./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum04-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum04-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE --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 363837b614bad810335bbe0c369ca77c24cc87938da6245b414371c201391312 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:05:44,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:05:44,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:05:44,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:05:44,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:05:44,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:05:44,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:05:44,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:05:44,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:05:44,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:05:44,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:05:44,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:05:44,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:05:44,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:05:44,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:05:44,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:05:44,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:05:44,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:05:44,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:05:44,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:05:44,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:05:44,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:05:44,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:05:44,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:05:44,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:05:44,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:05:44,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:05:44,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:05:44,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:05:44,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:05:44,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:05:44,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:05:44,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:05:44,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:05:44,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:05:44,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:05:44,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:05:44,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:05:44,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:05:44,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:05:44,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:05:44,932 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:05:44,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:05:44,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:05:44,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:05:44,957 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:05:44,957 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:05:44,957 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:05:44,958 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:05:44,958 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:05:44,958 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:05:44,958 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:05:44,958 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:05:44,959 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:05:44,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:05:44,959 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:05:44,959 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:05:44,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:05:44,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:05:44,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:05:44,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:05:44,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:05:44,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:05:44,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:05:44,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:05:44,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:05:44,962 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:05:44,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:05:44,962 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:05:44,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:05:44,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:05:44,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:05:44,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:05:44,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:05:44,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:05:44,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:05:44,964 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:05:44,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:05:44,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:05:44,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:05:44,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:05:44,965 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 363837b614bad810335bbe0c369ca77c24cc87938da6245b414371c201391312 [2021-10-24 10:05:45,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:05:45,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:05:45,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:05:45,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:05:45,216 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:05:45,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/loops/sum04-1.i [2021-10-24 10:05:45,289 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/data/fa839a4e1/eb5bbe1eb5dd46fc9d31a7fb97f4fd90/FLAGf61f5fa0d [2021-10-24 10:05:45,749 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:05:45,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/sv-benchmarks/c/loops/sum04-1.i [2021-10-24 10:05:45,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/data/fa839a4e1/eb5bbe1eb5dd46fc9d31a7fb97f4fd90/FLAGf61f5fa0d [2021-10-24 10:05:46,121 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/data/fa839a4e1/eb5bbe1eb5dd46fc9d31a7fb97f4fd90 [2021-10-24 10:05:46,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:05:46,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:05:46,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:05:46,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:05:46,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:05:46,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a27e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46, skipping insertion in model container [2021-10-24 10:05:46,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:05:46,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:05:46,417 WARN L228 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_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/sv-benchmarks/c/loops/sum04-1.i[808,821] [2021-10-24 10:05:46,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:05:46,436 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:05:46,449 WARN L228 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_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/sv-benchmarks/c/loops/sum04-1.i[808,821] [2021-10-24 10:05:46,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:05:46,465 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:05:46,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46 WrapperNode [2021-10-24 10:05:46,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:05:46,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:05:46,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:05:46,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:05:46,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:05:46,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:05:46,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:05:46,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:05:46,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:05:46,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:05:46,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:05:46,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:05:46,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (1/1) ... [2021-10-24 10:05:46,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:05:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:05:46,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:05:46,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:05:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:05:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:05:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:05:46,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:05:46,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:05:46,856 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 10:05:46,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:05:46 BoogieIcfgContainer [2021-10-24 10:05:46,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:05:46,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:05:46,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:05:46,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:05:46,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:05:46" (1/3) ... [2021-10-24 10:05:46,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b00bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:05:46, skipping insertion in model container [2021-10-24 10:05:46,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:05:46" (2/3) ... [2021-10-24 10:05:46,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b00bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:05:46, skipping insertion in model container [2021-10-24 10:05:46,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:05:46" (3/3) ... [2021-10-24 10:05:46,870 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2021-10-24 10:05:46,875 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:05:46,875 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:05:46,932 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:05:46,939 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 10:05:46,939 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:05:46,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2021-10-24 10:05:46,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 10:05:46,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:05:46,959 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 10:05:46,960 