./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label27.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_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/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_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label27.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/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_ffdf6701-ee25-48d0-8549-a0f2b63f7337/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 37a936c68c2366e8e771de8327d485af323f29b99aee8e4d5b84781c604b5939 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:06:14,789 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:06:14,853 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:06:14,858 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:06:14,859 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:06:14,883 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:06:14,884 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:06:14,884 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:06:14,885 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:06:14,886 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:06:14,886 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:06:14,887 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:06:14,887 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:06:14,888 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:06:14,888 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:06:14,889 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:06:14,889 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:06:14,890 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:06:14,890 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:06:14,891 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:06:14,891 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:06:14,892 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:06:14,893 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:06:14,894 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:06:14,894 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:06:14,894 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:06:14,895 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:06:14,895 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:06:14,896 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:06:14,896 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:06:14,896 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:06:14,897 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:06:14,897 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:06:14,897 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:06:14,898 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:06:14,898 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:06:14,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:06:14,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:06:14,898 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:06:14,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:06:14,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:06:14,899 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:06:14,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:06:14,899 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:06:14,900 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:06:14,900 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:06:14,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:06:14,900 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_ffdf6701-ee25-48d0-8549-a0f2b63f7337/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37a936c68c2366e8e771de8327d485af323f29b99aee8e4d5b84781c604b5939 [2023-12-02 19:06:15,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:06:15,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:06:15,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:06:15,138 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:06:15,138 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:06:15,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/eca-rers2012/Problem14_label27.c [2023-12-02 19:06:17,987 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:06:18,245 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:06:18,245 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/sv-benchmarks/c/eca-rers2012/Problem14_label27.c [2023-12-02 19:06:18,260 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/data/7a461a944/e2c301f7bec84173ba131353104e96b3/FLAG8afa83408 [2023-12-02 19:06:18,274 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/data/7a461a944/e2c301f7bec84173ba131353104e96b3 [2023-12-02 19:06:18,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:06:18,278 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:06:18,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:06:18,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:06:18,285 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:06:18,285 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:18,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f8d7fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18, skipping insertion in model container [2023-12-02 19:06:18,287 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:18,352 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:06:18,509 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_ffdf6701-ee25-48d0-8549-a0f2b63f7337/sv-benchmarks/c/eca-rers2012/Problem14_label27.c[3158,3171] [2023-12-02 19:06:18,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:06:18,681 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:06:18,701 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_ffdf6701-ee25-48d0-8549-a0f2b63f7337/sv-benchmarks/c/eca-rers2012/Problem14_label27.c[3158,3171] [2023-12-02 19:06:18,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:06:18,812 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:06:18,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18 WrapperNode [2023-12-02 19:06:18,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:06:18,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:06:18,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:06:18,814 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:06:18,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:18,845 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:18,911 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2023-12-02 19:06:18,911 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:06:18,912 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:06:18,912 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:06:18,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:06:18,922 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:18,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:18,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:18,930 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:18,959 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:18,969 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:18,974 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:19,007 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:19,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:06:19,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:06:19,016 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:06:19,016 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:06:19,017 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (1/1) ... [2023-12-02 19:06:19,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:06:19,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:06:19,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:06:19,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:06:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:06:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:06:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:06:19,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:06:19,193 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:06:19,195 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:06:20,314 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:06:23,844 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:06:23,844 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 19:06:23,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:06:23 BoogieIcfgContainer [2023-12-02 19:06:23,845 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:06:23,848 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:06:23,848 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:06:23,851 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:06:23,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:06:18" (1/3) ... [2023-12-02 19:06:23,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204a9c73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:06:23, skipping insertion in model container [2023-12-02 19:06:23,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:06:18" (2/3) ... [2023-12-02 19:06:23,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204a9c73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:06:23, skipping insertion in model container [2023-12-02 19:06:23,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:06:23" (3/3) ... [2023-12-02 19:06:23,854 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label27.c [2023-12-02 19:06:23,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:06:23,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:06:23,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:06:23,919 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;@109c3a81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:06:23,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:06:23,922 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 19:06:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 19:06:23,926 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:06:23,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 19:06:23,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:06:23,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:06:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1058091523, now seen corresponding path program 1 times [2023-12-02 19:06:23,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:06:23,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222573123] [2023-12-02 19:06:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:06:23,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:06:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:06:24,141 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 19:06:24,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:06:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222573123] [2023-12-02 19:06:24,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222573123] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:06:24,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:06:24,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:06:24,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198378958] [2023-12-02 19:06:24,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:06:24,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:06:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:06:24,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:06:24,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:06:24,180 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 19:06:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:06:24,265 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2023-12-02 19:06:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:06:24,267 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 19:06:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:06:24,274 INFO L225 Difference]: With dead ends: 23 [2023-12-02 19:06:24,275 INFO L226 Difference]: Without dead ends: 11 [2023-12-02 19:06:24,277 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 19:06:24,281 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 19:06:24,282 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 19:06:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-02 19:06:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2023-12-02 19:06:24,309 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 19:06:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-12-02 19:06:24,311 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2023-12-02 19:06:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:06:24,311 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-12-02 19:06:24,312 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 19:06:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-12-02 19:06:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 19:06:24,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:06:24,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-12-02 19:06:24,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:06:24,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:06:24,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:06:24,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1591287345, now seen corresponding path program 1 times [2023-12-02 19:06:24,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:06:24,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380132353] [2023-12-02 19:06:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:06:24,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:06:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:06:43,180 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 19:06:43,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:06:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380132353] [2023-12-02 19:06:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380132353] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:06:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540557734] [2023-12-02 19:06:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:06:43,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:06:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:06:43,186 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:06:43,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:06:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:06:43,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 19:06:43,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:06:45,648 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 19:06:45,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:07:09,951 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 19:07:09,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540557734] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:07:09,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [34117038] [2023-12-02 19:07:09,971 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 19:07:09,971 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:07:09,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:07:09,980 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:07:09,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:07:11,365 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2023-12-02 19:07:11,672 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16260 conjunctions. This might take some time... [2023-12-02 19:07:13,372 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 576 conjunctions. [2023-12-02 19:07:13,393 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2023-12-02 19:07:13,665 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16260 conjunctions. This might take some time... [2023-12-02 19:07:15,239 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 576 conjunctions. [2023-12-02 19:11:38,438 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2023-12-02 19:11:38,574 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7530 conjunctions. This might take some time... [2023-12-02 19:11:38,865 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2023-12-02 19:11:38,868 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2023-12-02 19:11:38,963 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7530 conjunctions. This might take some time... [2023-12-02 19:11:39,263 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2023-12-02 19:17:52,564 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2023-12-02 19:17:52,670 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7530 conjunctions. This might take some time... [2023-12-02 19:17:52,978 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2023-12-02 19:17:52,980 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2023-12-02 19:17:53,086 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7530 conjunctions. This might take some time... [2023-12-02 19:17:53,387 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2023-12-02 19:17:53,775 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2023-12-02 19:17:53,870 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7530 conjunctions. This might take some time... [2023-12-02 19:17:54,158 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2023-12-02 19:17:55,037 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2023-12-02 19:17:55,133 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7530 conjunctions. This might take some time... [2023-12-02 19:17:55,422 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjunctions. [2023-12-02 19:17:55,591 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:17:56,724 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '109#(or (and (<= ~a12~0 11) (= |ULTIMATE.start_main_~input~0#1| 4) (= ~a24~0 1) (= ~a21~0 9) (= |ULTIMATE.start_calculate_output_~input#1| 4) (= |ULTIMATE.start_calculate_output_#in~input#1| 4) (<= 0 (+ ~a12~0 42)) (= ~a15~0 6)) (and (<= ~a12~0 11) (= |ULTIMATE.start_calculate_output_~input#1| 2) (= ~a24~0 1) (= ~a21~0 9) (= 2 |ULTIMATE.start_calculate_output_#in~input#1|) (<= 0 (+ ~a12~0 42)) (= ~a15~0 6) (= 2 |ULTIMATE.start_main_~input~0#1|)) (and (<= ~a12~0 11) (= ~a24~0 1) (= ~a21~0 9) (= 3 |ULTIMATE.start_calculate_output_#in~input#1|) (= 3 |ULTIMATE.start_main_~input~0#1|) (= |ULTIMATE.start_calculate_output_~input#1| 3) (<= 0 (+ ~a12~0 42)) (= ~a15~0 6)) (and (<= ~a12~0 11) (= 5 |ULTIMATE.start_main_~input~0#1|) (= ~a24~0 1) (= 5 |ULTIMATE.start_calculate_output_#in~input#1|) (= ~a21~0 9) (<= 0 (+ ~a12~0 42)) (= ~a15~0 6) (= |ULTIMATE.start_calculate_output_~input#1| 5)) (and (<= ~a12~0 11) (= |ULTIMATE.start_main_~input~0#1| 1) (= ~a24~0 1) (= |ULTIMATE.start_calculate_output_~input#1| 1) (= ~a21~0 9) (= |ULTIMATE.start_calculate_output_#in~input#1| 1) (<= 0 (+ ~a12~0 42)) (= ~a15~0 6)) (and (<= ~a12~0 11) (= |ULTIMATE.start_calculate_output_~input#1| 6) (= ~a24~0 1) (= ~a21~0 9) (= |ULTIMATE.start_calculate_output_#in~input#1| 6) (<= 0 (+ ~a12~0 42)) (= ~a15~0 6) (= 6 |ULTIMATE.start_main_~input~0#1|)))' at error location [2023-12-02 19:17:56,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:17:56,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:17:56,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-12-02 19:17:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747677721] [2023-12-02 19:17:56,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:17:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:17:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:17:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:17:56,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:17:56,728 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 19:17:56,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:17:56,838 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2023-12-02 19:17:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:17:56,839 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 19:17:56,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:17:56,839 INFO L225 Difference]: With dead ends: 17 [2023-12-02 19:17:56,839 INFO L226 Difference]: Without dead ends: 15 [2023-12-02 19:17:56,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-12-02 19:17:56,842 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:17:56,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:17:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-02 19:17:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-12-02 19:17:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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 19:17:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-12-02 19:17:56,846 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2023-12-02 19:17:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:17:56,847 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-12-02 19:17:56,847 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 19:17:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-12-02 19:17:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 19:17:56,847 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:17:56,848 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2023-12-02 19:17:56,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:17:57,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:17:57,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:17:57,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:17:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1129530207, now seen corresponding path program 2 times [2023-12-02 19:17:57,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:17:57,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643899234] [2023-12-02 19:17:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:17:57,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:17:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:18:31,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:18:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643899234] [2023-12-02 19:18:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643899234] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:18:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859446551] [2023-12-02 19:18:31,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:18:31,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:31,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:18:31,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:18:31,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffdf6701-ee25-48d0-8549-a0f2b63f7337/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:18:31,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:18:31,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:18:31,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 19:18:31,640 INFO L285 TraceCheckSpWp]: Computing forward predicates...