./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 bd3dbeb1201d252c8f1e3c61a135802ff8f8ccfcc09353f09b9750e3ee951591 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:54:16,371 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:54:16,448 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:54:16,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:54:16,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:54:16,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:54:16,483 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:54:16,484 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:54:16,484 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:54:16,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:54:16,486 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:54:16,486 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:54:16,486 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:54:16,487 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:54:16,487 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:54:16,488 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:54:16,488 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:54:16,489 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:54:16,489 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:54:16,490 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:54:16,490 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:54:16,495 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:54:16,496 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:54:16,496 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:54:16,497 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:54:16,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:54:16,497 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:54:16,498 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:54:16,498 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:54:16,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:54:16,499 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:54:16,499 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:54:16,499 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:54:16,499 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:54:16,500 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:54:16,500 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:54:16,500 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:54:16,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:54:16,501 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:54:16,501 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:54:16,501 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:54:16,501 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:54:16,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:54:16,502 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:54:16,502 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:54:16,502 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:54:16,502 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:54:16,502 INFO L153 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_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd3dbeb1201d252c8f1e3c61a135802ff8f8ccfcc09353f09b9750e3ee951591 [2023-12-02 16:54:16,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:54:16,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:54:16,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:54:16,751 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:54:16,752 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:54:16,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursive-simple/afterrec-1.c [2023-12-02 16:54:19,490 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:54:19,647 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:54:19,647 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/sv-benchmarks/c/recursive-simple/afterrec-1.c [2023-12-02 16:54:19,654 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/data/af58005d2/3c9cb9811f8e4dbea7ca2baea84a8895/FLAG5ae463889 [2023-12-02 16:54:19,669 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/data/af58005d2/3c9cb9811f8e4dbea7ca2baea84a8895 [2023-12-02 16:54:19,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:54:19,673 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:54:19,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:54:19,675 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:54:19,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:54:19,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,682 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388d1346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19, skipping insertion in model container [2023-12-02 16:54:19,682 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,702 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:54:19,854 WARN L240 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_a8e409fe-f318-4d22-91ae-65dc28685893/sv-benchmarks/c/recursive-simple/afterrec-1.c[318,331] [2023-12-02 16:54:19,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:54:19,868 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:54:19,878 WARN L240 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_a8e409fe-f318-4d22-91ae-65dc28685893/sv-benchmarks/c/recursive-simple/afterrec-1.c[318,331] [2023-12-02 16:54:19,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:54:19,890 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:54:19,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19 WrapperNode [2023-12-02 16:54:19,891 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:54:19,892 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:54:19,892 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:54:19,892 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:54:19,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,903 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,914 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 10 [2023-12-02 16:54:19,914 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:54:19,915 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:54:19,915 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:54:19,915 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:54:19,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,923 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,926 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,927 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,928 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:54:19,929 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:54:19,929 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:54:19,929 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:54:19,930 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (1/1) ... [2023-12-02 16:54:19,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:54:19,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:54:19,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:54:19,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:54:19,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:54:19,990 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-12-02 16:54:19,990 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-12-02 16:54:19,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:54:19,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:54:19,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:54:20,058 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:54:20,060 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:54:20,138 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:54:20,156 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:54:20,156 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 16:54:20,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:54:20 BoogieIcfgContainer [2023-12-02 16:54:20,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:54:20,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:54:20,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:54:20,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:54:20,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:54:19" (1/3) ... [2023-12-02 16:54:20,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc87076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:54:20, skipping insertion in model container [2023-12-02 16:54:20,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:54:19" (2/3) ... [2023-12-02 16:54:20,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc87076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:54:20, skipping insertion in model container [2023-12-02 16:54:20,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:54:20" (3/3) ... [2023-12-02 16:54:20,168 INFO L112 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2023-12-02 16:54:20,188 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:54:20,188 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:54:20,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:54:20,245 INFO L357 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26bdb7f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:54:20,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:54:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:54:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 16:54:20,257 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:54:20,257 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 16:54:20,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:54:20,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:54:20,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1625650052, now seen corresponding path program 1 times [2023-12-02 16:54:20,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:54:20,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030601744] [2023-12-02 16:54:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:54:20,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:54:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:54:20,373 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:54:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:54:20,404 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 16:54:20,405 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:54:20,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location fErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 16:54:20,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:54:20,411 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-12-02 16:54:20,416 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 16:54:20,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:54:20 BoogieIcfgContainer [2023-12-02 16:54:20,430 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 16:54:20,431 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 16:54:20,431 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 16:54:20,432 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 16:54:20,432 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:54:20" (3/4) ... [2023-12-02 16:54:20,433 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 16:54:20,463 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 16:54:20,464 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 16:54:20,465 INFO L158 Benchmark]: Toolchain (without parser) took 791.26ms. Allocated memory is still 161.5MB. Free memory was 126.7MB in the beginning and 98.8MB in the end (delta: 27.9MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. [2023-12-02 16:54:20,465 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 123.7MB. Free memory is still 90.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:54:20,466 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.37ms. Allocated memory is still 161.5MB. Free memory was 126.7MB in the beginning and 126.1MB in the end (delta: 642.7kB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 16:54:20,466 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.88ms. Allocated memory is still 161.5MB. Free memory was 126.1MB in the beginning and 124.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:54:20,467 INFO L158 Benchmark]: Boogie Preprocessor took 12.84ms. Allocated memory is still 161.5MB. Free memory was 124.9MB in the beginning and 124.0MB in the end (delta: 897.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:54:20,467 INFO L158 Benchmark]: RCFGBuilder took 229.28ms. Allocated memory is still 161.5MB. Free memory was 124.0MB in the beginning and 114.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 16:54:20,468 INFO L158 Benchmark]: TraceAbstraction took 269.66ms. Allocated memory is still 161.5MB. Free memory was 113.5MB in the beginning and 100.6MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 16:54:20,468 INFO L158 Benchmark]: Witness Printer took 32.44ms. Allocated memory is still 161.5MB. Free memory was 100.6MB in the beginning and 98.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:54:20,471 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 123.7MB. Free memory is still 90.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 216.37ms. Allocated memory is still 161.5MB. Free memory was 126.7MB in the beginning and 126.1MB in the end (delta: 642.7kB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.88ms. Allocated memory is still 161.5MB. Free memory was 126.1MB in the beginning and 124.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.84ms. Allocated memory is still 161.5MB. Free memory was 124.9MB in the beginning and 124.0MB in the end (delta: 897.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 229.28ms. Allocated memory is still 161.5MB. Free memory was 124.0MB in the beginning and 114.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 269.66ms. Allocated memory is still 161.5MB. Free memory was 113.5MB in the beginning and 100.6MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 32.44ms. Allocated memory is still 161.5MB. Free memory was 100.6MB in the beginning and 98.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 9]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] CALL f(4) VAL [\old(n)=4] [L6] COND FALSE !(n<3) [L7] n-- VAL [\old(n)=4, n=3] [L8] CALL f(n) VAL [\old(n)=3] [L6] COND FALSE !(n<3) [L7] n-- VAL [\old(n)=3, n=2] [L8] CALL f(n) VAL [\old(n)=2] [L6] COND TRUE n<3 VAL [\old(n)=2, n=2] [L8] RET f(n) VAL [\old(n)=3, n=2] [L9] reach_error() VAL [\old(n)=3, n=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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! [2023-12-02 16:54:20,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8e409fe-f318-4d22-91ae-65dc28685893/bin/utaipan-verify-nQ1chXbOIh/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE