./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+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_2.cil-2+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 8dee58858bceada86a9d77b57748794a4149b829dcc108044b7fcc9b2fa3dd4d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:15:40,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:15:40,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:15:40,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:15:40,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:15:40,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:15:40,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:15:40,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:15:40,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:15:40,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:15:40,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:15:40,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:15:40,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:15:40,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:15:40,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:15:40,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:15:40,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:15:40,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:15:40,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:15:40,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:15:40,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:15:40,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:15:40,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:15:40,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:15:40,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:15:40,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:15:40,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:15:40,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:15:40,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:15:40,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:15:40,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:15:40,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:15:40,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:15:40,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:15:40,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:15:40,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:15:40,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:15:40,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:15:40,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:15:40,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:15:40,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:15:40,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:15:40,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:15:40,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:15:40,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:15:40,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:15:40,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:15:40,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:15:40,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:15:40,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:15:40,225 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:15:40,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:15:40,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:15:40,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:15:40,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:15:40,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:15:40,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:15:40,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:15:40,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:15:40,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:15:40,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:15:40,227 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:15:40,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:15:40,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:15:40,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:15:40,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:15:40,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:40,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:15:40,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:15:40,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:15:40,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:15:40,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:15:40,230 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:15:40,231 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:15:40,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:15:40,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:15:40,231 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dee58858bceada86a9d77b57748794a4149b829dcc108044b7fcc9b2fa3dd4d [2021-12-15 12:15:40,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:15:40,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:15:40,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:15:40,494 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:15:40,494 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:15:40,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c [2021-12-15 12:15:40,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0acc5f4c6/4387b8c2b3af4110b0be7223e437a99e/FLAGd6c44a23c [2021-12-15 12:15:41,097 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:15:41,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c [2021-12-15 12:15:41,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0acc5f4c6/4387b8c2b3af4110b0be7223e437a99e/FLAGd6c44a23c [2021-12-15 12:15:41,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0acc5f4c6/4387b8c2b3af4110b0be7223e437a99e [2021-12-15 12:15:41,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:15:41,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:15:41,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:41,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:15:41,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:15:41,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:41,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f11796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41, skipping insertion in model container [2021-12-15 12:15:41,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:41,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:15:41,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:15:41,787 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c[914,927] [2021-12-15 12:15:41,854 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c[7125,7138] [2021-12-15 12:15:41,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:41,913 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:15:41,924 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c[914,927] [2021-12-15 12:15:41,950 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c[7125,7138] [2021-12-15 12:15:41,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:41,995 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:15:41,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41 WrapperNode [2021-12-15 12:15:41,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:41,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:41,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:15:41,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:15:42,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:42,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:42,065 INFO L137 Inliner]: procedures = 61, calls = 70, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 577 [2021-12-15 12:15:42,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:42,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:15:42,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:15:42,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:15:42,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:42,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:42,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:42,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:42,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:42,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:42,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:42,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:15:42,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:15:42,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:15:42,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:15:42,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (1/1) ... [2021-12-15 12:15:42,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:42,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:15:42,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 12:15:42,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 12:15:42,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:15:42,165 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:15:42,165 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:15:42,165 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-15 12:15:42,166 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-15 12:15:42,166 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:15:42,166 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:15:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:15:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:15:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-15 12:15:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-15 12:15:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:15:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:15:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:15:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:15:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-15 12:15:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-15 12:15:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-15 12:15:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-15 12:15:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-15 12:15:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-15 12:15:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:15:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:15:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:15:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:15:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:15:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-15 12:15:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-15 12:15:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:15:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:15:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:15:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:15:42,313 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:15:42,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:15:42,799 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:15:42,822 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:15:42,822 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-15 12:15:42,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:42 BoogieIcfgContainer [2021-12-15 12:15:42,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:15:42,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:15:42,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:15:42,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:15:42,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:15:41" (1/3) ... [2021-12-15 12:15:42,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49de6519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:42, skipping insertion in model container [2021-12-15 12:15:42,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:41" (2/3) ... [2021-12-15 12:15:42,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49de6519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:42, skipping insertion in model container [2021-12-15 12:15:42,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:42" (3/3) ... [2021-12-15 12:15:42,831 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-2+token_ring.04.cil-1.c [2021-12-15 12:15:42,835 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:15:42,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:15:42,913 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:15:42,918 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 12:15:42,918 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:15:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 284 states, 234 states have (on average 1.5854700854700854) internal successors, (371), 241 states have internal predecessors, (371), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-15 12:15:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 12:15:42,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:15:42,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:15:42,976 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:15:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:15:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1988134503, now seen corresponding path program 1 times [2021-12-15 12:15:42,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:15:42,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000066089] [2021-12-15 12:15:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:15:42,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:15:43,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:15:43,032 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 12:15:43,037 INFO L158 Benchmark]: Toolchain (without parser) took 1501.08ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 75.7MB in the beginning and 84.1MB in the end (delta: -8.3MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. [2021-12-15 12:15:43,037 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 104.9MB. Free memory was 61.3MB in the beginning and 61.3MB in the end (delta: 47.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:15:43,038 INFO L158 Benchmark]: CACSL2BoogieTranslator took 459.29ms. Allocated memory is still 104.9MB. Free memory was 75.5MB in the beginning and 73.5MB in the end (delta: 2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:15:43,038 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.79ms. Allocated memory is still 104.9MB. Free memory was 73.5MB in the beginning and 70.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:15:43,039 INFO L158 Benchmark]: Boogie Preprocessor took 30.40ms. Allocated memory is still 104.9MB. Free memory was 70.4MB in the beginning and 67.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 12:15:43,040 INFO L158 Benchmark]: RCFGBuilder took 727.21ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 67.3MB in the beginning and 95.4MB in the end (delta: -28.1MB). Peak memory consumption was 22.8MB. Max. memory is 16.1GB. [2021-12-15 12:15:43,040 INFO L158 Benchmark]: TraceAbstraction took 209.20ms. Allocated memory is still 132.1MB. Free memory was 94.6MB in the beginning and 84.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:15:43,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 104.9MB. Free memory was 61.3MB in the beginning and 61.3MB in the end (delta: 47.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 459.29ms. Allocated memory is still 104.9MB. Free memory was 75.5MB in the beginning and 73.5MB in the end (delta: 2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.79ms. Allocated memory is still 104.9MB. Free memory was 73.5MB in the beginning and 70.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.40ms. Allocated memory is still 104.9MB. Free memory was 70.4MB in the beginning and 67.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 727.21ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 67.3MB in the beginning and 95.4MB in the end (delta: -28.1MB). Peak memory consumption was 22.8MB. Max. memory is 16.1GB. * TraceAbstraction took 209.20ms. Allocated memory is still 132.1MB. Free memory was 94.6MB in the beginning and 84.1MB 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 12:15:43,086 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_2.cil-2+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 8dee58858bceada86a9d77b57748794a4149b829dcc108044b7fcc9b2fa3dd4d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:15:44,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:15:44,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:15:44,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:15:44,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:15:44,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:15:44,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:15:44,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:15:44,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:15:44,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:15:44,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:15:44,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:15:44,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:15:45,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:15:45,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:15:45,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:15:45,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:15:45,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:15:45,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:15:45,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:15:45,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:15:45,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:15:45,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:15:45,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:15:45,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:15:45,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:15:45,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:15:45,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:15:45,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:15:45,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:15:45,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:15:45,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:15:45,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:15:45,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:15:45,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:15:45,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:15:45,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:15:45,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:15:45,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:15:45,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:15:45,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:15:45,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 12:15:45,075 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:15:45,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:15:45,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:15:45,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:15:45,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:15:45,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:15:45,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:15:45,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:15:45,078 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:15:45,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:15:45,079 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:15:45,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:15:45,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:15:45,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:15:45,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:15:45,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:15:45,081 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 12:15:45,081 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 12:15:45,081 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 12:15:45,081 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:15:45,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:15:45,081 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:15:45,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:15:45,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:15:45,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:15:45,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:15:45,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:45,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:15:45,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:15:45,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:15:45,092 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 12:15:45,092 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 12:15:45,092 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:15:45,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:15:45,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:15:45,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:15:45,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 12:15:45,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dee58858bceada86a9d77b57748794a4149b829dcc108044b7fcc9b2fa3dd4d [2021-12-15 12:15:45,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:15:45,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:15:45,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:15:45,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:15:45,427 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:15:45,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c [2021-12-15 12:15:45,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18167744a/076f76eb02944df5acf284d65bd412e7/FLAGcab7e23d7 [2021-12-15 12:15:45,959 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:15:45,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c [2021-12-15 12:15:45,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18167744a/076f76eb02944df5acf284d65bd412e7/FLAGcab7e23d7 [2021-12-15 12:15:45,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18167744a/076f76eb02944df5acf284d65bd412e7 [2021-12-15 12:15:45,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:15:45,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:15:45,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:45,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:15:46,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:15:46,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:45" (1/1) ... [2021-12-15 12:15:46,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41662b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46, skipping insertion in model container [2021-12-15 12:15:46,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:45" (1/1) ... [2021-12-15 12:15:46,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:15:46,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:15:46,184 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c[914,927] [2021-12-15 12:15:46,250 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c[7125,7138] [2021-12-15 12:15:46,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:46,314 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:15:46,332 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c[914,927] [2021-12-15 12:15:46,374 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-2+token_ring.04.cil-1.c[7125,7138] [2021-12-15 12:15:46,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:46,436 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:15:46,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46 WrapperNode [2021-12-15 12:15:46,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:46,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:46,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:15:46,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:15:46,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (1/1) ... [2021-12-15 12:15:46,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (1/1) ... [2021-12-15 12:15:46,513 INFO L137 Inliner]: procedures = 62, calls = 70, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 554 [2021-12-15 12:15:46,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:46,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:15:46,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:15:46,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:15:46,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (1/1) ... [2021-12-15 12:15:46,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (1/1) ... [2021-12-15 12:15:46,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (1/1) ... [2021-12-15 12:15:46,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (1/1) ... [2021-12-15 12:15:46,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (1/1) ... [2021-12-15 12:15:46,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (1/1) ... [2021-12-15 12:15:46,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (1/1) ... [2021-12-15 12:15:46,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:15:46,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:15:46,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:15:46,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:15:46,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (1/1) ... [2021-12-15 12:15:46,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:46,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:15:46,629 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 12:15:46,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 12:15:46,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:15:46,664 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:15:46,665 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:15:46,665 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-15 12:15:46,665 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-15 12:15:46,665 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:15:46,665 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:15:46,665 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:15:46,666 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:15:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-15 12:15:46,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-15 12:15:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:15:46,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:15:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:15:46,667 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:15:46,667 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-15 12:15:46,667 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-15 12:15:46,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 12:15:46,667 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-15 12:15:46,668 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-15 12:15:46,668 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-15 12:15:46,668 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-15 12:15:46,668 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:15:46,668 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:15:46,668 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:15:46,669 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:15:46,669 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-15 12:15:46,669 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-15 12:15:46,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:15:46,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:15:46,670 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:15:46,670 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:15:46,786 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:15:46,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:15:47,408 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:15:47,416 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:15:47,416 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-15 12:15:47,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:47 BoogieIcfgContainer [2021-12-15 12:15:47,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:15:47,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:15:47,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:15:47,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:15:47,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:15:45" (1/3) ... [2021-12-15 12:15:47,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b43daac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:47, skipping insertion in model container [2021-12-15 12:15:47,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:46" (2/3) ... [2021-12-15 12:15:47,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b43daac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:47, skipping insertion in model container [2021-12-15 12:15:47,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:47" (3/3) ... [2021-12-15 12:15:47,424 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-2+token_ring.04.cil-1.c [2021-12-15 12:15:47,428 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:15:47,428 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:15:47,463 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:15:47,470 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 12:15:47,470 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:15:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand has 284 states, 234 states have (on average 1.5854700854700854) internal successors, (371), 241 states have internal predecessors, (371), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-15 12:15:47,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 12:15:47,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:15:47,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:15:47,508 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:15:47,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:15:47,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1988134503, now seen corresponding path program 1 times [2021-12-15 12:15:47,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 12:15:47,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164325795] [2021-12-15 12:15:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:15:47,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 12:15:47,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 12:15:47,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 12:15:47,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 12:15:47,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 12:15:47,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 12:15:47,788 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 12:15:47,792 INFO L158 Benchmark]: Toolchain (without parser) took 1797.26ms. Allocated memory was 52.4MB in the beginning and 73.4MB in the end (delta: 21.0MB). Free memory was 28.8MB in the beginning and 39.9MB in the end (delta: -11.1MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2021-12-15 12:15:47,793 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 52.4MB. Free memory was 34.7MB in the beginning and 34.7MB in the end (delta: 39.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:15:47,793 INFO L158 Benchmark]: CACSL2BoogieTranslator took 441.47ms. Allocated memory was 52.4MB in the beginning and 73.4MB in the end (delta: 21.0MB). Free memory was 28.6MB in the beginning and 51.8MB in the end (delta: -23.2MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2021-12-15 12:15:47,794 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.42ms. Allocated memory is still 73.4MB. Free memory was 51.8MB in the beginning and 48.4MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 12:15:47,794 INFO L158 Benchmark]: Boogie Preprocessor took 67.74ms. Allocated memory is still 73.4MB. Free memory was 48.4MB in the beginning and 45.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:15:47,795 INFO L158 Benchmark]: RCFGBuilder took 832.01ms. Allocated memory is still 73.4MB. Free memory was 45.3MB in the beginning and 50.8MB in the end (delta: -5.5MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2021-12-15 12:15:47,799 INFO L158 Benchmark]: TraceAbstraction took 371.51ms. Allocated memory is still 73.4MB. Free memory was 50.1MB in the beginning and 39.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:15:47,804 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 52.4MB. Free memory was 34.7MB in the beginning and 34.7MB in the end (delta: 39.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 441.47ms. Allocated memory was 52.4MB in the beginning and 73.4MB in the end (delta: 21.0MB). Free memory was 28.6MB in the beginning and 51.8MB in the end (delta: -23.2MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 78.42ms. Allocated memory is still 73.4MB. Free memory was 51.8MB in the beginning and 48.4MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.74ms. Allocated memory is still 73.4MB. Free memory was 48.4MB in the beginning and 45.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 832.01ms. Allocated memory is still 73.4MB. Free memory was 45.3MB in the beginning and 50.8MB in the end (delta: -5.5MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * TraceAbstraction took 371.51ms. Allocated memory is still 73.4MB. Free memory was 50.1MB in the beginning and 39.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 12:15:47,883 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