./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.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/recursive-simple/fibo_2calls_8-1.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 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:11:44,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:11:44,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:11:44,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:11:44,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:11:44,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:11:44,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:11:44,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:11:44,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:11:44,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:11:44,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:11:44,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:11:44,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:11:44,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:11:44,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:11:44,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:11:44,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:11:44,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:11:44,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:11:44,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:11:44,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:11:44,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:11:44,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:11:44,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:11:44,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:11:44,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:11:44,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:11:44,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:11:44,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:11:44,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:11:44,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:11:44,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:11:44,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:11:44,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:11:44,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:11:44,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:11:44,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:11:44,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:11:44,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:11:44,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:11:44,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:11:44,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:11:44,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:11:44,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:11:44,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:11:44,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:11:44,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:11:44,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:11:44,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:11:44,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:11:44,466 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:11:44,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:11:44,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:11:44,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:11:44,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:11:44,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:11:44,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:11:44,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:11:44,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:11:44,468 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:11:44,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:11:44,468 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:11:44,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:11:44,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:11:44,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:11:44,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:11:44,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:44,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:11:44,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:11:44,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:11:44,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:11:44,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:11:44,471 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:11:44,471 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:11:44,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:11:44,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:11:44,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 [2021-12-15 11:11:44,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:11:44,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:11:44,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:11:44,680 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:11:44,681 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:11:44,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2021-12-15 11:11:44,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e5bcd6ca/8e7b48c3bd4846318ceddd5acb5351f1/FLAGd21db42b5 [2021-12-15 11:11:45,083 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:11:45,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2021-12-15 11:11:45,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e5bcd6ca/8e7b48c3bd4846318ceddd5acb5351f1/FLAGd21db42b5 [2021-12-15 11:11:45,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e5bcd6ca/8e7b48c3bd4846318ceddd5acb5351f1 [2021-12-15 11:11:45,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:11:45,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:11:45,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:45,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:11:45,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:11:45,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48847892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45, skipping insertion in model container [2021-12-15 11:11:45,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:11:45,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:11:45,691 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/recursive-simple/fibo_2calls_8-1.c[947,960] [2021-12-15 11:11:45,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:45,700 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:11:45,714 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/recursive-simple/fibo_2calls_8-1.c[947,960] [2021-12-15 11:11:45,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:45,728 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:11:45,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45 WrapperNode [2021-12-15 11:11:45,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:45,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:45,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:11:45,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:11:45,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,760 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-12-15 11:11:45,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:45,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:11:45,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:11:45,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:11:45,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:11:45,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:11:45,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:11:45,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:11:45,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (1/1) ... [2021-12-15 11:11:45,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:45,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:11:45,846 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 11:11:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:11:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:11:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-15 11:11:45,886 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-15 11:11:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-15 11:11:45,886 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-15 11:11:45,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:11:45,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:11:45,878 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 11:11:45,950 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:11:45,952 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:11:46,039 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:11:46,043 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:11:46,043 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:11:46,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:46 BoogieIcfgContainer [2021-12-15 11:11:46,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:11:46,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:11:46,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:11:46,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:11:46,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:11:45" (1/3) ... [2021-12-15 11:11:46,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5ece63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:46, skipping insertion in model container [2021-12-15 11:11:46,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45" (2/3) ... [2021-12-15 11:11:46,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5ece63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:46, skipping insertion in model container [2021-12-15 11:11:46,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:46" (3/3) ... [2021-12-15 11:11:46,051 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2021-12-15 11:11:46,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:11:46,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:11:46,082 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:11:46,087 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 11:11:46,087 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:11:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-15 11:11:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 11:11:46,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:11:46,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:11:46,101 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:11:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:11:46,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-12-15 11:11:46,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:11:46,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753420333] [2021-12-15 11:11:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:11:46,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:11:46,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:11:46,147 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 11:11:46,151 INFO L158 Benchmark]: Toolchain (without parser) took 618.04ms. Allocated memory is still 111.1MB. Free memory was 79.1MB in the beginning and 67.5MB in the end (delta: 11.6MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2021-12-15 11:11:46,151 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 75.5MB. Free memory was 35.2MB in the beginning and 35.2MB in the end (delta: 36.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:46,152 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.78ms. Allocated memory is still 111.1MB. Free memory was 79.1MB in the beginning and 88.5MB in the end (delta: -9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 11:11:46,153 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.96ms. Allocated memory is still 111.1MB. Free memory was 88.5MB in the beginning and 87.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 11:11:46,153 INFO L158 Benchmark]: Boogie Preprocessor took 19.10ms. Allocated memory is still 111.1MB. Free memory was 87.1MB in the beginning and 86.3MB in the end (delta: 831.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:46,154 INFO L158 Benchmark]: RCFGBuilder took 264.45ms. Allocated memory is still 111.1MB. Free memory was 85.9MB in the beginning and 76.8MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 11:11:46,154 INFO L158 Benchmark]: TraceAbstraction took 103.74ms. Allocated memory is still 111.1MB. Free memory was 76.4MB in the beginning and 67.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 11:11:46,157 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 75.5MB. Free memory was 35.2MB in the beginning and 35.2MB in the end (delta: 36.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 195.78ms. Allocated memory is still 111.1MB. Free memory was 79.1MB in the beginning and 88.5MB in the end (delta: -9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.96ms. Allocated memory is still 111.1MB. Free memory was 88.5MB in the beginning and 87.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.10ms. Allocated memory is still 111.1MB. Free memory was 87.1MB in the beginning and 86.3MB in the end (delta: 831.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 264.45ms. Allocated memory is still 111.1MB. Free memory was 85.9MB in the beginning and 76.8MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 103.74ms. Allocated memory is still 111.1MB. Free memory was 76.4MB in the beginning and 67.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 11:11:46,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.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 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:11:47,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:11:47,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:11:47,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:11:47,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:11:47,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:11:47,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:11:47,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:11:47,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:11:47,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:11:48,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:11:48,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:11:48,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:11:48,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:11:48,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:11:48,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:11:48,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:11:48,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:11:48,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:11:48,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:11:48,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:11:48,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:11:48,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:11:48,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:11:48,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:11:48,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:11:48,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:11:48,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:11:48,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:11:48,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:11:48,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:11:48,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:11:48,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:11:48,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:11:48,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:11:48,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:11:48,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:11:48,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:11:48,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:11:48,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:11:48,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:11:48,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 11:11:48,067 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:11:48,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:11:48,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:11:48,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:11:48,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:11:48,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:11:48,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:11:48,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:11:48,071 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:11:48,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:11:48,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:11:48,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:11:48,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:11:48,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:11:48,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:11:48,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:11:48,073 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 11:11:48,073 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 11:11:48,073 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 11:11:48,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:11:48,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:11:48,073 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:11:48,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:11:48,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:11:48,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:11:48,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:11:48,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:48,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:11:48,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:11:48,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:11:48,075 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 11:11:48,075 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 11:11:48,075 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:11:48,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:11:48,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:11:48,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:11:48,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 11:11:48,076 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 [2021-12-15 11:11:48,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:11:48,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:11:48,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:11:48,394 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:11:48,394 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:11:48,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2021-12-15 11:11:48,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b09d2e8/e4a16f7139ba4a76822acc7bc24ee496/FLAG47f84531c [2021-12-15 11:11:48,742 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:11:48,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2021-12-15 11:11:48,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b09d2e8/e4a16f7139ba4a76822acc7bc24ee496/FLAG47f84531c [2021-12-15 11:11:49,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b09d2e8/e4a16f7139ba4a76822acc7bc24ee496 [2021-12-15 11:11:49,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:11:49,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:11:49,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:49,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:11:49,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:11:49,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@740b9b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49, skipping insertion in model container [2021-12-15 11:11:49,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:11:49,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:11:49,309 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/recursive-simple/fibo_2calls_8-1.c[947,960] [2021-12-15 11:11:49,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:49,318 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:11:49,327 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/recursive-simple/fibo_2calls_8-1.c[947,960] [2021-12-15 11:11:49,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:49,339 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:11:49,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49 WrapperNode [2021-12-15 11:11:49,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:49,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:49,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:11:49,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:11:49,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,366 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-12-15 11:11:49,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:49,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:11:49,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:11:49,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:11:49,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:11:49,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:11:49,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:11:49,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:11:49,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (1/1) ... [2021-12-15 11:11:49,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:49,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:11:49,471 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 11:11:49,474 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 11:11:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:11:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 11:11:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-15 11:11:49,521 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-15 11:11:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-15 11:11:49,521 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-15 11:11:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:11:49,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:11:49,600 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:11:49,601 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:11:49,732 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:11:49,736 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:11:49,737 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:11:49,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:49 BoogieIcfgContainer [2021-12-15 11:11:49,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:11:49,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:11:49,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:11:49,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:11:49,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:11:49" (1/3) ... [2021-12-15 11:11:49,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8ffb78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:49, skipping insertion in model container [2021-12-15 11:11:49,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:49" (2/3) ... [2021-12-15 11:11:49,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8ffb78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:49, skipping insertion in model container [2021-12-15 11:11:49,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:49" (3/3) ... [2021-12-15 11:11:49,743 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2021-12-15 11:11:49,746 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:11:49,746 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:11:49,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:11:49,811 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 11:11:49,811 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:11:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-15 11:11:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 11:11:49,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:11:49,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:11:49,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:11:49,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:11:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1014607960, now seen corresponding path program 1 times [2021-12-15 11:11:49,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:11:49,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100820014] [2021-12-15 11:11:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:11:49,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:11:49,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:11:49,867 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 11:11:49,906 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 11:11:49,918 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 11:11:50,107 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 11:11:50,107 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 11:11:50,113 INFO L158 Benchmark]: Toolchain (without parser) took 926.48ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 32.0MB in the beginning and 47.3MB in the end (delta: -15.3MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. [2021-12-15 11:11:50,114 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 54.5MB. Free memory is still 36.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:50,115 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.91ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.8MB in the beginning and 51.6MB in the end (delta: -19.9MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2021-12-15 11:11:50,115 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.63ms. Allocated memory is still 67.1MB. Free memory was 51.6MB in the beginning and 50.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 11:11:50,116 INFO L158 Benchmark]: Boogie Preprocessor took 29.48ms. Allocated memory is still 67.1MB. Free memory was 50.2MB in the beginning and 49.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:50,117 INFO L158 Benchmark]: RCFGBuilder took 340.95ms. Allocated memory is still 67.1MB. Free memory was 49.1MB in the beginning and 40.3MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 11:11:50,121 INFO L158 Benchmark]: TraceAbstraction took 371.91ms. Allocated memory is still 67.1MB. Free memory was 39.9MB in the beginning and 47.3MB in the end (delta: -7.4MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2021-12-15 11:11:50,125 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 54.5MB. Free memory is still 36.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 152.91ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.8MB in the beginning and 51.6MB in the end (delta: -19.9MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.63ms. Allocated memory is still 67.1MB. Free memory was 51.6MB in the beginning and 50.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.48ms. Allocated memory is still 67.1MB. Free memory was 50.2MB in the beginning and 49.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 340.95ms. Allocated memory is still 67.1MB. Free memory was 49.1MB in the beginning and 40.3MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 371.91ms. Allocated memory is still 67.1MB. Free memory was 39.9MB in the beginning and 47.3MB in the end (delta: -7.4MB). Peak memory consumption was 9.8MB. 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 11:11:50,155 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