./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c --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_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/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_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/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_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/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 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:05:14,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:05:14,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:05:14,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:05:14,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:05:14,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:05:14,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:05:14,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:05:14,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:05:14,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:05:14,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:05:14,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:05:14,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:05:14,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:05:14,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:05:14,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:05:14,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:05:14,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:05:14,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:05:14,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:05:14,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:05:14,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:05:14,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:05:14,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:05:14,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:05:14,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:05:14,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:05:14,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:05:14,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:05:14,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:05:14,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:05:14,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:05:14,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:05:14,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:05:14,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:05:14,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:05:14,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:05:14,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:05:14,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:05:14,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:05:14,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:05:14,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:05:14,379 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:05:14,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:05:14,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:05:14,382 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:05:14,382 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:05:14,383 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:05:14,383 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:05:14,383 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:05:14,383 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:05:14,384 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:05:14,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:05:14,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:05:14,385 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:05:14,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:05:14,386 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:05:14,386 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:05:14,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:05:14,387 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:05:14,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:05:14,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:05:14,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:05:14,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:05:14,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:05:14,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:05:14,389 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:05:14,389 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:05:14,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:05:14,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:05:14,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:05:14,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:05:14,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:05:14,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:05:14,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:05:14,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:05:14,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:05:14,394 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:05:14,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:05:14,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:05:14,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:05:14,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:05:14,395 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_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e [2021-11-12 23:05:14,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:05:14,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:05:14,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:05:14,692 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:05:14,693 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:05:14,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2021-11-12 23:05:14,792 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/data/3650eb276/c9d3bed741d84f77a390d3e6ad83758a/FLAG1c829093d [2021-11-12 23:05:15,239 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:05:15,239 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2021-11-12 23:05:15,246 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/data/3650eb276/c9d3bed741d84f77a390d3e6ad83758a/FLAG1c829093d [2021-11-12 23:05:15,632 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/data/3650eb276/c9d3bed741d84f77a390d3e6ad83758a [2021-11-12 23:05:15,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:05:15,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:05:15,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:05:15,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:05:15,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:05:15,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3293a715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15, skipping insertion in model container [2021-11-12 23:05:15,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:05:15,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:05:15,860 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_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/sv-benchmarks/c/loops-crafted-1/Mono4_1.c[311,324] [2021-11-12 23:05:15,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:05:15,883 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:05:15,902 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_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/sv-benchmarks/c/loops-crafted-1/Mono4_1.c[311,324] [2021-11-12 23:05:15,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:05:15,919 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:05:15,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15 WrapperNode [2021-11-12 23:05:15,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:05:15,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:05:15,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:05:15,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:05:15,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:05:15,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:05:15,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:05:15,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:05:15,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:05:15,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:05:15,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:05:15,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:05:15,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (1/1) ... [2021-11-12 23:05:15,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:05:16,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:16,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:05:16,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:05:16,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:05:16,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:05:16,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:05:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:05:16,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:05:16,271 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:05:16,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:05:16 BoogieIcfgContainer [2021-11-12 23:05:16,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:05:16,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:05:16,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:05:16,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:05:16,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:05:15" (1/3) ... [2021-11-12 23:05:16,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc2a83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:05:16, skipping insertion in model container [2021-11-12 23:05:16,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:15" (2/3) ... [2021-11-12 23:05:16,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc2a83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:05:16, skipping insertion in model container [2021-11-12 23:05:16,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:05:16" (3/3) ... [2021-11-12 23:05:16,283 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2021-11-12 23:05:16,288 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:05:16,289 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:05:16,337 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:05:16,345 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 23:05:16,345 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:05:16,359 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 23:05:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:05:16,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:16,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:05:16,365 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:16,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2034246, now seen corresponding path program 1 times [2021-11-12 23:05:16,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:05:16,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591405422] [2021-11-12 23:05:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:16,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:05:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:16,583 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 23:05:16,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:05:16,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591405422] [2021-11-12 23:05:16,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591405422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:16,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:05:16,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:05:16,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166441140] [2021-11-12 23:05:16,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:16,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:05:16,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:05:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:05:16,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:05:16,671 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 23:05:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:16,731 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-12 23:05:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:05:16,733 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 23:05:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:16,746 INFO L225 Difference]: With dead ends: 13 [2021-11-12 23:05:16,746 INFO L226 Difference]: Without dead ends: 6 [2021-11-12 23:05:16,748 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 23:05:16,752 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:16,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 43.24ms Time] [2021-11-12 23:05:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-12 23:05:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-12 23:05:16,791 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 23:05:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-12 23:05:16,793 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-12 23:05:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:16,793 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-12 23:05:16,794 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 23:05:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-12 23:05:16,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 23:05:16,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:16,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 23:05:16,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:05:16,795 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:16,804 INFO L85 PathProgramCache]: Analyzing trace with hash 63135587, now seen corresponding path program 1 times [2021-11-12 23:05:16,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:05:16,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670208161] [2021-11-12 23:05:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:16,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:05:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:16,891 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 23:05:16,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:05:16,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670208161] [2021-11-12 23:05:16,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670208161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:05:16,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420837343] [2021-11-12 23:05:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:16,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:16,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:16,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:05:16,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:05:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:16,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:05:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:17,005 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 23:05:17,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:17,160 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 23:05:17,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420837343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:05:17,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887801195] [2021-11-12 23:05:17,197 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:05:17,197 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:05:17,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:05:17,212 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:05:17,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:05:17,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,257 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:17,258 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,259 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:17,261 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:17,263 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:05:17,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:05:17,296 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-12 23:05:17,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:05:17,321 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:05:17,322 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,323 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:05:17,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:17,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:17,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:05:17,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:17,379 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:17,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:17,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,407 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:05:17,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:05:17,417 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:05:17,425 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-12 23:05:17,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:05:17,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,620 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:17,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 426 [2021-11-12 23:05:17,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 468 [2021-11-12 23:05:17,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,800 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-11-12 23:05:17,804 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:17,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:05:17,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:05:17,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:17,893 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-12 23:05:17,896 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:17,901 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:17,910 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:05:17,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:17,933 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:05:18,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:05:18,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:05:18,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-12 23:05:18,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892701067] [2021-11-12 23:05:18,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:05:18,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:05:18,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:05:18,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:05:18,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:05:18,204 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 23:05:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:18,224 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-12 23:05:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:05:18,225 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 23:05:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:18,226 INFO L225 Difference]: With dead ends: 12 [2021-11-12 23:05:18,226 INFO L226 Difference]: Without dead ends: 9 [2021-11-12 23:05:18,226 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 23:05:18,228 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:18,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 13.44ms Time] [2021-11-12 23:05:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-12 23:05:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-12 23:05:18,234 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 23:05:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-12 23:05:18,235 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-12 23:05:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:18,236 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-12 23:05:18,236 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 23:05:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-12 23:05:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:05:18,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:18,237 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-12 23:05:18,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:18,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:18,464 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash -249960058, now seen corresponding path program 2 times [2021-11-12 23:05:18,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:05:18,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948405895] [2021-11-12 23:05:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:18,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:05:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:18,564 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 23:05:18,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:05:18,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948405895] [2021-11-12 23:05:18,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948405895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:05:18,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348344715] [2021-11-12 23:05:18,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:05:18,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:18,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:18,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:05:18,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:05:18,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 23:05:18,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:05:18,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:05:18,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:18,682 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 23:05:18,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:18,894 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 23:05:18,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348344715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:05:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979661623] [2021-11-12 23:05:18,905 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:05:18,905 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:05:18,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:05:18,906 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:05:18,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:05:18,920 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:18,921 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:18,922 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:18,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:18,929 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:18,930 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:18,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:05:18,932 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:05:18,940 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-12 23:05:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:05:18,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:18,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:05:18,963 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:18,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:05:18,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:18,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:18,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:18,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:18,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:05:18,994 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:18,997 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:18,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:18,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:18,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:18,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:19,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:19,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:05:19,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:05:19,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:05:19,010 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-12 23:05:19,013 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:05:19,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:19,065 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:19,067 