./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX --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 32c4229282aa8583dd78af7db3951b4b02cf6352dc78922adb29bd4d79cf61bb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:02:11,737 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:02:11,835 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:02:11,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:02:11,841 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:02:11,880 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:02:11,880 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:02:11,881 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:02:11,882 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:02:11,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:02:11,883 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:02:11,884 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:02:11,885 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:02:11,885 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:02:11,886 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:02:11,886 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:02:11,887 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:02:11,887 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:02:11,888 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:02:11,889 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:02:11,889 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:02:11,890 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:02:11,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:02:11,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:02:11,891 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:02:11,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:02:11,892 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:02:11,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:02:11,893 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:02:11,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:02:11,894 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:02:11,895 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:02:11,895 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:02:11,895 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:02:11,896 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:02:11,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:02:11,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:11,897 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:02:11,898 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:02:11,898 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:02:11,899 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:02:11,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:02:11,900 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:02:11,900 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:02:11,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:02:11,901 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_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32c4229282aa8583dd78af7db3951b4b02cf6352dc78922adb29bd4d79cf61bb [2023-11-12 01:02:12,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:02:12,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:02:12,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:02:12,202 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:02:12,203 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:02:12,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i [2023-11-12 01:02:15,409 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:02:15,627 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:02:15,627 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i [2023-11-12 01:02:15,633 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/data/2db7b22ee/7b31bd9bab8a476fad5cfd4ea590c8eb/FLAG027972f9a [2023-11-12 01:02:15,649 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/data/2db7b22ee/7b31bd9bab8a476fad5cfd4ea590c8eb [2023-11-12 01:02:15,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:02:15,654 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:02:15,655 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:15,655 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:02:15,661 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:02:15,662 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,663 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab99d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15, skipping insertion in model container [2023-11-12 01:02:15,664 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,690 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:02:15,855 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_8b59fe54-efa9-48e3-aac1-185c4bf2c458/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2023-11-12 01:02:15,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:15,881 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:02:15,893 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_8b59fe54-efa9-48e3-aac1-185c4bf2c458/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2023-11-12 01:02:15,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:15,917 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:02:15,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15 WrapperNode [2023-11-12 01:02:15,918 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:15,919 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:15,919 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:02:15,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:02:15,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,955 INFO L138 Inliner]: procedures = 19, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2023-11-12 01:02:15,955 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:15,956 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:02:15,956 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:02:15,956 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:02:15,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,970 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,979 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,981 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,982 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:02:15,985 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:02:15,985 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:02:15,986 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:02:15,987 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (1/1) ... [2023-11-12 01:02:15,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:16,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:16,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:02:16,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:02:16,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:02:16,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:02:16,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:02:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:02:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:02:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:02:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:02:16,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:02:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:02:16,149 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:02:16,151 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:02:16,376 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:02:16,491 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:02:16,491 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 01:02:16,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:16 BoogieIcfgContainer [2023-11-12 01:02:16,494 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:02:16,502 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:02:16,502 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:02:16,505 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:02:16,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:02:15" (1/3) ... [2023-11-12 01:02:16,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412658d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:16, skipping insertion in model container [2023-11-12 01:02:16,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:15" (2/3) ... [2023-11-12 01:02:16,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412658d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:16, skipping insertion in model container [2023-11-12 01:02:16,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:16" (3/3) ... [2023-11-12 01:02:16,508 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2023-11-12 01:02:16,524 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:02:16,524 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:02:16,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:02:16,586 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;@6787016c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:02:16,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:02:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 01:02:16,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:16,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 01:02:16,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:16,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:16,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1686910132, now seen corresponding path program 1 times [2023-11-12 01:02:16,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:16,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117496996] [2023-11-12 01:02:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:16,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:16,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:16,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117496996] [2023-11-12 01:02:16,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117496996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:16,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:16,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960180652] [2023-11-12 01:02:16,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:16,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:02:16,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:16,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:02:16,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:16,980 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:17,073 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2023-11-12 01:02:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 01:02:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:17,083 INFO L225 Difference]: With dead ends: 26 [2023-11-12 01:02:17,083 INFO L226 Difference]: Without dead ends: 17 [2023-11-12 01:02:17,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:17,089 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:17,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-12 01:02:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2023-11-12 01:02:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-11-12 01:02:17,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2023-11-12 01:02:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:17,118 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-11-12 01:02:17,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-11-12 01:02:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:02:17,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:17,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:17,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:02:17,120 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:17,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash -781480928, now seen corresponding path program 1 times [2023-11-12 01:02:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:17,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718803253] [2023-11-12 01:02:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:17,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:17,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:17,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718803253] [2023-11-12 01:02:17,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718803253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:17,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312238516] [2023-11-12 01:02:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:17,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:17,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:17,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:17,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:02:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:17,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:02:17,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:17,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:17,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312238516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:17,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30900170] [2023-11-12 01:02:17,539 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 01:02:17,539 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:17,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:17,548 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:17,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:18,963 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:19,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '103#(and (= 10 (select (select |#memory_int| |ULTIMATE.start_main_~u~0#1.base|) |ULTIMATE.start_main_~u~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.base| 0) (= |ULTIMATE.start_main_~u~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~u~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)))' at error location [2023-11-12 01:02:19,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:19,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:19,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 01:02:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136684266] [2023-11-12 01:02:19,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:19,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:02:19,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:19,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:02:19,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:02:19,089 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:19,179 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-11-12 01:02:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:02:19,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 01:02:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:19,182 INFO L225 Difference]: With dead ends: 42 [2023-11-12 01:02:19,183 INFO L226 Difference]: Without dead ends: 35 [2023-11-12 01:02:19,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:02:19,188 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:19,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-12 01:02:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 13. [2023-11-12 01:02:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-12 01:02:19,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-11-12 01:02:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:19,204 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-12 01:02:19,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:19,206 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-12 01:02:19,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 01:02:19,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:19,207 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:19,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:19,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:19,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:19,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:19,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1002922060, now seen corresponding path program 2 times [2023-11-12 01:02:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:19,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390368248] [2023-11-12 01:02:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:19,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:19,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390368248] [2023-11-12 01:02:19,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390368248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:19,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130824091] [2023-11-12 01:02:19,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:19,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:19,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:19,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:19,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:02:20,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 01:02:20,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:20,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:02:20,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:20,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:20,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130824091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:20,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1913450765] [2023-11-12 01:02:20,251 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 01:02:20,251 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:20,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:20,252 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:20,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:22,240 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:22,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '245#(and (= 10 (select (select |#memory_int| |ULTIMATE.start_main_~u~0#1.base|) |ULTIMATE.start_main_~u~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.base| 0) (= |ULTIMATE.start_main_~u~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~u~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)))' at error location [2023-11-12 01:02:22,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:22,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:22,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 01:02:22,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219265323] [2023-11-12 01:02:22,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:22,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 01:02:22,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:22,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 01:02:22,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:02:22,341 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:22,521 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2023-11-12 01:02:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 01:02:22,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 01:02:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:22,527 INFO L225 Difference]: With dead ends: 90 [2023-11-12 01:02:22,527 INFO L226 Difference]: Without dead ends: 83 [2023-11-12 01:02:22,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:02:22,533 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 119 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:22,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 66 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:22,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-12 01:02:22,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 19. [2023-11-12 01:02:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-12 01:02:22,549 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2023-11-12 01:02:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:22,549 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-12 01:02:22,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-12 01:02:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 01:02:22,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:22,551 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:22,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:22,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 01:02:22,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:22,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash 180228044, now seen corresponding path program 3 times [2023-11-12 01:02:22,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:22,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138625059] [2023-11-12 01:02:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:22,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:23,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138625059] [2023-11-12 01:02:23,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138625059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546185224] [2023-11-12 01:02:23,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:02:23,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:23,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:23,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:23,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:02:23,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:02:23,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:23,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 01:02:23,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:23,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:24,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546185224] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:24,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [135811751] [2023-11-12 01:02:24,079 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 01:02:24,079 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:24,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:24,079 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:24,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:25,898 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:25,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (= 10 (select (select |#memory_int| |ULTIMATE.start_main_~u~0#1.base|) |ULTIMATE.start_main_~u~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.base| 0) (= |ULTIMATE.start_main_~u~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~u~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)))' at error location [2023-11-12 01:02:25,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:25,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:25,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-12 01:02:25,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388784703] [2023-11-12 01:02:25,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:25,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 01:02:25,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:25,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 01:02:25,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2023-11-12 01:02:25,998 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:26,369 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2023-11-12 01:02:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 01:02:26,369 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 01:02:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:26,376 INFO L225 Difference]: With dead ends: 186 [2023-11-12 01:02:26,376 INFO L226 Difference]: Without dead ends: 179 [2023-11-12 01:02:26,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2023-11-12 01:02:26,380 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 385 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:26,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 132 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:02:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-12 01:02:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 31. [2023-11-12 01:02:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-11-12 01:02:26,417 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2023-11-12 01:02:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:26,418 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-11-12 01:02:26,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-11-12 01:02:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 01:02:26,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:26,420 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:26,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:26,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-12 01:02:26,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:26,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash -4288820, now seen corresponding path program 4 times [2023-11-12 01:02:26,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:26,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166873294] [2023-11-12 01:02:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:26,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:28,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:28,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166873294] [2023-11-12 01:02:28,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166873294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:28,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060394225] [2023-11-12 01:02:28,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:02:28,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:28,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:28,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:28,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:02:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:29,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 01:02:29,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:29,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:30,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060394225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:30,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659685328] [2023-11-12 01:02:30,047 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 01:02:30,047 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:30,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:30,047 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:30,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:31,099 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:31,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1009#(and (= 10 (select (select |#memory_int| |ULTIMATE.start_main_~u~0#1.base|) |ULTIMATE.start_main_~u~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.base| 0) (= |ULTIMATE.start_main_~u~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~u~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)))' at error location [2023-11-12 01:02:31,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:31,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:31,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-12 01:02:31,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464659352] [2023-11-12 01:02:31,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:31,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-12 01:02:31,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-12 01:02:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1324, Invalid=1328, Unknown=0, NotChecked=0, Total=2652 [2023-11-12 01:02:31,199 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:32,001 INFO L93 Difference]: Finished difference Result 378 states and 450 transitions. [2023-11-12 01:02:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-12 01:02:32,012 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-12 01:02:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:32,015 INFO L225 Difference]: With dead ends: 378 [2023-11-12 01:02:32,016 INFO L226 Difference]: Without dead ends: 371 [2023-11-12 01:02:32,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1324, Invalid=1328, Unknown=0, NotChecked=0, Total=2652 [2023-11-12 01:02:32,018 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1176 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:32,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1176 Valid, 276 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:02:32,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-12 01:02:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 55. [2023-11-12 01:02:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2023-11-12 01:02:32,045 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 28 [2023-11-12 01:02:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:32,046 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2023-11-12 01:02:32,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2023-11-12 01:02:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 01:02:32,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:32,051 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:32,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:32,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:32,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:32,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:32,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1613499596, now seen corresponding path program 5 times [2023-11-12 01:02:32,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:32,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56301318] [2023-11-12 01:02:32,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:32,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:37,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56301318] [2023-11-12 01:02:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56301318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172387711] [2023-11-12 01:02:37,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:37,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:37,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:37,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b59fe54-efa9-48e3-aac1-185c4bf2c458/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process