./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF --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 c189c1cb91ea61745da6126e2d9c114f6ae511079741dc75bc227de256009336 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:04:17,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:04:17,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:04:17,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:04:17,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:04:17,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:04:17,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:04:17,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:04:17,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:04:17,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:04:17,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:04:17,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:04:17,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:04:17,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:04:17,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:04:17,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:04:17,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:04:17,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:04:17,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:04:17,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:04:17,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:04:17,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:04:17,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:04:17,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:04:17,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:04:17,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:04:17,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:04:17,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:04:17,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:04:17,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:04:17,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:04:17,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:04:17,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:04:17,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:04:17,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:04:17,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:04:17,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:04:17,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:04:17,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:04:17,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:04:17,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:04:17,877 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:04:17,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:04:17,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:04:17,923 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:04:17,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:04:17,923 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:04:17,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:04:17,924 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:04:17,924 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:04:17,934 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:04:17,935 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:04:17,936 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:04:17,936 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:04:17,936 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:04:17,936 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:04:17,937 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:04:17,937 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:04:17,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:04:17,938 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:04:17,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:04:17,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:04:17,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:04:17,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:04:17,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:04:17,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:04:17,940 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:04:17,940 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:04:17,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:04:17,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:04:17,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:04:17,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:04:17,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:04:17,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:04:17,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:04:17,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:04:17,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:04:17,944 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:04:17,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:04:17,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:04:17,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:04:17,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:04:17,945 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_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c189c1cb91ea61745da6126e2d9c114f6ae511079741dc75bc227de256009336 [2021-11-12 23:04:18,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:04:18,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:04:18,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:04:18,285 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:04:18,286 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:04:18,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2021-11-12 23:04:18,368 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/data/f6d0f64ac/a1e3206157844a0fa2585930fd1fb128/FLAGf74ad4f10 [2021-11-12 23:04:18,823 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:04:18,824 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2021-11-12 23:04:18,830 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/data/f6d0f64ac/a1e3206157844a0fa2585930fd1fb128/FLAGf74ad4f10 [2021-11-12 23:04:19,216 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/data/f6d0f64ac/a1e3206157844a0fa2585930fd1fb128 [2021-11-12 23:04:19,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:04:19,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:04:19,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:04:19,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:04:19,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:04:19,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df80396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19, skipping insertion in model container [2021-11-12 23:04:19,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:04:19,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:04:19,434 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_538d2fee-a727-49c6-982f-a367033b83b6/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i[809,822] [2021-11-12 23:04:19,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:04:19,472 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:04:19,492 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_538d2fee-a727-49c6-982f-a367033b83b6/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i[809,822] [2021-11-12 23:04:19,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:04:19,514 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:04:19,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19 WrapperNode [2021-11-12 23:04:19,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:04:19,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:04:19,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:04:19,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:04:19,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:04:19,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:04:19,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:04:19,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:04:19,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:04:19,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:04:19,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:04:19,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:04:19,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (1/1) ... [2021-11-12 23:04:19,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:04:19,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:19,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:04:19,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:04:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:04:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-12 23:04:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:04:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-12 23:04:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:04:19,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:04:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-12 23:04:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:04:20,000 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:04:20,000 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:04:20,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:04:20 BoogieIcfgContainer [2021-11-12 23:04:20,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:04:20,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:04:20,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:04:20,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:04:20,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:04:19" (1/3) ... [2021-11-12 23:04:20,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2536c077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:04:20, skipping insertion in model container [2021-11-12 23:04:20,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19" (2/3) ... [2021-11-12 23:04:20,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2536c077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:04:20, skipping insertion in model container [2021-11-12 23:04:20,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:04:20" (3/3) ... [2021-11-12 23:04:20,025 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2021-11-12 23:04:20,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:04:20,030 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:04:20,112 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:04:20,123 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 [2021-11-12 23:04:20,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:04:20,147 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) [2021-11-12 23:04:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:04:20,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:20,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:04:20,153 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:20,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1941830, now seen corresponding path program 1 times [2021-11-12 23:04:20,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:20,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965315472] [2021-11-12 23:04:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:20,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:20,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:20,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965315472] [2021-11-12 23:04:20,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965315472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:20,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:20,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:04:20,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14966482] [2021-11-12 23:04:20,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:20,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:20,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:20,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:20,367 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:20,395 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-12 23:04:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-12 23:04:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:20,411 INFO L225 Difference]: With dead ends: 13 [2021-11-12 23:04:20,413 INFO L226 Difference]: Without dead ends: 6 [2021-11-12 23:04:20,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:20,423 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:20,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.42ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 12.97ms Time] [2021-11-12 23:04:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-12 23:04:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-12 23:04:20,457 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) [2021-11-12 23:04:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-12 23:04:20,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-12 23:04:20,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:20,460 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-12 23:04:20,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:20,460 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-12 23:04:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 23:04:20,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:20,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 23:04:20,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:04:20,462 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:20,467 INFO L85 PathProgramCache]: Analyzing trace with hash 60064071, now seen corresponding path program 1 times [2021-11-12 23:04:20,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:20,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246026845] [2021-11-12 23:04:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:20,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:20,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:20,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246026845] [2021-11-12 23:04:20,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246026845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:20,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982579969] [2021-11-12 23:04:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:20,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:20,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:20,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:20,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:04:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:20,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:20,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982579969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:20,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085800133] [2021-11-12 23:04:20,769 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:04:20,769 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:04:20,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:04:20,779 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:04:20,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:04:20,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:20,868 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:20,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:20,886 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:04:20,888 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:20,888 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:20,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:04:20,891 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:20,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:20,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-12 23:04:20,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-12 23:04:20,923 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 36=[|v_#valid_25|]} [2021-11-12 23:04:20,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:20,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-12 23:04:20,983 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:20,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:20,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:20,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:20,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:20,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:21,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,155 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 23:04:21,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 42 [2021-11-12 23:04:21,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:21,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:21,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:21,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:21,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:21,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-12 23:04:21,264 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:21,272 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,273 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:21,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:21,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:21,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,326 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-11-12 23:04:21,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:21,338 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:169, output treesize:136 [2021-11-12 23:04:21,359 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-12 23:04:21,368 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:21,371 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,377 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-12 23:04:21,383 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 156 [2021-11-12 23:04:21,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2021-11-12 23:04:21,418 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,426 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-12 23:04:21,428 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-12 23:04:21,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:21,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:21,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,457 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-12 23:04:21,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:21,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:154, output treesize:139 [2021-11-12 23:04:21,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:21,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:21,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:21,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,646 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:21,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 277 [2021-11-12 23:04:21,676 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:21,685 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,692 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:21,693 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-12 23:04:21,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 337 [2021-11-12 23:04:21,705 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:21,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 306 [2021-11-12 23:04:21,720 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 365 [2021-11-12 23:04:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-11-12 23:04:21,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:21,787 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,788 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:21,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:21,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:21,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-11-12 23:04:21,849 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:21,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:21,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:21,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:21,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:21,939 INFO L180 QuantifierPusher]: treesize reduction 94, result has 78.4 percent of original size [2021-11-12 23:04:21,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 341 [2021-11-12 23:04:21,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-12 23:04:21,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:447, output treesize:341 [2021-11-12 23:04:21,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:22,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:22,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:22,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:22,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:22,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:22,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:22,053 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-11-12 23:04:22,060 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:22,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:22,061 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-12 23:04:22,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-12 23:04:22,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:22,099 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-12 23:04:22,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-12 23:04:22,101 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:22,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:22,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:22,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:22,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:22,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:22,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:22,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:22,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-11-12 23:04:22,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:22,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-11-12 23:04:22,129 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:04:22,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:04:22,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:04:22,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-12 23:04:22,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190106994] [2021-11-12 23:04:22,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:04:22,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:04:22,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:22,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:04:22,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:04:22,439 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:22,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:22,462 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-12 23:04:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:04:22,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-12 23:04:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:22,463 INFO L225 Difference]: With dead ends: 12 [2021-11-12 23:04:22,463 INFO L226 Difference]: Without dead ends: 9 [2021-11-12 23:04:22,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:04:22,465 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.54ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:22,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.54ms Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 17.27ms Time] [2021-11-12 23:04:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-12 23:04:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-12 23:04:22,470 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) [2021-11-12 23:04:22,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-12 23:04:22,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-12 23:04:22,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:22,472 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-12 23:04:22,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:22,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-12 23:04:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:04:22,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:22,474 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-12 23:04:22,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:22,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:22,687 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1764353658, now seen corresponding path program 2 times [2021-11-12 23:04:22,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:22,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745286727] [2021-11-12 23:04:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:22,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:22,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:22,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745286727] [2021-11-12 23:04:22,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745286727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:22,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327146366] [2021-11-12 23:04:22,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:04:22,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:22,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:22,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:22,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:04:22,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 23:04:22,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:04:22,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:04:22,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:22,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:22,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327146366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:22,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1119498753] [2021-11-12 23:04:22,969 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:04:22,969 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:04:22,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:04:22,970 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:04:22,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:04:22,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:22,977 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:22,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:22,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:04:22,978 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:22,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:22,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:04:22,980 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:22,981 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:22,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-12 23:04:22,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-12 23:04:22,987 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 36=[|v_#valid_26|]} [2021-11-12 23:04:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:22,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:22,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-12 23:04:23,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:23,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:23,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:23,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,058 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 23:04:23,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 42 [2021-11-12 23:04:23,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:23,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:23,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:23,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:23,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-12 23:04:23,083 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:23,085 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:23,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:23,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,093 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,095 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-11-12 23:04:23,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:23,096 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:169, output treesize:136 [2021-11-12 23:04:23,100 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-12 23:04:23,103 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:23,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-12 23:04:23,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 156 [2021-11-12 23:04:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2021-11-12 23:04:23,121 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,123 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:04:23,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:04:23,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:23,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,133 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-12 23:04:23,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:23,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:154, output treesize:143 [2021-11-12 23:04:23,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,204 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:23,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 281 [2021-11-12 23:04:23,216 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:23,220 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,221 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:23,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-12 23:04:23,224 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:23,225 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 23:04:23,229 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 341 [2021-11-12 23:04:23,230 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:23,233 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-11-12 23:04:23,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 369 [2021-11-12 23:04:23,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 62 [2021-11-12 23:04:23,285 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:23,288 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,289 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:23,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:23,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:23,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-11-12 23:04:23,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:23,306 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:23,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:23,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,350 INFO L180 QuantifierPusher]: treesize reduction 94, result has 78.4 percent of original size [2021-11-12 23:04:23,354 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 341 [2021-11-12 23:04:23,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-12 23:04:23,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:451, output treesize:341 [2021-11-12 23:04:23,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,414 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-11-12 23:04:23,416 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:23,417 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,417 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-12 23:04:23,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-12 23:04:23,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:23,434 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-12 23:04:23,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-12 23:04:23,435 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:23,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,437 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:23,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:23,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:23,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,440 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:23,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-11-12 23:04:23,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:23,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-11-12 23:04:23,448 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:04:23,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:04:23,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:04:23,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-12 23:04:23,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156555618] [2021-11-12 23:04:23,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:04:23,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:04:23,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:23,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:04:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:04:23,738 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:23,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:23,762 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-12 23:04:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:04:23,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:04:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:23,763 INFO L225 Difference]: With dead ends: 18 [2021-11-12 23:04:23,763 INFO L226 Difference]: Without dead ends: 15 [2021-11-12 23:04:23,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:04:23,765 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.44ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:23,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 22 Unknown, 0 Unchecked, 0.44ms Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 17.88ms Time] [2021-11-12 23:04:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-12 23:04:23,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-12 23:04:23,769 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) [2021-11-12 23:04:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-12 23:04:23,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-12 23:04:23,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:23,770 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-12 23:04:23,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:23,770 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-12 23:04:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:04:23,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:23,771 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-12 23:04:23,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:23,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:23,987 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:23,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:23,987 INFO L85 PathProgramCache]: Analyzing trace with hash 193090022, now seen corresponding path program 3 times [2021-11-12 23:04:23,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:23,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320914365] [2021-11-12 23:04:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:23,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:24,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:24,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320914365] [2021-11-12 23:04:24,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320914365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:24,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102568379] [2021-11-12 23:04:24,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:04:24,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:24,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:24,135 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:24,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:04:24,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:04:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:04:24,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:04:24,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:24,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:24,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102568379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:24,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516572132] [2021-11-12 23:04:24,523 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:04:24,523 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:04:24,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:04:24,524 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:04:24,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:04:24,530 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,531 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:24,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:04:24,533 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:24,534 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-12 23:04:24,536 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:24,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,537 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:04:24,539 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-12 23:04:24,543 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 36=[|v_#valid_27|]} [2021-11-12 23:04:24,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-12 23:04:24,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:24,563 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:24,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:24,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:24,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,626 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 23:04:24,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 42 [2021-11-12 23:04:24,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:24,633 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:24,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:24,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:24,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:24,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-12 23:04:24,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,653 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:24,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:24,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:24,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:24,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,662 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,664 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-11-12 23:04:24,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:24,665 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:169, output treesize:136 [2021-11-12 23:04:24,668 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-12 23:04:24,673 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:24,674 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-12 23:04:24,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 156 [2021-11-12 23:04:24,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2021-11-12 23:04:24,690 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:04:24,696 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,696 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:04:24,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:24,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:24,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-12 23:04:24,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:24,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:154, output treesize:143 [2021-11-12 23:04:24,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:24,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:24,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:24,783 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,791 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:24,795 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 281 [2021-11-12 23:04:24,809 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:24,813 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,819 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:24,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 23:04:24,821 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:24,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-12 23:04:24,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 341 [2021-11-12 23:04:24,828 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:24,831 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-11-12 23:04:24,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 369 [2021-11-12 23:04:24,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 62 [2021-11-12 23:04:24,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,887 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-12 23:04:24,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-12 23:04:24,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:24,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:24,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-11-12 23:04:24,904 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:04:24,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,909 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:04:24,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:24,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:24,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:24,965 INFO L180 QuantifierPusher]: treesize reduction 94, result has 78.4 percent of original size [2021-11-12 23:04:24,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 341 [2021-11-12 23:04:24,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-12 23:04:24,971 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:451, output treesize:341 [2021-11-12 23:04:24,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:25,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:25,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:25,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:25,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:25,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:25,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:25,033 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-11-12 23:04:25,037 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:25,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:25,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-12 23:04:25,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-12 23:04:25,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:25,053 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-12 23:04:25,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-12 23:04:25,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:25,055 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:25,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:25,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:25,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:25,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:25,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:25,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:25,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-11-12 23:04:25,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:25,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-11-12 23:04:25,067 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:04:25,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:04:25,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:04:25,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-12 23:04:25,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865749059] [2021-11-12 23:04:25,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:04:25,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 23:04:25,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 23:04:25,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:04:25,351 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:25,399 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-12 23:04:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:04:25,399 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-12 23:04:25,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:25,401 INFO L225 Difference]: With dead ends: 30 [2021-11-12 23:04:25,401 INFO L226 Difference]: Without dead ends: 27 [2021-11-12 23:04:25,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:04:25,405 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:25,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 41 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [14 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 31.31ms Time] [2021-11-12 23:04:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-12 23:04:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-12 23:04:25,414 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) [2021-11-12 23:04:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-12 23:04:25,416 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-12 23:04:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:25,416 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-12 23:04:25,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-12 23:04:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 23:04:25,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:25,417 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-12 23:04:25,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:25,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-12 23:04:25,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:25,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1874160294, now seen corresponding path program 4 times [2021-11-12 23:04:25,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:25,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661978602] [2021-11-12 23:04:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:25,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:26,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:26,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661978602] [2021-11-12 23:04:26,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661978602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:26,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774109862] [2021-11-12 23:04:26,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:04:26,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:26,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:26,071 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:26,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:04:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:26,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 23:04:26,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:26,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:27,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774109862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:27,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1994111586] [2021-11-12 23:04:27,028 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:04:27,028 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:04:27,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:04:27,028 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:04:27,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:04:27,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,034 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:27,035 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:04:27,036 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:27,036 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,037 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-12 23:04:27,037 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:27,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:04:27,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-12 23:04:27,043 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 36=[|v_#valid_28|]} [2021-11-12 23:04:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-12 23:04:27,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,059 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:27,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:27,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:27,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,103 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 23:04:27,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 42 [2021-11-12 23:04:27,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:27,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:27,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:27,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:27,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-12 23:04:27,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:27,128 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:27,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:27,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,137 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-11-12 23:04:27,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:27,137 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:169, output treesize:136 [2021-11-12 23:04:27,142 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-12 23:04:27,144 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:27,145 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,145 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-12 23:04:27,147 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 156 [2021-11-12 23:04:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2021-11-12 23:04:27,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,165 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:04:27,166 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:04:27,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:27,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,173 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-12 23:04:27,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:27,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:154, output treesize:143 [2021-11-12 23:04:27,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,245 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,250 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:27,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,257 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 281 [2021-11-12 23:04:27,262 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:27,265 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,267 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:27,268 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 23:04:27,269 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:27,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-12 23:04:27,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 341 [2021-11-12 23:04:27,274 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:27,277 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,280 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-11-12 23:04:27,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 369 [2021-11-12 23:04:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-11-12 23:04:27,305 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:04:27,309 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:04:27,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:27,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:27,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 62 [2021-11-12 23:04:27,322 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,323 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:27,324 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,326 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:27,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:27,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,362 INFO L180 QuantifierPusher]: treesize reduction 94, result has 78.3 percent of original size [2021-11-12 23:04:27,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 339 [2021-11-12 23:04:27,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-12 23:04:27,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:451, output treesize:339 [2021-11-12 23:04:27,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,414 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-11-12 23:04:27,416 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:27,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,417 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-12 23:04:27,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-12 23:04:27,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:27,432 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-12 23:04:27,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-12 23:04:27,433 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,435 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:27,436 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:27,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:27,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:27,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:27,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-11-12 23:04:27,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:27,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-11-12 23:04:27,450 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:04:27,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:04:27,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:04:27,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-12 23:04:27,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233061159] [2021-11-12 23:04:27,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:04:27,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-12 23:04:27,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-12 23:04:27,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2021-11-12 23:04:27,733 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) [2021-11-12 23:04:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:27,854 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-12 23:04:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 23:04:27,855 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 26 [2021-11-12 23:04:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:27,856 INFO L225 Difference]: With dead ends: 54 [2021-11-12 23:04:27,856 INFO L226 Difference]: Without dead ends: 51 [2021-11-12 23:04:27,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2021-11-12 23:04:27,859 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:27,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 82 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [28 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 75.86ms Time] [2021-11-12 23:04:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-12 23:04:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-12 23:04:27,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2021-11-12 23:04:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-12 23:04:27,875 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-12 23:04:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:27,875 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-12 23:04:27,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) [2021-11-12 23:04:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-12 23:04:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-12 23:04:27,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:27,880 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2021-11-12 23:04:27,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:28,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-12 23:04:28,097 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:28,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1326564314, now seen corresponding path program 5 times [2021-11-12 23:04:28,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:28,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035721359] [2021-11-12 23:04:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:28,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:29,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:29,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035721359] [2021-11-12 23:04:29,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035721359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:29,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338425049] [2021-11-12 23:04:29,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:04:29,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:29,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:29,255 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:29,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:04:30,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-12 23:04:30,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:04:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-12 23:04:30,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:30,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:33,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338425049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:33,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426329761] [2021-11-12 23:04:33,688 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:04:33,689 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:04:33,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:04:33,689 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:04:33,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:04:33,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,702 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:33,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:04:33,703 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:33,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:04:33,705 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:33,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,710 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-12 23:04:33,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-12 23:04:33,714 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 36=[|v_#valid_29|]} [2021-11-12 23:04:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-12 23:04:33,728 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,729 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:33,729 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,729 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:33,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:33,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:33,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,765 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 23:04:33,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 42 [2021-11-12 23:04:33,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,768 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:33,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:33,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:33,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:33,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:33,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-12 23:04:33,784 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:33,786 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,787 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:33,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:33,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:33,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,793 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-11-12 23:04:33,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:33,795 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:169, output treesize:136 [2021-11-12 23:04:33,798 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-12 23:04:33,800 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:33,801 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,801 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-12 23:04:33,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 156 [2021-11-12 23:04:33,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2021-11-12 23:04:33,817 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:04:33,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:04:33,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:33,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:33,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,828 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-12 23:04:33,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:33,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:154, output treesize:143 [2021-11-12 23:04:33,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:33,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:33,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:33,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,914 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:33,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 281 [2021-11-12 23:04:33,942 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:33,945 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,946 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:33,947 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 23:04:33,948 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:33,949 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-12 23:04:33,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 341 [2021-11-12 23:04:33,954 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:33,957 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-11-12 23:04:33,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 369 [2021-11-12 23:04:33,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:33,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-11-12 23:04:33,991 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:33,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:33,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:33,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:34,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:34,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 62 [2021-11-12 23:04:34,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:34,009 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-12 23:04:34,010 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:34,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-12 23:04:34,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:34,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:34,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:34,045 INFO L180 QuantifierPusher]: treesize reduction 94, result has 78.5 percent of original size [2021-11-12 23:04:34,048 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 343 [2021-11-12 23:04:34,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-12 23:04:34,050 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:451, output treesize:343 [2021-11-12 23:04:34,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:34,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:34,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:34,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:34,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:34,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:34,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:34,100 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-11-12 23:04:34,102 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:34,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:34,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-12 23:04:34,136 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-12 23:04:34,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:34,149 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-12 23:04:34,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-12 23:04:34,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:34,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:34,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:34,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:34,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:34,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:34,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:34,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:34,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-11-12 23:04:34,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:34,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-11-12 23:04:34,165 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:04:34,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:04:34,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:04:34,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-12 23:04:34,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028653877] [2021-11-12 23:04:34,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:04:34,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-12 23:04:34,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:34,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-12 23:04:34,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2021-11-12 23:04:34,526 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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) [2021-11-12 23:04:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:34,699 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2021-11-12 23:04:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-12 23:04:34,699 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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 50 [2021-11-12 23:04:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:34,701 INFO L225 Difference]: With dead ends: 102 [2021-11-12 23:04:34,701 INFO L226 Difference]: Without dead ends: 99 [2021-11-12 23:04:34,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2021-11-12 23:04:34,706 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.75ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:34,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 155 Unknown, 0 Unchecked, 2.75ms Time], IncrementalHoareTripleChecker [55 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 95.97ms Time] [2021-11-12 23:04:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-12 23:04:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-12 23:04:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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) [2021-11-12 23:04:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-12 23:04:34,718 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2021-11-12 23:04:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:34,719 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-12 23:04:34,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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) [2021-11-12 23:04:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-12 23:04:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:04:34,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:34,723 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2021-11-12 23:04:34,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:34,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:34,937 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:34,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:34,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1575640870, now seen corresponding path program 6 times [2021-11-12 23:04:34,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:34,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058844785] [2021-11-12 23:04:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:34,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:38,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:38,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058844785] [2021-11-12 23:04:38,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058844785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:38,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891443898] [2021-11-12 23:04:38,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:04:38,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:38,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:38,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:38,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:04:38,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:04:38,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:04:38,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-12 23:04:38,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:38,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:47,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891443898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:47,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960604307] [2021-11-12 23:04:47,693 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:04:47,693 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:04:47,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:04:47,694 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:04:47,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:04:47,720 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,721 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:47,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:04:47,724 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:47,724 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-12 23:04:47,725 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:47,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:04:47,727 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-12 23:04:47,736 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 36=[|v_#valid_30|]} [2021-11-12 23:04:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-12 23:04:47,749 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:47,750 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,750 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:04:47,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:47,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:47,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,789 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 23:04:47,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 42 [2021-11-12 23:04:47,791 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:47,793 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:04:47,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:47,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:47,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:47,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-12 23:04:47,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:47,810 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:04:47,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:47,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:47,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,817 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-11-12 23:04:47,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:47,819 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:169, output treesize:136 [2021-11-12 23:04:47,828 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-12 23:04:47,830 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:47,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-12 23:04:47,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-11-12 23:04:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-11-12 23:04:47,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:47,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:47,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:47,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:47,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 160 [2021-11-12 23:04:47,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:47,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:166, output treesize:160 [2021-11-12 23:04:47,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:47,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:47,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:47,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,908 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:47,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 296 [2021-11-12 23:04:47,919 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:47,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,924 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:47,924 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,925 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-12 23:04:47,926 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:47,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,927 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-12 23:04:47,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 356 [2021-11-12 23:04:47,930 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:47,933 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 325 [2021-11-12 23:04:47,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 384 [2021-11-12 23:04:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:47,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 79 [2021-11-12 23:04:47,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-12 23:04:47,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:47,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-12 23:04:47,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:48,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:48,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-11-12 23:04:48,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:48,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:48,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:48,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-12 23:04:48,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:48,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:48,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:48,043 INFO L180 QuantifierPusher]: treesize reduction 94, result has 79.2 percent of original size [2021-11-12 23:04:48,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2021-11-12 23:04:48,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-12 23:04:48,049 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:466, output treesize:358 [2021-11-12 23:04:48,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:48,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:48,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:48,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:48,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:48,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:48,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:48,093 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-11-12 23:04:48,095 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:04:48,095 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:48,096 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-12 23:04:48,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-12 23:04:48,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:48,110 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-12 23:04:48,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-12 23:04:48,111 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:48,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:48,112 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:48,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:04:48,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:04:48,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:04:48,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:48,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:04:48,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-11-12 23:04:48,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:04:48,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-11-12 23:04:48,126 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:04:48,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:04:48,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:04:48,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-12 23:04:48,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430438939] [2021-11-12 23:04:48,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:04:48,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-12 23:04:48,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:48,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-12 23:04:48,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-12 23:04:48,610 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 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) [2021-11-12 23:04:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:49,201 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2021-11-12 23:04:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-12 23:04:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 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 98 [2021-11-12 23:04:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:49,210 INFO L225 Difference]: With dead ends: 198 [2021-11-12 23:04:49,210 INFO L226 Difference]: Without dead ends: 195 [2021-11-12 23:04:49,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-12 23:04:49,215 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.72ms SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 210.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:49,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 300 Unknown, 0 Unchecked, 4.72ms Time], IncrementalHoareTripleChecker [100 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 210.72ms Time] [2021-11-12 23:04:49,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-12 23:04:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-12 23:04:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 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) [2021-11-12 23:04:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-11-12 23:04:49,259 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2021-11-12 23:04:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:49,262 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-11-12 23:04:49,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 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) [2021-11-12 23:04:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-11-12 23:04:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 23:04:49,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:49,277 INFO L514 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2021-11-12 23:04:49,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:49,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:49,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:49,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1544332582, now seen corresponding path program 7 times [2021-11-12 23:04:49,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:49,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619164970] [2021-11-12 23:04:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:49,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:05:01,831 