./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.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_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/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_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/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_9ed77bee-77d4-4685-b18b-779bb6348ef0/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 34a8492e255374aad098e162859199083b5b90fe0eb733edf5e3563474d7ceaa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:13,533 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:13,616 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:36:13,622 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:13,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:13,649 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:13,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:13,651 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:13,652 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:13,653 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:13,653 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:13,654 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:13,654 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:13,655 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:13,656 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:13,656 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:13,657 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:13,657 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:13,658 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:13,659 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:13,659 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:13,660 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:13,661 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:13,662 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:13,662 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:13,663 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:13,664 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:13,664 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:13,665 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:13,665 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:13,666 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:13,666 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:13,667 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:13,667 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:13,668 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:13,668 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:13,669 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:13,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:13,669 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:13,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:13,670 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:13,671 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:13,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:13,671 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:13,671 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:13,672 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:13,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:13,672 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_9ed77bee-77d4-4685-b18b-779bb6348ef0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34a8492e255374aad098e162859199083b5b90fe0eb733edf5e3563474d7ceaa [2023-11-23 20:36:13,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:13,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:13,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:13,986 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:13,987 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:13,989 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c [2023-11-23 20:36:17,150 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:17,409 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:17,410 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c [2023-11-23 20:36:17,418 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/data/5e049ffc8/1b9734611fc14a2ea64dfa2fc97b5432/FLAGe07efefc5 [2023-11-23 20:36:17,435 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/data/5e049ffc8/1b9734611fc14a2ea64dfa2fc97b5432 [2023-11-23 20:36:17,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:17,439 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:17,441 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:17,441 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:17,448 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:17,449 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d38540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17, skipping insertion in model container [2023-11-23 20:36:17,450 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,474 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:17,640 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_9ed77bee-77d4-4685-b18b-779bb6348ef0/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c[1277,1290] [2023-11-23 20:36:17,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:17,654 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:17,672 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_9ed77bee-77d4-4685-b18b-779bb6348ef0/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c[1277,1290] [2023-11-23 20:36:17,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:17,691 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:17,692 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17 WrapperNode [2023-11-23 20:36:17,692 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:17,693 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:17,694 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:17,694 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:17,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,730 INFO L138 Inliner]: procedures = 12, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2023-11-23 20:36:17,731 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:17,732 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:17,732 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:17,732 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:17,742 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,745 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,745 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,750 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,752 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,753 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,754 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:17,757 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:17,757 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:17,758 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:17,759 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (1/1) ... [2023-11-23 20:36:17,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:17,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:17,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:17,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:17,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:36:17,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:17,855 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_19_to_19_0 [2023-11-23 20:36:17,855 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_19_to_19_0 [2023-11-23 20:36:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:17,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:36:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:17,936 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:17,939 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:18,060 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:18,103 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:18,106 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 20:36:18,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:18 BoogieIcfgContainer [2023-11-23 20:36:18,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:18,112 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:18,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:18,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:18,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:17" (1/3) ... [2023-11-23 20:36:18,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612b7ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:18, skipping insertion in model container [2023-11-23 20:36:18,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:17" (2/3) ... [2023-11-23 20:36:18,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612b7ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:18, skipping insertion in model container [2023-11-23 20:36:18,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:18" (3/3) ... [2023-11-23 20:36:18,120 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_1.c [2023-11-23 20:36:18,142 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:18,142 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:36:18,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:18,199 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;@7ace12c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:18,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:36:18,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:36:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:36:18,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:18,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:18,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:18,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1146450700, now seen corresponding path program 1 times [2023-11-23 20:36:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:18,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968890263] [2023-11-23 20:36:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:18,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:18,986 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 20:36:18,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:18,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968890263] [2023-11-23 20:36:18,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968890263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:18,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:18,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:36:18,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053989516] [2023-11-23 20:36:18,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:18,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:36:18,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:36:19,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:36:19,038 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:19,118 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-11-23 20:36:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:36:19,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-23 20:36:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:19,129 INFO L225 Difference]: With dead ends: 21 [2023-11-23 20:36:19,129 INFO L226 Difference]: Without dead ends: 13 [2023-11-23 20:36:19,132 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 20:36:19,136 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:19,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-23 20:36:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-23 20:36:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:36:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-23 20:36:19,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-11-23 20:36:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:19,175 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-23 20:36:19,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-23 20:36:19,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 20:36:19,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:19,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:19,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:36:19,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:19,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1151650808, now seen corresponding path program 1 times [2023-11-23 20:36:19,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:19,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667447693] [2023-11-23 20:36:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:19,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:19,730 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 20:36:19,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:19,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667447693] [2023-11-23 20:36:19,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667447693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:19,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879594668] [2023-11-23 20:36:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:19,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:19,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:19,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:19,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:36:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:19,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 20:36:19,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:19,887 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 15 treesize of output 1 [2023-11-23 20:36:20,160 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 20:36:20,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:20,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879594668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:20,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901237301] [2023-11-23 20:36:20,721 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:20,721 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:20,725 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 20:36:20,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:20,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 21 [2023-11-23 20:36:20,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880339657] [2023-11-23 20:36:20,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:20,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 20:36:20,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:20,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 20:36:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2023-11-23 20:36:20,734 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 20:36:20,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:20,914 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-11-23 20:36:20,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:36:20,915 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 14 [2023-11-23 20:36:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:20,916 INFO L225 Difference]: With dead ends: 21 [2023-11-23 20:36:20,916 INFO L226 Difference]: Without dead ends: 17 [2023-11-23 20:36:20,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2023-11-23 20:36:20,919 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:20,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 63 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-23 20:36:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-23 20:36:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:36:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-23 20:36:20,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2023-11-23 20:36:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:20,926 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-23 20:36:20,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 20:36:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-23 20:36:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 20:36:20,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:20,928 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:20,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:21,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:21,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:21,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1489619010, now seen corresponding path program 2 times [2023-11-23 20:36:21,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:21,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758249780] [2023-11-23 20:36:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:21,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:36:21,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:21,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758249780] [2023-11-23 20:36:21,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758249780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:21,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871123764] [2023-11-23 20:36:21,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:36:21,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:21,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:21,829 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:21,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:36:21,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 20:36:21,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:36:21,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-23 20:36:21,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:22,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 13 [2023-11-23 20:36:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:36:22,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:23,018 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-23 20:36:23,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 [2023-11-23 20:36:23,223 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-23 20:36:23,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 [2023-11-23 20:36:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:36:29,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871123764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:29,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123346600] [2023-11-23 20:36:29,707 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:29,708 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:29,708 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 20:36:29,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:29,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2023-11-23 20:36:29,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698438971] [2023-11-23 20:36:29,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:29,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 20:36:29,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 20:36:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=605, Unknown=3, NotChecked=0, Total=702 [2023-11-23 20:36:29,713 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-23 20:36:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:30,050 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-11-23 20:36:30,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 20:36:30,050 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 24 [2023-11-23 20:36:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:30,051 INFO L225 Difference]: With dead ends: 21 [2023-11-23 20:36:30,051 INFO L226 Difference]: Without dead ends: 0 [2023-11-23 20:36:30,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=165, Invalid=1022, Unknown=3, NotChecked=0, Total=1190 [2023-11-23 20:36:30,053 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:30,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-23 20:36:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-23 20:36:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-23 20:36:30,055 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2023-11-23 20:36:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:30,056 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 20:36:30,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-23 20:36:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-23 20:36:30,056 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-23 20:36:30,059 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 20:36:30,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:30,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:30,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-23 20:36:30,285 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (select |old(#memory_int)| func_to_recursive_line_19_to_19_0_~a.base)) (.cse1 (select (select |#memory_int| func_to_recursive_line_19_to_19_0_~a.base) func_to_recursive_line_19_to_19_0_~a.offset))) (and (= |func_to_recursive_line_19_to_19_0_#in~a.offset| func_to_recursive_line_19_to_19_0_~a.offset) (= |#memory_int| (store |old(#memory_int)| func_to_recursive_line_19_to_19_0_~a.base (store .cse0 func_to_recursive_line_19_to_19_0_~a.offset .cse1))) (<= .cse1 (+ (select .cse0 func_to_recursive_line_19_to_19_0_~a.offset) 1)) (= |func_to_recursive_line_19_to_19_0_#in~a.base| func_to_recursive_line_19_to_19_0_~a.base) (<= .cse1 6))) [2023-11-23 20:36:30,285 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 23 37) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2023-11-23 20:36:30,286 INFO L899 garLoopResultBuilder]: For program point L25(lines 25 36) no Hoare annotation was computed. [2023-11-23 20:36:30,286 INFO L899 garLoopResultBuilder]: For program point L25-1(lines 23 37) no Hoare annotation was computed. [2023-11-23 20:36:30,286 INFO L899 garLoopResultBuilder]: For program point func_to_recursive_line_19_to_19_0EXIT(lines 23 37) no Hoare annotation was computed. [2023-11-23 20:36:30,286 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-23 20:36:30,286 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2023-11-23 20:36:30,286 INFO L899 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2023-11-23 20:36:30,286 INFO L899 garLoopResultBuilder]: For program point L46(lines 46 52) no Hoare annotation was computed. [2023-11-23 20:36:30,287 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0)) [2023-11-23 20:36:30,287 INFO L899 garLoopResultBuilder]: For program point L46-2(lines 46 52) no Hoare annotation was computed. [2023-11-23 20:36:30,287 INFO L899 garLoopResultBuilder]: For program point L44-1(line 44) no Hoare annotation was computed. [2023-11-23 20:36:30,287 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-23 20:36:30,291 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-23 20:36:30,293 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 20:36:30,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 08:36:30 BoogieIcfgContainer [2023-11-23 20:36:30,298 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 20:36:30,298 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 20:36:30,298 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 20:36:30,299 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 20:36:30,299 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:18" (3/4) ... [2023-11-23 20:36:30,301 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-23 20:36:30,305 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure func_to_recursive_line_19_to_19_0 [2023-11-23 20:36:30,309 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2023-11-23 20:36:30,310 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-23 20:36:30,310 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-23 20:36:30,310 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-23 20:36:30,390 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 20:36:30,391 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/witness.yml [2023-11-23 20:36:30,391 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 20:36:30,391 INFO L158 Benchmark]: Toolchain (without parser) took 12952.17ms. Allocated memory was 153.1MB in the beginning and 184.5MB in the end (delta: 31.5MB). Free memory was 107.4MB in the beginning and 81.3MB in the end (delta: 26.1MB). Peak memory consumption was 59.2MB. Max. memory is 16.1GB. [2023-11-23 20:36:30,392 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 117.4MB. Free memory was 62.4MB in the beginning and 62.2MB in the end (delta: 158.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:36:30,392 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.29ms. Allocated memory is still 153.1MB. Free memory was 107.4MB in the beginning and 96.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 20:36:30,392 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.86ms. Allocated memory is still 153.1MB. Free memory was 96.9MB in the beginning and 95.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:36:30,393 INFO L158 Benchmark]: Boogie Preprocessor took 24.36ms. Allocated memory is still 153.1MB. Free memory was 95.7MB in the beginning and 94.8MB in the end (delta: 882.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 20:36:30,393 INFO L158 Benchmark]: RCFGBuilder took 351.91ms. Allocated memory is still 153.1MB. Free memory was 94.8MB in the beginning and 84.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 20:36:30,394 INFO L158 Benchmark]: TraceAbstraction took 12185.77ms. Allocated memory was 153.1MB in the beginning and 184.5MB in the end (delta: 31.5MB). Free memory was 83.7MB in the beginning and 85.4MB in the end (delta: -1.7MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. [2023-11-23 20:36:30,394 INFO L158 Benchmark]: Witness Printer took 92.46ms. Allocated memory is still 184.5MB. Free memory was 85.4MB in the beginning and 81.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 20:36:30,396 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 117.4MB. Free memory was 62.4MB in the beginning and 62.2MB in the end (delta: 158.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.29ms. Allocated memory is still 153.1MB. Free memory was 107.4MB in the beginning and 96.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.86ms. Allocated memory is still 153.1MB. Free memory was 96.9MB in the beginning and 95.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 24.36ms. Allocated memory is still 153.1MB. Free memory was 95.7MB in the beginning and 94.8MB in the end (delta: 882.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 351.91ms. Allocated memory is still 153.1MB. Free memory was 94.8MB in the beginning and 84.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 12185.77ms. Allocated memory was 153.1MB in the beginning and 184.5MB in the end (delta: 31.5MB). Free memory was 83.7MB in the beginning and 85.4MB in the end (delta: -1.7MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. * Witness Printer took 92.46ms. Allocated memory is still 184.5MB. Free memory was 85.4MB in the beginning and 81.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.1s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 121 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 102 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 252 IncrementalHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 19 mSDtfsCounter, 252 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=2, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 56 HoareAnnotationTreeSize, 5 FomulaSimplifications, 7 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 116 ConstructedInterpolants, 5 QuantifiedInterpolants, 1115 SizeOfPredicates, 20 NumberOfNonLiveVariables, 192 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 46/93 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-23 20:36:30,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed77bee-77d4-4685-b18b-779bb6348ef0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE