./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c --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_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/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_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/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_16bb5cf7-d8b1-46b0-860a-1039368bab19/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 dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:28:54,913 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:28:54,981 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:28:54,987 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:28:54,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:28:55,014 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:28:55,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:28:55,015 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:28:55,016 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:28:55,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:28:55,017 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:28:55,018 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:28:55,018 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:28:55,019 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:28:55,019 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:28:55,020 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:28:55,020 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:28:55,021 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:28:55,021 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:28:55,022 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:28:55,022 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:28:55,023 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:28:55,023 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:28:55,024 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:28:55,024 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:28:55,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:28:55,025 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:28:55,025 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:28:55,026 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:28:55,026 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:28:55,027 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:28:55,027 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:28:55,027 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:28:55,028 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:28:55,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:28:55,028 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:28:55,028 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:28:55,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:55,029 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:28:55,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:28:55,029 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:28:55,030 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:28:55,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:28:55,030 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:28:55,031 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:28:55,031 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:28:55,031 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:28:55,031 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_16bb5cf7-d8b1-46b0-860a-1039368bab19/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a [2023-11-23 21:28:55,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:28:55,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:28:55,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:28:55,338 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:28:55,338 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:28:55,340 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2023-11-23 21:28:58,412 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:28:58,649 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:28:58,650 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2023-11-23 21:28:58,660 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/data/dff91c6bb/e53b3356049c4adfad42330eb80b6fc8/FLAG992a8ecb7 [2023-11-23 21:28:58,679 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/data/dff91c6bb/e53b3356049c4adfad42330eb80b6fc8 [2023-11-23 21:28:58,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:28:58,688 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:28:58,690 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:58,691 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:28:58,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:28:58,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:58,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a82f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58, skipping insertion in model container [2023-11-23 21:28:58,699 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:58,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:28:58,898 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_16bb5cf7-d8b1-46b0-860a-1039368bab19/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2023-11-23 21:28:58,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:58,934 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:28:58,946 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_16bb5cf7-d8b1-46b0-860a-1039368bab19/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2023-11-23 21:28:58,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:58,977 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:28:58,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58 WrapperNode [2023-11-23 21:28:58,978 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:58,979 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:58,980 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:28:58,980 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:28:58,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:58,998 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:59,016 INFO L138 Inliner]: procedures = 16, calls = 71, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2023-11-23 21:28:59,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:59,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:28:59,018 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:28:59,018 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:28:59,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:59,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:59,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:59,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:59,046 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:59,049 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:59,051 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:59,053 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:59,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:28:59,062 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:28:59,063 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:28:59,064 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:28:59,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (1/1) ... [2023-11-23 21:28:59,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:59,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:59,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:28:59,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:28:59,160 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_13_0 [2023-11-23 21:28:59,160 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_13_0 [2023-11-23 21:28:59,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:28:59,163 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2023-11-23 21:28:59,163 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2023-11-23 21:28:59,164 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_11_to_12_0 [2023-11-23 21:28:59,164 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_11_to_12_0 [2023-11-23 21:28:59,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:28:59,165 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_14_to_16_0 [2023-11-23 21:28:59,165 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_14_to_16_0 [2023-11-23 21:28:59,166 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_10_to_11_0 [2023-11-23 21:28:59,166 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_10_to_11_0 [2023-11-23 21:28:59,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:28:59,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:28:59,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:28:59,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:28:59,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:28:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:28:59,339 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:28:59,343 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:28:59,814 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:28:59,967 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:28:59,967 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:28:59,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:59 BoogieIcfgContainer [2023-11-23 21:28:59,969 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:28:59,971 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:28:59,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:28:59,975 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:28:59,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:28:58" (1/3) ... [2023-11-23 21:28:59,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6494a999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:59, skipping insertion in model container [2023-11-23 21:28:59,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:58" (2/3) ... [2023-11-23 21:28:59,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6494a999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:59, skipping insertion in model container [2023-11-23 21:28:59,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:59" (3/3) ... [2023-11-23 21:28:59,979 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_deep-nested.c [2023-11-23 21:29:00,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:29:00,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:29:00,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:29:00,051 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;@98f161b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:29:00,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:29:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 21:29:00,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:29:00,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:00,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:00,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:00,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2117252113, now seen corresponding path program 1 times [2023-11-23 21:29:00,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:00,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536269687] [2023-11-23 21:29:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:00,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:03,846 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 21:29:03,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:03,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536269687] [2023-11-23 21:29:03,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536269687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:03,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:03,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-23 21:29:03,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401384105] [2023-11-23 21:29:03,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:03,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:29:03,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:29:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:29:03,912 INFO L87 Difference]: Start difference. First operand has 41 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 16 states, 13 states have (on average 1.0) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:04,757 INFO L93 Difference]: Finished difference Result 111 states and 154 transitions. [2023-11-23 21:29:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 21:29:04,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.0) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-23 21:29:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:04,770 INFO L225 Difference]: With dead ends: 111 [2023-11-23 21:29:04,770 INFO L226 Difference]: Without dead ends: 65 [2023-11-23 21:29:04,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:29:04,781 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:04,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 292 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:29:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-23 21:29:04,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2023-11-23 21:29:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 45 states have internal predecessors, (46), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (16), 8 states have call predecessors, (16), 12 states have call successors, (16) [2023-11-23 21:29:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2023-11-23 21:29:04,845 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 18 [2023-11-23 21:29:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:04,845 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2023-11-23 21:29:04,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.0) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2023-11-23 21:29:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:29:04,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:04,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:04,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:29:04,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:04,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash 200392441, now seen corresponding path program 1 times [2023-11-23 21:29:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:04,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351122534] [2023-11-23 21:29:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:04,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:06,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:06,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351122534] [2023-11-23 21:29:06,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351122534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:06,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500667603] [2023-11-23 21:29:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:06,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:06,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:06,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:06,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:29:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:07,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 175 conjunts are in the unsatisfiable core [2023-11-23 21:29:07,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:07,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:29:07,331 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 2945 treesize of output 2887 [2023-11-23 21:29:07,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-23 21:29:07,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:07,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-23 21:29:07,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-23 21:29:07,577 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:29:07,784 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-23 21:29:07,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-23 21:29:08,096 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-23 21:29:08,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2023-11-23 21:29:08,281 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-23 21:29:08,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-23 21:29:08,476 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-23 21:29:08,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-23 21:29:08,753 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-23 21:29:08,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2023-11-23 21:29:09,308 INFO L349 Elim1Store]: treesize reduction 12, result has 87.6 percent of original size [2023-11-23 21:29:09,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 127 treesize of output 187 [2023-11-23 21:29:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:09,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:15,354 WARN L854 $PredicateComparison]: unable to prove that (forall ((func_to_recursive_line_14_to_16_0_~uint32_max.offset Int) (func_to_recursive_line_14_to_16_0_~c.base Int) (v_ArrVal_87 (Array Int Int)) (func_to_recursive_line_14_to_16_0_~c.offset Int) (func_to_recursive_line_14_to_16_0_~uint32_max.base Int) (func_to_recursive_line_13_to_14_0_~e.offset Int) (func_to_recursive_line_12_to_13_0_~d.offset Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_func_to_recursive_line_11_to_12_0_#in~c.base| v_ArrVal_87))) (store .cse2 |c_func_to_recursive_line_11_to_12_0_#in~d.base| (store (select .cse2 |c_func_to_recursive_line_11_to_12_0_#in~d.base|) func_to_recursive_line_12_to_13_0_~d.offset 0))))) (store .cse1 |c_func_to_recursive_line_11_to_12_0_#in~e.base| (store (select .cse1 |c_func_to_recursive_line_11_to_12_0_#in~e.base|) func_to_recursive_line_13_to_14_0_~e.offset 1))))) (or (not (= (mod (select (select .cse0 |c_func_to_recursive_line_11_to_12_0_#in~d.base|) func_to_recursive_line_12_to_13_0_~d.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 func_to_recursive_line_14_to_16_0_~c.base) func_to_recursive_line_14_to_16_0_~c.offset) 4294967296) 1)) (not (= (mod (+ 4294967294 (select (select .cse0 func_to_recursive_line_14_to_16_0_~uint32_max.base) func_to_recursive_line_14_to_16_0_~uint32_max.offset)) 4294967296) 1)) (not (= (mod (select (select .cse0 |c_func_to_recursive_line_11_to_12_0_#in~b.base|) |c_func_to_recursive_line_11_to_12_0_#in~b.offset|) 4294967296) 1))))) is different from false [2023-11-23 21:29:15,421 WARN L854 $PredicateComparison]: unable to prove that (forall ((func_to_recursive_line_14_to_16_0_~uint32_max.offset Int) (func_to_recursive_line_14_to_16_0_~c.base Int) (v_ArrVal_87 (Array Int Int)) (func_to_recursive_line_14_to_16_0_~c.offset Int) (func_to_recursive_line_14_to_16_0_~uint32_max.base Int) (func_to_recursive_line_13_to_14_0_~e.offset Int) (func_to_recursive_line_12_to_13_0_~d.offset Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_func_to_recursive_line_10_to_11_0_~c.base v_ArrVal_87))) (store .cse2 c_func_to_recursive_line_10_to_11_0_~d.base (store (select .cse2 c_func_to_recursive_line_10_to_11_0_~d.base) func_to_recursive_line_12_to_13_0_~d.offset 0))))) (store .cse1 c_func_to_recursive_line_10_to_11_0_~e.base (store (select .cse1 c_func_to_recursive_line_10_to_11_0_~e.base) func_to_recursive_line_13_to_14_0_~e.offset 1))))) (or (not (= (mod (select (select .cse0 c_func_to_recursive_line_10_to_11_0_~d.base) func_to_recursive_line_12_to_13_0_~d.offset) 4294967296) 1)) (not (= (mod (+ (select (select .cse0 func_to_recursive_line_14_to_16_0_~uint32_max.base) func_to_recursive_line_14_to_16_0_~uint32_max.offset) 4294967294) 4294967296) 1)) (not (= (mod (select (select .cse0 c_func_to_recursive_line_10_to_11_0_~b.base) c_func_to_recursive_line_10_to_11_0_~b.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 func_to_recursive_line_14_to_16_0_~c.base) func_to_recursive_line_14_to_16_0_~c.offset) 4294967296) 1))))) is different from false [2023-11-23 21:29:15,486 WARN L854 $PredicateComparison]: unable to prove that (forall ((func_to_recursive_line_14_to_16_0_~uint32_max.offset Int) (func_to_recursive_line_14_to_16_0_~c.base Int) (v_ArrVal_87 (Array Int Int)) (func_to_recursive_line_14_to_16_0_~c.offset Int) (func_to_recursive_line_10_to_11_0_~b.offset Int) (func_to_recursive_line_14_to_16_0_~uint32_max.base Int) (func_to_recursive_line_13_to_14_0_~e.offset Int) (func_to_recursive_line_12_to_13_0_~d.offset Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (store |c_#memory_int| c_func_to_recursive_line_10_to_11_0_~b.base (store (select |c_#memory_int| c_func_to_recursive_line_10_to_11_0_~b.base) func_to_recursive_line_10_to_11_0_~b.offset 0)) c_func_to_recursive_line_10_to_11_0_~c.base v_ArrVal_87))) (store .cse2 c_func_to_recursive_line_10_to_11_0_~d.base (store (select .cse2 c_func_to_recursive_line_10_to_11_0_~d.base) func_to_recursive_line_12_to_13_0_~d.offset 0))))) (store .cse1 c_func_to_recursive_line_10_to_11_0_~e.base (store (select .cse1 c_func_to_recursive_line_10_to_11_0_~e.base) func_to_recursive_line_13_to_14_0_~e.offset 1))))) (or (not (= (mod (+ 4294967294 (select (select .cse0 func_to_recursive_line_14_to_16_0_~uint32_max.base) func_to_recursive_line_14_to_16_0_~uint32_max.offset)) 4294967296) 1)) (not (= (mod (select (select .cse0 c_func_to_recursive_line_10_to_11_0_~d.base) func_to_recursive_line_12_to_13_0_~d.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 c_func_to_recursive_line_10_to_11_0_~b.base) func_to_recursive_line_10_to_11_0_~b.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 func_to_recursive_line_14_to_16_0_~c.base) func_to_recursive_line_14_to_16_0_~c.offset) 4294967296) 1))))) is different from false [2023-11-23 21:29:15,548 WARN L854 $PredicateComparison]: unable to prove that (forall ((func_to_recursive_line_14_to_16_0_~uint32_max.offset Int) (func_to_recursive_line_14_to_16_0_~c.base Int) (v_ArrVal_87 (Array Int Int)) (func_to_recursive_line_14_to_16_0_~c.offset Int) (func_to_recursive_line_10_to_11_0_~b.offset Int) (func_to_recursive_line_14_to_16_0_~uint32_max.base Int) (func_to_recursive_line_13_to_14_0_~e.offset Int) (func_to_recursive_line_12_to_13_0_~d.offset Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (store |c_#memory_int| |c_func_to_recursive_line_10_to_11_0_#in~b.base| (store (select |c_#memory_int| |c_func_to_recursive_line_10_to_11_0_#in~b.base|) func_to_recursive_line_10_to_11_0_~b.offset 0)) |c_func_to_recursive_line_10_to_11_0_#in~c.base| v_ArrVal_87))) (store .cse2 |c_func_to_recursive_line_10_to_11_0_#in~d.base| (store (select .cse2 |c_func_to_recursive_line_10_to_11_0_#in~d.base|) func_to_recursive_line_12_to_13_0_~d.offset 0))))) (store .cse1 |c_func_to_recursive_line_10_to_11_0_#in~e.base| (store (select .cse1 |c_func_to_recursive_line_10_to_11_0_#in~e.base|) func_to_recursive_line_13_to_14_0_~e.offset 1))))) (or (not (= (mod (select (select .cse0 |c_func_to_recursive_line_10_to_11_0_#in~d.base|) func_to_recursive_line_12_to_13_0_~d.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 func_to_recursive_line_14_to_16_0_~c.base) func_to_recursive_line_14_to_16_0_~c.offset) 4294967296) 1)) (not (= (mod (+ 4294967294 (select (select .cse0 func_to_recursive_line_14_to_16_0_~uint32_max.base) func_to_recursive_line_14_to_16_0_~uint32_max.offset)) 4294967296) 1)) (not (= 1 (mod (select (select .cse0 |c_func_to_recursive_line_10_to_11_0_#in~b.base|) func_to_recursive_line_10_to_11_0_~b.offset) 4294967296)))))) is different from false [2023-11-23 21:29:15,616 WARN L854 $PredicateComparison]: unable to prove that (forall ((func_to_recursive_line_14_to_16_0_~uint32_max.offset Int) (func_to_recursive_line_14_to_16_0_~c.base Int) (v_ArrVal_87 (Array Int Int)) (func_to_recursive_line_14_to_16_0_~c.offset Int) (func_to_recursive_line_10_to_11_0_~b.offset Int) (func_to_recursive_line_14_to_16_0_~uint32_max.base Int) (func_to_recursive_line_13_to_14_0_~e.offset Int) (func_to_recursive_line_12_to_13_0_~d.offset Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) func_to_recursive_line_10_to_11_0_~b.offset 0)) |c_ULTIMATE.start_main_~#c~0#1.base| v_ArrVal_87))) (store .cse2 |c_ULTIMATE.start_main_~#d~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~#d~0#1.base|) func_to_recursive_line_12_to_13_0_~d.offset 0))))) (store .cse1 |c_ULTIMATE.start_main_~#e~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~#e~0#1.base|) func_to_recursive_line_13_to_14_0_~e.offset 1))))) (or (not (= (mod (+ 4294967294 (select (select .cse0 func_to_recursive_line_14_to_16_0_~uint32_max.base) func_to_recursive_line_14_to_16_0_~uint32_max.offset)) 4294967296) 1)) (not (= (mod (select (select .cse0 |c_ULTIMATE.start_main_~#b~0#1.base|) func_to_recursive_line_10_to_11_0_~b.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 func_to_recursive_line_14_to_16_0_~c.base) func_to_recursive_line_14_to_16_0_~c.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 |c_ULTIMATE.start_main_~#d~0#1.base|) func_to_recursive_line_12_to_13_0_~d.offset) 4294967296) 1))))) is different from false [2023-11-23 21:29:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:15,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500667603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:15,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1014989753] [2023-11-23 21:29:15,647 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-23 21:29:15,648 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:15,652 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 21:29:15,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:29:15,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2023-11-23 21:29:15,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32204407] [2023-11-23 21:29:15,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:15,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-23 21:29:15,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:15,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-23 21:29:15,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2183, Unknown=18, NotChecked=490, Total=2862 [2023-11-23 21:29:15,670 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 54 states, 40 states have (on average 1.175) internal successors, (47), 35 states have internal predecessors, (47), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:21,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:21,884 INFO L93 Difference]: Finished difference Result 118 states and 149 transitions. [2023-11-23 21:29:21,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-23 21:29:21,885 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 40 states have (on average 1.175) internal successors, (47), 35 states have internal predecessors, (47), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-23 21:29:21,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:21,889 INFO L225 Difference]: With dead ends: 118 [2023-11-23 21:29:21,889 INFO L226 Difference]: Without dead ends: 116 [2023-11-23 21:29:21,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=459, Invalid=5704, Unknown=19, NotChecked=790, Total=6972 [2023-11-23 21:29:21,894 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 155 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 601 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:21,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 576 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1130 Invalid, 0 Unknown, 601 Unchecked, 2.9s Time] [2023-11-23 21:29:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-23 21:29:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2023-11-23 21:29:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 78 states have internal predecessors, (81), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (30), 12 states have call predecessors, (30), 17 states have call successors, (30) [2023-11-23 21:29:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2023-11-23 21:29:21,923 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 23 [2023-11-23 21:29:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:21,923 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2023-11-23 21:29:21,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 40 states have (on average 1.175) internal successors, (47), 35 states have internal predecessors, (47), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2023-11-23 21:29:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 21:29:21,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:21,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:21,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:22,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:22,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:22,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1001565442, now seen corresponding path program 1 times [2023-11-23 21:29:22,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:22,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620644476] [2023-11-23 21:29:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:22,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:25,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:25,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620644476] [2023-11-23 21:29:25,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620644476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:25,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587837709] [2023-11-23 21:29:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:25,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:25,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:25,719 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:25,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:29:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:25,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 176 conjunts are in the unsatisfiable core [2023-11-23 21:29:25,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:25,995 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:29:25,995 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 47 treesize of output 43 [2023-11-23 21:29:26,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-23 21:29:26,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 21:29:26,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 21:29:26,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-23 21:29:26,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-23 21:29:26,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-23 21:29:26,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-23 21:29:27,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-23 21:29:27,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:29:27,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 61 [2023-11-23 21:29:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:27,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:43,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587837709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:43,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [678470126] [2023-11-23 21:29:43,808 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:29:43,808 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:43,809 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 21:29:43,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:29:43,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 39 [2023-11-23 21:29:43,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943688982] [2023-11-23 21:29:43,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:43,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-23 21:29:43,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-23 21:29:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2171, Unknown=20, NotChecked=0, Total=2352 [2023-11-23 21:29:43,817 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand has 40 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 27 states have internal predecessors, (36), 13 states have call successors, (14), 13 states have call predecessors, (14), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:29:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:48,343 INFO L93 Difference]: Finished difference Result 153 states and 199 transitions. [2023-11-23 21:29:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-23 21:29:48,344 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 27 states have internal predecessors, (36), 13 states have call successors, (14), 13 states have call predecessors, (14), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-11-23 21:29:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:48,347 INFO L225 Difference]: With dead ends: 153 [2023-11-23 21:29:48,347 INFO L226 Difference]: Without dead ends: 151 [2023-11-23 21:29:48,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=406, Invalid=4830, Unknown=20, NotChecked=0, Total=5256 [2023-11-23 21:29:48,370 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:48,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 330 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 21:29:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-23 21:29:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2023-11-23 21:29:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 107 states have internal predecessors, (112), 24 states have call successors, (24), 21 states have call predecessors, (24), 29 states have return successors, (54), 16 states have call predecessors, (54), 22 states have call successors, (54) [2023-11-23 21:29:48,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 190 transitions. [2023-11-23 21:29:48,422 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 190 transitions. Word has length 27 [2023-11-23 21:29:48,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:48,422 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 190 transitions. [2023-11-23 21:29:48,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 27 states have internal predecessors, (36), 13 states have call successors, (14), 13 states have call predecessors, (14), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:29:48,423 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 190 transitions. [2023-11-23 21:29:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 21:29:48,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:48,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:48,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:48,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bb5cf7-d8b1-46b0-860a-1039368bab19/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:48,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:48,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash -566109157, now seen corresponding path program 1 times [2023-11-23 21:29:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:48,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513175433] [2023-11-23 21:29:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:48,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat