./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:39:26,596 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:39:26,661 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:39:26,665 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:39:26,666 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:39:26,689 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:39:26,689 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:39:26,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:39:26,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:39:26,691 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:39:26,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:39:26,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:39:26,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:39:26,694 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:39:26,694 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:39:26,695 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:39:26,695 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:39:26,696 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:39:26,696 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:39:26,696 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:39:26,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:39:26,698 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:39:26,698 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:39:26,699 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:39:26,699 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:39:26,699 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:39:26,700 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:39:26,700 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:39:26,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:39:26,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:39:26,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:39:26,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:39:26,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:39:26,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:39:26,703 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:39:26,703 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:39:26,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:39:26,703 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:39:26,703 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:39:26,704 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:39:26,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:39:26,704 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:39:26,704 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 [2023-11-29 05:39:26,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:39:26,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:39:26,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:39:26,951 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:39:26,952 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:39:26,953 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2023-11-29 05:39:29,732 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:39:29,889 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:39:29,890 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2023-11-29 05:39:29,897 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/data/0c7a1c7a3/7a853f09217d40dbb3a7c032dbc80396/FLAGa9af0a297 [2023-11-29 05:39:29,913 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/data/0c7a1c7a3/7a853f09217d40dbb3a7c032dbc80396 [2023-11-29 05:39:29,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:39:29,917 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:39:29,918 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:39:29,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:39:29,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:39:29,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:39:29" (1/1) ... [2023-11-29 05:39:29,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f78e730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:29, skipping insertion in model container [2023-11-29 05:39:29,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:39:29" (1/1) ... [2023-11-29 05:39:29,946 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:39:30,123 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_4e5d617a-a933-4254-bf9f-1c89bd621565/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c[946,959] [2023-11-29 05:39:30,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:39:30,139 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:39:30,155 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_4e5d617a-a933-4254-bf9f-1c89bd621565/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c[946,959] [2023-11-29 05:39:30,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:39:30,171 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:39:30,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30 WrapperNode [2023-11-29 05:39:30,172 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:39:30,173 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:39:30,173 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:39:30,173 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:39:30,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,188 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,205 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2023-11-29 05:39:30,205 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:39:30,206 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:39:30,206 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:39:30,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:39:30,218 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,218 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,219 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,232 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 05:39:30,232 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,232 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,235 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,237 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,238 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,241 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:39:30,242 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:39:30,242 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:39:30,242 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:39:30,243 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (1/1) ... [2023-11-29 05:39:30,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:39:30,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:30,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:39:30,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:39:30,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:39:30,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:39:30,314 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-11-29 05:39:30,314 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-11-29 05:39:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-11-29 05:39:30,315 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-11-29 05:39:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:39:30,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:39:30,375 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:39:30,377 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:39:30,483 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:39:30,502 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:39:30,502 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-29 05:39:30,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:39:30 BoogieIcfgContainer [2023-11-29 05:39:30,502 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:39:30,505 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:39:30,505 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:39:30,509 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:39:30,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:39:29" (1/3) ... [2023-11-29 05:39:30,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0a15fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:39:30, skipping insertion in model container [2023-11-29 05:39:30,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:39:30" (2/3) ... [2023-11-29 05:39:30,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0a15fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:39:30, skipping insertion in model container [2023-11-29 05:39:30,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:39:30" (3/3) ... [2023-11-29 05:39:30,512 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2023-11-29 05:39:30,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:39:30,532 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:39:30,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:39:30,585 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=PETRI_NET, 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;@2ac4c70e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:39:30,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:39:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 05:39:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:39:30,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:30,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:30,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:30,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash -389521846, now seen corresponding path program 1 times [2023-11-29 05:39:30,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:30,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924073087] [2023-11-29 05:39:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:30,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:30,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:30,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:30,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924073087] [2023-11-29 05:39:30,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924073087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:39:30,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:39:30,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:39:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880972994] [2023-11-29 