./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI --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 b312eb4f8caa7cb61d3a06c0594e4f86d10948be ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:26:10,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:10,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:10,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:10,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:10,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:10,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:10,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:10,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:10,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:10,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:10,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:10,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:10,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:10,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:10,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:10,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:10,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:10,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:10,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:10,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:10,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:10,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:10,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:10,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:10,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:10,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:10,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:10,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:10,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:10,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:10,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:10,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:10,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:10,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:10,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:10,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:10,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:10,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:10,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:10,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:10,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:26:10,621 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:10,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:10,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:10,624 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:10,624 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:10,624 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:10,625 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:26:10,625 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:10,625 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:10,625 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:26:10,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:26:10,627 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:10,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:26:10,628 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:26:10,628 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:26:10,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:10,629 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:10,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:26:10,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:10,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:10,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:10,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:10,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:10,631 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:10,631 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:10,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:10,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:10,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:10,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:10,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:10,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:10,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:10,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:10,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:10,634 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:26:10,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:26:10,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:10,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:10,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:10,635 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_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b312eb4f8caa7cb61d3a06c0594e4f86d10948be [2021-10-11 02:26:10,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:10,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:10,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:10,962 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:10,963 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:10,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/loops/string-1.i [2021-10-11 02:26:11,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/data/cbc551af1/ef19efece9c64470a835ab7686a55f8e/FLAG7b8df44c8 [2021-10-11 02:26:11,627 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:11,628 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/sv-benchmarks/c/loops/string-1.i [2021-10-11 02:26:11,636 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/data/cbc551af1/ef19efece9c64470a835ab7686a55f8e/FLAG7b8df44c8 [2021-10-11 02:26:11,975 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/data/cbc551af1/ef19efece9c64470a835ab7686a55f8e [2021-10-11 02:26:11,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:11,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:11,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:11,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:12,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:12,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:11" (1/1) ... [2021-10-11 02:26:12,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa5af0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12, skipping insertion in model container [2021-10-11 02:26:12,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:11" (1/1) ... [2021-10-11 02:26:12,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:12,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:12,227 WARN L226 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_600e9808-1f48-4bfe-a6bf-d850845974a2/sv-benchmarks/c/loops/string-1.i[896,909] [2021-10-11 02:26:12,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:12,269 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:12,288 WARN L226 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_600e9808-1f48-4bfe-a6bf-d850845974a2/sv-benchmarks/c/loops/string-1.i[896,909] [2021-10-11 02:26:12,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:12,345 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:12,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12 WrapperNode [2021-10-11 02:26:12,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:12,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:12,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:12,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:12,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (1/1) ... [2021-10-11 02:26:12,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (1/1) ... [2021-10-11 02:26:12,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:12,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:12,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:12,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:12,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (1/1) ... [2021-10-11 02:26:12,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (1/1) ... [2021-10-11 02:26:12,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (1/1) ... [2021-10-11 02:26:12,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (1/1) ... [2021-10-11 02:26:12,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (1/1) ... [2021-10-11 02:26:12,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (1/1) ... [2021-10-11 02:26:12,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (1/1) ... [2021-10-11 02:26:12,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:12,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:12,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:12,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:12,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:12,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:26:12,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:12,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:26:12,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:12,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:26:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:26:13,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:13,043 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:26:13,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:13 BoogieIcfgContainer [2021-10-11 02:26:13,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:13,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:13,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:13,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:13,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:11" (1/3) ... [2021-10-11 02:26:13,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f59eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:13, skipping insertion in model container [2021-10-11 02:26:13,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:12" (2/3) ... [2021-10-11 02:26:13,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f59eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:13, skipping insertion in model container [2021-10-11 02:26:13,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:13" (3/3) ... [2021-10-11 02:26:13,056 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2021-10-11 02:26:13,079 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:13,093 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:13,125 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:13,155 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:13,155 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:13,156 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:13,156 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:13,156 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:13,156 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:13,157 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:13,157 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:13,179 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-10-11 02:26:13,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:26:13,185 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:13,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:13,186 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:13,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:13,192 INFO L82 PathProgramCache]: Analyzing trace with hash 691571467, now seen corresponding path program 1 times [2021-10-11 02:26:13,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:13,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042915351] [2021-10-11 02:26:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:13,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042915351] [2021-10-11 02:26:13,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:13,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:13,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373504196] [2021-10-11 02:26:13,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:13,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:13,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:13,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:13,406 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-10-11 02:26:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:13,473 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2021-10-11 02:26:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:13,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-10-11 02:26:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:13,486 INFO L225 Difference]: With dead ends: 43 [2021-10-11 02:26:13,486 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 02:26:13,489 INFO L677 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 [2021-10-11 02:26:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 02:26:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-10-11 02:26:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:26:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-10-11 02:26:13,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2021-10-11 02:26:13,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:13,529 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-10-11 02:26:13,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-10-11 02:26:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:26:13,530 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:13,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:13,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:13,531 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2134529921, now seen corresponding path program 1 times [2021-10-11 02:26:13,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:13,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719929510] [2021-10-11 02:26:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:13,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719929510] [2021-10-11 02:26:13,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156491064] [2021-10-11 02:26:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:13,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:26:13,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:13,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:13,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1004360236] [2021-10-11 02:26:13,857 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-11 02:26:13,858 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:13,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:13,868 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:13,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:15,082 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:15,308 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-10-11 02:26:15,427 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-10-11 02:26:15,966 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-10-11 02:26:16,132 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-10-11 02:26:16,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:16,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 17 [2021-10-11 02:26:16,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900737753] [2021-10-11 02:26:16,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:26:16,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:16,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:26:16,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:26:16,138 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 13 states. [2021-10-11 02:26:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:16,335 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2021-10-11 02:26:16,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-11 02:26:16,337 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2021-10-11 02:26:16,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:16,340 INFO L225 Difference]: With dead ends: 33 [2021-10-11 02:26:16,340 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 02:26:16,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:26:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 02:26:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-10-11 02:26:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:26:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-11 02:26:16,358 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2021-10-11 02:26:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:16,359 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-11 02:26:16,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:26:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-11 02:26:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:26:16,372 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:16,372 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:16,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:26:16,600 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:16,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1226915996, now seen corresponding path program 1 times [2021-10-11 02:26:16,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:16,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100875795] [2021-10-11 02:26:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:26:16,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100875795] [2021-10-11 02:26:16,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009250501] [2021-10-11 02:26:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:16,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:26:16,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:26:16,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:26:16,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1409109245] [2021-10-11 02:26:16,745 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-11 02:26:16,745 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:16,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:16,746 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:16,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:17,484 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:17,693 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-10-11 02:26:17,817 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-10-11 02:26:18,195 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-10-11 02:26:18,316 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-10-11 02:26:18,551 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-10-11 02:26:18,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:18,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 3, 3] total 16 [2021-10-11 02:26:18,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053674664] [2021-10-11 02:26:18,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:26:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:26:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:26:18,554 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 12 states. [2021-10-11 02:26:18,825 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-10-11 02:26:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:18,896 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-10-11 02:26:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:26:18,897 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2021-10-11 02:26:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:18,898 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:26:18,898 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:26:18,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:26:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:26:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-10-11 02:26:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:26:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-11 02:26:18,903 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 18 [2021-10-11 02:26:18,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:18,903 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-11 02:26:18,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:26:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-11 02:26:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:26:18,904 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:18,904 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:19,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:19,105 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash -513901446, now seen corresponding path program 1 times [2021-10-11 02:26:19,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:19,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529865475] [2021-10-11 02:26:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:26:19,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529865475] [2021-10-11 02:26:19,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125183518] [2021-10-11 02:26:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:19,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:26:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:26:19,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:26:19,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009308166] [2021-10-11 02:26:19,248 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-11 02:26:19,248 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:19,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:19,249 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:19,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:19,979 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:20,450 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-10-11 02:26:20,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:20,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 3, 3] total 16 [2021-10-11 02:26:20,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116254244] [2021-10-11 02:26:20,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:26:20,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:20,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:26:20,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:26:20,832 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 12 states. [2021-10-11 02:26:21,124 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-10-11 02:26:21,256 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-10-11 02:26:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:21,283 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-10-11 02:26:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:26:21,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2021-10-11 02:26:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:21,284 INFO L225 Difference]: With dead ends: 29 [2021-10-11 02:26:21,284 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:26:21,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-10-11 02:26:21,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:26:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-11 02:26:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:26:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-10-11 02:26:21,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2021-10-11 02:26:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:21,290 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-10-11 02:26:21,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:26:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-10-11 02:26:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 02:26:21,291 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:21,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:21,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:21,520 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:21,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1418887327, now seen corresponding path program 1 times [2021-10-11 02:26:21,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:21,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770298633] [2021-10-11 02:26:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:26:21,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770298633] [2021-10-11 02:26:21,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355428925] [2021-10-11 02:26:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:21,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:26:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:26:21,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:26:21,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283837248] [2021-10-11 02:26:21,658 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-11 02:26:21,658 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:21,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:21,659 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:21,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:22,429 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:22,682 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-10-11 02:26:22,966 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-10-11 02:26:23,264 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-10-11 02:26:23,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:23,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 14 [2021-10-11 02:26:23,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343697575] [2021-10-11 02:26:23,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:26:23,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:26:23,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:26:23,467 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 10 states. [2021-10-11 02:26:23,757 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-10-11 02:26:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:23,807 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-10-11 02:26:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:26:23,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2021-10-11 02:26:23,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:23,809 INFO L225 Difference]: With dead ends: 26 [2021-10-11 02:26:23,809 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:26:23,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:26:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:26:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-10-11 02:26:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:26:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-10-11 02:26:23,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 20 [2021-10-11 02:26:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:23,814 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-10-11 02:26:23,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:26:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-10-11 02:26:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 02:26:23,815 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:23,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:24,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-10-11 02:26:24,028 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:24,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1035910130, now seen corresponding path program 1 times [2021-10-11 02:26:24,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:24,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438203834] [2021-10-11 02:26:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:26:24,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438203834] [2021-10-11 02:26:24,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790373383] [2021-10-11 02:26:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:24,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:26:24,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:26:24,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:26:24,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [745126766] [2021-10-11 02:26:24,182 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-11 02:26:24,183 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:24,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:24,183 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:24,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:25,023 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:25,505 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-10-11 02:26:25,835 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-10-11 02:26:26,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:26,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 14 [2021-10-11 02:26:26,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946477206] [2021-10-11 02:26:26,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:26:26,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:26,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:26:26,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:26:26,079 