./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/count_up_down-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/count_up_down-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH --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 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:23:18,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:23:18,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:23:18,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:23:18,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:23:18,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:23:18,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:23:18,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:23:18,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:23:18,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:23:18,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:23:18,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:23:18,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:23:18,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:23:18,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:23:18,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:23:18,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:23:18,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:23:18,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:23:18,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:23:18,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:23:18,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:23:18,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:23:18,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:23:18,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:23:18,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:23:18,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:23:18,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:23:18,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:23:18,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:23:18,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:23:18,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:23:18,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:23:18,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:23:18,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:23:18,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:23:18,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:23:18,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:23:18,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:23:18,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:23:18,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:23:18,888 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:23:18,923 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:23:18,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:23:18,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:23:18,924 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:23:18,925 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:23:18,925 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:23:18,925 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:23:18,925 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:23:18,926 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:23:18,926 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:23:18,926 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:23:18,926 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:23:18,927 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:23:18,927 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:23:18,927 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:23:18,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:23:18,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:23:18,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:23:18,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:23:18,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:23:18,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:23:18,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:23:18,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:23:18,930 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:23:18,930 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:23:18,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:23:18,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:23:18,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:23:18,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:23:18,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:23:18,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:23:18,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:23:18,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:23:18,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:23:18,933 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:23:18,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:23:18,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:23:18,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:23:18,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:23:18,934 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_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826 [2021-11-03 04:23:19,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:23:19,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:23:19,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:23:19,188 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:23:19,189 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:23:19,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/loops/count_up_down-1.c [2021-11-03 04:23:19,266 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/data/81226df06/5ebd4e8298e84c8abc1575bad6636304/FLAG95241e026 [2021-11-03 04:23:19,664 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:23:19,665 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/sv-benchmarks/c/loops/count_up_down-1.c [2021-11-03 04:23:19,670 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/data/81226df06/5ebd4e8298e84c8abc1575bad6636304/FLAG95241e026 [2021-11-03 04:23:20,084 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/data/81226df06/5ebd4e8298e84c8abc1575bad6636304 [2021-11-03 04:23:20,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:23:20,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:23:20,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:23:20,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:23:20,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:23:20,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9b51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20, skipping insertion in model container [2021-11-03 04:23:20,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:23:20,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:23:20,281 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_b444e8b1-bc98-4a91-85cf-aa824155ff1f/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2021-11-03 04:23:20,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:23:20,324 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:23:20,348 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_b444e8b1-bc98-4a91-85cf-aa824155ff1f/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2021-11-03 04:23:20,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:23:20,365 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:23:20,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20 WrapperNode [2021-11-03 04:23:20,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:23:20,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:23:20,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:23:20,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:23:20,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:23:20,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:23:20,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:23:20,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:23:20,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:23:20,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:23:20,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:23:20,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:23:20,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (1/1) ... [2021-11-03 04:23:20,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:23:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:23:20,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:23:20,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:23:20,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:23:20,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:23:20,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:23:20,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:23:20,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:23:20,743 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:23:20,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:23:20 BoogieIcfgContainer [2021-11-03 04:23:20,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:23:20,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:23:20,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:23:20,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:23:20,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:23:20" (1/3) ... [2021-11-03 04:23:20,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55aeac0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:23:20, skipping insertion in model container [2021-11-03 04:23:20,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:23:20" (2/3) ... [2021-11-03 04:23:20,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55aeac0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:23:20, skipping insertion in model container [2021-11-03 04:23:20,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:23:20" (3/3) ... [2021-11-03 04:23:20,754 INFO L111 eAbstractionObserver]: Analyzing ICFG count_up_down-1.c [2021-11-03 04:23:20,759 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:23:20,759 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:23:20,805 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:23:20,813 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 [2021-11-03 04:23:20,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:23:20,828 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) [2021-11-03 04:23:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 04:23:20,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:20,834 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 04:23:20,835 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:23:20,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:20,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1818790, now seen corresponding path program 1 times [2021-11-03 04:23:20,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:23:20,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026770938] [2021-11-03 04:23:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:20,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:23:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:21,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:23:21,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026770938] [2021-11-03 04:23:21,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026770938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:21,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:21,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:23:21,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730675916] [2021-11-03 04:23:21,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:23:21,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:23:21,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:23:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:23:21,149 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 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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) [2021-11-03 04:23:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:21,216 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-03 04:23:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:23:21,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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 [2021-11-03 04:23:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:21,224 INFO L225 Difference]: With dead ends: 15 [2021-11-03 04:23:21,224 INFO L226 Difference]: Without dead ends: 6 [2021-11-03 04:23:21,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:23:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-03 04:23:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-03 04:23:21,271 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) [2021-11-03 04:23:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-03 04:23:21,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-03 04:23:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:21,273 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-03 04:23:21,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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) [2021-11-03 04:23:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-03 04:23:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:23:21,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:21,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:23:21,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:23:21,275 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:23:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:21,276 INFO L85 PathProgramCache]: Analyzing trace with hash 55770291, now seen corresponding path program 1 times [2021-11-03 04:23:21,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:23:21,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121825020] [2021-11-03 04:23:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:21,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:23:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:21,552 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:23:21,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121825020] [2021-11-03 04:23:21,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121825020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:23:21,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063357351] [2021-11-03 04:23:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:21,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:23:21,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:23:21,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:23:21,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:23:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:21,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:23:21,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:21,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:22,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063357351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:22,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1348716710] [2021-11-03 04:23:22,157 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:23:22,158 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:23:22,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:23:22,168 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:23:22,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:23:22,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,198 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:23:22,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:23:22,201 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:23:22,201 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:23:22,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:23:22,225 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-03 04:23:22,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:23:22,247 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:23:22,248 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:23:22,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:23:22,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:22,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:23:22,319 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:23:22,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:23:22,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:23:22,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,347 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:23:22,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:23:22,348 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:23:22,354 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,358 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-11-03 04:23:22,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,453 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:22,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 261 [2021-11-03 04:23:22,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:22,539 INFO L180 QuantifierPusher]: treesize reduction 30, result has 61.0 percent of original size [2021-11-03 04:23:22,542 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-03 04:23:22,550 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:23:22,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:23:22,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:23:22,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-03 04:23:22,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125574112] [2021-11-03 04:23:22,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 04:23:22,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:23:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 04:23:22,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:23:22,846 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:22,989 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-03 04:23:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:23:22,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 04:23:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:22,990 INFO L225 Difference]: With dead ends: 13 [2021-11-03 04:23:22,990 INFO L226 Difference]: Without dead ends: 9 [2021-11-03 04:23:22,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:23:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-03 04:23:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-03 04:23:22,994 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) [2021-11-03 04:23:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-03 04:23:22,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-03 04:23:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:22,995 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-03 04:23:22,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-03 04:23:22,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:23:22,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:22,996 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-03 04:23:23,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:23,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:23:23,197 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:23:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:23,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1307517978, now seen corresponding path program 2 times [2021-11-03 04:23:23,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:23:23,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523838483] [2021-11-03 04:23:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:23,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:23:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:23,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:23:23,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523838483] [2021-11-03 04:23:23,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523838483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:23:23,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340540342] [2021-11-03 04:23:23,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:23:23,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:23:23,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:23:23,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:23:23,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 04:23:23,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 04:23:23,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:23,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-03 04:23:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:24,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:24,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340540342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:24,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118721111] [2021-11-03 04:23:24,801 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:23:24,801 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:23:24,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:23:24,802 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:23:24,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:23:24,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,810 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:23:24,813 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:23:24,815 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:23:24,816 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,817 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:23:24,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:23:24,821 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-03 04:23:24,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:23:24,833 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:23:24,834 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,834 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:23:24,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:23:24,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:24,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:24,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:23:24,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:23:24,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:23:24,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:23:24,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:24,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:23:24,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:23:24,884 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:23:24,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-11-03 04:23:24,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:24,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:24,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:24,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:24,967 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 261 [2021-11-03 04:23:24,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:25,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:25,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:25,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:25,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:25,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:25,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:25,035 INFO L180 QuantifierPusher]: treesize reduction 30, result has 61.0 percent of original size [2021-11-03 04:23:25,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-03 04:23:25,049 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:23:25,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:23:25,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:23:25,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-03 04:23:25,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080537487] [2021-11-03 04:23:25,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 04:23:25,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:23:25,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 04:23:25,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-03 04:23:25,381 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-11-03 04:23:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:30,667 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-03 04:23:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 04:23:30,667 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 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 [2021-11-03 04:23:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:30,668 INFO L225 Difference]: With dead ends: 19 [2021-11-03 04:23:30,668 INFO L226 Difference]: Without dead ends: 15 [2021-11-03 04:23:30,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=219, Invalid=592, Unknown=1, NotChecked=0, Total=812 [2021-11-03 04:23:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-03 04:23:30,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-03 04:23:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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) [2021-11-03 04:23:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-03 04:23:30,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-03 04:23:30,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:30,674 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-03 04:23:30,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-11-03 04:23:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-03 04:23:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 04:23:30,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:30,675 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-03 04:23:30,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:30,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-03 04:23:30,876 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:23:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:30,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1742587706, now seen corresponding path program 3 times [2021-11-03 04:23:30,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:23:30,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592813672] [2021-11-03 04:23:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:30,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:23:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:32,961 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:23:32,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592813672] [2021-11-03 04:23:32,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592813672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:23:32,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249296545] [2021-11-03 04:23:32,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:23:32,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:23:32,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:23:32,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:23:32,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 04:23:33,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:23:33,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:33,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-03 04:23:33,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:36,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:41,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249296545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:41,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798878701] [2021-11-03 04:23:41,794 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:23:41,795 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:23:41,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:23:41,795 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:23:41,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:23:41,801 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,802 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:23:41,812 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:23:41,813 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:23:41,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:23:41,815 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:23:41,819 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-03 04:23:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:23:41,831 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:23:41,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,832 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:23:41,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:23:41,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:41,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:23:41,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:23:41,859 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:23:41,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:23:41,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:23:41,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:23:41,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:23:41,871 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-03 04:23:41,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,935 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:23:41,941 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-11-03 04:23:41,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:23:41,990 INFO L180 QuantifierPusher]: treesize reduction 30, result has 61.0 percent of original size [2021-11-03 04:23:41,992 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-03 04:23:41,997 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:23:42,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:23:42,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:23:42,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2021-11-03 04:23:42,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144027483] [2021-11-03 04:23:42,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-03 04:23:42,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:23:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-03 04:23:42,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2021-11-03 04:23:42,378 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 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) [2021-11-03 04:27:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:47,572 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2021-11-03 04:27:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-03 04:27:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 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 14 [2021-11-03 04:27:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:47,574 INFO L225 Difference]: With dead ends: 31 [2021-11-03 04:27:47,574 INFO L226 Difference]: Without dead ends: 27 [2021-11-03 04:27:47,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 251.2s TimeCoverageRelationStatistics Valid=701, Invalid=1898, Unknown=53, NotChecked=0, Total=2652 [2021-11-03 04:27:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-03 04:27:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-03 04:27:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 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) [2021-11-03 04:27:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-03 04:27:47,584 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-03 04:27:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:47,584 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-03 04:27:47,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 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) [2021-11-03 04:27:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-03 04:27:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-03 04:27:47,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:47,586 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-03 04:27:47,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-03 04:27:47,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-03 04:27:47,793 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:27:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:47,793 INFO L85 PathProgramCache]: Analyzing trace with hash 297761414, now seen corresponding path program 4 times [2021-11-03 04:27:47,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:27:47,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667998205] [2021-11-03 04:27:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:47,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:27:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:50,658 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:27:50,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667998205] [2021-11-03 04:27:50,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667998205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:27:50,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840865524] [2021-11-03 04:27:50,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:27:50,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:27:50,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:27:50,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:27:50,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b444e8b1-bc98-4a91-85cf-aa824155ff1f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 04:27:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:56,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-03 04:27:56,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:02,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:27,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840865524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:28:27,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203412614] [2021-11-03 04:28:27,231 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:28:27,232 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:28:27,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:28:27,233 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:28:27,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:28:27,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,237 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:28:27,237 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:28:27,238 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:28:27,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:28:27,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:28:27,242 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-03 04:28:27,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:28:27,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:28:27,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:28:27,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:28:27,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:27,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:28:27,285 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:28:27,288 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,289 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:28:27,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:28:27,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:28:27,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:28:27,297 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:28:27,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-11-03 04:28:27,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:28:27,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-11-03 04:28:27,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:28:27,440 INFO L180 QuantifierPusher]: treesize reduction 30, result has 61.0 percent of original size [2021-11-03 04:28:27,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-03 04:28:27,448 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:28:28,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:28:28,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:28:28,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 69 [2021-11-03 04:28:28,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668231882] [2021-11-03 04:28:28,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-03 04:28:28,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:28:28,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-03 04:28:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=4057, Unknown=1, NotChecked=0, Total=5256 [2021-11-03 04:28:28,092 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 70 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 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) [2021-11-03 04:31:22,025 WARN L207 SmtUtils]: Spent 1.00 m on a formula simplification that was a NOOP. DAG size: 217 [2021-11-03 04:32:57,265 WARN L207 SmtUtils]: Spent 1.16 m on a formula simplification that was a NOOP. DAG size: 219 [2021-11-03 04:36:53,852 WARN L207 SmtUtils]: Spent 1.32 m on a formula simplification that was a NOOP. DAG size: 201