./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Addition02.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_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Addition02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9c0bb97f0ddc8ff8c6b996d7f7598b56ed37dc2a .............................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:22:12,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:22:12,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:22:12,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:22:12,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:22:12,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:22:12,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:22:12,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:22:12,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:22:12,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:22:12,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:22:12,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:22:12,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:22:12,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:22:12,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:22:12,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:22:12,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:22:12,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:22:12,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:22:12,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:22:12,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:22:12,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:22:12,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:22:12,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:22:12,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:22:12,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:22:12,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:22:12,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:22:12,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:22:12,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:22:12,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:22:12,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:22:12,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:22:12,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:22:12,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:22:12,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:22:12,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:22:12,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:22:12,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:22:12,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:22:12,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:22:12,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:22:12,432 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:22:12,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:22:12,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:22:12,433 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:22:12,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:22:12,434 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:22:12,434 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:22:12,434 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:22:12,434 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:22:12,435 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:22:12,435 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:22:12,435 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:22:12,435 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:22:12,435 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:22:12,436 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:22:12,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:22:12,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:22:12,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:22:12,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:22:12,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:22:12,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:22:12,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:22:12,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:22:12,438 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:22:12,438 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:22:12,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:22:12,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:22:12,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:22:12,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:22:12,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:22:12,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:22:12,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:22:12,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:22:12,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:22:12,440 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:22:12,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:22:12,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:22:12,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:22:12,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:22:12,441 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c0bb97f0ddc8ff8c6b996d7f7598b56ed37dc2a [2021-10-11 02:22:12,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:22:12,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:22:12,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:22:12,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:22:12,707 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:22:12,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/recursive/Addition02.c [2021-10-11 02:22:12,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/data/31858cd38/74a5a1f5d1ad4ef5ac633f732d7a6b2a/FLAG53b0109c6 [2021-10-11 02:22:13,248 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:22:13,249 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/sv-benchmarks/c/recursive/Addition02.c [2021-10-11 02:22:13,254 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/data/31858cd38/74a5a1f5d1ad4ef5ac633f732d7a6b2a/FLAG53b0109c6 [2021-10-11 02:22:13,661 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/data/31858cd38/74a5a1f5d1ad4ef5ac633f732d7a6b2a [2021-10-11 02:22:13,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:22:13,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:22:13,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:13,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:22:13,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:22:13,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@668e242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13, skipping insertion in model container [2021-10-11 02:22:13,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:22:13,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:22:13,862 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_ef9791c4-359a-4029-b5d2-91cc10f1861d/sv-benchmarks/c/recursive/Addition02.c[1124,1137] [2021-10-11 02:22:13,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:13,874 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:22:13,887 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_ef9791c4-359a-4029-b5d2-91cc10f1861d/sv-benchmarks/c/recursive/Addition02.c[1124,1137] [2021-10-11 02:22:13,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:13,901 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:22:13,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13 WrapperNode [2021-10-11 02:22:13,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:13,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:13,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:22:13,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:22:13,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:13,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:22:13,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:22:13,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:22:13,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (1/1) ... [2021-10-11 02:22:13,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:22:13,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:22:13,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:22:13,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:22:13,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/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 02:22:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:22:14,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:22:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:22:14,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:22:14,025 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2021-10-11 02:22:14,025 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2021-10-11 02:22:14,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:22:14,224 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-11 02:22:14,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:14 BoogieIcfgContainer [2021-10-11 02:22:14,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:22:14,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:22:14,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:22:14,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:22:14,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:22:13" (1/3) ... [2021-10-11 02:22:14,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379c4839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:14, skipping insertion in model container [2021-10-11 02:22:14,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:13" (2/3) ... [2021-10-11 02:22:14,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379c4839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:14, skipping insertion in model container [2021-10-11 02:22:14,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:14" (3/3) ... [2021-10-11 02:22:14,235 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition02.c [2021-10-11 02:22:14,248 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:22:14,251 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:22:14,262 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:22:14,284 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:22:14,284 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:22:14,285 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:22:14,285 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:22:14,285 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:22:14,285 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:22:14,285 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:22:14,285 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:22:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-10-11 02:22:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:22:14,305 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:14,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:14,306 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:14,312 INFO L82 PathProgramCache]: Analyzing trace with hash 731430453, now seen corresponding path program 1 times [2021-10-11 02:22:14,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:14,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230316713] [2021-10-11 02:22:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:14,706 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 02:22:14,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230316713] [2021-10-11 02:22:14,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:14,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:22:14,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698197670] [2021-10-11 02:22:14,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:22:14,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:14,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:22:14,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:22:14,728 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2021-10-11 02:22:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:14,893 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-10-11 02:22:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:22:14,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-10-11 02:22:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:14,903 INFO L225 Difference]: With dead ends: 30 [2021-10-11 02:22:14,903 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:22:14,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:22:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:22:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 02:22:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:22:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-10-11 02:22:14,958 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2021-10-11 02:22:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:14,958 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-10-11 02:22:14,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:22:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-10-11 02:22:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:22:14,961 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:14,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:14,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:22:14,962 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1703056242, now seen corresponding path program 1 times [2021-10-11 02:22:14,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:14,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553455323] [2021-10-11 02:22:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:15,111 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 02:22:15,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553455323] [2021-10-11 02:22:15,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:15,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 02:22:15,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359256417] [2021-10-11 02:22:15,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:22:15,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:22:15,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:22:15,117 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 7 states. [2021-10-11 02:22:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:15,251 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-10-11 02:22:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:22:15,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2021-10-11 02:22:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:15,254 INFO L225 Difference]: With dead ends: 31 [2021-10-11 02:22:15,255 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:22:15,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:22:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:22:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-11 02:22:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:22:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-11 02:22:15,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-10-11 02:22:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:15,265 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-11 02:22:15,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:22:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-11 02:22:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:22:15,267 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:15,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:15,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:22:15,268 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:15,271 INFO L82 PathProgramCache]: Analyzing trace with hash 280210265, now seen corresponding path program 1 times [2021-10-11 02:22:15,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:15,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843999894] [2021-10-11 02:22:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:22:15,324 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:22:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:22:15,370 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:22:15,405 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:22:15,405 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:22:15,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:22:15,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:22:15 BoogieIcfgContainer [2021-10-11 02:22:15,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:22:15,455 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:22:15,455 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:22:15,456 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:22:15,456 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:14" (3/4) ... [2021-10-11 02:22:15,458 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:22:15,501 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9791c4-359a-4029-b5d2-91cc10f1861d/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:22:15,502 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:22:15,503 INFO L168 Benchmark]: Toolchain (without parser) took 1837.92 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 73.4 MB in the beginning and 100.6 MB in the end (delta: -27.2 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:15,504 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory is still 36.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:15,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.72 ms. Allocated memory is still 107.0 MB. Free memory was 73.2 MB in the beginning and 82.8 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:15,505 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.70 ms. Allocated memory is still 107.0 MB. Free memory was 82.8 MB in the beginning and 81.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:15,506 INFO L168 Benchmark]: Boogie Preprocessor took 18.69 ms. Allocated memory is still 107.0 MB. Free memory was 81.4 MB in the beginning and 80.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:15,506 INFO L168 Benchmark]: RCFGBuilder took 273.57 ms. Allocated memory is still 107.0 MB. Free memory was 80.4 MB in the beginning and 66.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:15,509 INFO L168 Benchmark]: TraceAbstraction took 1226.15 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 65.7 MB in the beginning and 102.7 MB in the end (delta: -37.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:15,510 INFO L168 Benchmark]: Witness Printer took 46.40 ms. Allocated memory is still 138.4 MB. Free memory was 102.7 MB in the beginning and 100.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:15,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory is still 36.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 234.72 ms. Allocated memory is still 107.0 MB. Free memory was 73.2 MB in the beginning and 82.8 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.70 ms. Allocated memory is still 107.0 MB. Free memory was 82.8 MB in the beginning and 81.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.69 ms. Allocated memory is still 107.0 MB. Free memory was 81.4 MB in the beginning and 80.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 273.57 ms. Allocated memory is still 107.0 MB. Free memory was 80.4 MB in the beginning and 66.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1226.15 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 65.7 MB in the beginning and 102.7 MB in the end (delta: -37.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 46.40 ms. Allocated memory is still 138.4 MB. Free memory was 102.7 MB in the beginning and 100.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L29] int m = __VERIFIER_nondet_int(); [L30] COND FALSE !(m < 0 || m > 1073741823) [L35] int n = __VERIFIER_nondet_int(); [L36] COND FALSE !(n < 0 || n > 1073741823) [L41] CALL, EXPR addition(m,n) VAL [\old(m)=0, \old(n)=1] [L16] COND FALSE !(n == 0) VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L19] COND TRUE n > 0 VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L20] CALL, EXPR addition(m+1, n-1) VAL [\old(m)=1, \old(n)=0] [L16] COND TRUE n == 0 [L17] return m; VAL [\old(m)=1, \old(n)=0, \result=1, m=1, n=0] [L20] RET, EXPR addition(m+1, n-1) VAL [\old(m)=0, \old(n)=1, addition(m+1, n-1)=1, m=0, n=1] [L20] return addition(m+1, n-1); [L41] RET, EXPR addition(m,n) [L41] int result = addition(m,n); [L42] COND FALSE !(result == m - n) [L45] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 29 SDslu, 62 SDs, 0 SdLazy, 126 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 1202 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 incorrect! Received shutdown request...