./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02.i --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_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/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_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/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_480b95a8-7416-4535-bd83-8d97d3ebad72/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 29d100da65e2ae9d5c43d48b49216d155078158e341858baee0b08b697e15c8e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:07:25,041 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:07:25,121 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:07:25,126 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:07:25,126 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:07:25,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:07:25,156 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:07:25,157 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:07:25,157 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:07:25,158 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:07:25,158 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:07:25,159 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:07:25,159 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:07:25,160 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:07:25,160 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:07:25,161 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:07:25,161 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:07:25,162 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:07:25,162 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:07:25,163 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:07:25,163 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:07:25,164 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:07:25,165 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:07:25,165 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:07:25,166 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:07:25,166 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:07:25,166 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:07:25,167 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:07:25,167 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:07:25,168 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:07:25,168 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:07:25,168 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:07:25,169 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:07:25,169 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:07:25,170 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:07:25,170 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:07:25,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:07:25,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:07:25,171 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:07:25,171 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:07:25,171 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:07:25,172 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:07:25,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:07:25,172 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:07:25,172 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:07:25,172 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:07:25,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:07:25,173 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_480b95a8-7416-4535-bd83-8d97d3ebad72/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29d100da65e2ae9d5c43d48b49216d155078158e341858baee0b08b697e15c8e [2023-12-02 17:07:25,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:07:25,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:07:25,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:07:25,443 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:07:25,444 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:07:25,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/loops/sum01_bug02.i [2023-12-02 17:07:28,195 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:07:28,379 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:07:28,380 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/sv-benchmarks/c/loops/sum01_bug02.i [2023-12-02 17:07:28,387 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/data/b2a5cfcec/57c12ee923a44a9f8b79ac506e051c4d/FLAGe79e77b8d [2023-12-02 17:07:28,402 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/data/b2a5cfcec/57c12ee923a44a9f8b79ac506e051c4d [2023-12-02 17:07:28,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:07:28,406 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:07:28,407 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:07:28,408 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:07:28,413 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:07:28,414 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@659a609e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28, skipping insertion in model container [2023-12-02 17:07:28,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,436 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:07:28,585 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_480b95a8-7416-4535-bd83-8d97d3ebad72/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2023-12-02 17:07:28,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:07:28,607 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:07:28,620 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_480b95a8-7416-4535-bd83-8d97d3ebad72/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2023-12-02 17:07:28,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:07:28,639 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:07:28,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28 WrapperNode [2023-12-02 17:07:28,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:07:28,640 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:07:28,641 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:07:28,641 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:07:28,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,660 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,697 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 37 [2023-12-02 17:07:28,697 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:07:28,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:07:28,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:07:28,698 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:07:28,707 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,708 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,708 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,711 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,714 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,715 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,716 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,718 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:07:28,719 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:07:28,719 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:07:28,719 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:07:28,720 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (1/1) ... [2023-12-02 17:07:28,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:07:28,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:07:28,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:07:28,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:07:28,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:07:28,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:07:28,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:07:28,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:07:28,856 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:07:28,858 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:07:28,965 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:07:29,010 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:07:29,010 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 17:07:29,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:29 BoogieIcfgContainer [2023-12-02 17:07:29,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:07:29,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:07:29,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:07:29,019 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:07:29,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:07:28" (1/3) ... [2023-12-02 17:07:29,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e18c9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:07:29, skipping insertion in model container [2023-12-02 17:07:29,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:28" (2/3) ... [2023-12-02 17:07:29,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e18c9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:07:29, skipping insertion in model container [2023-12-02 17:07:29,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:29" (3/3) ... [2023-12-02 17:07:29,022 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2023-12-02 17:07:29,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:07:29,044 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:07:29,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:07:29,103 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;@1f852ce6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:07:29,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:07:29,108 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 17:07:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 17:07:29,115 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:07:29,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 17:07:29,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:07:29,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:07:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash 69521656, now seen corresponding path program 1 times [2023-12-02 17:07:29,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:07:29,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49927482] [2023-12-02 17:07:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:29,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:07:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:07:29,431 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 17:07:29,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:07:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49927482] [2023-12-02 17:07:29,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49927482] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:07:29,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:07:29,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:07:29,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717659389] [2023-12-02 17:07:29,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:07:29,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:07:29,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:07:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:07:29,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:07:29,473 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 4 states, 4 states have (on average 1.25) internal successors, (5), 3 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 17:07:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:07:29,530 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2023-12-02 17:07:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:07:29,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 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 17:07:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:07:29,541 INFO L225 Difference]: With dead ends: 18 [2023-12-02 17:07:29,541 INFO L226 Difference]: Without dead ends: 7 [2023-12-02 17:07:29,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:07:29,548 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:07:29,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:07:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-12-02 17:07:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-12-02 17:07:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 17:07:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-12-02 17:07:29,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-12-02 17:07:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:07:29,575 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-12-02 17:07:29,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 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 17:07:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-12-02 17:07:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 17:07:29,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:07:29,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 17:07:29,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:07:29,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:07:29,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:07:29,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2139837312, now seen corresponding path program 1 times [2023-12-02 17:07:29,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:07:29,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670157505] [2023-12-02 17:07:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:29,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:07:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:07:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:07:29,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:07:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670157505] [2023-12-02 17:07:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670157505] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:07:29,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449068470] [2023-12-02 17:07:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:29,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:29,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:07:29,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:07:29,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:07:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:07:29,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:07:29,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:07:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:07:29,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:07:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:07:30,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449068470] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:07:30,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443862809] [2023-12-02 17:07:30,189 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 17:07:30,189 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:07:30,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:07:30,195 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:07:30,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:07:30,344 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:07:30,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88#(and (<= |ULTIMATE.start_main_~j~0#1| 10) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (not (= (* 2 |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~sn~0#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~sn~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~n~0#1| 1) |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_~sn~0#1| 0)))' at error location [2023-12-02 17:07:30,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:07:30,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:07:30,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-02 17:07:30,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482164826] [2023-12-02 17:07:30,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:07:30,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:07:30,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:07:30,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:07:30,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:07:30,545 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 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 17:07:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:07:30,672 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2023-12-02 17:07:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:07:30,673 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 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 6 [2023-12-02 17:07:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:07:30,673 INFO L225 Difference]: With dead ends: 13 [2023-12-02 17:07:30,673 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 17:07:30,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:07:30,676 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:07:30,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:07:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 17:07:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-12-02 17:07:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 17:07:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-12-02 17:07:30,681 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2023-12-02 17:07:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:07:30,681 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-12-02 17:07:30,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 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 17:07:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-12-02 17:07:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 17:07:30,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:07:30,682 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2023-12-02 17:07:30,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:07:30,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 17:07:30,883 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:07:30,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:07:30,884 INFO L85 PathProgramCache]: Analyzing trace with hash 904354688, now seen corresponding path program 2 times [2023-12-02 17:07:30,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:07:30,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60907191] [2023-12-02 17:07:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:30,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:07:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:07:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:07:31,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:07:31,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60907191] [2023-12-02 17:07:31,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60907191] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:07:31,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211543065] [2023-12-02 17:07:31,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:07:31,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:31,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:07:31,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:07:31,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:07:31,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:07:31,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:07:31,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 17:07:31,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:07:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:07:31,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:07:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:07:31,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211543065] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:07:31,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855061786] [2023-12-02 17:07:31,946 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 17:07:31,946 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:07:31,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:07:31,947 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:07:31,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:07:32,035 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:07:32,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '187#(and (<= |ULTIMATE.start_main_~j~0#1| 10) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (not (= (* 2 |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~sn~0#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~sn~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~n~0#1| 1) |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_~sn~0#1| 0)))' at error location [2023-12-02 17:07:32,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:07:32,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:07:32,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-12-02 17:07:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066250956] [2023-12-02 17:07:32,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:07:32,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:07:32,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:07:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:07:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:07:32,236 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 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 17:07:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:07:32,504 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-12-02 17:07:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:07:32,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 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 8 [2023-12-02 17:07:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:07:32,505 INFO L225 Difference]: With dead ends: 17 [2023-12-02 17:07:32,505 INFO L226 Difference]: Without dead ends: 12 [2023-12-02 17:07:32,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:07:32,507 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:07:32,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:07:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-12-02 17:07:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-12-02 17:07:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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 17:07:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-12-02 17:07:32,513 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2023-12-02 17:07:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:07:32,513 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-12-02 17:07:32,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 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 17:07:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-12-02 17:07:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 17:07:32,514 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:07:32,514 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2023-12-02 17:07:32,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:07:32,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:32,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:07:32,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:07:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash -740400136, now seen corresponding path program 3 times [2023-12-02 17:07:32,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:07:32,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825462456] [2023-12-02 17:07:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:32,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:07:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 17:07:32,737 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 17:07:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 17:07:32,765 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 17:07:32,765 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 17:07:32,766 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 17:07:32,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:07:32,772 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-12-02 17:07:32,776 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 17:07:32,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 05:07:32 BoogieIcfgContainer [2023-12-02 17:07:32,797 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 17:07:32,798 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 17:07:32,798 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 17:07:32,798 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 17:07:32,799 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:29" (3/4) ... [2023-12-02 17:07:32,800 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 17:07:32,841 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480b95a8-7416-4535-bd83-8d97d3ebad72/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 17:07:32,842 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 17:07:32,842 INFO L158 Benchmark]: Toolchain (without parser) took 4436.11ms. Allocated memory was 174.1MB in the beginning and 209.7MB in the end (delta: 35.7MB). Free memory was 144.3MB in the beginning and 93.1MB in the end (delta: 51.2MB). Peak memory consumption was 87.7MB. Max. memory is 16.1GB. [2023-12-02 17:07:32,843 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory is still 92.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:07:32,843 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.13ms. Allocated memory is still 174.1MB. Free memory was 144.3MB in the beginning and 134.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 17:07:32,844 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.64ms. Allocated memory is still 174.1MB. Free memory was 134.0MB in the beginning and 143.9MB in the end (delta: -9.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:07:32,844 INFO L158 Benchmark]: Boogie Preprocessor took 20.09ms. Allocated memory is still 174.1MB. Free memory was 143.9MB in the beginning and 142.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:07:32,844 INFO L158 Benchmark]: RCFGBuilder took 293.51ms. Allocated memory is still 174.1MB. Free memory was 142.8MB in the beginning and 131.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 17:07:32,845 INFO L158 Benchmark]: TraceAbstraction took 3782.19ms. Allocated memory was 174.1MB in the beginning and 209.7MB in the end (delta: 35.7MB). Free memory was 130.3MB in the beginning and 95.2MB in the end (delta: 35.1MB). Peak memory consumption was 72.6MB. Max. memory is 16.1GB. [2023-12-02 17:07:32,845 INFO L158 Benchmark]: Witness Printer took 43.77ms. Allocated memory is still 209.7MB. Free memory was 95.2MB in the beginning and 93.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:07:32,847 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory is still 92.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.13ms. Allocated memory is still 174.1MB. Free memory was 144.3MB in the beginning and 134.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.64ms. Allocated memory is still 174.1MB. Free memory was 134.0MB in the beginning and 143.9MB in the end (delta: -9.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.09ms. Allocated memory is still 174.1MB. Free memory was 143.9MB in the beginning and 142.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 293.51ms. Allocated memory is still 174.1MB. Free memory was 142.8MB in the beginning and 131.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3782.19ms. Allocated memory was 174.1MB in the beginning and 209.7MB in the end (delta: 35.7MB). Free memory was 130.3MB in the beginning and 95.2MB in the end (delta: 35.1MB). Peak memory consumption was 72.6MB. Max. memory is 16.1GB. * Witness Printer took 43.77ms. Allocated memory is still 209.7MB. Free memory was 95.2MB in the beginning and 93.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; VAL [j=10, n=0, n=6] [L24] COND FALSE !(n==2147483647) [L27] i=1 VAL [i=1, j=10, n=0, n=6] [L27] COND TRUE i<=n [L28] COND TRUE i