05:39:30,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:39:30,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:39:30,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:30,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:39:30,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:39:30,895 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 1.75) 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) [2023-11-29 05:39:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:30,984 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-29 05:39:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:39:30,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 [2023-11-29 05:39:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:30,996 INFO L225 Difference]: With dead ends: 34 [2023-11-29 05:39:30,996 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 05:39:30,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:39:31,004 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:31,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 73 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:39:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 05:39:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 05:39:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-29 05:39:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-29 05:39:31,050 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2023-11-29 05:39:31,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:31,051 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-29 05:39:31,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2023-11-29 05:39:31,051 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-29 05:39:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 05:39:31,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:31,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:31,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:39:31,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:31,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:31,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1524884472, now seen corresponding path program 1 times [2023-11-29 05:39:31,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:31,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733980428] [2023-11-29 05:39:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:31,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:31,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:31,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:31,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733980428] [2023-11-29 05:39:31,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733980428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:39:31,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:39:31,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:39:31,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832842115] [2023-11-29 05:39:31,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:39:31,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:39:31,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:31,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:39:31,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:39:31,151 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:39:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:31,204 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-11-29 05:39:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:39:31,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-29 05:39:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:31,206 INFO L225 Difference]: With dead ends: 32 [2023-11-29 05:39:31,206 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 05:39:31,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:39:31,208 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:31,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:39:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 05:39:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-11-29 05:39:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-29 05:39:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-29 05:39:31,218 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2023-11-29 05:39:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:31,218 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-29 05:39:31,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:39:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-29 05:39:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 05:39:31,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:31,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:31,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:39:31,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:31,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash 741502751, now seen corresponding path program 1 times [2023-11-29 05:39:31,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:31,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666747950] [2023-11-29 05:39:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:31,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:31,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:31,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:39:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:39:31,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:31,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666747950] [2023-11-29 05:39:31,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666747950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:31,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970497281] [2023-11-29 05:39:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:31,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:31,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:31,385 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:31,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:39:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:31,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:39:31,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:39:31,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:39:31,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970497281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:31,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:31,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-11-29 05:39:31,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816853673] [2023-11-29 05:39:31,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:31,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:39:31,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:31,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:39:31,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:39:31,743 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 05:39:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:31,939 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2023-11-29 05:39:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:39:31,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 22 [2023-11-29 05:39:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:31,941 INFO L225 Difference]: With dead ends: 54 [2023-11-29 05:39:31,941 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 05:39:31,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:39:31,943 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:31,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 05:39:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-11-29 05:39:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 05:39:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-29 05:39:31,952 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 22 [2023-11-29 05:39:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:31,952 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-29 05:39:31,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 05:39:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-29 05:39:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 05:39:31,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:31,954 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] [2023-11-29 05:39:31,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:39:32,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:32,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:32,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1785876995, now seen corresponding path program 1 times [2023-11-29 05:39:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:32,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092210229] [2023-11-29 05:39:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:32,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:32,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:32,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:39:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:39:32,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:32,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092210229] [2023-11-29 05:39:32,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092210229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:32,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796931988] [2023-11-29 05:39:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:32,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:32,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:32,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:32,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:39:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:32,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:39:32,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:39:32,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:39:32,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796931988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:32,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:32,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-11-29 05:39:32,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618175029] [2023-11-29 05:39:32,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:32,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:39:32,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:32,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:39:32,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:39:32,584 