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:19,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 241 [2021-11-12 23:05:19,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 23:05:19,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,155 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-12 23:05:19,161 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:19,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:19,185 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-12 23:05:19,192 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:19,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:19,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:05:19,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:19,212 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:05:19,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:05:19,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:05:19,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2021-11-12 23:05:19,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669704916] [2021-11-12 23:05:19,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:05:19,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:05:19,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:05:19,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:05:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:05:19,458 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:19,522 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-12 23:05:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:05:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:05:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:19,523 INFO L225 Difference]: With dead ends: 18 [2021-11-12 23:05:19,523 INFO L226 Difference]: Without dead ends: 15 [2021-11-12 23:05:19,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:05:19,525 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.68ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:19,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 35 Unknown, 0 Unchecked, 0.68ms Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 30.54ms Time] [2021-11-12 23:05:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-12 23:05:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-12 23:05:19,529 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 23:05:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-12 23:05:19,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-12 23:05:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:19,530 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-12 23:05:19,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-12 23:05:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:05:19,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:19,531 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-12 23:05:19,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:19,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-12 23:05:19,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1492112282, now seen corresponding path program 3 times [2021-11-12 23:05:19,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:05:19,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792406611] [2021-11-12 23:05:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:19,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:05:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:19,946 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 23:05:19,946 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:05:19,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792406611] [2021-11-12 23:05:19,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792406611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:05:19,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706873872] [2021-11-12 23:05:19,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:05:19,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:19,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:19,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:05:19,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:05:19,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:05:19,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:05:19,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:05:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:20,208 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 23:05:20,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:20,727 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 23:05:20,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706873872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:05:20,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9195531] [2021-11-12 23:05:20,729 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:05:20,730 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:05:20,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:05:20,730 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:05:20,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:05:20,735 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,736 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:20,737 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,737 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:20,738 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:20,738 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:05:20,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:05:20,752 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-12 23:05:20,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:05:20,767 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,768 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:05:20,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:05:20,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:20,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:20,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:05:20,798 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,801 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:20,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:20,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:20,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,808 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:05:20,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:05:20,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:05:20,814 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-12 23:05:20,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:05:20,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,862 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,864 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:20,867 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 201 [2021-11-12 23:05:20,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 23:05:20,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,954 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-12 23:05:20,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:20,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:20,990 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-12 23:05:20,991 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:20,992 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:20,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:05:20,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:21,005 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:05:21,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:05:21,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:05:21,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-11-12 23:05:21,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399304866] [2021-11-12 23:05:21,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:05:21,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-12 23:05:21,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:05:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-12 23:05:21,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=943, Unknown=0, NotChecked=0, Total=1482 [2021-11-12 23:05:21,249 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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 23:05:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:21,351 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-12 23:05:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:05:21,351 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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 23:05:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:21,352 INFO L225 Difference]: With dead ends: 30 [2021-11-12 23:05:21,352 INFO L226 Difference]: Without dead ends: 27 [2021-11-12 23:05:21,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1051, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 23:05:21,354 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:21,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 57 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 44.24ms Time] [2021-11-12 23:05:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-12 23:05:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-12 23:05:21,359 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 23:05:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-12 23:05:21,359 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-12 23:05:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:21,360 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-12 23:05:21,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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 23:05:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-12 23:05:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 23:05:21,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:21,361 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-12 23:05:21,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:21,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:21,588 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:21,588 INFO L85 PathProgramCache]: Analyzing trace with hash 545896998, now seen corresponding path program 4 times [2021-11-12 23:05:21,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:05:21,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265535126] [2021-11-12 23:05:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:21,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:05:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:22,104 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 23:05:22,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:05:22,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265535126] [2021-11-12 23:05:22,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265535126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:05:22,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166575658] [2021-11-12 23:05:22,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:05:22,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:22,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:22,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:05:22,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:05:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:22,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 23:05:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:22,899 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 23:05:22,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:24,575 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 23:05:24,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166575658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:05:24,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [519905585] [2021-11-12 23:05:24,578 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:05:24,578 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:05:24,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:05:24,578 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:05:24,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:05:24,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,585 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:24,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:05:24,593 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:24,595 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:24,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:05:24,599 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-12 23:05:24,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:05:24,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,610 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:05:24,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,611 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:05:24,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:24,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:24,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:05:24,632 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:24,635 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,635 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:24,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:24,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,640 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,641 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:05:24,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:05:24,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:05:24,645 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-12 23:05:24,647 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:05:24,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,684 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:24,686 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 201 [2021-11-12 23:05:24,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 23:05:24,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,737 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-12 23:05:24,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:24,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:24,758 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-12 23:05:24,759 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:24,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:24,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:05:24,764 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:24,769 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:05:25,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:05:25,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:05:25,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 71 [2021-11-12 23:05:25,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075058199] [2021-11-12 23:05:25,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:05:25,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-12 23:05:25,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:05:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-12 23:05:25,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=3331, Unknown=0, NotChecked=0, Total=5550 [2021-11-12 23:05:25,079 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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 23:05:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:25,281 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-12 23:05:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 23:05:25,284 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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 23:05:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:25,285 INFO L225 Difference]: With dead ends: 54 [2021-11-12 23:05:25,286 INFO L226 Difference]: Without dead ends: 51 [2021-11-12 23:05:25,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2317, Invalid=3535, Unknown=0, NotChecked=0, Total=5852 [2021-11-12 23:05:25,290 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.38ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:25,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 98 Unknown, 0 Unchecked, 2.38ms Time], IncrementalHoareTripleChecker [26 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 81.73ms Time] [2021-11-12 23:05:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-12 23:05:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-12 23:05:25,304 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 23:05:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-12 23:05:25,308 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-12 23:05:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:25,308 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-12 23:05:25,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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 23:05:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-12 23:05:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-12 23:05:25,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:25,312 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2021-11-12 23:05:25,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:25,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-12 23:05:25,528 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash -696715866, now seen corresponding path program 5 times [2021-11-12 23:05:25,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:05:25,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199087627] [2021-11-12 23:05:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:25,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:05:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:27,112 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 23:05:27,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:05:27,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199087627] [2021-11-12 23:05:27,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199087627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:05:27,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600168347] [2021-11-12 23:05:27,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:05:27,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:27,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:27,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:05:27,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:05:27,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-12 23:05:27,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:05:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-12 23:05:27,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:29,484 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 23:05:29,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:34,178 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 23:05:34,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600168347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:05:34,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115644798] [2021-11-12 23:05:34,181 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:05:34,181 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:05:34,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:05:34,182 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:05:34,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:05:34,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,197 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:34,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:34,198 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:34,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:05:34,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:05:34,203 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-12 23:05:34,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:05:34,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:05:34,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:05:34,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:34,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:05:34,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:05:34,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:34,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:05:34,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:05:34,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:05:34,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:05:34,255 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:05:34,258 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-12 23:05:34,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:05:34,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,297 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,299 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:34,301 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 421 [2021-11-12 23:05:34,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 472 [2021-11-12 23:05:34,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,401 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-11-12 23:05:34,403 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:34,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:05:34,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:05:34,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:05:34,429 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-12 23:05:34,430 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:05:34,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:05:34,433 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:05:34,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:05:34,439 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:05:34,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:05:34,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:05:34,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 143 [2021-11-12 23:05:34,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763314444] [2021-11-12 23:05:34,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:05:34,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-11-12 23:05:34,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:05:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-11-12 23:05:34,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9035, Invalid=12427, Unknown=0, NotChecked=0, Total=21462 [2021-11-12 23:05:34,772 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 144 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 143 states have internal predecessors, (147), 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 23:05:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:35,116 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2021-11-12 23:05:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-12 23:05:35,116 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 143 states have internal predecessors, (147), 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 23:05:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:35,118 INFO L225 Difference]: With dead ends: 102 [2021-11-12 23:05:35,118 INFO L226 Difference]: Without dead ends: 99 [2021-11-12 23:05:35,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=9229, Invalid=12823, Unknown=0, NotChecked=0, Total=22052 [2021-11-12 23:05:35,126 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:35,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 185 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [52 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 137.40ms Time] [2021-11-12 23:05:35,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-12 23:05:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-12 23:05:35,137 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 23:05:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-12 23:05:35,139 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2021-11-12 23:05:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:35,139 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-12 23:05:35,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 143 states have internal predecessors, (147), 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 23:05:35,140 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-12 23:05:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:05:35,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:35,144 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2021-11-12 23:05:35,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:35,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-12 