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:05:01,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619164970] [2021-11-12 23:05:01,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619164970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:05:01,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830981603] [2021-11-12 23:05:01,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:05:01,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:01,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:01,835 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:05:01,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:05:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:02,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-12 23:05:02,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:05:02,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:05:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830981603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:05:38,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1274065540] [2021-11-12 23:05:38,206 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:05:38,206 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:05:38,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:05:38,207 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:05:38,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:05:38,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,217 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:38,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:05:38,218 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:38,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-12 23:05:38,219 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:38,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:05:38,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-12 23:05:38,224 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_19|], 36=[|v_#valid_31|]} [2021-11-12 23:05:38,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-12 23:05:38,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:38,239 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:38,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:38,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,283 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 23:05:38,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 42 [2021-11-12 23:05:38,284 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:05:38,288 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,288 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-12 23:05:38,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:38,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:05:38,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-12 23:05:38,303 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:05:38,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,304 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 23:05:38,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:38,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,335 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,336 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-11-12 23:05:38,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:05:38,337 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:169, output treesize:136 [2021-11-12 23:05:38,340 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-11-12 23:05:38,342 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:38,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-12 23:05:38,344 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 156 [2021-11-12 23:05:38,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2021-11-12 23:05:38,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:05:38,357 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 23:05:38,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:38,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,363 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,365 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-12 23:05:38,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:05:38,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:154, output treesize:143 [2021-11-12 23:05:38,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,406 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,410 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:38,413 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 281 [2021-11-12 23:05:38,420 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:38,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,424 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:38,424 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,425 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-12 23:05:38,425 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:38,426 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,426 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-11-12 23:05:38,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 341 [2021-11-12 23:05:38,430 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:38,432 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,435 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-11-12 23:05:38,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 369 [2021-11-12 23:05:38,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-11-12 23:05:38,465 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:05:38,467 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:05:38,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:38,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:38,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 62 [2021-11-12 23:05:38,480 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-12 23:05:38,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-12 23:05:38,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:38,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,514 INFO L180 QuantifierPusher]: treesize reduction 94, result has 78.4 percent of original size [2021-11-12 23:05:38,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 341 [2021-11-12 23:05:38,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-12 23:05:38,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:451, output treesize:341 [2021-11-12 23:05:38,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,559 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-11-12 23:05:38,561 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:38,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-12 23:05:38,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-12 23:05:38,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:05:38,575 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-12 23:05:38,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-12 23:05:38,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:05:38,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:05:38,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:38,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:38,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:38,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-11-12 23:05:38,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:05:38,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2021-11-12 23:05:38,589 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:05:39,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:05:39,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:05:39,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-12 23:05:39,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684594510] [2021-11-12 23:05:39,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:05:39,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-12 23:05:39,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:05:39,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-12 23:05:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2021-11-12 23:05:39,238 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 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) [2021-11-12 23:05:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:41,049 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2021-11-12 23:05:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-12 23:05:41,050 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 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 194 [2021-11-12 23:05:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:41,053 INFO L225 Difference]: With dead ends: 390 [2021-11-12 23:05:41,054 INFO L226 Difference]: Without dead ends: 387 [2021-11-12 23:05:41,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2021-11-12 23:05:41,109 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.83ms SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 326.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:41,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 593 Unknown, 0 Unchecked, 6.83ms Time], IncrementalHoareTripleChecker [200 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 326.83ms Time] [2021-11-12 23:05:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-12 23:05:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-11-12 23:05:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 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) [2021-11-12 23:05:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2021-11-12 23:05:41,141 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2021-11-12 23:05:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:41,141 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2021-11-12 23:05:41,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 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) [2021-11-12 23:05:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2021-11-12 23:05:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-12 23:05:41,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:41,151 INFO L514 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2021-11-12 23:05:41,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:41,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-12 23:05:41,378 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1191628506, now seen corresponding path program 8 times [2021-11-12 23:05:41,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:05:41,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573109970] [2021-11-12 23:05:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:41,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:05:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:29,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:29,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573109970] [2021-11-12 23:06:29,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573109970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:29,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263719761] [2021-11-12 23:06:29,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:06:29,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:29,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:29,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:29,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_538d2fee-a727-49c6-982f-a367033b83b6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process