free memory was 34.2MB in the beginning and 31.3MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:14:59,765 INFO L158 Benchmark]: Boogie Preprocessor took 49.06ms. Allocated memory is still 56.6MB. Free memory was 31.3MB in the beginning and 28.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:14:59,765 INFO L158 Benchmark]: RCFGBuilder took 493.64ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 28.8MB in the beginning and 32.6MB in the end (delta: -3.8MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-12-15 12:14:59,766 INFO L158 Benchmark]: TraceAbstraction took 365.45ms. Allocated memory is still 69.2MB. Free memory was 49.3MB in the beginning and 39.6MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 12:14:59,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 56.6MB. Free memory was 38.7MB in the beginning and 38.7MB in the end (delta: 46.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 367.79ms. Allocated memory is still 56.6MB. Free memory was 34.9MB in the beginning and 34.2MB in the end (delta: 691.3kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.14ms. Allocated memory is still 56.6MB. Free memory was 34.2MB in the beginning and 31.3MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.06ms. Allocated memory is still 56.6MB. Free memory was 31.3MB in the beginning and 28.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 493.64ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 28.8MB in the beginning and 32.6MB in the end (delta: -3.8MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * TraceAbstraction took 365.45ms. Allocated memory is still 69.2MB. Free memory was 49.3MB in the beginning and 39.6MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. 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 12:14:59,799 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