./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/gcd01-1.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_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/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_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/gcd01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/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_af607311-e966-49bb-a096-7c7621e88e3a/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 ceea5216a7b51ee21eab36f0e9b129c25f18193871fb4ca0aa52ef8740fc0ce8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:43:25,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:43:25,769 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:43:25,774 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:43:25,774 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:43:25,800 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:43:25,800 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:43:25,801 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:43:25,802 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:43:25,802 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:43:25,803 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:43:25,803 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:43:25,804 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:43:25,805 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:43:25,805 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:43:25,806 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:43:25,806 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:43:25,807 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:43:25,807 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:43:25,808 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:43:25,808 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:43:25,809 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:43:25,809 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:43:25,810 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:43:25,810 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:43:25,811 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:43:25,811 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:43:25,812 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:43:25,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:43:25,812 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:43:25,813 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:43:25,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:43:25,814 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:43:25,814 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:43:25,815 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:43:25,815 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:43:25,815 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:43:25,815 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:43:25,816 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:43:25,816 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:43:25,816 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:43:25,816 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:43:25,817 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_af607311-e966-49bb-a096-7c7621e88e3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceea5216a7b51ee21eab36f0e9b129c25f18193871fb4ca0aa52ef8740fc0ce8 [2023-11-28 20:43:26,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:43:26,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:43:26,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:43:26,063 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:43:26,063 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:43:26,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursive/gcd01-1.c [2023-11-28 20:43:28,868 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:43:29,019 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:43:29,019 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/sv-benchmarks/c/recursive/gcd01-1.c [2023-11-28 20:43:29,026 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/data/b74d61ce3/988e722c704f4ff7a8272d6b5fbc6e80/FLAG9c6d78ea6 [2023-11-28 20:43:29,041 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/data/b74d61ce3/988e722c704f4ff7a8272d6b5fbc6e80 [2023-11-28 20:43:29,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:43:29,047 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:43:29,048 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:43:29,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:43:29,053 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:43:29,054 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,054 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bf78afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29, skipping insertion in model container [2023-11-28 20:43:29,055 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,073 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:43:29,197 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_af607311-e966-49bb-a096-7c7621e88e3a/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2023-11-28 20:43:29,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:43:29,209 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:43:29,223 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_af607311-e966-49bb-a096-7c7621e88e3a/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2023-11-28 20:43:29,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:43:29,235 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:43:29,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29 WrapperNode [2023-11-28 20:43:29,236 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:43:29,237 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:43:29,237 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:43:29,237 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:43:29,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,249 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,263 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2023-11-28 20:43:29,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:43:29,264 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:43:29,264 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:43:29,264 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:43:29,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,274 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,285 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]. [2023-11-28 20:43:29,285 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,286 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,289 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,291 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,292 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,293 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:43:29,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:43:29,296 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:43:29,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:43:29,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (1/1) ... [2023-11-28 20:43:29,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:43:29,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:29,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:43:29,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:43:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:43:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2023-11-28 20:43:29,356 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2023-11-28 20:43:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:43:29,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:43:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:43:29,423 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:43:29,425 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:43:29,562 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:43:29,583 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:43:29,584 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-28 20:43:29,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:43:29 BoogieIcfgContainer [2023-11-28 20:43:29,585 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:43:29,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:43:29,588 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:43:29,591 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:43:29,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:43:29" (1/3) ... [2023-11-28 20:43:29,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2da799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:43:29, skipping insertion in model container [2023-11-28 20:43:29,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:29" (2/3) ... [2023-11-28 20:43:29,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2da799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:43:29, skipping insertion in model container [2023-11-28 20:43:29,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:43:29" (3/3) ... [2023-11-28 20:43:29,594 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2023-11-28 20:43:29,613 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:43:29,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:43:29,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:43:29,660 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;@263b12b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:43:29,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:43:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-28 20:43:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-28 20:43:29,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:29,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:29,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:29,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash -672472283, now seen corresponding path program 1 times [2023-11-28 20:43:29,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:29,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080541111] [2023-11-28 20:43:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:29,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:29,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 20:43:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:30,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:30,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080541111] [2023-11-28 20:43:30,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080541111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:30,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:30,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:43:30,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531155901] [2023-11-28 20:43:30,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:30,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:43:30,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:30,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:43:30,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:43:30,109 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2023-11-28 20:43:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:30,212 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2023-11-28 20:43:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:43:30,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 11 [2023-11-28 20:43:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:30,222 INFO L225 Difference]: With dead ends: 30 [2023-11-28 20:43:30,222 INFO L226 Difference]: Without dead ends: 20 [2023-11-28 20:43:30,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:43:30,228 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:30,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 33 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:43:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-28 20:43:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-28 20:43:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-28 20:43:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-28 20:43:30,266 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2023-11-28 20:43:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:30,267 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-28 20:43:30,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2023-11-28 20:43:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-28 20:43:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-28 20:43:30,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:30,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:30,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:43:30,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:30,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:30,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1200358745, now seen corresponding path program 1 times [2023-11-28 20:43:30,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:30,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436052230] [2023-11-28 20:43:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:30,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 20:43:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:30,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:30,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436052230] [2023-11-28 20:43:30,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436052230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:30,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:30,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:43:30,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246478927] [2023-11-28 20:43:30,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:30,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:43:30,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:30,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:43:30,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:43:30,381 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-11-28 20:43:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:30,422 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-28 20:43:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:43:30,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 12 [2023-11-28 20:43:30,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:30,424 INFO L225 Difference]: With dead ends: 26 [2023-11-28 20:43:30,424 INFO L226 Difference]: Without dead ends: 22 [2023-11-28 20:43:30,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:43:30,426 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:30,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 81 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:43:30,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-28 20:43:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-11-28 20:43:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-28 20:43:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-28 20:43:30,435 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2023-11-28 20:43:30,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:30,435 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-28 20:43:30,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-11-28 20:43:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-28 20:43:30,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-28 20:43:30,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:30,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:30,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:43:30,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:30,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:30,438 INFO L85 PathProgramCache]: Analyzing trace with hash -229059489, now seen corresponding path program 1 times [2023-11-28 20:43:30,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:30,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837133574] [2023-11-28 20:43:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:30,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 20:43:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-28 20:43:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:43:30,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:30,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837133574] [2023-11-28 20:43:30,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837133574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:30,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:30,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:43:30,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771705399] [2023-11-28 20:43:30,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:30,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:43:30,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:43:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:43:30,609 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 20:43:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:30,702 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2023-11-28 20:43:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:43:30,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-28 20:43:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:30,704 INFO L225 Difference]: With dead ends: 32 [2023-11-28 20:43:30,704 INFO L226 Difference]: Without dead ends: 24 [2023-11-28 20:43:30,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:43:30,706 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:30,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:43:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-28 20:43:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-28 20:43:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-28 20:43:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-28 20:43:30,715 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2023-11-28 20:43:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:30,715 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-28 20:43:30,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 20:43:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-28 20:43:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-28 20:43:30,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:30,717 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:30,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:43:30,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:30,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:30,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1574819235, now seen corresponding path program 1 times [2023-11-28 20:43:30,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:30,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297212584] [2023-11-28 20:43:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:30,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 20:43:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-28 20:43:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:43:30,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:30,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297212584] [2023-11-28 20:43:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297212584] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:30,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:30,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:43:30,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995313935] [2023-11-28 20:43:30,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:30,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:43:30,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:30,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:43:30,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:43:30,873 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 20:43:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:30,972 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-11-28 20:43:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:43:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-28 20:43:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:30,974 INFO L225 Difference]: With dead ends: 32 [2023-11-28 20:43:30,974 INFO L226 Difference]: Without dead ends: 22 [2023-11-28 20:43:30,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:43:30,976 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:30,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 45 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:43:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-28 20:43:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-11-28 20:43:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-28 20:43:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-28 20:43:30,984 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 19 [2023-11-28 20:43:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:30,984 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-28 20:43:30,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 20:43:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-28 20:43:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-28 20:43:30,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:30,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:30,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:43:30,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:30,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1175015767, now seen corresponding path program 1 times [2023-11-28 20:43:30,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:30,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315734464] [2023-11-28 20:43:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:30,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 20:43:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-28 20:43:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:43:31,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:31,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315734464] [2023-11-28 20:43:31,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315734464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:31,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126620684] [2023-11-28 20:43:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:31,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:31,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:31,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:31,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:43:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-28 20:43:31,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 20:43:31,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126620684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:31,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:43:31,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 10 [2023-11-28 20:43:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888831342] [2023-11-28 20:43:31,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:43:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:43:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:43:31,236 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:43:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:31,285 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-28 20:43:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:43:31,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-28 20:43:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:31,287 INFO L225 Difference]: With dead ends: 27 [2023-11-28 20:43:31,287 INFO L226 Difference]: Without dead ends: 23 [2023-11-28 20:43:31,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:43:31,289 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:31,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 85 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:43:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-28 20:43:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-11-28 20:43:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-28 20:43:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-28 20:43:31,296 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 20 [2023-11-28 20:43:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:31,297 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-28 20:43:31,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-28 20:43:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-28 20:43:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-28 20:43:31,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:31,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:31,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:43:31,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:31,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:31,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash 63835465, now seen corresponding path program 1 times [2023-11-28 20:43:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:31,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432206141] [2023-11-28 20:43:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 20:43:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-28 20:43:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:43:31,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:31,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432206141] [2023-11-28 20:43:31,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432206141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:31,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:31,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:43:31,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181805665] [2023-11-28 20:43:31,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:31,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:43:31,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:31,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:43:31,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:43:31,608 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 20:43:31,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:31,650 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-28 20:43:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:43:31,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-28 20:43:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:31,651 INFO L225 Difference]: With dead ends: 30 [2023-11-28 20:43:31,652 INFO L226 Difference]: Without dead ends: 26 [2023-11-28 20:43:31,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:43:31,653 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:31,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:43:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-28 20:43:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-28 20:43:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-28 20:43:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-28 20:43:31,660 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2023-11-28 20:43:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:31,661 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-28 20:43:31,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-28 20:43:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-28 20:43:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-28 20:43:31,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:31,663 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:31,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:43:31,663 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:31,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:31,663 INFO L85 PathProgramCache]: Analyzing trace with hash 915558905, now seen corresponding path program 1 times [2023-11-28 20:43:31,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:31,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145322599] [2023-11-28 20:43:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:31,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-28 20:43:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-28 20:43:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-28 20:43:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-28 20:43:31,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:31,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145322599] [2023-11-28 20:43:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145322599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:31,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702097961] [2023-11-28 20:43:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:31,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:31,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:31,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:31,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:43:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:43:31,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-28 20:43:31,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:31,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702097961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:31,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:43:31,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2023-11-28 20:43:31,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904377807] [2023-11-28 20:43:31,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:31,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:43:31,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:31,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:43:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:43:31,933 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-28 20:43:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:31,989 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-28 20:43:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:43:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-11-28 20:43:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:31,991 INFO L225 Difference]: With dead ends: 26 [2023-11-28 20:43:31,991 INFO L226 Difference]: Without dead ends: 0 [2023-11-28 20:43:31,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:43:31,992 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:31,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:43:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-28 20:43:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-28 20:43:31,994 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) [2023-11-28 20:43:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-28 20:43:31,994 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2023-11-28 20:43:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:31,995 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-28 20:43:31,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-28 20:43:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-28 20:43:31,995 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-28 20:43:31,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-28 20:43:32,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:43:32,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:32,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-28 20:43:32,251 INFO L899 garLoopResultBuilder]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2023-11-28 20:43:32,251 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= 1 gcd_~y1) (<= (+ gcd_~y1 1) gcd_~y2) (= gcd_~y1 |gcd_#in~y1|)) [2023-11-28 20:43:32,251 INFO L899 garLoopResultBuilder]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2023-11-28 20:43:32,251 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2023-11-28 20:43:32,252 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= (+ gcd_~y2 1) gcd_~y1)) [2023-11-28 20:43:32,252 INFO L899 garLoopResultBuilder]: For program point L24(lines 24 26) no Hoare annotation was computed. [2023-11-28 20:43:32,252 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-11-28 20:43:32,252 INFO L899 garLoopResultBuilder]: For program point L21(lines 21 23) no Hoare annotation was computed. [2023-11-28 20:43:32,252 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-11-28 20:43:32,252 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 28) the Hoare annotation is: true [2023-11-28 20:43:32,252 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-28 20:43:32,252 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 34) no Hoare annotation was computed. [2023-11-28 20:43:32,253 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2023-11-28 20:43:32,253 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-28 20:43:32,253 INFO L899 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2023-11-28 20:43:32,253 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 44) no Hoare annotation was computed. [2023-11-28 20:43:32,253 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~m~0#1|) (<= 1 |ULTIMATE.start_main_~n~0#1|)) [2023-11-28 20:43:32,253 INFO L899 garLoopResultBuilder]: For program point L40-1(lines 30 45) no Hoare annotation was computed. [2023-11-28 20:43:32,253 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2023-11-28 20:43:32,253 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2023-11-28 20:43:32,257 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:32,259 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-28 20:43:32,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:43:32 BoogieIcfgContainer [2023-11-28 20:43:32,263 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-28 20:43:32,263 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-28 20:43:32,263 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-28 20:43:32,264 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-28 20:43:32,264 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:43:29" (3/4) ... [2023-11-28 20:43:32,266 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-28 20:43:32,269 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2023-11-28 20:43:32,273 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-11-28 20:43:32,274 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-28 20:43:32,274 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-28 20:43:32,274 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-28 20:43:32,354 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-28 20:43:32,354 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-28 20:43:32,355 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-28 20:43:32,355 INFO L158 Benchmark]: Toolchain (without parser) took 3308.78ms. Allocated memory is still 161.5MB. Free memory was 122.9MB in the beginning and 126.1MB in the end (delta: -3.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:43:32,355 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory was 66.7MB in the beginning and 66.6MB in the end (delta: 98.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:43:32,356 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.94ms. Allocated memory is still 161.5MB. Free memory was 122.9MB in the beginning and 112.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 20:43:32,356 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.87ms. Allocated memory is still 161.5MB. Free memory was 112.4MB in the beginning and 110.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:43:32,356 INFO L158 Benchmark]: Boogie Preprocessor took 30.44ms. Allocated memory is still 161.5MB. Free memory was 110.8MB in the beginning and 109.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:43:32,357 INFO L158 Benchmark]: RCFGBuilder took 289.17ms. Allocated memory is still 161.5MB. Free memory was 109.5MB in the beginning and 98.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 20:43:32,357 INFO L158 Benchmark]: TraceAbstraction took 2675.54ms. Allocated memory is still 161.5MB. Free memory was 97.8MB in the beginning and 130.3MB in the end (delta: -32.5MB). Peak memory consumption was 59.6MB. Max. memory is 16.1GB. [2023-11-28 20:43:32,358 INFO L158 Benchmark]: Witness Printer took 91.28ms. Allocated memory is still 161.5MB. Free memory was 130.3MB in the beginning and 126.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-28 20:43:32,360 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory was 66.7MB in the beginning and 66.6MB in the end (delta: 98.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.94ms. Allocated memory is still 161.5MB. Free memory was 122.9MB in the beginning and 112.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.87ms. Allocated memory is still 161.5MB. Free memory was 112.4MB in the beginning and 110.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.44ms. Allocated memory is still 161.5MB. Free memory was 110.8MB in the beginning and 109.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 289.17ms. Allocated memory is still 161.5MB. Free memory was 109.5MB in the beginning and 98.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2675.54ms. Allocated memory is still 161.5MB. Free memory was 97.8MB in the beginning and 130.3MB in the end (delta: -32.5MB). Peak memory consumption was 59.6MB. Max. memory is 16.1GB. * Witness Printer took 91.28ms. Allocated memory is still 161.5MB. Free memory was 130.3MB in the beginning and 126.1MB 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 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 102 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 85 mSDsluCounter, 432 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 331 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 325 IncrementalHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 101 mSDtfsCounter, 325 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=6, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 10 NumberOfFragments, 38 HoareAnnotationTreeSize, 10 FomulaSimplifications, 30 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 177 NumberOfCodeBlocks, 177 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 395 SizeOfPredicates, 2 NumberOfNonLiveVariables, 175 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 49/55 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! [2023-11-28 20:43:32,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af607311-e966-49bb-a096-7c7621e88e3a/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