./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.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_20-1.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 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:11:39,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:11:39,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:11:39,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:11:39,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:11:39,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:11:39,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:11:39,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:11:39,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:11:39,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:11:39,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:11:39,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:11:39,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:11:39,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:11:39,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:11:39,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:11:39,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:11:39,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:11:39,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:11:39,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:11:39,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:11:39,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:11:39,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:11:39,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:11:39,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:11:39,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:11:39,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:11:39,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:11:39,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:11:39,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:11:39,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:11:39,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:11:39,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:11:39,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:11:39,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:11:39,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:11:39,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:11:39,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:11:39,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:11:39,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:11:39,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:11:39,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:11:39,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:11:39,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:11:39,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:11:39,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:11:39,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:11:39,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:11:39,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:11:39,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:11:39,204 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:11:39,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:11:39,205 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:11:39,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:11:39,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:11:39,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:11:39,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:11:39,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:11:39,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:11:39,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:11:39,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:11:39,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:11:39,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:11:39,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:11:39,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:11:39,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:11:39,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:39,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:11:39,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:11:39,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:11:39,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:11:39,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:11:39,209 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:11:39,210 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:11:39,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:11:39,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:11:39,210 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 [2021-12-15 11:11:39,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:11:39,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:11:39,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:11:39,503 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:11:39,504 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:11:39,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2021-12-15 11:11:39,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52ecb4878/cd2ae0f0855f45128ec412f93f07e730/FLAG0e80bb8c6 [2021-12-15 11:11:40,004 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:11:40,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2021-12-15 11:11:40,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52ecb4878/cd2ae0f0855f45128ec412f93f07e730/FLAG0e80bb8c6 [2021-12-15 11:11:40,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52ecb4878/cd2ae0f0855f45128ec412f93f07e730 [2021-12-15 11:11:40,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:11:40,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:11:40,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:40,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:11:40,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:11:40,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6c7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40, skipping insertion in model container [2021-12-15 11:11:40,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:11:40,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:11:40,224 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_20-1.c[951,964] [2021-12-15 11:11:40,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:40,237 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:11:40,257 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_20-1.c[951,964] [2021-12-15 11:11:40,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:40,272 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:11:40,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40 WrapperNode [2021-12-15 11:11:40,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:40,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:40,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:11:40,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:11:40,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,302 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-12-15 11:11:40,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:40,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:11:40,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:11:40,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:11:40,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:11:40,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:11:40,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:11:40,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:11:40,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (1/1) ... [2021-12-15 11:11:40,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:40,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:11:40,373 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 11:11:40,411 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 11:11:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:11:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:11:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-15 11:11:40,424 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-15 11:11:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-15 11:11:40,425 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-15 11:11:40,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:11:40,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:11:40,483 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:11:40,484 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:11:40,614 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:11:40,619 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:11:40,620 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:11:40,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:40 BoogieIcfgContainer [2021-12-15 11:11:40,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:11:40,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:11:40,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:11:40,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:11:40,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:11:40" (1/3) ... [2021-12-15 11:11:40,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29197096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:40, skipping insertion in model container [2021-12-15 11:11:40,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:40" (2/3) ... [2021-12-15 11:11:40,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29197096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:40, skipping insertion in model container [2021-12-15 11:11:40,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:40" (3/3) ... [2021-12-15 11:11:40,631 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2021-12-15 11:11:40,635 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:11:40,636 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:11:40,688 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:11:40,697 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 11:11:40,698 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:11:40,713 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 11:11:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 11:11:40,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:11:40,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:11:40,721 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:11:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:11:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-12-15 11:11:40,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:11:40,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864888860] [2021-12-15 11:11:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:11:40,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:11:40,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:11:40,790 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 11:11:40,800 INFO L158 Benchmark]: Toolchain (without parser) took 760.95ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 68.7MB in the beginning and 77.8MB in the end (delta: -9.1MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. [2021-12-15 11:11:40,800 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 96.5MB. Free memory is still 55.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:40,801 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.42ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 68.5MB in the beginning and 98.7MB in the end (delta: -30.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 11:11:40,802 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.74ms. Allocated memory is still 121.6MB. Free memory was 98.7MB in the beginning and 97.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 11:11:40,803 INFO L158 Benchmark]: Boogie Preprocessor took 35.57ms. Allocated memory is still 121.6MB. Free memory was 97.2MB in the beginning and 96.3MB in the end (delta: 887.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:40,803 INFO L158 Benchmark]: RCFGBuilder took 281.95ms. Allocated memory is still 121.6MB. Free memory was 96.3MB in the beginning and 87.1MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 11:11:40,808 INFO L158 Benchmark]: TraceAbstraction took 173.39ms. Allocated memory is still 121.6MB. Free memory was 86.7MB in the beginning and 77.8MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 11:11:40,813 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 96.5MB. Free memory is still 55.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.42ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 68.5MB in the beginning and 98.7MB in the end (delta: -30.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.74ms. Allocated memory is still 121.6MB. Free memory was 98.7MB in the beginning and 97.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.57ms. Allocated memory is still 121.6MB. Free memory was 97.2MB in the beginning and 96.3MB in the end (delta: 887.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 281.95ms. Allocated memory is still 121.6MB. Free memory was 96.3MB in the beginning and 87.1MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 173.39ms. Allocated memory is still 121.6MB. Free memory was 86.7MB in the beginning and 77.8MB 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 11:11:40,858 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_20-1.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 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:11:42,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:11:42,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:11:42,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:11:42,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:11:42,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:11:42,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:11:42,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:11:42,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:11:42,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:11:42,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:11:42,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:11:42,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:11:42,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:11:42,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:11:42,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:11:42,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:11:42,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:11:42,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:11:42,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:11:42,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:11:42,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:11:42,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:11:42,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:11:42,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:11:42,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:11:42,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:11:42,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:11:42,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:11:42,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:11:42,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:11:42,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:11:42,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:11:42,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:11:42,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:11:42,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:11:42,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:11:42,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:11:42,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:11:42,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:11:42,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:11:42,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 11:11:42,984 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:11:42,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:11:42,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:11:42,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:11:42,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:11:42,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:11:42,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:11:42,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:11:42,989 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:11:42,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:11:42,990 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:11:42,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:11:42,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:11:42,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:11:42,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:11:42,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:11:42,991 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 11:11:42,991 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 11:11:42,991 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 11:11:42,991 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:11:42,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:11:42,992 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:11:42,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:11:42,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:11:42,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:11:43,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:11:43,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:43,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:11:43,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:11:43,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:11:43,002 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 11:11:43,002 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 11:11:43,002 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:11:43,003 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:11:43,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:11:43,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:11:43,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 11:11:43,004 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 [2021-12-15 11:11:43,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:11:43,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:11:43,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:11:43,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:11:43,379 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:11:43,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2021-12-15 11:11:43,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6991bc7ba/6d97400ba33b4b3087ce47a8be46a6e2/FLAG154ed99b9 [2021-12-15 11:11:43,841 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:11:43,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2021-12-15 11:11:43,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6991bc7ba/6d97400ba33b4b3087ce47a8be46a6e2/FLAG154ed99b9 [2021-12-15 11:11:44,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6991bc7ba/6d97400ba33b4b3087ce47a8be46a6e2 [2021-12-15 11:11:44,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:11:44,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:11:44,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:44,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:11:44,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:11:44,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@273263fd 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 11:11:44,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:11:44,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:11:44,416 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_20-1.c[951,964] [2021-12-15 11:11:44,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:44,428 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:11:44,448 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_20-1.c[951,964] [2021-12-15 11:11:44,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:11:44,461 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:11:44,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44 WrapperNode [2021-12-15 11:11:44,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:11:44,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:44,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:11:44,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:11:44,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,518 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-12-15 11:11:44,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:11:44,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:11:44,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:11:44,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:11:44,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:11:44,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:11:44,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:11:44,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:11:44,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (1/1) ... [2021-12-15 11:11:44,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:11:44,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:11:44,592 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 11:11:44,622 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 11:11:44,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:11:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 11:11:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-15 11:11:44,639 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-15 11:11:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-15 11:11:44,639 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-15 11:11:44,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:11:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:11:44,691 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:11:44,692 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:11:44,773 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:11:44,779 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:11:44,779 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:11:44,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:44 BoogieIcfgContainer [2021-12-15 11:11:44,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:11:44,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:11:44,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:11:44,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:11:44,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:11:44" (1/3) ... [2021-12-15 11:11:44,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5863fb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:44, skipping insertion in model container [2021-12-15 11:11:44,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:11:44" (2/3) ... [2021-12-15 11:11:44,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5863fb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:11:44, skipping insertion in model container [2021-12-15 11:11:44,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:11:44" (3/3) ... [2021-12-15 11:11:44,789 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2021-12-15 11:11:44,794 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:11:44,794 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:11:44,834 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:11:44,840 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 11:11:44,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:11:44,854 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 11:11:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 11:11:44,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:11:44,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:11:44,860 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:11:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:11:44,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1014607960, now seen corresponding path program 1 times [2021-12-15 11:11:44,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:11:44,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960495743] [2021-12-15 11:11:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:11:44,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:11:44,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:11:44,940 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 11:11:45,016 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 11:11:45,017 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 11:11:45,213 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 11:11:45,214 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 11:11:45,219 INFO L158 Benchmark]: Toolchain (without parser) took 959.50ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.7MB in the beginning and 42.0MB in the end (delta: -14.3MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. [2021-12-15 11:11:45,219 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 50.3MB. Free memory was 32.2MB in the beginning and 32.1MB in the end (delta: 38.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:45,220 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.02ms. Allocated memory is still 50.3MB. Free memory was 27.5MB in the beginning and 29.0MB in the end (delta: -1.5MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-12-15 11:11:45,221 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.30ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 29.0MB in the beginning and 45.0MB in the end (delta: -16.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 11:11:45,221 INFO L158 Benchmark]: Boogie Preprocessor took 44.62ms. Allocated memory is still 60.8MB. Free memory was 45.0MB in the beginning and 44.1MB in the end (delta: 980.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:11:45,222 INFO L158 Benchmark]: RCFGBuilder took 217.61ms. Allocated memory is still 60.8MB. Free memory was 44.1MB in the beginning and 35.4MB in the end (delta: 8.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-15 11:11:45,222 INFO L158 Benchmark]: TraceAbstraction took 433.56ms. Allocated memory is still 60.8MB. Free memory was 34.8MB in the beginning and 42.0MB in the end (delta: -7.2MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2021-12-15 11:11:45,231 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 50.3MB. Free memory was 32.2MB in the beginning and 32.1MB in the end (delta: 38.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 203.02ms. Allocated memory is still 50.3MB. Free memory was 27.5MB in the beginning and 29.0MB in the end (delta: -1.5MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.30ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 29.0MB in the beginning and 45.0MB in the end (delta: -16.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.62ms. Allocated memory is still 60.8MB. Free memory was 45.0MB in the beginning and 44.1MB in the end (delta: 980.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 217.61ms. Allocated memory is still 60.8MB. Free memory was 44.1MB in the beginning and 35.4MB in the end (delta: 8.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 433.56ms. Allocated memory is still 60.8MB. Free memory was 34.8MB in the beginning and 42.0MB in the end (delta: -7.2MB). 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 11:11:45,277 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