./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC --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 1693662d9872ce45cd117d61c82cdfc52e871ea9 ........................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:22:50,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:22:50,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:22:50,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:22:50,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:22:50,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:22:50,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:22:50,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:22:50,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:22:50,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:22:50,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:22:50,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:22:50,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:22:50,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:22:50,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:22:50,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:22:50,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:22:50,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:22:50,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:22:50,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:22:50,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:22:50,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:22:50,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:22:50,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:22:50,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:22:50,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:22:50,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:22:50,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:22:50,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:22:50,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:22:50,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:22:50,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:22:50,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:22:50,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:22:50,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:22:50,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:22:50,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:22:50,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:22:50,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:22:50,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:22:50,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:22:50,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:22:50,348 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:22:50,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:22:50,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:22:50,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:22:50,351 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:22:50,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:22:50,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:22:50,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:22:50,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:22:50,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:22:50,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:22:50,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:22:50,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:22:50,355 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:22:50,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:22:50,356 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:22:50,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:22:50,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:22:50,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:22:50,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:22:50,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:22:50,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:22:50,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:22:50,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:22:50,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:22:50,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:22:50,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:22:50,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:22:50,373 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1693662d9872ce45cd117d61c82cdfc52e871ea9 [2021-10-11 00:22:50,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:22:50,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:22:50,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:22:50,723 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:22:50,723 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:22:50,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c [2021-10-11 00:22:50,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/data/877b39654/478d1706fa29442fa70a7927a8bf8eed/FLAG7c8c93fa9 [2021-10-11 00:22:51,344 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:22:51,344 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c [2021-10-11 00:22:51,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/data/877b39654/478d1706fa29442fa70a7927a8bf8eed/FLAG7c8c93fa9 [2021-10-11 00:22:51,717 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/data/877b39654/478d1706fa29442fa70a7927a8bf8eed [2021-10-11 00:22:51,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:22:51,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:22:51,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:22:51,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:22:51,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:22:51,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:22:51" (1/1) ... [2021-10-11 00:22:51,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e363ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:51, skipping insertion in model container [2021-10-11 00:22:51,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:22:51" (1/1) ... [2021-10-11 00:22:51,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:22:51,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:22:51,968 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[354,367] [2021-10-11 00:22:51,973 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[442,455] [2021-10-11 00:22:51,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:22:51,985 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:22:51,999 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[354,367] [2021-10-11 00:22:52,001 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[442,455] [2021-10-11 00:22:52,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:22:52,017 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:22:52,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52 WrapperNode [2021-10-11 00:22:52,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:22:52,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:22:52,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:22:52,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:22:52,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (1/1) ... [2021-10-11 00:22:52,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (1/1) ... [2021-10-11 00:22:52,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:22:52,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:22:52,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:22:52,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:22:52,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (1/1) ... [2021-10-11 00:22:52,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (1/1) ... [2021-10-11 00:22:52,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (1/1) ... [2021-10-11 00:22:52,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (1/1) ... [2021-10-11 00:22:52,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (1/1) ... [2021-10-11 00:22:52,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (1/1) ... [2021-10-11 00:22:52,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (1/1) ... [2021-10-11 00:22:52,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:22:52,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:22:52,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:22:52,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:22:52,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:22:52,213 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-10-11 00:22:52,214 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-10-11 00:22:52,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:22:52,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:22:52,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:22:52,214 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2021-10-11 00:22:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2021-10-11 00:22:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:22:52,523 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:22:52,523 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-11 00:22:52,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:52 BoogieIcfgContainer [2021-10-11 00:22:52,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:22:52,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:22:52,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:22:52,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:22:52,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:22:51" (1/3) ... [2021-10-11 00:22:52,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565f221c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:22:52, skipping insertion in model container [2021-10-11 00:22:52,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:52" (2/3) ... [2021-10-11 00:22:52,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565f221c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:22:52, skipping insertion in model container [2021-10-11 00:22:52,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:52" (3/3) ... [2021-10-11 00:22:52,535 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-2.c [2021-10-11 00:22:52,550 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:22:52,553 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-10-11 00:22:52,567 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-11 00:22:52,594 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:22:52,594 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:22:52,594 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:22:52,594 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:22:52,595 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:22:52,595 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:22:52,595 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:22:52,595 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:22:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-10-11 00:22:52,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:22:52,623 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:52,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:52,625 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:52,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:52,632 INFO L82 PathProgramCache]: Analyzing trace with hash 444027717, now seen corresponding path program 1 times [2021-10-11 00:22:52,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:52,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719678147] [2021-10-11 00:22:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:52,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-11 00:22:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:52,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719678147] [2021-10-11 00:22:52,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:22:52,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:22:52,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616417757] [2021-10-11 00:22:52,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:22:52,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:22:52,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:22:52,932 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2021-10-11 00:22:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:52,998 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-10-11 00:22:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:22:53,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 00:22:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:53,009 INFO L225 Difference]: With dead ends: 27 [2021-10-11 00:22:53,009 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 00:22:53,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:22:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 00:22:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 00:22:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 00:22:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 00:22:53,046 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-10-11 00:22:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:53,047 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:22:53,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:22:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 00:22:53,048 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 00:22:53,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:22:53,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 00:22:53,075 INFO L262 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-10-11 00:22:53,075 INFO L258 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-10-11 00:22:53,076 INFO L262 CegarLoopResult]: For program point L11-1(lines 8 13) no Hoare annotation was computed. [2021-10-11 00:22:53,076 INFO L262 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2021-10-11 00:22:53,076 INFO L262 CegarLoopResult]: For program point fEXIT(lines 8 13) no Hoare annotation was computed. [2021-10-11 00:22:53,077 INFO L265 CegarLoopResult]: At program point fENTRY(lines 8 13) the Hoare annotation is: true [2021-10-11 00:22:53,077 INFO L262 CegarLoopResult]: For program point fFINAL(lines 8 13) no Hoare annotation was computed. [2021-10-11 00:22:53,077 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 00:22:53,077 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-11 00:22:53,078 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 00:22:53,078 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-11 00:22:53,078 INFO L265 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2021-10-11 00:22:53,078 INFO L262 CegarLoopResult]: For program point L23-1(lines 22 24) no Hoare annotation was computed. [2021-10-11 00:22:53,079 INFO L262 CegarLoopResult]: For program point L18-1(lines 15 20) no Hoare annotation was computed. [2021-10-11 00:22:53,079 INFO L262 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2021-10-11 00:22:53,079 INFO L262 CegarLoopResult]: For program point f2EXIT(lines 15 20) no Hoare annotation was computed. [2021-10-11 00:22:53,079 INFO L265 CegarLoopResult]: At program point f2ENTRY(lines 15 20) the Hoare annotation is: true [2021-10-11 00:22:53,080 INFO L262 CegarLoopResult]: For program point f2FINAL(lines 15 20) no Hoare annotation was computed. [2021-10-11 00:22:53,080 INFO L262 CegarLoopResult]: For program point f2Err0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-11 00:22:53,080 INFO L265 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2021-10-11 00:22:53,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:22:53 BoogieIcfgContainer [2021-10-11 00:22:53,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:22:53,088 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:22:53,088 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:22:53,089 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:22:53,090 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:52" (3/4) ... [2021-10-11 00:22:53,094 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 00:22:53,102 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2021-10-11 00:22:53,103 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f2 [2021-10-11 00:22:53,109 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-11 00:22:53,109 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-11 00:22:53,109 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:22:53,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:22:53,152 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c857ba-6778-4f42-9e54-2ace6fd67cac/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:22:53,152 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:22:53,155 INFO L168 Benchmark]: Toolchain (without parser) took 1432.89 ms. Allocated memory is still 136.3 MB. Free memory was 95.5 MB in the beginning and 70.6 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:53,156 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 136.3 MB. Free memory is still 112.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:22:53,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.18 ms. Allocated memory is still 136.3 MB. Free memory was 95.3 MB in the beginning and 110.1 MB in the end (delta: -14.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:53,157 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.93 ms. Allocated memory is still 136.3 MB. Free memory was 110.1 MB in the beginning and 108.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:53,158 INFO L168 Benchmark]: Boogie Preprocessor took 35.69 ms. Allocated memory is still 136.3 MB. Free memory was 108.7 MB in the beginning and 107.9 MB in the end (delta: 864.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:22:53,159 INFO L168 Benchmark]: RCFGBuilder took 419.73 ms. Allocated memory is still 136.3 MB. Free memory was 107.9 MB in the beginning and 96.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:53,160 INFO L168 Benchmark]: TraceAbstraction took 560.52 ms. Allocated memory is still 136.3 MB. Free memory was 96.2 MB in the beginning and 73.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:53,161 INFO L168 Benchmark]: Witness Printer took 64.50 ms. Allocated memory is still 136.3 MB. Free memory was 73.1 MB in the beginning and 70.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:53,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 136.3 MB. Free memory is still 112.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 295.18 ms. Allocated memory is still 136.3 MB. Free memory was 95.3 MB in the beginning and 110.1 MB in the end (delta: -14.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.93 ms. Allocated memory is still 136.3 MB. Free memory was 110.1 MB in the beginning and 108.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.69 ms. Allocated memory is still 136.3 MB. Free memory was 108.7 MB in the beginning and 107.9 MB in the end (delta: 864.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 419.73 ms. Allocated memory is still 136.3 MB. Free memory was 107.9 MB in the beginning and 96.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 560.52 ms. Allocated memory is still 136.3 MB. Free memory was 96.2 MB in the beginning and 73.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 64.50 ms. Allocated memory is still 136.3 MB. Free memory was 73.1 MB in the beginning and 70.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 SDtfs, 5 SDslu, 9 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 8 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 140 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...