./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --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 0209a5ecd1f90a7dc207e0462366045d25daa538d59f8499c5199765a86166a3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:00:54,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:00:54,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:00:54,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:00:54,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:00:54,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:00:54,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:00:54,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:00:54,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:00:54,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:00:54,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:00:54,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:00:54,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:00:54,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:00:54,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:00:54,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:00:54,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:00:54,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:00:54,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:00:54,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:00:54,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:00:54,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:00:54,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:00:54,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:00:54,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:00:54,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:00:54,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:00:54,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:00:54,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:00:54,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:00:54,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:00:54,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:00:54,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:00:54,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:00:54,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:00:54,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:00:54,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:00:54,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:00:54,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:00:54,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:00:54,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:00:54,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:00:54,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:00:54,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:00:54,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:00:54,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:00:54,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:00:54,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:00:54,883 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:00:54,883 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:00:54,883 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:00:54,883 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:00:54,883 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:00:54,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:00:54,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:00:54,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:00:54,884 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:00:54,884 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:00:54,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:00:54,884 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:00:54,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:00:54,884 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:00:54,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:00:54,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:00:54,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:00:54,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:00:54,886 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:00:54,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:00:54,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:00:54,886 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:00:54,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:00:54,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:00:54,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:00:54,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0209a5ecd1f90a7dc207e0462366045d25daa538d59f8499c5199765a86166a3 [2022-12-14 11:00:55,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:00:55,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:00:55,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:00:55,077 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:00:55,078 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:00:55,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i [2022-12-14 11:00:57,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:00:57,836 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:00:57,836 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i [2022-12-14 11:00:57,843 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/data/4bffa2d9a/f0eceecc1ab14d37b7803c62ebc6325f/FLAGeb9283588 [2022-12-14 11:00:58,215 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/data/4bffa2d9a/f0eceecc1ab14d37b7803c62ebc6325f [2022-12-14 11:00:58,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:00:58,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:00:58,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:00:58,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:00:58,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:00:58,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d13f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58, skipping insertion in model container [2022-12-14 11:00:58,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:00:58,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:00:58,421 WARN L237 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_9f9c28c7-e411-4173-9229-b6486924d0de/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i[22575,22588] [2022-12-14 11:00:58,424 WARN L237 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_9f9c28c7-e411-4173-9229-b6486924d0de/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i[22647,22660] [2022-12-14 11:00:58,425 WARN L237 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_9f9c28c7-e411-4173-9229-b6486924d0de/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i[22815,22828] [2022-12-14 11:00:58,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:00:58,435 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:00:58,460 WARN L237 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_9f9c28c7-e411-4173-9229-b6486924d0de/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i[22575,22588] [2022-12-14 11:00:58,460 WARN L237 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_9f9c28c7-e411-4173-9229-b6486924d0de/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i[22647,22660] [2022-12-14 11:00:58,461 WARN L237 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_9f9c28c7-e411-4173-9229-b6486924d0de/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i[22815,22828] [2022-12-14 11:00:58,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:00:58,479 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:00:58,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58 WrapperNode [2022-12-14 11:00:58,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:00:58,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:00:58,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:00:58,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:00:58,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,508 INFO L138 Inliner]: procedures = 119, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 119 [2022-12-14 11:00:58,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:00:58,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:00:58,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:00:58,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:00:58,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,528 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:00:58,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:00:58,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:00:58,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:00:58,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (1/1) ... [2022-12-14 11:00:58,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:00:58,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:00:58,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:00:58,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:00:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 11:00:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 11:00:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 11:00:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:00:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 11:00:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 11:00:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:00:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:00:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:00:58,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:00:58,678 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:00:58,680 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:00:58,918 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:00:59,000 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:00:59,001 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 11:00:59,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:00:59 BoogieIcfgContainer [2022-12-14 11:00:59,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:00:59,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:00:59,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:00:59,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:00:59,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:00:58" (1/3) ... [2022-12-14 11:00:59,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479a4aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:00:59, skipping insertion in model container [2022-12-14 11:00:59,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:00:58" (2/3) ... [2022-12-14 11:00:59,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479a4aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:00:59, skipping insertion in model container [2022-12-14 11:00:59,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:00:59" (3/3) ... [2022-12-14 11:00:59,012 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-2.i [2022-12-14 11:00:59,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:00:59,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-12-14 11:00:59,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:00:59,074 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=LoopsAndPotentialCycles, 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;@36d0913, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:00:59,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-14 11:00:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 21 states have internal predecessors, (34), 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) [2022-12-14 11:00:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:00:59,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:00:59,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:00:59,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:00:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:00:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash 137298967, now seen corresponding path program 1 times [2022-12-14 11:00:59,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:00:59,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118927883] [2022-12-14 11:00:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:00:59,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:00:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:00:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:59,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:00:59,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118927883] [2022-12-14 11:00:59,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118927883] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:00:59,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:00:59,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:00:59,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759237562] [2022-12-14 11:00:59,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:00:59,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 11:00:59,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:00:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 11:00:59,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:00:59,275 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 21 states have internal predecessors, (34), 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 2 states, 2 states have (on average 2.5) 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) [2022-12-14 11:00:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:00:59,375 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2022-12-14 11:00:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 11:00:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) 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 [2022-12-14 11:00:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:00:59,384 INFO L225 Difference]: With dead ends: 41 [2022-12-14 11:00:59,384 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 11:00:59,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:00:59,389 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:00:59,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:00:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 11:00:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 11:00:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 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) [2022-12-14 11:00:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-12-14 11:00:59,414 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 5 [2022-12-14 11:00:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:00:59,414 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-12-14 11:00:59,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) 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) [2022-12-14 11:00:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-12-14 11:00:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:00:59,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:00:59,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:00:59,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:00:59,416 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:00:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:00:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash -51068352, now seen corresponding path program 1 times [2022-12-14 11:00:59,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:00:59,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85803737] [2022-12-14 11:00:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:00:59,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:00:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:00:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:59,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:00:59,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85803737] [2022-12-14 11:00:59,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85803737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:00:59,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:00:59,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:00:59,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331208332] [2022-12-14 11:00:59,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:00:59,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:00:59,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:00:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:00:59,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:00:59,526 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 11:00:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:00:59,580 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-12-14 11:00:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:00:59,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 [2022-12-14 11:00:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:00:59,582 INFO L225 Difference]: With dead ends: 21 [2022-12-14 11:00:59,582 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 11:00:59,582 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 [2022-12-14 11:00:59,583 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:00:59,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:00:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 11:00:59,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-12-14 11:00:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 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) [2022-12-14 11:00:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-12-14 11:00:59,588 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 6 [2022-12-14 11:00:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:00:59,589 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-12-14 11:00:59,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 11:00:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-12-14 11:00:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 11:00:59,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:00:59,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:00:59,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:00:59,590 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:00:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:00:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash -954906231, now seen corresponding path program 1 times [2022-12-14 11:00:59,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:00:59,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876067167] [2022-12-14 11:00:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:00:59,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:00:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:00:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:59,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:00:59,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876067167] [2022-12-14 11:00:59,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876067167] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:00:59,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:00:59,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:00:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740979350] [2022-12-14 11:00:59,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:00:59,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:00:59,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:00:59,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:00:59,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:00:59,749 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-12-14 11:01:00,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:00,267 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-12-14 11:01:00,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:01:00,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) Word has length 9 [2022-12-14 11:01:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:01:00,269 INFO L225 Difference]: With dead ends: 42 [2022-12-14 11:01:00,269 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 11:01:00,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:01:00,270 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:01:00,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:01:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 11:01:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2022-12-14 11:01:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 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) [2022-12-14 11:01:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-12-14 11:01:00,279 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 9 [2022-12-14 11:01:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:00,279 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-12-14 11:01:00,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-12-14 11:01:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-12-14 11:01:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:01:00,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:00,280 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:00,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:01:00,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:01:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:00,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1372755162, now seen corresponding path program 1 times [2022-12-14 11:01:00,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:01:00,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374312201] [2022-12-14 11:01:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:00,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:01:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:18,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:01:18,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374312201] [2022-12-14 11:01:18,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374312201] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:01:18,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557541023] [2022-12-14 11:01:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:18,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:18,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:18,767 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:18,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f9c28c7-e411-4173-9229-b6486924d0de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:01:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:19,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-14 11:01:19,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:19,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 11:01:19,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:01:19,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:19,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:19,409 INFO L321 Elim1Store]: treesize reduction 48, result has 48.4 percent of original size [2022-12-14 11:01:19,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 449 treesize of output 512 [2022-12-14 11:01:19,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 624 treesize of output 560 [2022-12-14 11:01:19,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 704 treesize of output 670 [2022-12-14 11:01:19,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:19,629 INFO L321 Elim1Store]: treesize reduction 56, result has 48.6 percent of original size [2022-12-14 11:01:19,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 525 treesize of output 653 [2022-12-14 11:01:19,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 713 treesize of output 658 [2022-12-14 11:01:19,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 728 treesize of output 700 [2022-12-14 11:01:19,894 INFO L321 Elim1Store]: treesize reduction 83, result has 41.1 percent of original size [2022-12-14 11:01:19,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 537 treesize of output 602 [2022-12-14 11:01:19,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 509 treesize of output 507 [2022-12-14 11:01:19,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 507 treesize of output 505 [2022-12-14 11:01:20,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 505 treesize of output 503 [2022-12-14 11:01:20,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:20,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 513 treesize of output 507 [2022-12-14 11:01:20,176 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 11:01:20,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 487 treesize of output 517 [2022-12-14 11:01:20,292 INFO L321 Elim1Store]: treesize reduction 942, result has 0.5 percent of original size [2022-12-14 11:01:20,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 484 treesize of output 654 [2022-12-14 11:01:20,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 129 [2022-12-14 11:01:20,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 97 [2022-12-14 11:01:22,100 INFO L190 IndexEqualityManager]: detected not equals via solver