23:05:35,364 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1601704794, now seen corresponding path program 6 times [2021-11-12 23:05:35,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:05:35,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708546552] [2021-11-12 23:05:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:35,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:05:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:39,439 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 23:05:39,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:05:39,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708546552] [2021-11-12 23:05:39,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708546552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:05:39,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988886008] [2021-11-12 23:05:39,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:05:39,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:39,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:39,441 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:05:39,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:05:39,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:05:39,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:05:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-12 23:05:39,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:47,624 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 23:05:47,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:04,477 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 23:06:04,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988886008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:04,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546819707] [2021-11-12 23:06:04,479 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:06:04,479 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:04,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:04,480 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:04,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:04,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,488 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:06:04,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:06:04,488 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:06:04,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:06:04,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:06:04,493 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-12 23:06:04,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:06:04,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:06:04,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:06:04,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:06:04,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:06:04,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:06:04,541 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,542 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:06:04,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:06:04,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:06:04,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,550 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:06:04,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:06:04,552 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:06:04,554 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-12 23:06:04,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:06:04,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,590 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:06:04,592 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,603 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 426 [2021-11-12 23:06:04,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 468 [2021-11-12 23:06:04,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,668 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-11-12 23:06:04,669 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:06:04,669 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,671 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:06:04,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:06:04,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:04,693 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-12 23:06:04,694 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:06:04,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:04,697 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:04,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:06:04,703 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:05,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:05,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:05,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 287 [2021-11-12 23:06:05,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843244146] [2021-11-12 23:06:05,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:05,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 288 states [2021-11-12 23:06:05,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 288 interpolants. [2021-11-12 23:06:05,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36491, Invalid=47899, Unknown=0, NotChecked=0, Total=84390 [2021-11-12 23:06:05,366 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 288 states, 288 states have (on average 1.0104166666666667) internal successors, (291), 287 states have internal predecessors, (291), 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 23:06:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:06,415 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2021-11-12 23:06:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-12 23:06:06,416 INFO L78 Accepts]: Start accepts. Automaton has has 288 states, 288 states have (on average 1.0104166666666667) internal successors, (291), 287 states have internal predecessors, (291), 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 23:06:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:06,419 INFO L225 Difference]: With dead ends: 198 [2021-11-12 23:06:06,419 INFO L226 Difference]: Without dead ends: 195 [2021-11-12 23:06:06,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5602 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=36877, Invalid=48679, Unknown=0, NotChecked=0, Total=85556 [2021-11-12 23:06:06,425 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.29ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 205.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:06,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 360 Unknown, 0 Unchecked, 4.29ms Time], IncrementalHoareTripleChecker [104 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 205.49ms Time] [2021-11-12 23:06:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-12 23:06:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-12 23:06:06,443 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 23:06:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-11-12 23:06:06,446 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2021-11-12 23:06:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:06,447 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-11-12 23:06:06,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 288 states, 288 states have (on average 1.0104166666666667) internal successors, (291), 287 states have internal predecessors, (291), 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 23:06:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-11-12 23:06:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 23:06:06,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:06,457 INFO L514 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2021-11-12 23:06:06,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:06,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:06,660 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash -9971034, now seen corresponding path program 7 times [2021-11-12 23:06:06,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:06,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24020676] [2021-11-12 23:06:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:06,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:21,527 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 23:06:21,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:21,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24020676] [2021-11-12 23:06:21,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24020676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:21,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085696291] [2021-11-12 23:06:21,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:06:21,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:21,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:21,528 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:21,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:06:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:21,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-12 23:06:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:52,105 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 23:06:52,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:54,589 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 23:07:54,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085696291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:07:54,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [185490600] [2021-11-12 23:07:54,592 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:07:54,592 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:07:54,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:07:54,592 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:07:54,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:07:54,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,597 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:07:54,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:07:54,597 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:07:54,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:07:54,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:07:54,600 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-11-12 23:07:54,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:07:54,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:07:54,608 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:07:54,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:07:54,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:07:54,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:07:54,635 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:07:54,637 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,637 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:07:54,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:07:54,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:07:54,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:07:54,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:07:54,649 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-12 23:07:54,650 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:07:54,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,697 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:07:54,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 201 [2021-11-12 23:07:54,787 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 23:07:54,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,823 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-12 23:07:54,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:07:54,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:54,842 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-12 23:07:54,843 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:07:54,848 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:07:54,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:07:54,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:07:54,856 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:07:55,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:07:55,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:07:55,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 192, 192] total 575 [2021-11-12 23:07:55,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724225548] [2021-11-12 23:07:55,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:07:55,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 576 states [2021-11-12 23:07:55,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:55,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 576 interpolants. [2021-11-12 23:07:55,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146699, Invalid=187963, Unknown=0, NotChecked=0, Total=334662 [2021-11-12 23:07:55,733 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 576 states, 576 states have (on average 1.0052083333333333) internal successors, (579), 575 states have internal predecessors, (579), 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 23:07:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:59,104 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2021-11-12 23:07:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-12 23:07:59,117 INFO L78 Accepts]: Start accepts. Automaton has has 576 states, 576 states have (on average 1.0052083333333333) internal successors, (579), 575 states have internal predecessors, (579), 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 23:07:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:59,120 INFO L225 Difference]: With dead ends: 390 [2021-11-12 23:07:59,120 INFO L226 Difference]: Without dead ends: 387 [2021-11-12 23:07:59,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 579 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20434 ImplicationChecksByTransitivity, 103.1s TimeCoverageRelationStatistics Valid=147469, Invalid=189511, Unknown=0, NotChecked=0, Total=336980 [2021-11-12 23:07:59,137 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.84ms SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 389.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:59,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 698 Unknown, 0 Unchecked, 7.84ms Time], IncrementalHoareTripleChecker [199 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 389.48ms Time] [2021-11-12 23:07:59,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-12 23:07:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-11-12 23:07:59,167 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 23:07:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2021-11-12 23:07:59,172 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2021-11-12 23:07:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:59,173 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2021-11-12 23:07:59,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 576 states, 576 states have (on average 1.0052083333333333) internal successors, (579), 575 states have internal predecessors, (579), 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 23:07:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2021-11-12 23:07:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-12 23:07:59,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:59,184 INFO L514 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2021-11-12 23:07:59,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:59,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-11-12 23:07:59,399 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2016392870, now seen corresponding path program 8 times [2021-11-12 23:07:59,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:59,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885970880] [2021-11-12 23:07:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:59,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:56,701 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 23:08:56,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:56,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885970880] [2021-11-12 23:08:56,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885970880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:56,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401770517] [2021-11-12 23:08:56,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:08:56,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:56,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:56,714 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:56,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 23:09:03,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2021-11-12 23:09:03,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:09:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-12 23:09:03,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:06,357 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 23:11:06,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:19,002 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 23:15:19,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401770517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:15:19,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002748989] [2021-11-12 23:15:19,005 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 23:15:19,005 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:15:19,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:15:19,005 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:15:19,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:15:19,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,012 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:15:19,013 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,013 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:15:19,013 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:15:19,013 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:15:19,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 23:15:19,016 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-11-12 23:15:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:15:19,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:15:19,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,025 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:15:19,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:15:19,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:19,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:15:19,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:15:19,044 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,044 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:15:19,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:15:19,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,061 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:15:19,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:15:19,062 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-12 23:15:19,065 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-12 23:15:19,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-12 23:15:19,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,093 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,094 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:15:19,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,109 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 421 [2021-11-12 23:15:19,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 472 [2021-11-12 23:15:19,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,166 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-11-12 23:15:19,167 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:15:19,168 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:15:19,171 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-12 23:15:19,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:15:19,188 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-12 23:15:19,189 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:15:19,189 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:15:19,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:15:19,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:15:19,200 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:15:20,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:15:20,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:15:20,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 384, 384] total 1151 [2021-11-12 23:15:20,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442824022] [2021-11-12 23:15:20,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:15:20,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1152 states [2021-11-12 23:15:20,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:15:20,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1152 interpolants. [2021-11-12 23:15:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588299, Invalid=744571, Unknown=0, NotChecked=0, Total=1332870 [2021-11-12 23:15:20,931 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 1152 states, 1152 states have (on average 1.0026041666666667) internal successors, (1155), 1151 states have internal predecessors, (1155), 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 23:15:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:46,481 INFO L93 Difference]: Finished difference Result 774 states and 1157 transitions. [2021-11-12 23:15:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-12 23:15:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 1152 states, 1152 states have (on average 1.0026041666666667) internal successors, (1155), 1151 states have internal predecessors, (1155), 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 386 [2021-11-12 23:15:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:46,489 INFO L225 Difference]: With dead ends: 774 [2021-11-12 23:15:46,489 INFO L226 Difference]: Without dead ends: 771 [2021-11-12 23:15:46,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1543 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 1155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77746 ImplicationChecksByTransitivity, 423.0s TimeCoverageRelationStatistics Valid=589837, Invalid=747655, Unknown=0, NotChecked=0, Total=1337492 [2021-11-12 23:15:46,591 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 620.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.54ms SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 853.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:46,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 1378 Unknown, 0 Unchecked, 15.54ms Time], IncrementalHoareTripleChecker [391 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 853.45ms Time] [2021-11-12 23:15:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-11-12 23:15:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2021-11-12 23:15:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 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 23:15:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2021-11-12 23:15:46,635 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2021-11-12 23:15:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:46,636 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2021-11-12 23:15:46,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 1152 states, 1152 states have (on average 1.0026041666666667) internal successors, (1155), 1151 states have internal predecessors, (1155), 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 23:15:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2021-11-12 23:15:46,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-11-12 23:15:46,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:46,664 INFO L514 BasicCegarLoop]: trace histogram [766, 1, 1, 1, 1] [2021-11-12 23:15:46,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-12 23:15:46,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e2e4a6a-77f8-49d2-851e-a4360eeb6fd1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-11-12 23:15:46,879 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash -706777434, now seen corresponding path program 9 times [2021-11-12 23:15:46,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:15:46,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467753322] [2021-11-12 23:15:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:46,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:15:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat