./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ --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 c117c02695ddb101583ad96117955e242a853299846ac846441a25e3775ce242 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:02:43,728 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:02:43,819 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:02:43,825 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:02:43,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:02:43,861 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:02:43,862 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:02:43,863 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:02:43,864 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:02:43,864 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:02:43,865 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:02:43,866 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:02:43,866 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:02:43,867 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:02:43,868 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:02:43,868 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:02:43,869 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:02:43,870 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:02:43,870 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:02:43,871 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:02:43,872 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:02:43,873 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:02:43,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:02:43,879 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:02:43,880 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:02:43,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:02:43,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:02:43,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:02:43,888 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:02:43,888 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:02:43,889 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:02:43,889 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:02:43,890 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:02:43,890 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:02:43,891 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:02:43,892 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:02:43,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:02:43,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:02:43,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:02:43,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:02:43,895 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:02:43,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:02:43,896 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:02:43,896 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:02:43,897 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:02:43,897 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_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c117c02695ddb101583ad96117955e242a853299846ac846441a25e3775ce242 [2023-11-19 05:02:44,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:02:44,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:02:44,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:02:44,259 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:02:44,263 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:02:44,265 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c [2023-11-19 05:02:47,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:02:48,223 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:02:48,224 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c [2023-11-19 05:02:48,233 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/data/84b295638/3f399a2b311f483bb92b882ec86cae4f/FLAGa771a51fc [2023-11-19 05:02:48,491 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/data/84b295638/3f399a2b311f483bb92b882ec86cae4f [2023-11-19 05:02:48,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:02:48,500 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:02:48,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:02:48,506 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:02:48,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:02:48,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8a513cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48, skipping insertion in model container [2023-11-19 05:02:48,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,545 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:02:48,759 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_e3ecc868-70c1-4348-a04f-e6fd4a66996e/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c[1476,1489] [2023-11-19 05:02:48,765 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_e3ecc868-70c1-4348-a04f-e6fd4a66996e/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c[1549,1562] [2023-11-19 05:02:48,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:02:48,778 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:02:48,800 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_e3ecc868-70c1-4348-a04f-e6fd4a66996e/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c[1476,1489] [2023-11-19 05:02:48,801 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_e3ecc868-70c1-4348-a04f-e6fd4a66996e/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-b.c[1549,1562] [2023-11-19 05:02:48,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:02:48,821 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:02:48,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48 WrapperNode [2023-11-19 05:02:48,822 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:02:48,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:02:48,823 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:02:48,824 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:02:48,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,847 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,871 INFO L138 Inliner]: procedures = 13, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2023-11-19 05:02:48,872 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:02:48,873 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:02:48,873 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:02:48,873 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:02:48,882 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,886 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,893 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,896 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,899 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,902 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:02:48,904 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:02:48,904 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:02:48,904 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:02:48,905 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (1/1) ... [2023-11-19 05:02:48,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:02:48,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:48,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:02:48,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:02:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:02:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:02:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:02:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:02:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:02:48,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:02:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:02:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:02:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_15_0 [2023-11-19 05:02:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_15_0 [2023-11-19 05:02:49,080 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:02:49,083 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:02:49,319 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:02:49,338 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:02:49,338 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:02:49,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:02:49 BoogieIcfgContainer [2023-11-19 05:02:49,344 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:02:49,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:02:49,348 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:02:49,352 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:02:49,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:02:48" (1/3) ... [2023-11-19 05:02:49,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4070d6e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:02:49, skipping insertion in model container [2023-11-19 05:02:49,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:48" (2/3) ... [2023-11-19 05:02:49,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4070d6e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:02:49, skipping insertion in model container [2023-11-19 05:02:49,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:02:49" (3/3) ... [2023-11-19 05:02:49,356 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_linear-inequality-inv-b.c [2023-11-19 05:02:49,378 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:02:49,379 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:02:49,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:02:49,455 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;@4fffdd47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:02:49,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:02:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 14 states have internal predecessors, (17), 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) [2023-11-19 05:02:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:02:49,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:49,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:49,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:49,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash 947785726, now seen corresponding path program 1 times [2023-11-19 05:02:49,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:49,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693443198] [2023-11-19 05:02:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:49,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:02:50,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:50,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693443198] [2023-11-19 05:02:50,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693443198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:50,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:50,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:02:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331225430] [2023-11-19 05:02:50,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:50,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:02:50,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:02:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:02:50,401 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 14 states have internal predecessors, (17), 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) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:02:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:50,583 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-19 05:02:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:02:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-19 05:02:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:50,600 INFO L225 Difference]: With dead ends: 26 [2023-11-19 05:02:50,600 INFO L226 Difference]: Without dead ends: 14 [2023-11-19 05:02:50,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:02:50,609 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:50,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:02:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-19 05:02:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-19 05:02:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:02:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-19 05:02:50,658 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2023-11-19 05:02:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:50,659 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-19 05:02:50,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:02:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-19 05:02:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:02:50,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:50,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:50,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:02:50,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:50,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1341401249, now seen corresponding path program 1 times [2023-11-19 05:02:50,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:50,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376017002] [2023-11-19 05:02:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:50,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:02:52,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:52,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376017002] [2023-11-19 05:02:52,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376017002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:52,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458737766] [2023-11-19 05:02:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:52,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:52,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:52,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:52,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:02:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:52,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-19 05:02:52,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:52,680 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 05:02:52,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-11-19 05:02:52,814 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_z_1 Int) (v_y_1 Int)) (and (<= v_z_1 255) (<= 0 v_z_1) (= (store (let ((.cse0 (store |c_old(#memory_int)| |c_func_to_recursive_line_12_to_15_0_#in~v.base| (store (select |c_old(#memory_int)| |c_func_to_recursive_line_12_to_15_0_#in~v.base|) |c_func_to_recursive_line_12_to_15_0_#in~v.offset| (+ (* 256 v_y_1) v_z_1))))) (store .cse0 |c_func_to_recursive_line_12_to_15_0_#in~s.base| (let ((.cse1 (select .cse0 |c_func_to_recursive_line_12_to_15_0_#in~s.base|))) (store .cse1 |c_func_to_recursive_line_12_to_15_0_#in~s.offset| (+ v_z_1 (mod (select .cse1 |c_func_to_recursive_line_12_to_15_0_#in~s.offset|) 256)))))) |c_func_to_recursive_line_12_to_15_0_#in~i.base| (select |c_#memory_int| |c_func_to_recursive_line_12_to_15_0_#in~i.base|)) |c_#memory_int|))) is different from true [2023-11-19 05:02:52,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:02:52,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 34 [2023-11-19 05:02:52,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2023-11-19 05:02:53,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 40 [2023-11-19 05:02:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-19 05:02:53,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:02:53,417 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_z_2 Int) (v_y_2 Int) (v_ArrVal_46 (Array Int Int)) (|ULTIMATE.start_main_~#v~0#1.offset| Int)) (or (let ((.cse2 (store (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|) |ULTIMATE.start_main_~#v~0#1.offset| (+ v_z_2 (* 256 v_y_2)))))) (store .cse3 |c_ULTIMATE.start_main_~#s~0#1.base| (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|))) (store .cse4 |c_ULTIMATE.start_main_~#s~0#1.offset| (+ (mod (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.offset|) 256) v_z_2))))) |c_ULTIMATE.start_main_~#i~0#1.base| v_ArrVal_46))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~#v~0#1.base|) |ULTIMATE.start_main_~#v~0#1.offset|))) (< (+ (* 256 (div .cse0 256)) .cse1) (+ .cse0 (* 256 (div .cse1 256)) 1)))) (< 255 v_z_2) (< v_z_2 0))) is different from false [2023-11-19 05:02:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458737766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:53,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730629957] [2023-11-19 05:02:53,452 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 05:02:53,452 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:02:53,458 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:02:53,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:02:53,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2023-11-19 05:02:53,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446055546] [2023-11-19 05:02:53,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:02:53,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 05:02:53,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 05:02:53,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=128, Unknown=2, NotChecked=46, Total=210 [2023-11-19 05:02:53,469 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 05:02:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:54,032 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-11-19 05:02:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:02:54,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 15 [2023-11-19 05:02:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:54,037 INFO L225 Difference]: With dead ends: 24 [2023-11-19 05:02:54,037 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 05:02:54,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=249, Unknown=2, NotChecked=66, Total=380 [2023-11-19 05:02:54,041 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:54,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 49 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2023-11-19 05:02:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 05:02:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-19 05:02:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:02:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-19 05:02:54,058 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2023-11-19 05:02:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:54,059 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-19 05:02:54,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 05:02:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-19 05:02:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:02:54,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:54,067 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:54,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:02:54,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:54,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:54,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2114283542, now seen corresponding path program 2 times [2023-11-19 05:02:54,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:54,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119348552] [2023-11-19 05:02:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:54,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 05:02:54,416 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 05:02:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 05:02:54,520 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 05:02:54,521 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 05:02:54,522 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-19 05:02:54,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-19 05:02:54,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:02:54,530 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-19 05:02:54,536 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 05:02:54,587 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem12 could not be translated [2023-11-19 05:02:54,589 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-19 05:02:54,591 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-19 05:02:54,593 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-19 05:02:54,593 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-19 05:02:54,595 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-19 05:02:54,596 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-19 05:02:54,605 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-11-19 05:02:54,607 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-11-19 05:02:54,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 05:02:54 BoogieIcfgContainer [2023-11-19 05:02:54,620 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 05:02:54,620 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 05:02:54,621 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 05:02:54,621 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 05:02:54,621 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:02:49" (3/4) ... [2023-11-19 05:02:54,622 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-19 05:02:54,643 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem12 could not be translated [2023-11-19 05:02:54,644 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-19 05:02:54,645 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-19 05:02:54,647 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-19 05:02:54,648 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-19 05:02:54,649 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated [2023-11-19 05:02:54,649 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-19 05:02:54,651 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-11-19 05:02:54,654 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-11-19 05:02:54,715 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/witness.graphml [2023-11-19 05:02:54,715 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 05:02:54,716 INFO L158 Benchmark]: Toolchain (without parser) took 6216.61ms. Allocated memory was 142.6MB in the beginning and 197.1MB in the end (delta: 54.5MB). Free memory was 110.2MB in the beginning and 144.2MB in the end (delta: -34.0MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. [2023-11-19 05:02:54,717 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 142.6MB. Free memory is still 84.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:02:54,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.27ms. Allocated memory is still 142.6MB. Free memory was 109.8MB in the beginning and 99.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 05:02:54,718 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.09ms. Allocated memory is still 142.6MB. Free memory was 99.2MB in the beginning and 97.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:02:54,718 INFO L158 Benchmark]: Boogie Preprocessor took 29.95ms. Allocated memory is still 142.6MB. Free memory was 97.6MB in the beginning and 96.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 05:02:54,719 INFO L158 Benchmark]: RCFGBuilder took 440.41ms. Allocated memory is still 142.6MB. Free memory was 96.3MB in the beginning and 82.9MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 05:02:54,719 INFO L158 Benchmark]: TraceAbstraction took 5271.94ms. Allocated memory was 142.6MB in the beginning and 197.1MB in the end (delta: 54.5MB). Free memory was 82.5MB in the beginning and 147.4MB in the end (delta: -64.9MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:02:54,720 INFO L158 Benchmark]: Witness Printer took 95.33ms. Allocated memory is still 197.1MB. Free memory was 147.4MB in the beginning and 144.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-19 05:02:54,722 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 142.6MB. Free memory is still 84.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.27ms. Allocated memory is still 142.6MB. Free memory was 109.8MB in the beginning and 99.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.09ms. Allocated memory is still 142.6MB. Free memory was 99.2MB in the beginning and 97.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.95ms. Allocated memory is still 142.6MB. Free memory was 97.6MB in the beginning and 96.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 440.41ms. Allocated memory is still 142.6MB. Free memory was 96.3MB in the beginning and 82.9MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5271.94ms. Allocated memory was 142.6MB in the beginning and 197.1MB in the end (delta: 54.5MB). Free memory was 82.5MB in the beginning and 147.4MB in the end (delta: -64.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 95.33ms. Allocated memory is still 197.1MB. Free memory was 147.4MB in the beginning and 144.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem12 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem12 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 52]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] unsigned char n = __VERIFIER_nondet_uchar(); [L38] unsigned char n = __VERIFIER_nondet_uchar(); [L39] EXPR \read(n) VAL [n={6:0}] [L39] COND FALSE !(n == 0) [L46] unsigned char v = 0; [L47] unsigned char s = 0; [L48] unsigned int i = 0; VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] [L49] CALL func_to_recursive_line_12_to_15_0(&v, &n, &s, &i) VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] [L22] EXPR \read(*i) [L22] EXPR \read(*n) VAL [i={5:0}, i={5:0}, n={6:0}, n={6:0}, s={7:0}, s={7:0}, v={8:0}, v={8:0}] [L22] COND TRUE (*i) < (*n) [L25] *v = __VERIFIER_nondet_uchar() [L26] EXPR \read(*s) [L26] EXPR \read(*v) [L26] *s += *v [L27] EXPR \read(*i) [L27] ++(*i) [L29] CALL func_to_recursive_line_12_to_15_0(v, n, s, i) VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] [L22] EXPR \read(*i) [L22] EXPR \read(*n) VAL [i={5:0}, i={5:0}, n={6:0}, n={6:0}, s={7:0}, s={7:0}, v={8:0}, v={8:0}] [L22] COND TRUE (*i) < (*n) [L25] *v = __VERIFIER_nondet_uchar() [L26] EXPR \read(*s) [L26] EXPR \read(*v) [L26] *s += *v [L27] EXPR \read(*i) [L27] ++(*i) [L29] CALL func_to_recursive_line_12_to_15_0(v, n, s, i) VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] [L22] EXPR \read(*i) [L22] EXPR \read(*n) VAL [i={5:0}, i={5:0}, n={6:0}, n={6:0}, s={7:0}, s={7:0}, v={8:0}, v={8:0}] [L22] COND FALSE !((*i) < (*n)) [L29] RET func_to_recursive_line_12_to_15_0(v, n, s, i) VAL [i={5:0}, i={5:0}, n={6:0}, n={6:0}, s={7:0}, s={7:0}, v={8:0}, v={8:0}] [L29] RET func_to_recursive_line_12_to_15_0(v, n, s, i) VAL [i={5:0}, i={5:0}, n={6:0}, n={6:0}, s={7:0}, s={7:0}, v={8:0}, v={8:0}] [L49] RET func_to_recursive_line_12_to_15_0(&v, &n, &s, &i) VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] [L50] EXPR \read(s) [L50] EXPR \read(v) VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] [L50] COND TRUE s < v [L52] reach_error() VAL [i={5:0}, n={6:0}, s={7:0}, v={8:0}] - UnprovableResult [Line: 60]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 5.1s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 76 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19 IncrementalHoareTripleChecker+Unchecked, 59 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 119 IncrementalHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 17 mSDtfsCounter, 119 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=2, InterpolantAutomatonStates: 15, 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, 0.5s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 37 ConstructedInterpolants, 3 QuantifiedInterpolants, 750 SizeOfPredicates, 11 NumberOfNonLiveVariables, 172 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 2/8 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! [2023-11-19 05:02:54,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ecc868-70c1-4348-a04f-e6fd4a66996e/bin/utaipan-verify-t7M7D8N6sZ/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