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:05:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:05:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2006377, now seen corresponding path program 1 times [2021-10-24 10:05:46,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:05:46,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080847376] [2021-10-24 10:05:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:05:46,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:05:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:05:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:05:47,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:05:47,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080847376] [2021-10-24 10:05:47,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080847376] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:05:47,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:05:47,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:05:47,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921041738] [2021-10-24 10:05:47,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:05:47,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:05:47,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:05:47,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:05:47,295 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-24 10:05:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:05:47,344 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-24 10:05:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:05:47,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-24 10:05:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:05:47,358 INFO L225 Difference]: With dead ends: 13 [2021-10-24 10:05:47,358 INFO L226 Difference]: Without dead ends: 6 [2021-10-24 10:05:47,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:05:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-24 10:05:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-24 10:05:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:05:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-24 10:05:47,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-24 10:05:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:05:47,421 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-24 10:05:47,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-24 10:05:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-24 10:05:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 10:05:47,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:05:47,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 10:05:47,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:05:47,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:05:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:05:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash 62154406, now seen corresponding path program 1 times [2021-10-24 10:05:47,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:05:47,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136668838] [2021-10-24 10:05:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:05:47,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:05:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:05:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:05:47,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:05:47,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136668838] [2021-10-24 10:05:47,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136668838] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:05:47,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620601903] [2021-10-24 10:05:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:05:47,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:05:47,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:05:47,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:05:47,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:05:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:05:47,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:05:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:05:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:05:47,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:05:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:05:47,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620601903] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:05:47,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277034041] [2021-10-24 10:05:47,803 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-24 10:05:47,804 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:05:47,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:05:47,825 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:05:47,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:05:47,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:47,908 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:05:47,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:47,913 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:05:47,917 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:05:47,921 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:47,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 10:05:47,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-24 10:05:47,958 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-10-24 10:05:47,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:05:47,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-24 10:05:47,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:47,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:05:47,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:48,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:05:48,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:05:48,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:48,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:05:48,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:05:48,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:05:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:05:48,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-24 10:05:48,099 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:48,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:05:48,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:48,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:05:48,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:05:48,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:48,128 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:48,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-24 10:05:48,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:05:48,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:92, output treesize:77 [2021-10-24 10:05:48,157 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.1 percent of original size [2021-10-24 10:05:48,169 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-24 10:05:48,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:48,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-10-24 10:05:48,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:48,461 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.6 percent of original size [2021-10-24 10:05:48,471 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-24 10:05:48,480 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:05:48,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 10:05:48,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:05:48,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-10-24 10:05:48,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651279516] [2021-10-24 10:05:48,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:05:48,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:05:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:05:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:05:48,711 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:05:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:05:48,732 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-10-24 10:05:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:05:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 10:05:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:05:48,733 INFO L225 Difference]: With dead ends: 12 [2021-10-24 10:05:48,734 INFO L226 Difference]: Without dead ends: 9 [2021-10-24 10:05:48,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:05:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-24 10:05:48,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-24 10:05:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:05:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-24 10:05:48,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-10-24 10:05:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:05:48,739 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-24 10:05:48,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:05:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-24 10:05:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 10:05:48,740 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:05:48,741 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-10-24 10:05:48,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:05:48,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:05:48,963 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:05:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:05:48,964 INFO L82 PathProgramCache]: Analyzing trace with hash 468026537, now seen corresponding path program 2 times [2021-10-24 10:05:48,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:05:48,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762370362] [2021-10-24 10:05:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:05:48,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:05:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:05:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:05:49,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:05:49,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762370362] [2021-10-24 10:05:49,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762370362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:05:49,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848592063] [2021-10-24 10:05:49,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:05:49,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:05:49,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:05:49,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:05:49,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 10:05:49,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-24 10:05:49,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:05:49,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:05:49,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:05:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:05:49,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:05:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:05:49,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848592063] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:05:49,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [878656863] [2021-10-24 10:05:49,244 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-24 10:05:49,244 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:05:49,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:05:49,245 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:05:49,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:05:49,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,257 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:05:49,257 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,258 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:05:49,260 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:05:49,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 10:05:49,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-24 10:05:49,274 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 10=[|v_#valid_10|]} [2021-10-24 10:05:49,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:05:49,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-24 10:05:49,285 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,288 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:05:49,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:05:49,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:05:49,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:05:49,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:05:49,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:05:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:05:49,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-24 10:05:49,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:05:49,324 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,325 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:05:49,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:05:49,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,330 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-24 10:05:49,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:05:49,336 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:92, output treesize:77 [2021-10-24 10:05:49,341 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.1 percent of original size [2021-10-24 10:05:49,351 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-24 10:05:49,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,399 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:05:49,422 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-10-24 10:05:49,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:05:49,480 INFO L180 QuantifierPusher]: treesize reduction 24, result has 69.6 percent of original size [2021-10-24 10:05:49,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-24 10:05:49,501 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:05:49,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 10:05:49,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:05:49,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-10-24 10:05:49,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252248910] [2021-10-24 10:05:49,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:05:49,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:05:49,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:05:49,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-10-24 10:05:49,704 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-10-24 10:05:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:05:49,722 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-10-24 10:05:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 10:05:49,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 10:05:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:05:49,724 INFO L225 Difference]: With dead ends: 16 [2021-10-24 10:05:49,724 INFO L226 Difference]: Without dead ends: 13 [2021-10-24 10:05:49,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-10-24 10:05:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-24 10:05:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-24 10:05:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:05:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-24 10:05:49,728 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2021-10-24 10:05:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:05:49,728 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-24 10:05:49,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-10-24 10:05:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-24 10:05:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:05:49,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:05:49,730 INFO L512 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2021-10-24 10:05:49,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:05:49,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-24 10:05:49,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:05:49,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:05:49,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1620653079, now seen corresponding path program 3 times [2021-10-24 10:05:49,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:05:49,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579744061] [2021-10-24 10:05:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:05:49,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:05:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:05:49,967 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:05:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:05:50,010 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 10:05:50,010 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:05:50,011 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:05:50,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-24 10:05:50,016 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:05:50,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:05:50 BoogieIcfgContainer [2021-10-24 10:05:50,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:05:50,038 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:05:50,038 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:05:50,038 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:05:50,039 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:05:46" (3/4) ... [2021-10-24 10:05:50,040 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 10:05:50,077 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:05:50,077 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:05:50,078 INFO L168 Benchmark]: Toolchain (without parser) took 3950.67 ms. Allocated memory was 102.8 MB in the beginning and 134.2 MB in the end (delta: 31.5 MB). Free memory was 73.9 MB in the beginning and 85.7 MB in the end (delta: -11.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:05:50,078 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory was 57.2 MB in the beginning and 57.1 MB in the end (delta: 63.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:05:50,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.92 ms. Allocated memory is still 102.8 MB. Free memory was 73.9 MB in the beginning and 77.9 MB in the end (delta: -4.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:05:50,079 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.45 ms. Allocated memory is still 102.8 MB. Free memory was 77.9 MB in the beginning and 76.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:05:50,080 INFO L168 Benchmark]: Boogie Preprocessor took 19.75 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 75.5 MB in the end (delta: 813.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:05:50,080 INFO L168 Benchmark]: RCFGBuilder took 339.77 ms. Allocated memory is still 102.8 MB. Free memory was 75.5 MB in the beginning and 65.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:05:50,080 INFO L168 Benchmark]: TraceAbstraction took 3177.69 ms. Allocated memory was 102.8 MB in the beginning and 134.2 MB in the end (delta: 31.5 MB). Free memory was 65.0 MB in the beginning and 87.8 MB in the end (delta: -22.7 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:05:50,081 INFO L168 Benchmark]: Witness Printer took 39.14 ms. Allocated memory is still 134.2 MB. Free memory was 87.8 MB in the beginning and 85.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:05:50,084 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory was 57.2 MB in the beginning and 57.1 MB in the end (delta: 63.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.92 ms. Allocated memory is still 102.8 MB. Free memory was 73.9 MB in the beginning and 77.9 MB in the end (delta: -4.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.45 ms. Allocated memory is still 102.8 MB. Free memory was 77.9 MB in the beginning and 76.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.75 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 75.5 MB in the end (delta: 813.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 339.77 ms. Allocated memory is still 102.8 MB. Free memory was 75.5 MB in the beginning and 65.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3177.69 ms. Allocated memory was 102.8 MB in the beginning and 134.2 MB in the end (delta: 31.5 MB). Free memory was 65.0 MB in the beginning and 87.8 MB in the end (delta: -22.7 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Witness Printer took 39.14 ms. Allocated memory is still 134.2 MB. Free memory was 87.8 MB in the beginning and 85.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND FALSE !(i<=8) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3085.1ms, OverallIterations: 4, TraceHistogramMax: 8, EmptinessCheckTime: 11.8ms, AutomataDifference: 136.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 16 SDs, 0 SdLazy, 24 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 527.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.5ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 28.1ms SsaConstructionTime, 148.7ms SatisfiabilityAnalysisTime, 500.1ms InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 80 SizeOfPredicates, 0 NumberOfNonLiveVariables, 94 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 10:05:50,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bc0ef12-d41c-4214-b0ef-cb50b714fbfd/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...