./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.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_6-1.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 e0068f83ad7eb3861b59041e8ebf2a38df44c3a60c0fafaf2450f6b793a60fbe --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:11:43,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:11:43,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:11:43,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:11:43,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:11:43,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:11:43,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:11:43,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:11:43,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:11:43,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:11:43,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:11:43,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:11:43,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:11:43,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:11:43,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:11:43,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:11:43,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:11:43,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:11:43,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:11:43,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:11:43,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:11:43,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:11:43,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:11:43,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:11:43,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:11:43,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:11:43,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:11:43,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:11:43,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:11:43,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:11:43,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:11:43,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:11:43,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:11:43,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:11:43,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:11:43,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:11:43,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:11:43,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:11:43,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:11:43,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:11:43,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:11:43,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:11:43,680 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:11:43,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:11:43,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:11:43,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:11:43,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:11:43,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:11:43,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:11:43,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:11:43,683 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:11:43,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:11:43,684 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:11:43,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:11:43,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:11:43,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:11:43,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:11:43,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:11:43,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:11:43,685 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:11:43,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:11:43,686 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:11:43,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:11:43,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:11:43,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:11:43,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:11:43,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:43,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:11:43,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:11:43,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:11:43,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:11:43,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:11:43,689 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:11:43,689 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:11:43,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:11:43,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:11:43,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0068f83ad7eb3861b59041e8ebf2a38df44c3a60c0fafaf2450f6b793a60fbe [2021-12-15 11:11:43,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:11:43,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:11:43,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:11:43,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:11:43,954 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:11:43,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2021-12-15 11:11:44,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b19bdf653/018f70d648244a15b05fb85963165ddc/FLAGcf868b2bf [2021-12-15 11:11:44,379 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:11:44,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2021-12-15 11:11:44,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b19bdf653/018f70d648244a15b05fb85963165ddc/FLAGcf868b2bf [2021-12-15 11:11:44,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b19bdf653/018f70d648244a15b05fb85963165ddc [2021-12-15 11:11:44,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:11:44,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:11:44,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:44,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:11:44,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:11:44,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4439337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44, skipping insertion in model container [2021-12-15 11:11:44,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:11:44,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:11:44,982 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_6-1.c[946,959] [2021-12-15 11:11:44,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:44,989 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:11:45,001 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_6-1.c[946,959] [2021-12-15 11:11:45,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:45,011 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:11:45,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:45 WrapperNode [2021-12-15 11:11:45,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:45,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:45,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:11:45,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:11:45,018 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 11:11:45,023 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 11:11:45,035 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-12-15 11:11:45,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:45,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:11:45,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:11:45,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:11:45,042 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 11:11:45,042 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 11:11:45,043 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 11:11:45,043 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 11:11:45,046 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 11:11:45,047 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 11:11:45,048 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 11:11:45,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:11:45,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:11:45,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:11:45,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:11:45,051 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 11:11:45,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:45,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:11:45,080 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 11:11:45,091 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 11:11:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:11:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:11:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-15 11:11:45,119 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-15 11:11:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-15 11:11:45,119 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-15 11:11:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:11:45,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:11:45,171 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:11:45,172 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:11:45,245 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:11:45,250 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:11:45,250 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:11:45,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:45 BoogieIcfgContainer [2021-12-15 11:11:45,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:11:45,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:11:45,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:11:45,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:11:45,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:11:44" (1/3) ... [2021-12-15 11:11:45,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1ba266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:45, skipping insertion in model container [2021-12-15 11:11:45,257 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 11:11:45,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1ba266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:45, skipping insertion in model container [2021-12-15 11:11:45,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:45" (3/3) ... [2021-12-15 11:11:45,258 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2021-12-15 11:11:45,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:11:45,265 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:11:45,300 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:11:45,308 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 11:11:45,308 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:11:45,322 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 11:11:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 11:11:45,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:11:45,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:11:45,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:11:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:11:45,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-12-15 11:11:45,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:11:45,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392841910] [2021-12-15 11:11:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:11:45,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:11:45,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:11:45,404 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 11:11:45,410 INFO L158 Benchmark]: Toolchain (without parser) took 590.84ms. Allocated memory is still 111.1MB. Free memory was 79.5MB in the beginning and 66.5MB in the end (delta: 13.0MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2021-12-15 11:11:45,411 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 79.7MB. Free memory was 50.4MB in the beginning and 50.3MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:45,412 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.82ms. Allocated memory is still 111.1MB. Free memory was 78.9MB in the beginning and 87.4MB in the end (delta: -8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 11:11:45,413 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.82ms. Allocated memory is still 111.1MB. Free memory was 87.4MB in the beginning and 86.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 11:11:45,414 INFO L158 Benchmark]: Boogie Preprocessor took 13.43ms. Allocated memory is still 111.1MB. Free memory was 86.0MB in the beginning and 85.4MB in the end (delta: 608.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:45,414 INFO L158 Benchmark]: RCFGBuilder took 202.22ms. Allocated memory is still 111.1MB. Free memory was 85.4MB in the beginning and 76.1MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 11:11:45,416 INFO L158 Benchmark]: TraceAbstraction took 154.78ms. Allocated memory is still 111.1MB. Free memory was 75.5MB in the beginning and 66.5MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 11:11:45,424 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 79.7MB. Free memory was 50.4MB in the beginning and 50.3MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.82ms. Allocated memory is still 111.1MB. Free memory was 78.9MB in the beginning and 87.4MB in the end (delta: -8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.82ms. Allocated memory is still 111.1MB. Free memory was 87.4MB in the beginning and 86.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.43ms. Allocated memory is still 111.1MB. Free memory was 86.0MB in the beginning and 85.4MB in the end (delta: 608.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 202.22ms. Allocated memory is still 111.1MB. Free memory was 85.4MB in the beginning and 76.1MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 154.78ms. Allocated memory is still 111.1MB. Free memory was 75.5MB in the beginning and 66.5MB in the end (delta: 9.1MB). 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 11:11:45,465 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_6-1.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 e0068f83ad7eb3861b59041e8ebf2a38df44c3a60c0fafaf2450f6b793a60fbe --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:11:47,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:11:47,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:11:47,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:11:47,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:11:47,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:11:47,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:11:47,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:11:47,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:11:47,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:11:47,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:11:47,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:11:47,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:11:47,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:11:47,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:11:47,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:11:47,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:11:47,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:11:47,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:11:47,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:11:47,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:11:47,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:11:47,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:11:47,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:11:47,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:11:47,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:11:47,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:11:47,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:11:47,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:11:47,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:11:47,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:11:47,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:11:47,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:11:47,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:11:47,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:11:47,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:11:47,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:11:47,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:11:47,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:11:47,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:11:47,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:11:47,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 11:11:47,429 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:11:47,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:11:47,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:11:47,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:11:47,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:11:47,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:11:47,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:11:47,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:11:47,433 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:11:47,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:11:47,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:11:47,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:11:47,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:11:47,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:11:47,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:11:47,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:11:47,435 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 11:11:47,436 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 11:11:47,436 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 11:11:47,436 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:11:47,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:11:47,436 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:11:47,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:11:47,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:11:47,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:11:47,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:11:47,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:47,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:11:47,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:11:47,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:11:47,438 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 11:11:47,438 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 11:11:47,438 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:11:47,439 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:11:47,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:11:47,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:11:47,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 11:11:47,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0068f83ad7eb3861b59041e8ebf2a38df44c3a60c0fafaf2450f6b793a60fbe [2021-12-15 11:11:47,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:11:47,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:11:47,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:11:47,745 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:11:47,746 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:11:47,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2021-12-15 11:11:47,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6be079f/f9a33a2cd2af47ebbf9b570e70284835/FLAG8e5bb6f76 [2021-12-15 11:11:48,225 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:11:48,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2021-12-15 11:11:48,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6be079f/f9a33a2cd2af47ebbf9b570e70284835/FLAG8e5bb6f76 [2021-12-15 11:11:48,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6be079f/f9a33a2cd2af47ebbf9b570e70284835 [2021-12-15 11:11:48,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:11:48,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:11:48,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:48,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:11:48,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:11:48,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@440f73ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48, skipping insertion in model container [2021-12-15 11:11:48,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:11:48,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:11:48,440 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_6-1.c[946,959] [2021-12-15 11:11:48,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:48,451 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:11:48,471 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_6-1.c[946,959] [2021-12-15 11:11:48,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:48,484 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:11:48,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48 WrapperNode [2021-12-15 11:11:48,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:48,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:48,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:11:48,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:11:48,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,545 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-12-15 11:11:48,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:48,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:11:48,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:11:48,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:11:48,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:11:48,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:11:48,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:11:48,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:11:48,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (1/1) ... [2021-12-15 11:11:48,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:48,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:11:48,609 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 11:11:48,632 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 11:11:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:11:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 11:11:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-15 11:11:48,647 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-15 11:11:48,648 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-15 11:11:48,648 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-15 11:11:48,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:11:48,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:11:48,711 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:11:48,712 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:11:48,834 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:11:48,851 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:11:48,852 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:11:48,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:48 BoogieIcfgContainer [2021-12-15 11:11:48,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:11:48,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:11:48,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:11:48,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:11:48,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:11:48" (1/3) ... [2021-12-15 11:11:48,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4479444e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:48, skipping insertion in model container [2021-12-15 11:11:48,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:48" (2/3) ... [2021-12-15 11:11:48,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4479444e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:48, skipping insertion in model container [2021-12-15 11:11:48,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:48" (3/3) ... [2021-12-15 11:11:48,861 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2021-12-15 11:11:48,877 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:11:48,877 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:11:48,911 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:11:48,917 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 11:11:48,917 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:11:48,934 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 11:11:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 11:11:48,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:11:48,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:11:48,940 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:11:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:11:48,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1014607960, now seen corresponding path program 1 times [2021-12-15 11:11:48,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:11:48,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753939732] [2021-12-15 11:11:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:11:48,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:11:48,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:11:48,965 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 11:11:48,968 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 11:11:49,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 11:11:49,200 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 11:11:49,201 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 11:11:49,205 INFO L158 Benchmark]: Toolchain (without parser) took 950.50ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.7MB in the beginning and 47.7MB in the end (delta: -16.1MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2021-12-15 11:11:49,206 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 54.5MB. Free memory was 36.8MB in the beginning and 36.8MB in the end (delta: 36.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:49,207 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.47ms. Allocated memory is still 54.5MB. Free memory was 31.5MB in the beginning and 35.3MB in the end (delta: -3.8MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2021-12-15 11:11:49,208 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.39ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 35.1MB in the beginning and 50.8MB in the end (delta: -15.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 11:11:49,209 INFO L158 Benchmark]: Boogie Preprocessor took 32.02ms. Allocated memory is still 67.1MB. Free memory was 50.8MB in the beginning and 49.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:49,210 INFO L158 Benchmark]: RCFGBuilder took 273.95ms. Allocated memory is still 67.1MB. Free memory was 49.7MB in the beginning and 40.9MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 11:11:49,215 INFO L158 Benchmark]: TraceAbstraction took 347.73ms. Allocated memory is still 67.1MB. Free memory was 40.4MB in the beginning and 48.0MB in the end (delta: -7.6MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2021-12-15 11:11:49,220 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 54.5MB. Free memory was 36.8MB in the beginning and 36.8MB in the end (delta: 36.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 229.47ms. Allocated memory is still 54.5MB. Free memory was 31.5MB in the beginning and 35.3MB in the end (delta: -3.8MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.39ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 35.1MB in the beginning and 50.8MB in the end (delta: -15.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.02ms. Allocated memory is still 67.1MB. Free memory was 50.8MB in the beginning and 49.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 273.95ms. Allocated memory is still 67.1MB. Free memory was 49.7MB in the beginning and 40.9MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 347.73ms. Allocated memory is still 67.1MB. Free memory was 40.4MB in the beginning and 48.0MB in the end (delta: -7.6MB). Peak memory consumption was 9.9MB. 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 11:11:49,247 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