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:39:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:32,729 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2023-11-29 05:39:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:39:32,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 23 [2023-11-29 05:39:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:32,733 INFO L225 Difference]: With dead ends: 50 [2023-11-29 05:39:32,733 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 05:39:32,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:39:32,735 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:32,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 63 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 05:39:32,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-11-29 05:39:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-29 05:39:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-11-29 05:39:32,747 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 23 [2023-11-29 05:39:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:32,748 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-11-29 05:39:32,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:39:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-11-29 05:39:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 05:39:32,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:32,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:32,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:39:32,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 05:39:32,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:32,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:32,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1754399412, now seen corresponding path program 1 times [2023-11-29 05:39:32,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:32,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554201726] [2023-11-29 05:39:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:32,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:32,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:33,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:33,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:33,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:39:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:33,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-29 05:39:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:33,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:33,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554201726] [2023-11-29 05:39:33,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554201726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:33,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336922162] [2023-11-29 05:39:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:33,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:33,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:33,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:39:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:33,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:39:33,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:39:33,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:39:33,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336922162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:33,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:33,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2023-11-29 05:39:33,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404610374] [2023-11-29 05:39:33,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:33,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:39:33,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:33,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:39:33,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:39:33,585 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-29 05:39:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:33,831 INFO L93 Difference]: Finished difference Result 104 states and 166 transitions. [2023-11-29 05:39:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:39:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 35 [2023-11-29 05:39:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:33,834 INFO L225 Difference]: With dead ends: 104 [2023-11-29 05:39:33,834 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 05:39:33,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:39:33,836 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:33,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 130 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 05:39:33,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-29 05:39:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.25) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2023-11-29 05:39:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 91 transitions. [2023-11-29 05:39:33,851 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 91 transitions. Word has length 35 [2023-11-29 05:39:33,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:33,851 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 91 transitions. [2023-11-29 05:39:33,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-29 05:39:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 91 transitions. [2023-11-29 05:39:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 05:39:33,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:33,854 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:33,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:39:34,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:34,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:34,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:34,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2101254926, now seen corresponding path program 1 times [2023-11-29 05:39:34,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:34,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170714663] [2023-11-29 05:39:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:34,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:34,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:34,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:34,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:34,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:39:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:34,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 05:39:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:39:34,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:34,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170714663] [2023-11-29 05:39:34,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170714663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:34,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273060471] [2023-11-29 05:39:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:34,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:34,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:34,214 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:34,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:39:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:34,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:39:34,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:34,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:39:34,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273060471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:34,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:34,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2023-11-29 05:39:34,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396746813] [2023-11-29 05:39:34,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:34,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:39:34,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:34,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:39:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:39:34,695 INFO L87 Difference]: Start difference. First operand 62 states and 91 transitions. Second operand has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-29 05:39:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:34,981 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2023-11-29 05:39:34,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:39:34,982 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) Word has length 36 [2023-11-29 05:39:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:34,986 INFO L225 Difference]: With dead ends: 176 [2023-11-29 05:39:34,986 INFO L226 Difference]: Without dead ends: 116 [2023-11-29 05:39:34,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:39:34,989 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:34,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 180 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:39:34,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-29 05:39:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2023-11-29 05:39:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 68 states have internal predecessors, (79), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2023-11-29 05:39:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 165 transitions. [2023-11-29 05:39:35,015 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 165 transitions. Word has length 36 [2023-11-29 05:39:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:35,015 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 165 transitions. [2023-11-29 05:39:35,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-29 05:39:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 165 transitions. [2023-11-29 05:39:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 05:39:35,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:35,020 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:35,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 05:39:35,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:35,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:35,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:35,225 INFO L85 PathProgramCache]: Analyzing trace with hash 644290867, now seen corresponding path program 1 times [2023-11-29 05:39:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:35,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29431656] [2023-11-29 05:39:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:35,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:35,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:35,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:35,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:35,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:35,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:39:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:35,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 05:39:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:35,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 05:39:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 05:39:35,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:35,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29431656] [2023-11-29 05:39:35,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29431656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:35,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258788148] [2023-11-29 05:39:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:35,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:35,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:35,402 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:35,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:39:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:35,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:39:35,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 05:39:35,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 05:39:35,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258788148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:35,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:35,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2023-11-29 05:39:35,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560650378] [2023-11-29 05:39:35,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:35,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:39:35,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:39:35,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:39:35,831 INFO L87 Difference]: Start difference. First operand 102 states and 165 transitions. Second operand has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 16 states have internal predecessors, (52), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-29 05:39:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:36,109 INFO L93 Difference]: Finished difference Result 261 states and 507 transitions. [2023-11-29 05:39:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:39:36,110 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 16 states have internal predecessors, (52), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 50 [2023-11-29 05:39:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:36,113 INFO L225 Difference]: With dead ends: 261 [2023-11-29 05:39:36,114 INFO L226 Difference]: Without dead ends: 161 [2023-11-29 05:39:36,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:39:36,116 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:36,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 181 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:39:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-29 05:39:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2023-11-29 05:39:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 90 states have internal predecessors, (106), 31 states have call successors, (31), 10 states have call predecessors, (31), 18 states have return successors, (103), 37 states have call predecessors, (103), 31 states have call successors, (103) [2023-11-29 05:39:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 240 transitions. [2023-11-29 05:39:36,149 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 240 transitions. Word has length 50 [2023-11-29 05:39:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:36,150 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 240 transitions. [2023-11-29 05:39:36,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 16 states have internal predecessors, (52), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-29 05:39:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 240 transitions. [2023-11-29 05:39:36,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 05:39:36,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:36,154 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:36,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:39:36,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:36,359 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:36,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:36,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1667877015, now seen corresponding path program 1 times [2023-11-29 05:39:36,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:36,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621291386] [2023-11-29 05:39:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:36,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:36,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:36,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:36,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:36,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:39:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:36,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 05:39:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:36,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 05:39:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 05:39:36,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621291386] [2023-11-29 05:39:36,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621291386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505309145] [2023-11-29 05:39:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:36,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:36,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:36,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:36,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:39:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:36,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:39:36,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 05:39:36,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 05:39:36,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505309145] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:36,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:36,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2023-11-29 05:39:36,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758664207] [2023-11-29 05:39:36,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:36,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:39:36,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:36,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:39:36,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:39:36,849 INFO L87 Difference]: Start difference. First operand 138 states and 240 transitions. Second operand has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-29 05:39:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:37,088 INFO L93 Difference]: Finished difference Result 300 states and 579 transitions. [2023-11-29 05:39:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:39:37,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 51 [2023-11-29 05:39:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:37,091 INFO L225 Difference]: With dead ends: 300 [2023-11-29 05:39:37,091 INFO L226 Difference]: Without dead ends: 97 [2023-11-29 05:39:37,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:39:37,094 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:37,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 147 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:39:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-29 05:39:37,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2023-11-29 05:39:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 16 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (46), 19 states have call predecessors, (46), 16 states have call successors, (46) [2023-11-29 05:39:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 122 transitions. [2023-11-29 05:39:37,122 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 122 transitions. Word has length 51 [2023-11-29 05:39:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:37,123 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 122 transitions. [2023-11-29 05:39:37,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-29 05:39:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 122 transitions. [2023-11-29 05:39:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 05:39:37,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:37,125 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:37,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:39:37,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:37,327 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:37,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:37,327 INFO L85 PathProgramCache]: Analyzing trace with hash -680250868, now seen corresponding path program 2 times [2023-11-29 05:39:37,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:37,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647312788] [2023-11-29 05:39:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:37,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:37,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:37,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:37,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:37,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:37,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:39:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:37,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 05:39:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:37,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 05:39:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:37,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:37,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:39:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 05:39:37,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:37,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647312788] [2023-11-29 05:39:37,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647312788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:37,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963747389] [2023-11-29 05:39:37,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:39:37,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:37,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:37,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:39:37,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:39:37,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:37,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:39:37,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 05:39:37,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 05:39:38,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963747389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:38,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:38,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 22 [2023-11-29 05:39:38,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448421807] [2023-11-29 05:39:38,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:38,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:39:38,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:39:38,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:39:38,118 INFO L87 Difference]: Start difference. First operand 79 states and 122 transitions. Second operand has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-29 05:39:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:38,480 INFO L93 Difference]: Finished difference Result 170 states and 289 transitions. [2023-11-29 05:39:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:39:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) Word has length 65 [2023-11-29 05:39:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:38,482 INFO L225 Difference]: With dead ends: 170 [2023-11-29 05:39:38,483 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 05:39:38,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:39:38,485 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:38,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 236 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:39:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 05:39:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2023-11-29 05:39:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 12 states have call successors, (12), 8 states have call predecessors, (12), 11 states have return successors, (31), 16 states have call predecessors, (31), 12 states have call successors, (31) [2023-11-29 05:39:38,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2023-11-29 05:39:38,495 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 65 [2023-11-29 05:39:38,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:38,495 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2023-11-29 05:39:38,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-29 05:39:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2023-11-29 05:39:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 05:39:38,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:38,497 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:38,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:39:38,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:38,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:38,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:38,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1164844098, now seen corresponding path program 1 times [2023-11-29 05:39:38,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:38,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794933047] [2023-11-29 05:39:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:38,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:38,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:38,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:38,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:38,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:38,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:39:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 05:39:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 05:39:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:39:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-29 05:39:39,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:39,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794933047] [2023-11-29 05:39:39,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794933047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:39,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473510759] [2023-11-29 05:39:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:39,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:39,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:39,095 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:39,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:39:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 05:39:39,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-29 05:39:39,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-29 05:39:39,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473510759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:39,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:39,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 21 [2023-11-29 05:39:39,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446145808] [2023-11-29 05:39:39,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:39,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:39:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:39:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:39:39,500 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-29 05:39:39,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:39,627 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2023-11-29 05:39:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:39:39,628 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) Word has length 64 [2023-11-29 05:39:39,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:39,629 INFO L225 Difference]: With dead ends: 93 [2023-11-29 05:39:39,629 INFO L226 Difference]: Without dead ends: 89 [2023-11-29 05:39:39,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:39:39,631 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:39,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 615 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-29 05:39:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2023-11-29 05:39:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 14 states have call successors, (14), 8 states have call predecessors, (14), 13 states have return successors, (38), 20 states have call predecessors, (38), 14 states have call successors, (38) [2023-11-29 05:39:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2023-11-29 05:39:39,641 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 64 [2023-11-29 05:39:39,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:39,641 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2023-11-29 05:39:39,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-29 05:39:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2023-11-29 05:39:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 05:39:39,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:39,643 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:39,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:39:39,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:39,849 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:39,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:39,850 INFO L85 PathProgramCache]: Analyzing trace with hash -976355400, now seen corresponding path program 1 times [2023-11-29 05:39:39,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:39,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550941880] [2023-11-29 05:39:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:39,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:39:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:39,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:39:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:40,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-29 05:39:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:40,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 05:39:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:40,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:39:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:40,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:39:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 05:39:40,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:40,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550941880] [2023-11-29 05:39:40,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550941880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:40,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998190769] [2023-11-29 05:39:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:40,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:40,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:40,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:40,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:39:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:40,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:39:40,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 05:39:40,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 05:39:40,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998190769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:40,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:40,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2023-11-29 05:39:40,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421825337] [2023-11-29 05:39:40,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:40,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:39:40,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:40,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:39:40,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:39:40,657 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 11 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (20), 8 states have call predecessors, (20), 11 states have call successors, (20) [2023-11-29 05:39:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:40,831 INFO L93 Difference]: Finished difference Result 158 states and 233 transitions. [2023-11-29 05:39:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:39:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 11 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (20), 8 states have call predecessors, (20), 11 states have call successors, (20) Word has length 65 [2023-11-29 05:39:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:40,832 INFO L225 Difference]: With dead ends: 158 [2023-11-29 05:39:40,832 INFO L226 Difference]: Without dead ends: 0 [2023-11-29 05:39:40,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:39:40,834 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:40,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-29 05:39:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-29 05:39:40,835 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) [2023-11-29 05:39:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-29 05:39:40,836 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2023-11-29 05:39:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:40,836 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-29 05:39:40,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 11 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (20), 8 states have call predecessors, (20), 11 states have call successors, (20) [2023-11-29 05:39:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-29 05:39:40,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-29 05:39:40,838 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 05:39:40,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:39:41,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:39:41,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-29 05:39:41,329 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-29 05:39:41,330 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2023-11-29 05:39:41,330 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-29 05:39:41,330 INFO L899 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2023-11-29 05:39:41,330 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2023-11-29 05:39:41,331 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (= |ULTIMATE.start_main_~x~0#1| 4) [2023-11-29 05:39:41,331 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2023-11-29 05:39:41,331 INFO L899 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2023-11-29 05:39:41,331 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 2 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2023-11-29 05:39:41,332 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-11-29 05:39:41,332 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (or (and (= |fibo2_#t~ret6| 1) (= 2 |fibo2_#in~n|)) (< 3 |fibo2_#in~n|))) [2023-11-29 05:39:41,332 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2023-11-29 05:39:41,332 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2023-11-29 05:39:41,332 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2023-11-29 05:39:41,332 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2023-11-29 05:39:41,333 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 27) the Hoare annotation is: true [2023-11-29 05:39:41,333 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2023-11-29 05:39:41,333 INFO L895 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (< 2 |fibo1_#in~n|)) [2023-11-29 05:39:41,333 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2023-11-29 05:39:41,333 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (= 2 |fibo1_#t~ret4|) (= |fibo1_#in~n| 4) (= fibo1_~n 4)) (and (= |fibo1_#t~ret4| 1) (<= |fibo1_#in~n| 3) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (< 2 |fibo1_#in~n|)) [2023-11-29 05:39:41,333 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2023-11-29 05:39:41,334 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2023-11-29 05:39:41,334 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2023-11-29 05:39:41,334 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2023-11-29 05:39:41,334 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 17) the Hoare annotation is: true [2023-11-29 05:39:41,334 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2023-11-29 05:39:41,337 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:41,339 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 05:39:41,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 05:39:41 BoogieIcfgContainer [2023-11-29 05:39:41,343 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 05:39:41,344 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 05:39:41,344 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 05:39:41,345 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 05:39:41,345 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:39:30" (3/4) ... [2023-11-29 05:39:41,347 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 05:39:41,350 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2023-11-29 05:39:41,350 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2023-11-29 05:39:41,354 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-11-29 05:39:41,354 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-29 05:39:41,355 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-29 05:39:41,355 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-29 05:39:41,424 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 05:39:41,424 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 05:39:41,425 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 05:39:41,425 INFO L158 Benchmark]: Toolchain (without parser) took 11508.57ms. Allocated memory was 163.6MB in the beginning and 237.0MB in the end (delta: 73.4MB). Free memory was 122.3MB in the beginning and 196.1MB in the end (delta: -73.8MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:39:41,426 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 113.2MB. Free memory is still 80.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:39:41,426 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.26ms. Allocated memory is still 163.6MB. Free memory was 121.6MB in the beginning and 130.0MB in the end (delta: -8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-29 05:39:41,426 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.86ms. Allocated memory is still 163.6MB. Free memory was 130.0MB in the beginning and 128.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:39:41,427 INFO L158 Benchmark]: Boogie Preprocessor took 35.00ms. Allocated memory is still 163.6MB. Free memory was 128.6MB in the beginning and 127.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 05:39:41,427 INFO L158 Benchmark]: RCFGBuilder took 260.75ms. Allocated memory is still 163.6MB. Free memory was 127.2MB in the beginning and 116.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 05:39:41,428 INFO L158 Benchmark]: TraceAbstraction took 10838.52ms. Allocated memory was 163.6MB in the beginning and 237.0MB in the end (delta: 73.4MB). Free memory was 115.3MB in the beginning and 200.3MB in the end (delta: -85.0MB). Peak memory consumption was 96.7MB. Max. memory is 16.1GB. [2023-11-29 05:39:41,428 INFO L158 Benchmark]: Witness Printer took 80.44ms. Allocated memory is still 237.0MB. Free memory was 200.3MB in the beginning and 196.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 05:39:41,430 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 113.2MB. Free memory is still 80.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.26ms. Allocated memory is still 163.6MB. Free memory was 121.6MB in the beginning and 130.0MB in the end (delta: -8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.86ms. Allocated memory is still 163.6MB. Free memory was 130.0MB in the beginning and 128.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.00ms. Allocated memory is still 163.6MB. Free memory was 128.6MB in the beginning and 127.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 260.75ms. Allocated memory is still 163.6MB. Free memory was 127.2MB in the beginning and 116.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10838.52ms. Allocated memory was 163.6MB in the beginning and 237.0MB in the end (delta: 73.4MB). Free memory was 115.3MB in the beginning and 200.3MB in the end (delta: -85.0MB). Peak memory consumption was 96.7MB. Max. memory is 16.1GB. * Witness Printer took 80.44ms. Allocated memory is still 237.0MB. Free memory was 200.3MB in the beginning and 196.1MB 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: 41]: 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 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.8s, OverallIterations: 11, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 435 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 368 mSDsluCounter, 1939 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1668 mSDsCounter, 258 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2016 IncrementalHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 258 mSolverCounterUnsat, 271 mSDtfsCounter, 2016 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1091 GetRequests, 876 SyntacticMatches, 27 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=7, InterpolantAutomatonStates: 141, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 73 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 400 PreInvPairs, 485 NumberOfFragments, 66 HoareAnnotationTreeSize, 400 FomulaSimplifications, 1751 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 613 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 841 NumberOfCodeBlocks, 841 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1223 ConstructedInterpolants, 0 QuantifiedInterpolants, 2635 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1101 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 816/1143 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! [2023-11-29 05:39:41,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5d617a-a933-4254-bf9f-1c89bd621565/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE