./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/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_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/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_fd798773-1ded-48ae-ac0d-868cf749ea2b/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 7c71ebd98a3b6e7de0397eeeb86fda8d96b2d4c8ea0b8e1766ce392ff80613de --- 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 05:25:14,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:25:14,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:25:14,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:25:14,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:25:14,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:25:14,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:25:14,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:25:14,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:25:14,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:25:14,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:25:14,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:25:14,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:25:14,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:25:14,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:25:14,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:25:14,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:25:14,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:25:14,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:25:14,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:25:14,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:25:14,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:25:14,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:25:14,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:25:14,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:25:14,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:25:14,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:25:14,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:25:14,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:25:14,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:25:14,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:25:14,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:25:14,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:25:14,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:25:14,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:25:14,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:25:14,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:25:14,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:25:14,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:25:14,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:25:14,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:25:14,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:25:14,977 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:25:14,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:25:14,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:25:14,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:25:14,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:25:14,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:25:14,978 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:25:14,979 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:25:14,979 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:25:14,979 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:25:14,979 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:25:14,979 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:25:14,980 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:25:14,980 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:25:14,980 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:25:14,980 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:25:14,980 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:25:14,980 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:25:14,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:25:14,981 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:25:14,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:25:14,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:25:14,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:25:14,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:25:14,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:25:14,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:25:14,982 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:25:14,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:25:14,983 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:25:14,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:25:14,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:25:14,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:25:14,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:25:14,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:25:14,984 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:25:14,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:25:14,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:25:14,984 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:25:14,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:25:14,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:25:14,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:25:14,985 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_fd798773-1ded-48ae-ac0d-868cf749ea2b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c71ebd98a3b6e7de0397eeeb86fda8d96b2d4c8ea0b8e1766ce392ff80613de [2022-12-14 05:25:15,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:25:15,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:25:15,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:25:15,188 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:25:15,189 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:25:15,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops/string-1.i [2022-12-14 05:25:17,839 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:25:17,993 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:25:17,993 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/sv-benchmarks/c/loops/string-1.i [2022-12-14 05:25:17,997 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/data/8c6056c7a/9f224ef1e26244f1ac80a2cb51f0ec33/FLAG6be782818 [2022-12-14 05:25:18,007 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/data/8c6056c7a/9f224ef1e26244f1ac80a2cb51f0ec33 [2022-12-14 05:25:18,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:25:18,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:25:18,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:25:18,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:25:18,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:25:18,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c75ce05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18, skipping insertion in model container [2022-12-14 05:25:18,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:25:18,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:25:18,149 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_fd798773-1ded-48ae-ac0d-868cf749ea2b/sv-benchmarks/c/loops/string-1.i[896,909] [2022-12-14 05:25:18,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:25:18,168 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:25:18,178 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_fd798773-1ded-48ae-ac0d-868cf749ea2b/sv-benchmarks/c/loops/string-1.i[896,909] [2022-12-14 05:25:18,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:25:18,196 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:25:18,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18 WrapperNode [2022-12-14 05:25:18,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:25:18,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:25:18,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:25:18,197 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:25:18,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,223 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2022-12-14 05:25:18,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:25:18,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:25:18,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:25:18,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:25:18,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,240 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:25:18,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:25:18,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:25:18,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:25:18,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (1/1) ... [2022-12-14 05:25:18,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:25:18,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:25:18,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:25:18,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:25:18,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:25:18,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:25:18,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 05:25:18,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 05:25:18,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:25:18,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:25:18,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 05:25:18,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 05:25:18,353 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:25:18,354 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:25:18,478 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:25:18,512 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:25:18,512 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 05:25:18,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:25:18 BoogieIcfgContainer [2022-12-14 05:25:18,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:25:18,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:25:18,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:25:18,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:25:18,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:25:18" (1/3) ... [2022-12-14 05:25:18,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9480bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:25:18, skipping insertion in model container [2022-12-14 05:25:18,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:25:18" (2/3) ... [2022-12-14 05:25:18,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9480bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:25:18, skipping insertion in model container [2022-12-14 05:25:18,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:25:18" (3/3) ... [2022-12-14 05:25:18,522 INFO L112 eAbstractionObserver]: Analyzing ICFG string-1.i [2022-12-14 05:25:18,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:25:18,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:25:18,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:25:18,592 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;@226ebba8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:25:18,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:25:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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 05:25:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:25:18,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:25:18,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:25:18,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:25:18,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:25:18,608 INFO L85 PathProgramCache]: Analyzing trace with hash -431386043, now seen corresponding path program 1 times [2022-12-14 05:25:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:25:18,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100797168] [2022-12-14 05:25:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:18,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:25:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:18,786 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 05:25:18,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:25:18,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100797168] [2022-12-14 05:25:18,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100797168] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:25:18,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:25:18,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:25:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762102215] [2022-12-14 05:25:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:25:18,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:25:18,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:25:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:25:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:25:18,818 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2022-12-14 05:25:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:25:18,860 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2022-12-14 05:25:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:25:18,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) Word has length 12 [2022-12-14 05:25:18,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:25:18,868 INFO L225 Difference]: With dead ends: 43 [2022-12-14 05:25:18,868 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 05:25:18,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:25:18,873 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:25:18,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:25:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 05:25:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2022-12-14 05:25:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 05:25:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 05:25:18,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2022-12-14 05:25:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:25:18,897 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 05:25:18,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2022-12-14 05:25:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 05:25:18,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 05:25:18,898 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:25:18,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:25:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:25:18,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:25:18,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:25:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1062173536, now seen corresponding path program 1 times [2022-12-14 05:25:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:25:18,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015891114] [2022-12-14 05:25:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:18,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:25:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:25:19,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:25:19,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015891114] [2022-12-14 05:25:19,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015891114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:25:19,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169330657] [2022-12-14 05:25:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:19,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:19,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:25:19,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:25:19,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:25:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:25:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:25:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:25:19,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:25:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:25:19,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169330657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:25:19,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1142500359] [2022-12-14 05:25:19,141 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 05:25:19,142 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:25:19,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:25:19,149 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:25:19,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:25:19,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,261 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 05:25:19,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 05:25:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 05:25:19,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 05:25:19,421 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-12-14 05:25:19,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 242 [2022-12-14 05:25:19,495 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 14 treesize of output 10 [2022-12-14 05:25:19,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 05:25:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,583 INFO L321 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2022-12-14 05:25:19,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 84 [2022-12-14 05:25:19,638 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 14 treesize of output 10 [2022-12-14 05:25:19,671 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:25:20,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1142500359] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:25:20,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:25:20,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 17 [2022-12-14 05:25:20,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104711712] [2022-12-14 05:25:20,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:25:20,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:25:20,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:25:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:25:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:25:20,112 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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 05:25:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:25:20,244 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-12-14 05:25:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:25:20,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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 16 [2022-12-14 05:25:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:25:20,246 INFO L225 Difference]: With dead ends: 33 [2022-12-14 05:25:20,246 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 05:25:20,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:25:20,247 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:25:20,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 25 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:25:20,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 05:25:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2022-12-14 05:25:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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 05:25:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-12-14 05:25:20,252 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-12-14 05:25:20,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:25:20,252 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-12-14 05:25:20,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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 05:25:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-12-14 05:25:20,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 05:25:20,253 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:25:20,253 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:25:20,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:25:20,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:20,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:25:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:25:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -96510459, now seen corresponding path program 1 times [2022-12-14 05:25:20,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:25:20,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664062038] [2022-12-14 05:25:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:25:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:25:20,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:25:20,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664062038] [2022-12-14 05:25:20,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664062038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:25:20,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766710921] [2022-12-14 05:25:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:20,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:20,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:25:20,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:25:20,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:25:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:20,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:25:20,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:25:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:25:20,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:25:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:25:20,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766710921] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:25:20,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393862548] [2022-12-14 05:25:20,690 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 05:25:20,690 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:25:20,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:25:20,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:25:20,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:25:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:20,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:20,733 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 05:25:20,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 05:25:20,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:20,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:20,765 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 05:25:20,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 05:25:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:20,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 05:25:20,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:25:20,873 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 05:25:20,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 246 treesize of output 243 [2022-12-14 05:25:20,957 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 14 treesize of output 10 [2022-12-14 05:25:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:20,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 05:25:20,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:21,014 INFO L321 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2022-12-14 05:25:21,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 84 [2022-12-14 05:25:21,048 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 14 treesize of output 10 [2022-12-14 05:25:21,120 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:25:21,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [393862548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:25:21,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:25:21,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 16 [2022-12-14 05:25:21,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705491849] [2022-12-14 05:25:21,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:25:21,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:25:21,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:25:21,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:25:21,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:25:21,447 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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 05:25:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:25:21,636 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-12-14 05:25:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:25:21,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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 18 [2022-12-14 05:25:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:25:21,637 INFO L225 Difference]: With dead ends: 32 [2022-12-14 05:25:21,637 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 05:25:21,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:25:21,637 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:25:21,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 32 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:25:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 05:25:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-12-14 05:25:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 05:25:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-12-14 05:25:21,641 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 18 [2022-12-14 05:25:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:25:21,641 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-12-14 05:25:21,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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 05:25:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-12-14 05:25:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 05:25:21,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:25:21,641 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:25:21,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:25:21,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:21,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:25:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:25:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash 616504091, now seen corresponding path program 1 times [2022-12-14 05:25:21,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:25:21,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228435983] [2022-12-14 05:25:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:21,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:25:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:25:21,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:25:21,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228435983] [2022-12-14 05:25:21,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228435983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:25:21,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457554229] [2022-12-14 05:25:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:21,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:21,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:25:21,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:25:21,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:25:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:22,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:25:22,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:25:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:25:22,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:25:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:25:22,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457554229] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:25:22,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798141205] [2022-12-14 05:25:22,064 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 05:25:22,065 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:25:22,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:25:22,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:25:22,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:25:22,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:22,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:22,101 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 05:25:22,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 05:25:22,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:22,135 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 05:25:22,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 05:25:22,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:22,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 05:25:22,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:25:22,215 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 05:25:22,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 246 treesize of output 243 [2022-12-14 05:25:22,281 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 14 treesize of output 10 [2022-12-14 05:25:22,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:22,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 05:25:22,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:22,325 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 05:25:22,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 83 [2022-12-14 05:25:22,348 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 14 treesize of output 10 [2022-12-14 05:25:22,419 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:25:22,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1798141205] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:25:22,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:25:22,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 16 [2022-12-14 05:25:22,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125759548] [2022-12-14 05:25:22,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:25:22,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:25:22,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:25:22,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:25:22,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:25:22,915 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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 05:25:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:25:22,999 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-12-14 05:25:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:25:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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 18 [2022-12-14 05:25:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:25:23,000 INFO L225 Difference]: With dead ends: 29 [2022-12-14 05:25:23,000 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 05:25:23,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:25:23,002 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:25:23,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:25:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 05:25:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-12-14 05:25:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:25:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-14 05:25:23,007 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2022-12-14 05:25:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:25:23,007 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-14 05:25:23,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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 05:25:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-14 05:25:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 05:25:23,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:25:23,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:25:23,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:25:23,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:23,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:25:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:25:23,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1111882496, now seen corresponding path program 1 times [2022-12-14 05:25:23,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:25:23,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618067555] [2022-12-14 05:25:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:23,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:25:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:25:23,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:25:23,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618067555] [2022-12-14 05:25:23,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618067555] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:25:23,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565549198] [2022-12-14 05:25:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:23,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:23,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:25:23,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:25:23,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:25:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:25:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:25:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:25:23,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:25:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:25:23,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565549198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:25:23,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1457772313] [2022-12-14 05:25:23,341 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 05:25:23,342 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:25:23,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:25:23,342 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:25:23,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:25:23,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:23,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:23,376 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 05:25:23,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 05:25:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:23,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:23,404 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 05:25:23,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 05:25:23,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:23,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 05:25:23,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:25:23,480 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 05:25:23,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 246 treesize of output 243 [2022-12-14 05:25:23,542 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 14 treesize of output 10 [2022-12-14 05:25:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:23,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 05:25:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:23,578 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 05:25:23,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 83 [2022-12-14 05:25:23,597 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 14 treesize of output 10 [2022-12-14 05:25:23,662 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:25:24,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1457772313] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:25:24,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:25:24,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 16 [2022-12-14 05:25:24,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012383926] [2022-12-14 05:25:24,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:25:24,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:25:24,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:25:24,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:25:24,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:25:24,067 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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 05:25:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:25:24,210 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-12-14 05:25:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:25:24,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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 20 [2022-12-14 05:25:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:25:24,211 INFO L225 Difference]: With dead ends: 26 [2022-12-14 05:25:24,211 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 05:25:24,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:25:24,212 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:25:24,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:25:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 05:25:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-12-14 05:25:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 05:25:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-12-14 05:25:24,215 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 20 [2022-12-14 05:25:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:25:24,215 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-12-14 05:25:24,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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 05:25:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-12-14 05:25:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 05:25:24,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:25:24,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:25:24,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:25:24,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:24,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:25:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:25:24,418 INFO L85 PathProgramCache]: Analyzing trace with hash 108814125, now seen corresponding path program 1 times [2022-12-14 05:25:24,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:25:24,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050584514] [2022-12-14 05:25:24,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:24,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:25:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:25:24,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:25:24,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050584514] [2022-12-14 05:25:24,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050584514] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:25:24,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192838796] [2022-12-14 05:25:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:24,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:24,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:25:24,490 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:25:24,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:25:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:24,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:25:24,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:25:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:25:24,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:25:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:25:24,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192838796] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:25:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2009410300] [2022-12-14 05:25:24,556 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 05:25:24,556 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:25:24,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:25:24,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:25:24,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:25:24,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:24,592 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 05:25:24,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 05:25:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:24,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 05:25:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:24,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 05:25:24,675 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-12-14 05:25:24,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 242 [2022-12-14 05:25:24,716 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 14 treesize of output 10 [2022-12-14 05:25:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:24,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 05:25:24,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:24,764 INFO L321 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2022-12-14 05:25:24,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 84 [2022-12-14 05:25:24,788 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 14 treesize of output 10 [2022-12-14 05:25:24,985 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:25:25,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2009410300] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:25:25,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:25:25,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 16 [2022-12-14 05:25:25,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087127472] [2022-12-14 05:25:25,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:25:25,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:25:25,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:25:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:25:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:25:25,506 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 05:25:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:25:25,734 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-12-14 05:25:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 05:25:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 21 [2022-12-14 05:25:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:25:25,735 INFO L225 Difference]: With dead ends: 22 [2022-12-14 05:25:25,735 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 05:25:25,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-12-14 05:25:25,736 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:25:25,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:25:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 05:25:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 05:25:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:25:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 05:25:25,737 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2022-12-14 05:25:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:25:25,737 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 05:25:25,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 05:25:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 05:25:25,737 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 05:25:25,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 05:25:25,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:25:25,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:25,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 05:25:26,222 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2022-12-14 05:25:26,222 INFO L902 garLoopResultBuilder]: At program point L19-2(lines 18 23) the Hoare annotation is: true [2022-12-14 05:25:26,222 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 28 72) the Hoare annotation is: true [2022-12-14 05:25:26,222 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2022-12-14 05:25:26,222 INFO L899 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2022-12-14 05:25:26,222 INFO L895 garLoopResultBuilder]: At program point L37-3(lines 37 38) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~#string_B~0#1.base|) (<= |ULTIMATE.start_main_~found~0#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= 0 |ULTIMATE.start_main_~#string_A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#string_A~0#1.base|) (<= |ULTIMATE.start_main_~#string_B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) [2022-12-14 05:25:26,222 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 05:25:26,222 INFO L895 garLoopResultBuilder]: At program point L33-3(lines 33 34) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~#string_B~0#1.base|) (<= |ULTIMATE.start_main_~found~0#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= 0 |ULTIMATE.start_main_~#string_A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#string_A~0#1.base|) (<= |ULTIMATE.start_main_~#string_B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) [2022-12-14 05:25:26,223 INFO L899 garLoopResultBuilder]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2022-12-14 05:25:26,223 INFO L895 garLoopResultBuilder]: At program point L46-3(lines 46 47) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~nc_B~0#1|) (<= 0 |ULTIMATE.start_main_~#string_B~0#1.base|) (<= 5 |ULTIMATE.start_main_~i~0#1|) (= 0 |ULTIMATE.start_main_~#string_A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#string_A~0#1.base|) (<= |ULTIMATE.start_main_~#string_B~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_A~0#1.base|) (+ |ULTIMATE.start_main_~nc_A~0#1| |ULTIMATE.start_main_~#string_A~0#1.offset|)) 0) (<= 0 |ULTIMATE.start_main_~nc_A~0#1|) (<= 0 |ULTIMATE.start_main_~#string_B~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) [2022-12-14 05:25:26,223 INFO L899 garLoopResultBuilder]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2022-12-14 05:25:26,223 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 05:25:26,223 INFO L899 garLoopResultBuilder]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2022-12-14 05:25:26,223 INFO L895 garLoopResultBuilder]: At program point L42-3(lines 42 43) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~#string_B~0#1.base|) (<= 5 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#string_B~0#1.offset| 0) (= 0 |ULTIMATE.start_main_~#string_A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#string_A~0#1.base|) (<= 0 |ULTIMATE.start_main_~nc_A~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) [2022-12-14 05:25:26,223 INFO L899 garLoopResultBuilder]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2022-12-14 05:25:26,223 INFO L895 garLoopResultBuilder]: At program point L55-2(lines 53 65) the Hoare annotation is: (and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#string_A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nc_B~0#1|) (<= 0 |ULTIMATE.start_main_~#string_B~0#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~#string_A~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~found~0#1| 0) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#string_A~0#1.base|) (<= |ULTIMATE.start_main_~#string_B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nc_A~0#1|) (<= 0 |ULTIMATE.start_main_~#string_B~0#1.offset|) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|)) [2022-12-14 05:25:26,223 INFO L899 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2022-12-14 05:25:26,223 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-12-14 05:25:26,226 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-14 05:25:26,228 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 05:25:26,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 05:25:26 BoogieIcfgContainer [2022-12-14 05:25:26,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 05:25:26,241 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 05:25:26,241 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 05:25:26,241 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 05:25:26,241 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:25:18" (3/4) ... [2022-12-14 05:25:26,243 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 05:25:26,249 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2022-12-14 05:25:26,250 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-12-14 05:25:26,250 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 05:25:26,250 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 05:25:26,273 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 05:25:26,273 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 05:25:26,274 INFO L158 Benchmark]: Toolchain (without parser) took 8263.22ms. Allocated memory was 136.3MB in the beginning and 165.7MB in the end (delta: 29.4MB). Free memory was 103.1MB in the beginning and 119.0MB in the end (delta: -15.9MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2022-12-14 05:25:26,274 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 136.3MB. Free memory is still 106.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 05:25:26,274 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.82ms. Allocated memory is still 136.3MB. Free memory was 103.1MB in the beginning and 92.2MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 05:25:26,274 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.10ms. Allocated memory is still 136.3MB. Free memory was 92.2MB in the beginning and 90.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 05:25:26,274 INFO L158 Benchmark]: Boogie Preprocessor took 18.40ms. Allocated memory is still 136.3MB. Free memory was 90.5MB in the beginning and 89.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 05:25:26,275 INFO L158 Benchmark]: RCFGBuilder took 271.62ms. Allocated memory is still 136.3MB. Free memory was 89.2MB in the beginning and 74.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 05:25:26,275 INFO L158 Benchmark]: TraceAbstraction took 7724.43ms. Allocated memory was 136.3MB in the beginning and 165.7MB in the end (delta: 29.4MB). Free memory was 73.8MB in the beginning and 122.2MB in the end (delta: -48.4MB). Peak memory consumption was 66.9MB. Max. memory is 16.1GB. [2022-12-14 05:25:26,275 INFO L158 Benchmark]: Witness Printer took 32.58ms. Allocated memory is still 165.7MB. Free memory was 122.2MB in the beginning and 119.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 05:25:26,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 136.3MB. Free memory is still 106.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.82ms. Allocated memory is still 136.3MB. Free memory was 103.1MB in the beginning and 92.2MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.10ms. Allocated memory is still 136.3MB. Free memory was 92.2MB in the beginning and 90.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.40ms. Allocated memory is still 136.3MB. Free memory was 90.5MB in the beginning and 89.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 271.62ms. Allocated memory is still 136.3MB. Free memory was 89.2MB in the beginning and 74.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 7724.43ms. Allocated memory was 136.3MB in the beginning and 165.7MB in the end (delta: 29.4MB). Free memory was 73.8MB in the beginning and 122.2MB in the end (delta: -48.4MB). Peak memory consumption was 66.9MB. Max. memory is 16.1GB. * Witness Printer took 32.58ms. Allocated memory is still 165.7MB. Free memory was 122.2MB in the beginning and 119.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 20]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.7s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 46 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46 mSDsluCounter, 120 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 90 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 700 IncrementalHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 30 mSDtfsCounter, 700 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 296 GetRequests, 199 SyntacticMatches, 10 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 25 NumberOfFragments, 196 HoareAnnotationTreeSize, 7 FomulaSimplifications, 69 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 735 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 198 NumberOfCodeBlocks, 198 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 275 ConstructedInterpolants, 0 QuantifiedInterpolants, 337 SizeOfPredicates, 0 NumberOfNonLiveVariables, 563 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 54/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 2.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 70, DAG_INTERPRETER_EARLY_EXITS: 5, TOOLS_POST_APPLICATIONS: 131, TOOLS_POST_TIME: 1.7s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 131, TOOLS_QUANTIFIERELIM_TIME: 1.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 318, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 33, DOMAIN_WIDEN_TIME: 0.2s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 50, DOMAIN_ISSUBSETEQ_TIME: 0.1s, DOMAIN_ISBOTTOM_APPLICATIONS: 70, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 17, LOOP_SUMMARIZER_CACHE_MISSES: 17, LOOP_SUMMARIZER_OVERALL_TIME: 1.5s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.5s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 50, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 879, DAG_COMPRESSION_RETAINED_NODES: 222, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((((((((0 <= nc_B && 0 <= string_B) && 5 <= i) && 0 == string_A) && 0 <= string_A) && string_B <= 0) && unknown-#memory_int-unknown[string_A][nc_A + string_A] == 0) && 0 <= nc_A) && 0 <= string_B) && #NULL == 0) && found == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: ((((((((((((((0 <= #NULL && 0 <= string_A) && 0 <= nc_B) && 0 <= string_B) && #NULL <= 0) && string_A <= 0) && 0 <= j) && found <= 0) && #NULL <= 0) && 0 <= string_A) && string_B <= 0) && 0 <= nc_A) && 0 <= string_B) && 0 <= found) && 0 <= #NULL) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((((((((0 <= string_B && found <= 0) && 0 <= i) && 0 == string_A) && 0 <= string_A) && string_B <= 0) && 0 <= string_B) && #NULL == 0) && 0 <= found) && 0 <= unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((((((0 <= string_B && found <= 0) && 0 <= i) && 0 == string_A) && 0 <= string_A) && string_B <= 0) && 0 <= string_B) && #NULL == 0) && 0 <= found) && 0 <= unknown-#StackHeapBarrier-unknown) && #NULL == 0 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((0 <= string_B && 5 <= i) && string_B == 0) && 0 == string_A) && 0 <= string_A) && 0 <= nc_A) && #NULL == 0) && found == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && #NULL == 0 RESULT: Ultimate proved your program to be correct! [2022-12-14 05:25:26,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd798773-1ded-48ae-ac0d-868cf749ea2b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE