./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9487ed5fc7718c7bb93aff5600d08f7bd19c9300c599297a4a91d29e51f25e1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:11:16,901 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:11:16,966 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 20:11:16,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:11:16,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:11:16,996 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:11:16,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:11:16,997 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:11:16,998 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:11:16,999 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:11:16,999 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:11:17,000 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:11:17,000 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:11:17,001 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 20:11:17,001 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:11:17,001 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:11:17,002 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 20:11:17,002 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 20:11:17,003 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:11:17,003 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 20:11:17,004 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 20:11:17,004 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 20:11:17,005 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:11:17,005 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 20:11:17,006 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:11:17,006 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:11:17,006 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:11:17,007 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:11:17,007 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 20:11:17,007 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:11:17,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 20:11:17,008 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:11:17,008 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 20:11:17,009 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:11:17,009 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:11:17,009 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:11:17,009 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:11:17,009 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:11:17,010 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:11:17,010 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:11:17,010 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 20:11:17,010 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 20:11:17,010 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 20:11:17,011 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:11:17,011 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 20:11:17,011 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:11:17,011 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:11:17,011 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9487ed5fc7718c7bb93aff5600d08f7bd19c9300c599297a4a91d29e51f25e1 [2023-12-02 20:11:17,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:11:17,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:11:17,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:11:17,279 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:11:17,280 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:11:17,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/eca-rers2012/Problem14_label10.c [2023-12-02 20:11:20,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:11:20,279 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:11:20,280 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/sv-benchmarks/c/eca-rers2012/Problem14_label10.c [2023-12-02 20:11:20,295 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/data/627f5be40/4da666d6e0454cc38829d6e8b1178be8/FLAGabe7878e5 [2023-12-02 20:11:20,307 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/data/627f5be40/4da666d6e0454cc38829d6e8b1178be8 [2023-12-02 20:11:20,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:11:20,310 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:11:20,312 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:11:20,312 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:11:20,316 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:11:20,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@268752c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20, skipping insertion in model container [2023-12-02 20:11:20,318 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,369 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:11:20,518 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_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/sv-benchmarks/c/eca-rers2012/Problem14_label10.c[3052,3065] [2023-12-02 20:11:20,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:11:20,708 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:11:20,725 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_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/sv-benchmarks/c/eca-rers2012/Problem14_label10.c[3052,3065] [2023-12-02 20:11:20,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:11:20,830 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:11:20,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20 WrapperNode [2023-12-02 20:11:20,831 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:11:20,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:11:20,831 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:11:20,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:11:20,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,859 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,926 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2023-12-02 20:11:20,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:11:20,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:11:20,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:11:20,928 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:11:20,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,941 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,942 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,978 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,983 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:20,991 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:21,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:11:21,001 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:11:21,001 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:11:21,002 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:11:21,002 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (1/1) ... [2023-12-02 20:11:21,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:11:21,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:21,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:11:21,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:11:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:11:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 20:11:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:11:21,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:11:21,166 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:11:21,187 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:11:22,278 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:11:25,688 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:11:25,688 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 20:11:25,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:11:25 BoogieIcfgContainer [2023-12-02 20:11:25,690 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:11:25,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:11:25,693 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:11:25,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:11:25,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:11:20" (1/3) ... [2023-12-02 20:11:25,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dbaad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:11:25, skipping insertion in model container [2023-12-02 20:11:25,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:20" (2/3) ... [2023-12-02 20:11:25,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dbaad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:11:25, skipping insertion in model container [2023-12-02 20:11:25,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:11:25" (3/3) ... [2023-12-02 20:11:25,698 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label10.c [2023-12-02 20:11:25,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:11:25,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 20:11:25,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:11:25,763 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@20b48bc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:11:25,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 20:11:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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) [2023-12-02 20:11:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 20:11:25,772 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:25,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 20:11:25,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:11:25,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1058091267, now seen corresponding path program 1 times [2023-12-02 20:11:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297755280] [2023-12-02 20:11:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:25,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:25,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:25,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297755280] [2023-12-02 20:11:25,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297755280] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:25,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:25,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:11:25,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834806155] [2023-12-02 20:11:25,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:25,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:11:25,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:26,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:11:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:26,011 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-02 20:11:26,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:26,102 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2023-12-02 20:11:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:11:26,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) Word has length 5 [2023-12-02 20:11:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:26,111 INFO L225 Difference]: With dead ends: 23 [2023-12-02 20:11:26,111 INFO L226 Difference]: Without dead ends: 11 [2023-12-02 20:11:26,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:26,117 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:26,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:26,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-02 20:11:26,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2023-12-02 20:11:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2023-12-02 20:11:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-12-02 20:11:26,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2023-12-02 20:11:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:26,150 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-12-02 20:11:26,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-02 20:11:26,150 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-12-02 20:11:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 20:11:26,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:26,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-12-02 20:11:26,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 20:11:26,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:11:26,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1362253881, now seen corresponding path program 1 times [2023-12-02 20:11:26,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:26,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633370130] [2023-12-02 20:11:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:26,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:44,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:44,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633370130] [2023-12-02 20:11:44,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633370130] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:11:44,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931669627] [2023-12-02 20:11:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:44,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:44,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:44,468 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:44,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 20:11:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:44,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:11:44,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:47,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:54,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931669627] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:54,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276387076] [2023-12-02 20:11:54,604 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 20:11:54,604 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:11:54,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:11:54,612 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:11:54,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:11:55,894 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2023-12-02 20:11:56,232 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 12696 conjunctions. This might take some time... [2023-12-02 20:11:57,209 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 552 conjunctions. [2023-12-02 20:11:57,230 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2023-12-02 20:11:57,464 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 12696 conjunctions. This might take some time... [2023-12-02 20:11:58,402 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 552 conjunctions. [2023-12-02 20:16:29,656 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-12-02 20:16:29,762 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6324 conjunctions. This might take some time... [2023-12-02 20:16:29,948 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 276 conjunctions. [2023-12-02 20:16:29,950 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-12-02 20:16:30,030 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6324 conjunctions. This might take some time... [2023-12-02 20:16:30,215 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 276 conjunctions. [2023-12-02 20:22:33,840 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-12-02 20:22:33,920 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6324 conjunctions. This might take some time... [2023-12-02 20:22:34,103 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 276 conjunctions. [2023-12-02 20:22:34,106 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-12-02 20:22:34,184 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6324 conjunctions. This might take some time... [2023-12-02 20:22:34,368 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 276 conjunctions. [2023-12-02 20:22:34,736 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-12-02 20:22:34,815 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6324 conjunctions. This might take some time... [2023-12-02 20:22:34,998 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 276 conjunctions. [2023-12-02 20:22:35,884 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-12-02 20:22:35,962 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6324 conjunctions. This might take some time... [2023-12-02 20:22:36,145 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 276 conjunctions. [2023-12-02 20:22:36,311 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:22:37,328 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '109#(or (and (<= ~a12~0 80) (= ~a24~0 1) (= 7 ~a21~0) (<= 12 ~a12~0) (= 3 |ULTIMATE.start_calculate_output_#in~input#1|) (= 5 ~a15~0) (= 3 |ULTIMATE.start_main_~input~0#1|) (= |ULTIMATE.start_calculate_output_~input#1| 3)) (and (= |ULTIMATE.start_main_~input~0#1| 1) (<= ~a12~0 80) (= ~a24~0 1) (= 7 ~a21~0) (= |ULTIMATE.start_calculate_output_~input#1| 1) (<= 12 ~a12~0) (= |ULTIMATE.start_calculate_output_#in~input#1| 1) (= 5 ~a15~0)) (and (= |ULTIMATE.start_calculate_output_~input#1| 6) (<= ~a12~0 80) (= ~a24~0 1) (= 7 ~a21~0) (<= 12 ~a12~0) (= 5 ~a15~0) (= |ULTIMATE.start_calculate_output_#in~input#1| 6) (= 6 |ULTIMATE.start_main_~input~0#1|)) (and (= |ULTIMATE.start_main_~input~0#1| 4) (<= ~a12~0 80) (= ~a24~0 1) (= 7 ~a21~0) (<= 12 ~a12~0) (= 5 ~a15~0) (= |ULTIMATE.start_calculate_output_~input#1| 4) (= |ULTIMATE.start_calculate_output_#in~input#1| 4)) (and (= 5 |ULTIMATE.start_main_~input~0#1|) (<= ~a12~0 80) (= ~a24~0 1) (= 5 |ULTIMATE.start_calculate_output_#in~input#1|) (= 7 ~a21~0) (<= 12 ~a12~0) (= 5 ~a15~0) (= |ULTIMATE.start_calculate_output_~input#1| 5)) (and (<= ~a12~0 80) (= |ULTIMATE.start_calculate_output_~input#1| 2) (= ~a24~0 1) (= 7 ~a21~0) (<= 12 ~a12~0) (= 5 ~a15~0) (= 2 |ULTIMATE.start_calculate_output_#in~input#1|) (= 2 |ULTIMATE.start_main_~input~0#1|)))' at error location [2023-12-02 20:22:37,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:22:37,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:22:37,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-12-02 20:22:37,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883461142] [2023-12-02 20:22:37,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:22:37,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 20:22:37,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:22:37,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 20:22:37,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-02 20:22:37,331 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2023-12-02 20:22:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:22:37,566 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2023-12-02 20:22:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:22:37,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) Word has length 9 [2023-12-02 20:22:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:22:37,568 INFO L225 Difference]: With dead ends: 25 [2023-12-02 20:22:37,568 INFO L226 Difference]: Without dead ends: 23 [2023-12-02 20:22:37,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-12-02 20:22:37,570 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:22:37,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:22:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-02 20:22:37,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-12-02 20:22:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 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) [2023-12-02 20:22:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-12-02 20:22:37,575 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 9 [2023-12-02 20:22:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:22:37,576 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-12-02 20:22:37,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2023-12-02 20:22:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-12-02 20:22:37,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 20:22:37,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:22:37,577 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1] [2023-12-02 20:22:37,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 20:22:37,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:22:37,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:22:37,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:22:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash -702772261, now seen corresponding path program 2 times [2023-12-02 20:22:37,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:22:37,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963662375] [2023-12-02 20:22:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:22:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:22:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:25:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:25:11,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:25:11,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963662375] [2023-12-02 20:25:11,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963662375] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:25:11,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981312769] [2023-12-02 20:25:11,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:25:11,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:25:11,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:25:11,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:25:11,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bca5cecc-d86b-4eda-9f35-2752fecf5dd2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 20:25:13,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 20:25:13,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:25:13,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 20:25:13,516 INFO L285 TraceCheckSpWp]: Computing forward predicates...