./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire --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 7a78b2f82c5c523b03c70ba898547797b8578723f2b367d871b1e6ef867cb4b5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:21:11,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:21:11,821 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:21:11,827 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:21:11,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:21:11,853 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:21:11,853 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:21:11,854 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:21:11,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:21:11,856 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:21:11,856 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:21:11,857 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:21:11,857 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:21:11,858 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:21:11,859 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:21:11,859 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:21:11,860 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:21:11,860 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:21:11,861 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:21:11,862 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:21:11,862 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:21:11,863 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:21:11,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:21:11,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:21:11,865 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:21:11,866 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:21:11,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:21:11,867 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:21:11,867 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:21:11,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:21:11,869 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:21:11,869 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:21:11,869 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:21:11,870 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:21:11,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:21:11,871 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:21:11,871 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:21:11,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:21:11,872 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:21:11,872 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:21:11,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:21:11,873 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:21:11,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:21:11,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:21:11,874 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:21:11,874 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:21:11,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:21:11,875 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_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a78b2f82c5c523b03c70ba898547797b8578723f2b367d871b1e6ef867cb4b5 [2023-11-23 21:21:12,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:21:12,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:21:12,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:21:12,225 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:21:12,226 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:21:12,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i [2023-11-23 21:21:15,470 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:21:15,773 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:21:15,774 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i [2023-11-23 21:21:15,786 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/data/d28877232/537fad4c9cd549419ee77a126afd5c9f/FLAG4564d9aad [2023-11-23 21:21:15,808 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/data/d28877232/537fad4c9cd549419ee77a126afd5c9f [2023-11-23 21:21:15,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:21:15,820 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:21:15,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:21:15,824 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:21:15,831 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:21:15,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:15" (1/1) ... [2023-11-23 21:21:15,836 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d99ede6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:15, skipping insertion in model container [2023-11-23 21:21:15,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:15" (1/1) ... [2023-11-23 21:21:15,870 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:21:16,104 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_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i[1898,1911] [2023-11-23 21:21:16,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:21:16,161 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:21:16,184 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_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i[1898,1911] [2023-11-23 21:21:16,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:21:16,229 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:21:16,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16 WrapperNode [2023-11-23 21:21:16,235 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:21:16,236 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:21:16,237 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:21:16,237 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:21:16,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,271 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,295 INFO L138 Inliner]: procedures = 18, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-11-23 21:21:16,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:21:16,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:21:16,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:21:16,297 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:21:16,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,315 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,315 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,331 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,334 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,335 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,337 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,339 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:21:16,340 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:21:16,340 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:21:16,341 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:21:16,342 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (1/1) ... [2023-11-23 21:21:16,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:21:16,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:21:16,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:21:16,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:21:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:21:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:21:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:21:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:21:16,431 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_41_0 [2023-11-23 21:21:16,431 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_41_0 [2023-11-23 21:21:16,431 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_44_to_45_0 [2023-11-23 21:21:16,431 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_44_to_45_0 [2023-11-23 21:21:16,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:21:16,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:21:16,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:21:16,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:21:16,525 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:21:16,528 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:21:16,835 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:21:16,903 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:21:16,904 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:21:16,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:16 BoogieIcfgContainer [2023-11-23 21:21:16,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:21:16,910 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:21:16,910 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:21:16,914 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:21:16,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:21:15" (1/3) ... [2023-11-23 21:21:16,916 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76968667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:16, skipping insertion in model container [2023-11-23 21:21:16,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:16" (2/3) ... [2023-11-23 21:21:16,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76968667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:16, skipping insertion in model container [2023-11-23 21:21:16,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:16" (3/3) ... [2023-11-23 21:21:16,918 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_3.i [2023-11-23 21:21:16,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:21:16,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:21:16,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:21:17,006 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;@418c6dc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:21:17,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:21:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:21:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:21:17,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:17,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:17,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:17,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:17,034 INFO L85 PathProgramCache]: Analyzing trace with hash 743192526, now seen corresponding path program 1 times [2023-11-23 21:21:17,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:17,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040488832] [2023-11-23 21:21:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:17,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:18,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:18,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040488832] [2023-11-23 21:21:18,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040488832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:18,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:18,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:21:18,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424807030] [2023-11-23 21:21:18,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:18,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:21:18,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:21:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:21:18,109 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:21:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:18,285 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-11-23 21:21:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:21:18,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-23 21:21:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:18,299 INFO L225 Difference]: With dead ends: 38 [2023-11-23 21:21:18,300 INFO L226 Difference]: Without dead ends: 18 [2023-11-23 21:21:18,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:21:18,309 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:18,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 36 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:21:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-23 21:21:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-23 21:21:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:21:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-11-23 21:21:18,356 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-11-23 21:21:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:18,358 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-11-23 21:21:18,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:21:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-11-23 21:21:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:21:18,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:18,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:18,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:21:18,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:18,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1068795354, now seen corresponding path program 1 times [2023-11-23 21:21:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:18,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932869759] [2023-11-23 21:21:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:18,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:21:19,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:19,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932869759] [2023-11-23 21:21:19,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932869759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:21:19,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121944369] [2023-11-23 21:21:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:19,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:21:19,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:21:19,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:21:19,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:21:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:19,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-23 21:21:19,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:21:19,853 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:21:19,854 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 44 treesize of output 40 [2023-11-23 21:21:20,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:20,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 58 [2023-11-23 21:21:20,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:20,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:20,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:20,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2023-11-23 21:21:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:21:20,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:21:21,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121944369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:21:21,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200772855] [2023-11-23 21:21:21,662 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-23 21:21:21,663 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:21:21,668 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) [2023-11-23 21:21:21,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:21:21,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-23 21:21:21,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804399170] [2023-11-23 21:21:21,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:21:21,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 21:21:21,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:21,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 21:21:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:21:21,678 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 15 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:21:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:23,167 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-11-23 21:21:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:21:23,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2023-11-23 21:21:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:23,171 INFO L225 Difference]: With dead ends: 31 [2023-11-23 21:21:23,171 INFO L226 Difference]: Without dead ends: 22 [2023-11-23 21:21:23,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:21:23,173 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:23,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 63 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:21:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-23 21:21:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-23 21:21:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:21:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-11-23 21:21:23,190 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2023-11-23 21:21:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:23,191 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-11-23 21:21:23,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:21:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-11-23 21:21:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 21:21:23,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:23,198 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:23,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:21:23,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:21:23,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:23,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:23,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1325948716, now seen corresponding path program 2 times [2023-11-23 21:21:23,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:23,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464760828] [2023-11-23 21:21:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:23,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:21:26,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:26,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464760828] [2023-11-23 21:21:26,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464760828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:21:26,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744768395] [2023-11-23 21:21:26,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:21:26,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:21:26,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:21:26,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:21:26,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00ff95b0-b043-45d2-9ca5-f5d6a0d41a11/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:21:26,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 21:21:26,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:21:26,586 WARN L260 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 154 conjunts are in the unsatisfiable core [2023-11-23 21:21:26,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:21:26,613 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:21:26,614 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 [2023-11-23 21:21:41,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:41,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 138 [2023-11-23 21:21:41,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2023-11-23 21:21:41,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 67 [2023-11-23 21:21:41,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 93 [2023-11-23 21:21:41,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2023-11-23 21:21:41,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 20 [2023-11-23 21:21:41,835 INFO L349 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-11-23 21:21:41,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 286 [2023-11-23 21:21:41,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 25 [2023-11-23 21:21:41,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:21:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:21:43,535 INFO L327 TraceCheckSpWp]: Computing backward predicates...