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 10 states. [2021-10-11 02:26:26,339 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-10-11 02:26:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:26,397 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-10-11 02:26:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:26:26,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2021-10-11 02:26:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:26,398 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:26:26,398 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:26:26,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:26:26,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:26:26,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:26:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:26:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:26:26,400 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-10-11 02:26:26,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:26,400 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:26:26,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:26:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:26:26,401 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:26:26,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-10-11 02:26:26,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:26:26,760 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-10-11 02:26:26,970 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-10-11 02:26:27,109 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-10-11 02:26:27,167 INFO L262 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2021-10-11 02:26:27,168 INFO L265 CegarLoopResult]: At program point L19-2(lines 18 23) the Hoare annotation is: true [2021-10-11 02:26:27,168 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:26:27,168 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2021-10-11 02:26:27,168 INFO L262 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2021-10-11 02:26:27,168 INFO L258 CegarLoopResult]: At program point L37-3(lines 37 38) the Hoare annotation is: (and (= |#t~string1.offset| 0) (<= 0 |#t~string0.base|) (<= 0 ULTIMATE.start_main_~i~0) (<= |ULTIMATE.start_main_~#string_B~0.offset| 0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |#t~string1.base|) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (= ULTIMATE.start_main_~found~0 0) (<= |ULTIMATE.start_main_~#string_A~0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.offset|) (= |#NULL.offset| 0) (= |#t~string0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_A~0.offset|) (<= 0 |#StackHeapBarrier|)) [2021-10-11 02:26:27,168 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:26:27,168 INFO L258 CegarLoopResult]: At program point L33-3(lines 33 34) the Hoare annotation is: (and (= |#t~string1.offset| 0) (<= 0 |#t~string0.base|) (<= 0 ULTIMATE.start_main_~i~0) (<= |ULTIMATE.start_main_~#string_B~0.offset| 0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |#t~string1.base|) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (= ULTIMATE.start_main_~found~0 0) (<= |ULTIMATE.start_main_~#string_A~0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.offset|) (= |#NULL.offset| 0) (= |#t~string0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_A~0.offset|) (<= 0 |#StackHeapBarrier|)) [2021-10-11 02:26:27,168 INFO L262 CegarLoopResult]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2021-10-11 02:26:27,168 INFO L258 CegarLoopResult]: At program point L46-3(lines 46 47) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |#t~string1.base|) (let ((.cse0 (= |#t~string1.offset| 0)) (.cse1 (<= 0 |#t~string0.base|)) (.cse2 (= ULTIMATE.start_main_~found~0 0)) (.cse3 (<= 0 ULTIMATE.start_main_~nc_A~0)) (.cse4 (= |#NULL.base| 0)) (.cse5 (<= 5 ULTIMATE.start_main_~i~0)) (.cse6 (= |#NULL.offset| 0)) (.cse7 (= |ULTIMATE.start_main_~#string_A~0.offset| 0)) (.cse8 (= |#t~string0.offset| 0)) (.cse9 (= |ULTIMATE.start_main_~#string_B~0.offset| 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= ULTIMATE.start_main_~nc_B~0 0) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 (<= 1 ULTIMATE.start_main_~nc_B~0) .cse4 .cse5 .cse6 .cse7 .cse8 .cse9))) (or (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_B~0.base|) (+ |ULTIMATE.start_main_~#string_B~0.offset| 4)) 0) (<= 1 ULTIMATE.start_main_~nc_A~0)) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (<= 0 |#StackHeapBarrier|)) [2021-10-11 02:26:27,169 INFO L262 CegarLoopResult]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2021-10-11 02:26:27,169 INFO L262 CegarLoopResult]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2021-10-11 02:26:27,169 INFO L258 CegarLoopResult]: At program point L42-3(lines 42 43) the Hoare annotation is: (and (<= 0 |#t~string0.base|) (let ((.cse0 (= |#t~string1.offset| 0)) (.cse1 (= ULTIMATE.start_main_~found~0 0)) (.cse2 (= |#NULL.base| 0)) (.cse3 (= |#NULL.offset| 0)) (.cse4 (= |ULTIMATE.start_main_~#string_A~0.offset| 0)) (.cse5 (= |ULTIMATE.start_main_~#string_B~0.offset| 0))) (or (and .cse0 .cse1 .cse2 (<= 1 ULTIMATE.start_main_~nc_A~0) .cse3 .cse4 .cse5) (and .cse0 .cse1 (= ULTIMATE.start_main_~nc_A~0 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_B~0.base|) (+ |ULTIMATE.start_main_~#string_B~0.offset| 4)) 0) .cse2 .cse3 .cse4 .cse5))) (<= 5 ULTIMATE.start_main_~i~0) (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |#t~string1.base|) (= |#t~string0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (<= 0 |#StackHeapBarrier|)) [2021-10-11 02:26:27,169 INFO L265 CegarLoopResult]: At program point L71(lines 28 72) the Hoare annotation is: true [2021-10-11 02:26:27,169 INFO L262 CegarLoopResult]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2021-10-11 02:26:27,169 INFO L258 CegarLoopResult]: At program point L55-2(lines 53 65) the Hoare annotation is: (and (= |#t~string1.offset| 0) (<= 0 |#t~string0.base|) (<= |ULTIMATE.start_main_~#string_B~0.offset| 0) (<= 0 ULTIMATE.start_main_~j~0) (<= 0 ULTIMATE.start_main_~nc_A~0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |#t~string1.base|) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (= ULTIMATE.start_main_~found~0 0) (<= 0 ULTIMATE.start_main_~nc_B~0) (<= |ULTIMATE.start_main_~#string_A~0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.offset|) (= |#NULL.offset| 0) (= |#t~string0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_A~0.offset|) (<= 0 |#StackHeapBarrier|)) [2021-10-11 02:26:27,169 INFO L262 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2021-10-11 02:26:27,169 INFO L262 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2021-10-11 02:26:27,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:27 BoogieIcfgContainer [2021-10-11 02:26:27,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:27,222 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:27,222 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:27,222 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:27,223 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:13" (3/4) ... [2021-10-11 02:26:27,230 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:26:27,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-11 02:26:27,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:26:27,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:26:27,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:26:27,305 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_600e9808-1f48-4bfe-a6bf-d850845974a2/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:26:27,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:27,306 INFO L168 Benchmark]: Toolchain (without parser) took 15326.38 ms. Allocated memory was 107.0 MB in the beginning and 205.5 MB in the end (delta: 98.6 MB). Free memory was 74.9 MB in the beginning and 156.0 MB in the end (delta: -81.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:27,307 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 107.0 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:27,307 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.66 ms. Allocated memory is still 107.0 MB. Free memory was 74.5 MB in the beginning and 81.5 MB in the end (delta: -6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:27,307 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.88 ms. Allocated memory is still 107.0 MB. Free memory was 81.5 MB in the beginning and 79.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:27,308 INFO L168 Benchmark]: Boogie Preprocessor took 46.72 ms. Allocated memory is still 107.0 MB. Free memory was 79.9 MB in the beginning and 78.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:27,308 INFO L168 Benchmark]: RCFGBuilder took 598.64 ms. Allocated memory is still 107.0 MB. Free memory was 78.3 MB in the beginning and 54.7 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:27,309 INFO L168 Benchmark]: TraceAbstraction took 14173.54 ms. Allocated memory was 107.0 MB in the beginning and 205.5 MB in the end (delta: 98.6 MB). Free memory was 54.3 MB in the beginning and 159.1 MB in the end (delta: -104.8 MB). Peak memory consumption was 93.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:27,310 INFO L168 Benchmark]: Witness Printer took 83.26 ms. Allocated memory is still 205.5 MB. Free memory was 159.1 MB in the beginning and 156.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:27,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 107.0 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 351.66 ms. Allocated memory is still 107.0 MB. Free memory was 74.5 MB in the beginning and 81.5 MB in the end (delta: -6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.88 ms. Allocated memory is still 107.0 MB. Free memory was 81.5 MB in the beginning and 79.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.72 ms. Allocated memory is still 107.0 MB. Free memory was 79.9 MB in the beginning and 78.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 598.64 ms. Allocated memory is still 107.0 MB. Free memory was 78.3 MB in the beginning and 54.7 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14173.54 ms. Allocated memory was 107.0 MB in the beginning and 205.5 MB in the end (delta: 98.6 MB). Free memory was 54.3 MB in the beginning and 159.1 MB in the end (delta: -104.8 MB). Peak memory consumption was 93.9 MB. Max. memory is 16.1 GB. * Witness Printer took 83.26 ms. Allocated memory is still 205.5 MB. Free memory was 159.1 MB in the beginning and 156.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: ((((((((((((((("string-1.c" == 0 && 0 <= "0") && string_B <= 0) && 0 <= j) && 0 <= nc_A) && #NULL == 0) && 0 <= string_B) && 0 <= "string-1.c") && 0 <= string_A) && found == 0) && 0 <= nc_B) && string_A <= 0) && 0 <= string_B) && #NULL == 0) && "0" == 0) && 0 <= string_A) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((((0 <= string_B && 0 <= "string-1.c") && ((((((((((("string-1.c" == 0 && 0 <= "0") && found == 0) && 0 <= nc_A) && #NULL == 0) && 5 <= i) && #NULL == 0) && nc_B == 0) && string_A == 0) && "0" == 0) && string_B == 0) || (((((((((("string-1.c" == 0 && 0 <= "0") && found == 0) && 0 <= nc_A) && 1 <= nc_B) && #NULL == 0) && 5 <= i) && #NULL == 0) && string_A == 0) && "0" == 0) && string_B == 0))) && (unknown-#memory_int-unknown[string_B][string_B + 4] == 0 || 1 <= nc_A)) && 0 <= string_A) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((0 <= "0" && ((((((("string-1.c" == 0 && found == 0) && #NULL == 0) && 1 <= nc_A) && #NULL == 0) && string_A == 0) && string_B == 0) || ((((((("string-1.c" == 0 && found == 0) && nc_A == 0) && unknown-#memory_int-unknown[string_B][string_B + 4] == 0) && #NULL == 0) && #NULL == 0) && string_A == 0) && string_B == 0))) && 5 <= i) && 0 <= string_B) && 0 <= "string-1.c") && "0" == 0) && 0 <= string_A) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((((((((("string-1.c" == 0 && 0 <= "0") && 0 <= i) && string_B <= 0) && #NULL == 0) && 0 <= string_B) && 0 <= "string-1.c") && 0 <= string_A) && found == 0) && string_A <= 0) && 0 <= string_B) && #NULL == 0) && "0" == 0) && 0 <= string_A) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((((((((((("string-1.c" == 0 && 0 <= "0") && 0 <= i) && string_B <= 0) && #NULL == 0) && 0 <= string_B) && 0 <= "string-1.c") && 0 <= string_A) && found == 0) && string_A <= 0) && 0 <= string_B) && #NULL == 0) && "0" == 0) && 0 <= string_A) && 0 <= unknown-#StackHeapBarrier-unknown - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.4s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 90 SDslu, 86 SDs, 0 SdLazy, 493 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 293 GetRequests, 203 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 25 NumberOfFragments, 317 HoareAnnotationTreeSize, 7 FomulaSimplifications, 601 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 681 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 198 NumberOfCodeBlocks, 198 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 275 ConstructedInterpolants, 0 QuantifiedInterpolants, 5891 SizeOfPredicates, 0 NumberOfNonLiveVariables, 493 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 54/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 4309, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 70, DAG_INTERPRETER_EARLY_EXITS: 5, TOOLS_POST_APPLICATIONS: 140, TOOLS_POST_TIME[ms]: 2459, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 140, TOOLS_QUANTIFIERELIM_TIME[ms]: 2415, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 290, FLUID_QUERY_TIME[ms]: 16, FLUID_QUERIES: 329, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 186, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 34, DOMAIN_WIDEN_TIME[ms]: 1359, DOMAIN_ISSUBSETEQ_APPLICATIONS: 51, DOMAIN_ISSUBSETEQ_TIME[ms]: 110, DOMAIN_ISBOTTOM_APPLICATIONS: 70, DOMAIN_ISBOTTOM_TIME[ms]: 65, LOOP_SUMMARIZER_APPLICATIONS: 17, LOOP_SUMMARIZER_CACHE_MISSES: 17, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 3243, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 3242, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 51, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 3, PATH_EXPR_TIME[ms]: 6, REGEX_TO_DAG_TIME[ms]: 5, DAG_COMPRESSION_TIME[ms]: 30, DAG_COMPRESSION_PROCESSED_NODES: 950, DAG_COMPRESSION_RETAINED_NODES: 228, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...