./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp2.c --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_a45a2b17-1bf4-4a56-9952-69a054d77ff8/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/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_a45a2b17-1bf4-4a56-9952-69a054d77ff8/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/indp2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/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_a45a2b17-1bf4-4a56-9952-69a054d77ff8/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 c50b40cd11bc256173e14037b4ee99385e99b290 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 02:33:08,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:33:08,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:33:08,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:33:08,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:33:08,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:33:08,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:33:08,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:33:08,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:33:08,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:33:08,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:33:08,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:33:08,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:33:08,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:33:08,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:33:08,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:33:08,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:33:08,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:33:08,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:33:08,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:33:08,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:33:08,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:33:08,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:33:08,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:33:08,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:33:08,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:33:08,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:33:08,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:33:08,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:33:08,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:33:08,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:33:08,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:33:08,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:33:08,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:33:08,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:33:08,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:33:08,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:33:08,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:33:08,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:33:08,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:33:08,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:33:08,551 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:33:08,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:33:08,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:33:08,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:33:08,577 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:33:08,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:33:08,578 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:33:08,578 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:33:08,579 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:33:08,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:33:08,579 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:33:08,579 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:33:08,579 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:33:08,580 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:33:08,580 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:33:08,580 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:33:08,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:33:08,581 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:33:08,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:33:08,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:33:08,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:33:08,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:33:08,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:33:08,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:33:08,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:33:08,583 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:33:08,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:33:08,584 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:33:08,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:33:08,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:33:08,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:33:08,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:08,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:33:08,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:33:08,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:33:08,586 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:33:08,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:33:08,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:33:08,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:33:08,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:33:08,587 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_a45a2b17-1bf4-4a56-9952-69a054d77ff8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c50b40cd11bc256173e14037b4ee99385e99b290 [2021-10-11 02:33:08,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:33:08,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:33:08,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:33:08,893 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:33:08,894 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:33:08,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/indp2.c [2021-10-11 02:33:08,997 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/bin/utaipan-WLngWcDbfI/data/55e30ec5c/c0c89b1888b44699aff754a0665276af/FLAG05eb0aac4 [2021-10-11 02:33:09,490 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:33:09,491 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/sv-benchmarks/c/array-fpi/indp2.c [2021-10-11 02:33:09,498 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/bin/utaipan-WLngWcDbfI/data/55e30ec5c/c0c89b1888b44699aff754a0665276af/FLAG05eb0aac4 [2021-10-11 02:33:09,878 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/bin/utaipan-WLngWcDbfI/data/55e30ec5c/c0c89b1888b44699aff754a0665276af [2021-10-11 02:33:09,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:33:09,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:33:09,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:09,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:33:09,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:33:09,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:09" (1/1) ... [2021-10-11 02:33:09,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a0d3dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:09, skipping insertion in model container [2021-10-11 02:33:09,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:09" (1/1) ... [2021-10-11 02:33:09,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:33:09,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:33:10,187 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_a45a2b17-1bf4-4a56-9952-69a054d77ff8/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2021-10-11 02:33:10,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:10,234 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:33:10,246 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_a45a2b17-1bf4-4a56-9952-69a054d77ff8/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2021-10-11 02:33:10,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:10,268 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:33:10,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10 WrapperNode [2021-10-11 02:33:10,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:10,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:10,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:33:10,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:33:10,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (1/1) ... [2021-10-11 02:33:10,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (1/1) ... [2021-10-11 02:33:10,307 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:10,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:33:10,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:33:10,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:33:10,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (1/1) ... [2021-10-11 02:33:10,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (1/1) ... [2021-10-11 02:33:10,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (1/1) ... [2021-10-11 02:33:10,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (1/1) ... [2021-10-11 02:33:10,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (1/1) ... [2021-10-11 02:33:10,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (1/1) ... [2021-10-11 02:33:10,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (1/1) ... [2021-10-11 02:33:10,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:33:10,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:33:10,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:33:10,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:33:10,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/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 02:33:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:33:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:33:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:33:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:33:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:33:10,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:33:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:33:10,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:33:10,897 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-11 02:33:10,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:10 BoogieIcfgContainer [2021-10-11 02:33:10,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:33:10,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:33:10,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:33:10,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:33:10,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:33:09" (1/3) ... [2021-10-11 02:33:10,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108fa992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:10, skipping insertion in model container [2021-10-11 02:33:10,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:10" (2/3) ... [2021-10-11 02:33:10,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108fa992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:10, skipping insertion in model container [2021-10-11 02:33:10,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:10" (3/3) ... [2021-10-11 02:33:10,920 INFO L111 eAbstractionObserver]: Analyzing ICFG indp2.c [2021-10-11 02:33:10,934 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:33:10,938 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:33:10,952 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:33:10,979 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:33:10,980 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:33:10,980 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:33:10,980 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:33:10,980 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:33:10,980 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:33:10,981 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:33:10,981 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:33:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-10-11 02:33:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:33:11,000 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:11,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:11,001 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash -16623148, now seen corresponding path program 1 times [2021-10-11 02:33:11,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:11,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673782092] [2021-10-11 02:33:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:11,208 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 02:33:11,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673782092] [2021-10-11 02:33:11,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:11,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:33:11,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187879879] [2021-10-11 02:33:11,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:33:11,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:11,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:33:11,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:33:11,233 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2021-10-11 02:33:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:11,363 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2021-10-11 02:33:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:33:11,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-10-11 02:33:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:11,374 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:33:11,375 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:33:11,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 02:33:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:33:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:33:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:33:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-10-11 02:33:11,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2021-10-11 02:33:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:11,414 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-10-11 02:33:11,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:33:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-10-11 02:33:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:33:11,416 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:11,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:11,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:33:11,417 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:11,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:11,418 INFO L82 PathProgramCache]: Analyzing trace with hash 147050282, now seen corresponding path program 1 times [2021-10-11 02:33:11,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:11,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481231921] [2021-10-11 02:33:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:11,445 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:33:11,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546278235] [2021-10-11 02:33:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/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 02:33:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:11,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:33:11,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:33:11,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:33:11,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481231921] [2021-10-11 02:33:11,709 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:11,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546278235] [2021-10-11 02:33:11,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:11,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-11 02:33:11,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315467596] [2021-10-11 02:33:11,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:33:11,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:11,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:33:11,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:33:11,720 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 5 states. [2021-10-11 02:33:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:11,821 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-10-11 02:33:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:33:11,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-10-11 02:33:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:11,824 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:33:11,824 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 02:33:11,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:33:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 02:33:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-10-11 02:33:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:33:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-10-11 02:33:11,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-10-11 02:33:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:11,839 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-10-11 02:33:11,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:33:11,839 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-10-11 02:33:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:33:11,840 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:11,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:12,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:33:12,053 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:12,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1149653049, now seen corresponding path program 1 times [2021-10-11 02:33:12,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:12,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529673694] [2021-10-11 02:33:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:12,070 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:33:12,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541016761] [2021-10-11 02:33:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/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 02:33:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-11 02:33:12,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:12,214 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-11 02:33:12,216 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:33:12,226 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:33:12,227 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:33:12,227 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:16 [2021-10-11 02:33:12,281 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-11 02:33:12,283 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:33:12,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:33:12,287 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:33:12,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:9 [2021-10-11 02:33:12,310 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-10-11 02:33:12,312 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:33:12,315 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:33:12,316 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:33:12,316 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:7 [2021-10-11 02:33:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:12,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:12,511 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-10-11 02:33:12,520 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-10-11 02:33:12,524 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-10-11 02:33:12,531 INFO L625 ElimStorePlain]: treesize reduction 8, result has 38.5 percent of original size [2021-10-11 02:33:12,532 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:33:12,539 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:33:12,540 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:33:12,540 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:11 [2021-10-11 02:33:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:33:12,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529673694] [2021-10-11 02:33:12,584 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:12,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541016761] [2021-10-11 02:33:12,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1845285278] [2021-10-11 02:33:12,604 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:33:12,605 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:12,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:12,614 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:12,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:12,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:13,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:13,803 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:14,004 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-10-11 02:33:14,223 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:33:14,457 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-10-11 02:33:14,800 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-10-11 02:33:14,806 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:14,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:33:14,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-11 02:33:14,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549089299] [2021-10-11 02:33:14,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-10-11 02:33:14,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:14,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-11 02:33:14,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:33:14,809 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 14 states. [2021-10-11 02:33:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:15,451 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-11 02:33:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-11 02:33:15,452 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2021-10-11 02:33:15,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:15,453 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:33:15,453 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:33:15,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-10-11 02:33:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:33:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 17. [2021-10-11 02:33:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:33:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-10-11 02:33:15,460 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2021-10-11 02:33:15,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:15,460 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-10-11 02:33:15,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-10-11 02:33:15,461 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-10-11 02:33:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:33:15,461 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:15,461 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:15,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:15,677 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:15,678 INFO L82 PathProgramCache]: Analyzing trace with hash 830670329, now seen corresponding path program 2 times [2021-10-11 02:33:15,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:15,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667275517] [2021-10-11 02:33:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:15,688 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:33:15,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407986710] [2021-10-11 02:33:15,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/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 02:33:15,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:33:15,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:15,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:33:15,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:33:15,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:33:15,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667275517] [2021-10-11 02:33:15,912 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:15,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407986710] [2021-10-11 02:33:15,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279137] [2021-10-11 02:33:15,917 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:33:15,917 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:15,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:15,917 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:15,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:16,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:16,643 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:16,828 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-10-11 02:33:17,031 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:33:17,180 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-10-11 02:33:17,440 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-10-11 02:33:17,442 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:17,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:33:17,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-11 02:33:17,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896534802] [2021-10-11 02:33:17,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:33:17,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:33:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:33:17,443 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 9 states. [2021-10-11 02:33:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:17,584 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-10-11 02:33:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:33:17,598 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-10-11 02:33:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:17,598 INFO L225 Difference]: With dead ends: 49 [2021-10-11 02:33:17,599 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:33:17,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:33:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:33:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-10-11 02:33:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:33:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-11 02:33:17,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-10-11 02:33:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:17,606 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-11 02:33:17,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:33:17,607 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-11 02:33:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 02:33:17,607 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:17,607 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:17,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-11 02:33:17,808 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:17,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:17,809 INFO L82 PathProgramCache]: Analyzing trace with hash -155389748, now seen corresponding path program 3 times [2021-10-11 02:33:17,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:17,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110809856] [2021-10-11 02:33:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:17,820 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:33:17,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83033146] [2021-10-11 02:33:17,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/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 02:33:17,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:33:17,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:17,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:33:17,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:33:17,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:33:18,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110809856] [2021-10-11 02:33:18,075 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:18,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83033146] [2021-10-11 02:33:18,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85223264] [2021-10-11 02:33:18,078 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:33:18,078 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:18,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:18,079 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:18,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:18,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:18,934 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:19,107 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-10-11 02:33:19,300 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:33:19,476 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-10-11 02:33:19,920 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-10-11 02:33:19,921 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:19,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:33:19,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-10-11 02:33:19,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139822960] [2021-10-11 02:33:19,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:33:19,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:19,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:33:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:33:19,925 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 11 states. [2021-10-11 02:33:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:20,118 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-10-11 02:33:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:33:20,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2021-10-11 02:33:20,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:20,121 INFO L225 Difference]: With dead ends: 61 [2021-10-11 02:33:20,121 INFO L226 Difference]: Without dead ends: 47 [2021-10-11 02:33:20,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:33:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-11 02:33:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2021-10-11 02:33:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 02:33:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-10-11 02:33:20,129 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2021-10-11 02:33:20,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:20,129 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-10-11 02:33:20,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:33:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-10-11 02:33:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:33:20,130 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:20,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:20,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:20,331 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:20,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2089542371, now seen corresponding path program 1 times [2021-10-11 02:33:20,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:20,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871206575] [2021-10-11 02:33:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:20,341 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:33:20,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746012449] [2021-10-11 02:33:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/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 02:33:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:20,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-11 02:33:20,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:20,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:33:20,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871206575] [2021-10-11 02:33:20,970 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:20,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746012449] [2021-10-11 02:33:20,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667610263] [2021-10-11 02:33:20,975 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:33:20,975 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:20,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:20,976 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:20,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:21,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:21,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:21,980 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:22,241 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-10-11 02:33:22,477 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:33:22,723 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-10-11 02:33:23,574 WARN L197 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-10-11 02:33:24,219 WARN L197 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-10-11 02:33:24,434 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-10-11 02:33:24,435 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:24,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:33:24,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-10-11 02:33:24,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050825107] [2021-10-11 02:33:24,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-10-11 02:33:24,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:24,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-11 02:33:24,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-10-11 02:33:24,438 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 18 states. [2021-10-11 02:33:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:24,439 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-10-11 02:33:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:33:24,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2021-10-11 02:33:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:24,440 INFO L225 Difference]: With dead ends: 30 [2021-10-11 02:33:24,440 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:33:24,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-10-11 02:33:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:33:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:33:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:33:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:33:24,442 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-11 02:33:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:24,442 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:33:24,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-10-11 02:33:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:33:24,442 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:33:24,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-10-11 02:33:24,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:33:24,881 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-10-11 02:33:25,022 INFO L258 CegarLoopResult]: At program point L35-3(lines 35 38) the Hoare annotation is: (let ((.cse0 (= (+ (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset) 1) 0)) (.cse1 (< 0 ~N~0)) (.cse2 (<= ~N~0 1))) (or (and (= ULTIMATE.start_main_~i~0 0) .cse0 .cse1 .cse2) (and (<= ULTIMATE.start_main_~i~0 1) (<= 1 ULTIMATE.start_main_~i~0) .cse0 .cse1 .cse2))) [2021-10-11 02:33:25,022 INFO L262 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2021-10-11 02:33:25,023 INFO L262 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-10-11 02:33:25,023 INFO L262 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2021-10-11 02:33:25,024 INFO L258 CegarLoopResult]: At program point L40-3(lines 40 43) the Hoare annotation is: (let ((.cse0 (select |#memory_int| ULTIMATE.start_main_~a~0.base)) (.cse2 (< 0 ~N~0)) (.cse3 (<= ~N~0 1))) (or (and (= (select (let ((.cse1 (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 8)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) ULTIMATE.start_main_~a~0.offset) 0) (<= ULTIMATE.start_main_~i~0 1) (<= 1 ULTIMATE.start_main_~i~0) .cse2 .cse3) (and (= ULTIMATE.start_main_~i~0 0) (= (+ (select .cse0 ULTIMATE.start_main_~a~0.offset) 1) 0) .cse2 .cse3))) [2021-10-11 02:33:25,025 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:33:25,025 INFO L262 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2021-10-11 02:33:25,025 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-10-11 02:33:25,025 INFO L258 CegarLoopResult]: At program point L45-3(lines 45 48) the Hoare annotation is: (let ((.cse0 (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))) (.cse1 (< 0 ~N~0)) (.cse2 (<= ~N~0 1))) (or (and .cse0 (<= ULTIMATE.start_main_~i~0 1) (<= 1 ULTIMATE.start_main_~i~0) .cse1 .cse2) (and .cse0 (<= 2 ULTIMATE.start_main_~i~0) (<= ~N~0 2) .cse1 (<= ULTIMATE.start_main_~i~0 2)) (and (= ULTIMATE.start_main_~i~0 0) (= (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset) 0) .cse1 .cse2))) [2021-10-11 02:33:25,025 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:33:25,025 INFO L265 CegarLoopResult]: At program point L50(lines 21 51) the Hoare annotation is: true [2021-10-11 02:33:25,026 INFO L258 CegarLoopResult]: At program point L30-3(lines 30 33) the Hoare annotation is: false [2021-10-11 02:33:25,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:33:25 BoogieIcfgContainer [2021-10-11 02:33:25,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:33:25,056 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:33:25,057 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:33:25,057 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:33:25,057 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:10" (3/4) ... [2021-10-11 02:33:25,060 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:33:25,070 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-11 02:33:25,070 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:33:25,071 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:33:25,071 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:33:25,107 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45a2b17-1bf4-4a56-9952-69a054d77ff8/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:33:25,107 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:33:25,108 INFO L168 Benchmark]: Toolchain (without parser) took 15225.81 ms. Allocated memory was 107.0 MB in the beginning and 272.6 MB in the end (delta: 165.7 MB). Free memory was 77.8 MB in the beginning and 122.6 MB in the end (delta: -44.8 MB). Peak memory consumption was 120.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:25,109 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory was 64.1 MB in the beginning and 64.0 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:25,109 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.01 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 77.6 MB in the beginning and 132.4 MB in the end (delta: -54.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:25,110 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.13 ms. Allocated memory is still 157.3 MB. Free memory was 132.4 MB in the beginning and 130.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:25,110 INFO L168 Benchmark]: Boogie Preprocessor took 28.96 ms. Allocated memory is still 157.3 MB. Free memory was 130.9 MB in the beginning and 129.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:25,111 INFO L168 Benchmark]: RCFGBuilder took 561.82 ms. Allocated memory is still 157.3 MB. Free memory was 129.8 MB in the beginning and 106.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:25,111 INFO L168 Benchmark]: TraceAbstraction took 14154.39 ms. Allocated memory was 157.3 MB in the beginning and 272.6 MB in the end (delta: 115.3 MB). Free memory was 106.2 MB in the beginning and 125.8 MB in the end (delta: -19.5 MB). Peak memory consumption was 98.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:25,112 INFO L168 Benchmark]: Witness Printer took 50.97 ms. Allocated memory is still 272.6 MB. Free memory was 125.8 MB in the beginning and 122.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:25,114 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory was 64.1 MB in the beginning and 64.0 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 380.01 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 77.6 MB in the beginning and 132.4 MB in the end (delta: -54.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.13 ms. Allocated memory is still 157.3 MB. Free memory was 132.4 MB in the beginning and 130.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.96 ms. Allocated memory is still 157.3 MB. Free memory was 130.9 MB in the beginning and 129.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 561.82 ms. Allocated memory is still 157.3 MB. Free memory was 129.8 MB in the beginning and 106.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14154.39 ms. Allocated memory was 157.3 MB in the beginning and 272.6 MB in the end (delta: 115.3 MB). Free memory was 106.2 MB in the beginning and 125.8 MB in the end (delta: -19.5 MB). Peak memory consumption was 98.9 MB. Max. memory is 16.1 GB. * Witness Printer took 50.97 ms. Allocated memory is still 272.6 MB. Free memory was 125.8 MB in the beginning and 122.6 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: 15]: 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: 45]: Loop Invariant Derived loop invariant: (((((!(0 == cond) && i <= 1) && 1 <= i) && 0 < N) && N <= 1) || ((((!(0 == cond) && 2 <= i) && N <= 2) && 0 < N) && i <= 2)) || (((i == 0 && unknown-#memory_int-unknown[a][a] == 0) && 0 < N) && N <= 1) - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((unknown-#memory_int-unknown[a][a + i * 8 := unknown-#memory_int-unknown[a][a + i * 8] + 1][a] == 0 && i <= 1) && 1 <= i) && 0 < N) && N <= 1) || (((i == 0 && unknown-#memory_int-unknown[a][a] + 1 == 0) && 0 < N) && N <= 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((i == 0 && unknown-#memory_int-unknown[a][a] + 1 == 0) && 0 < N) && N <= 1) || ((((i <= 1 && 1 <= i) && unknown-#memory_int-unknown[a][a] + 1 == 0) && 0 < N) && N <= 1) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.6s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 88 SDslu, 82 SDs, 0 SdLazy, 278 SolverSat, 124 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 90 SyntacticMatches, 20 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, 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, 52 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 13 NumberOfFragments, 153 HoareAnnotationTreeSize, 5 FomulaSimplifications, 271 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 267 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 73 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 127 ConstructedInterpolants, 0 QuantifiedInterpolants, 10617 SizeOfPredicates, 31 NumberOfNonLiveVariables, 407 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 36/70 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...