./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.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 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:15:20,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:15:20,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:15:21,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:15:21,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:15:21,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:15:21,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:15:21,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:15:21,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:15:21,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:15:21,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:15:21,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:15:21,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:15:21,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:15:21,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:15:21,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:15:21,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:15:21,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:15:21,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:15:21,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:15:21,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:15:21,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:15:21,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:15:21,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:15:21,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:15:21,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:15:21,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:15:21,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:15:21,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:15:21,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:15:21,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:15:21,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:15:21,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:15:21,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:15:21,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:15:21,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:15:21,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:15:21,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:15:21,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:15:21,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:15:21,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:15:21,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:15:21,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:15:21,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:15:21,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:15:21,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:15:21,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:15:21,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:15:21,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:15:21,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:15:21,121 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:15:21,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:15:21,122 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:15:21,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:15:21,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:15:21,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:15:21,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:15:21,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:15:21,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:15:21,123 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:15:21,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:15:21,124 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:15:21,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:15:21,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:15:21,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:15:21,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:15:21,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:21,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:15:21,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:15:21,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:15:21,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:15:21,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:15:21,126 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:15:21,126 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:15:21,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:15:21,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:15:21,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 [2021-12-15 12:15:21,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:15:21,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:15:21,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:15:21,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:15:21,407 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:15:21,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2021-12-15 12:15:21,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73130365c/cef78fabb9d7495c86acbcc733dacd3e/FLAG1eafbcfc0 [2021-12-15 12:15:21,961 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:15:21,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2021-12-15 12:15:21,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73130365c/cef78fabb9d7495c86acbcc733dacd3e/FLAG1eafbcfc0 [2021-12-15 12:15:22,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73130365c/cef78fabb9d7495c86acbcc733dacd3e [2021-12-15 12:15:22,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:15:22,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:15:22,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:22,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:15:22,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:15:22,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32dc1ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22, skipping insertion in model container [2021-12-15 12:15:22,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:15:22,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:15:22,530 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2021-12-15 12:15:22,567 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2021-12-15 12:15:22,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:22,614 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:15:22,624 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2021-12-15 12:15:22,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2021-12-15 12:15:22,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:22,710 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:15:22,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22 WrapperNode [2021-12-15 12:15:22,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:22,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:22,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:15:22,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:15:22,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,765 INFO L137 Inliner]: procedures = 59, calls = 66, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 518 [2021-12-15 12:15:22,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:22,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:15:22,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:15:22,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:15:22,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:15:22,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:15:22,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:15:22,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:15:22,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (1/1) ... [2021-12-15 12:15:22,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:22,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:15:22,851 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 12:15:22,853 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 12:15:22,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:15:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:15:22,886 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:15:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-15 12:15:22,888 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-15 12:15:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:15:22,888 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:15:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:15:22,888 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:15:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-15 12:15:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-15 12:15:22,889 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:15:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:15:22,889 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:15:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:15:22,889 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-15 12:15:22,890 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-15 12:15:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-15 12:15:22,890 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-15 12:15:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-15 12:15:22,890 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-15 12:15:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:15:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:15:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:15:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:15:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:15:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-15 12:15:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-15 12:15:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:15:22,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:15:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:15:22,892 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:15:23,047 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:15:23,049 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:15:23,504 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:15:23,514 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:15:23,514 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-15 12:15:23,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:23 BoogieIcfgContainer [2021-12-15 12:15:23,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:15:23,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:15:23,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:15:23,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:15:23,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:15:22" (1/3) ... [2021-12-15 12:15:23,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d67e736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:23, skipping insertion in model container [2021-12-15 12:15:23,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:22" (2/3) ... [2021-12-15 12:15:23,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d67e736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:23, skipping insertion in model container [2021-12-15 12:15:23,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:23" (3/3) ... [2021-12-15 12:15:23,528 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2021-12-15 12:15:23,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:15:23,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:15:23,571 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:15:23,575 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 12:15:23,576 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:15:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 210 states have (on average 1.5714285714285714) internal successors, (330), 216 states have internal predecessors, (330), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-15 12:15:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 12:15:23,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:15:23,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:15:23,601 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:15:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:15:23,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2111945575, now seen corresponding path program 1 times [2021-12-15 12:15:23,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:15:23,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969181899] [2021-12-15 12:15:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:15:23,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:15:23,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:15:23,671 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 12:15:23,680 INFO L158 Benchmark]: Toolchain (without parser) took 1351.21ms. Allocated memory was 86.0MB in the beginning and 115.3MB in the end (delta: 29.4MB). Free memory was 53.3MB in the beginning and 41.4MB in the end (delta: 11.9MB). Peak memory consumption was 39.1MB. Max. memory is 16.1GB. [2021-12-15 12:15:23,681 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 86.0MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:15:23,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 381.93ms. Allocated memory was 86.0MB in the beginning and 115.3MB in the end (delta: 29.4MB). Free memory was 53.0MB in the beginning and 84.8MB in the end (delta: -31.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:15:23,683 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.64ms. Allocated memory is still 115.3MB. Free memory was 84.8MB in the beginning and 81.9MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 12:15:23,683 INFO L158 Benchmark]: Boogie Preprocessor took 40.97ms. Allocated memory is still 115.3MB. Free memory was 81.9MB in the beginning and 79.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:15:23,684 INFO L158 Benchmark]: RCFGBuilder took 708.46ms. Allocated memory is still 115.3MB. Free memory was 79.1MB in the beginning and 52.5MB in the end (delta: 26.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2021-12-15 12:15:23,689 INFO L158 Benchmark]: TraceAbstraction took 159.89ms. Allocated memory is still 115.3MB. Free memory was 51.9MB in the beginning and 41.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 12:15:23,694 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 86.0MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 381.93ms. Allocated memory was 86.0MB in the beginning and 115.3MB in the end (delta: 29.4MB). Free memory was 53.0MB in the beginning and 84.8MB in the end (delta: -31.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.64ms. Allocated memory is still 115.3MB. Free memory was 84.8MB in the beginning and 81.9MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.97ms. Allocated memory is still 115.3MB. Free memory was 81.9MB in the beginning and 79.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 708.46ms. Allocated memory is still 115.3MB. Free memory was 79.1MB in the beginning and 52.5MB in the end (delta: 26.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 159.89ms. Allocated memory is still 115.3MB. Free memory was 51.9MB in the beginning and 41.4MB 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 12:15:23,725 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-1+token_ring.03.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 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:15:25,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:15:25,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:15:25,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:15:25,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:15:25,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:15:25,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:15:25,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:15:25,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:15:25,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:15:25,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:15:25,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:15:25,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:15:25,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:15:25,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:15:25,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:15:25,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:15:25,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:15:25,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:15:25,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:15:25,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:15:25,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:15:25,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:15:25,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:15:25,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:15:25,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:15:25,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:15:25,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:15:25,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:15:25,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:15:25,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:15:25,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:15:25,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:15:25,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:15:25,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:15:25,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:15:25,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:15:25,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:15:25,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:15:25,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:15:25,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:15:25,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 12:15:25,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:15:25,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:15:25,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:15:25,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:15:25,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:15:25,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:15:25,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:15:25,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:15:25,826 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:15:25,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:15:25,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:15:25,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:15:25,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:15:25,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:15:25,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:15:25,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:15:25,828 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 12:15:25,828 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 12:15:25,829 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 12:15:25,829 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:15:25,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:15:25,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:15:25,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:15:25,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:15:25,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:15:25,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:15:25,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:25,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:15:25,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:15:25,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:15:25,831 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 12:15:25,831 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 12:15:25,831 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:15:25,832 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:15:25,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:15:25,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:15:25,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 12:15:25,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 [2021-12-15 12:15:26,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:15:26,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:15:26,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:15:26,171 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:15:26,171 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:15:26,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2021-12-15 12:15:26,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263f57982/3eb6e8fd4f2b40e8866b2169de57b089/FLAGe188f3137 [2021-12-15 12:15:26,729 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:15:26,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2021-12-15 12:15:26,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263f57982/3eb6e8fd4f2b40e8866b2169de57b089/FLAGe188f3137 [2021-12-15 12:15:27,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263f57982/3eb6e8fd4f2b40e8866b2169de57b089 [2021-12-15 12:15:27,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:15:27,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:15:27,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:27,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:15:27,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:15:27,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcaec88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27, skipping insertion in model container [2021-12-15 12:15:27,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:15:27,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:15:27,463 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2021-12-15 12:15:27,539 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2021-12-15 12:15:27,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:27,585 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:15:27,595 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2021-12-15 12:15:27,629 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2021-12-15 12:15:27,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:15:27,676 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:15:27,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27 WrapperNode [2021-12-15 12:15:27,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:15:27,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:27,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:15:27,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:15:27,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,732 INFO L137 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 497 [2021-12-15 12:15:27,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:15:27,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:15:27,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:15:27,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:15:27,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:15:27,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:15:27,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:15:27,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:15:27,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (1/1) ... [2021-12-15 12:15:27,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:15:27,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:15:27,833 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 12:15:27,860 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 12:15:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:15:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-15 12:15:27,886 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-15 12:15:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-15 12:15:27,886 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-15 12:15:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-15 12:15:27,886 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-15 12:15:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-15 12:15:27,887 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-15 12:15:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-15 12:15:27,887 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-15 12:15:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-15 12:15:27,888 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-15 12:15:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-15 12:15:27,889 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-15 12:15:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-15 12:15:27,889 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-15 12:15:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 12:15:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-15 12:15:27,889 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-15 12:15:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-15 12:15:27,890 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-15 12:15:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-15 12:15:27,890 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-15 12:15:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-15 12:15:27,890 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-15 12:15:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-15 12:15:27,891 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-15 12:15:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:15:27,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:15:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-15 12:15:27,892 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-15 12:15:27,979 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:15:27,997 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:15:28,494 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:15:28,504 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:15:28,507 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-15 12:15:28,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:28 BoogieIcfgContainer [2021-12-15 12:15:28,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:15:28,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:15:28,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:15:28,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:15:28,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:15:27" (1/3) ... [2021-12-15 12:15:28,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7786b3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:28, skipping insertion in model container [2021-12-15 12:15:28,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:15:27" (2/3) ... [2021-12-15 12:15:28,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7786b3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:15:28, skipping insertion in model container [2021-12-15 12:15:28,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:15:28" (3/3) ... [2021-12-15 12:15:28,521 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2021-12-15 12:15:28,526 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:15:28,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:15:28,580 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:15:28,585 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 12:15:28,585 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:15:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 210 states have (on average 1.5714285714285714) internal successors, (330), 216 states have internal predecessors, (330), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-15 12:15:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 12:15:28,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:15:28,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:15:28,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:15:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:15:28,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2111945575, now seen corresponding path program 1 times [2021-12-15 12:15:28,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 12:15:28,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160043412] [2021-12-15 12:15:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:15:28,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 12:15:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 12:15:28,636 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 12:15:28,648 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 12:15:28,725 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 12:15:28,916 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 12:15:28,916 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 12:15:28,923 INFO L158 Benchmark]: Toolchain (without parser) took 1657.73ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.0MB in the beginning and 45.7MB in the end (delta: -14.7MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. [2021-12-15 12:15:28,923 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory was 37.0MB in the beginning and 36.9MB in the end (delta: 37.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 12:15:28,924 INFO L158 Benchmark]: CACSL2BoogieTranslator took 409.79ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 30.8MB in the beginning and 43.4MB in the end (delta: -12.6MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2021-12-15 12:15:28,925 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.11ms. Allocated memory is still 67.1MB. Free memory was 43.2MB in the beginning and 40.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:15:28,926 INFO L158 Benchmark]: Boogie Preprocessor took 39.13ms. Allocated memory is still 67.1MB. Free memory was 40.3MB in the beginning and 37.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 12:15:28,927 INFO L158 Benchmark]: RCFGBuilder took 734.15ms. Allocated memory is still 67.1MB. Free memory was 37.5MB in the beginning and 40.7MB in the end (delta: -3.2MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2021-12-15 12:15:28,927 INFO L158 Benchmark]: TraceAbstraction took 406.87ms. Allocated memory is still 67.1MB. Free memory was 40.2MB in the beginning and 45.7MB in the end (delta: -5.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 12:15:28,930 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory was 37.0MB in the beginning and 36.9MB in the end (delta: 37.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 409.79ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 30.8MB in the beginning and 43.4MB in the end (delta: -12.6MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.11ms. Allocated memory is still 67.1MB. Free memory was 43.2MB in the beginning and 40.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.13ms. Allocated memory is still 67.1MB. Free memory was 40.3MB in the beginning and 37.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 734.15ms. Allocated memory is still 67.1MB. Free memory was 37.5MB in the beginning and 40.7MB in the end (delta: -3.2MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * TraceAbstraction took 406.87ms. Allocated memory is still 67.1MB. Free memory was 40.2MB in the beginning and 45.7MB in the end (delta: -5.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 12:15:28,968 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