./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum04-2.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-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum04-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan --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 e4783c6ee2901b631023e80ae57ac531c222bf81 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 06:19:46,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 06:19:46,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 06:19:46,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 06:19:46,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 06:19:46,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 06:19:46,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 06:19:46,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 06:19:46,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 06:19:46,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 06:19:46,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 06:19:46,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 06:19:46,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 06:19:46,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 06:19:46,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 06:19:46,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 06:19:46,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 06:19:46,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 06:19:46,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 06:19:46,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 06:19:46,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 06:19:46,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 06:19:46,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 06:19:46,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 06:19:46,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 06:19:46,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 06:19:46,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 06:19:46,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 06:19:46,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 06:19:46,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 06:19:46,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 06:19:46,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 06:19:46,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 06:19:46,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 06:19:46,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 06:19:46,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 06:19:46,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 06:19:46,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 06:19:46,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 06:19:46,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 06:19:46,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 06:19:46,719 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 06:19:46,735 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 06:19:46,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 06:19:46,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 06:19:46,736 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 06:19:46,736 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 06:19:46,736 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 06:19:46,737 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 06:19:46,737 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 06:19:46,737 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 06:19:46,737 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 06:19:46,737 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 06:19:46,737 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 06:19:46,737 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 06:19:46,737 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 06:19:46,737 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 06:19:46,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 06:19:46,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 06:19:46,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 06:19:46,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 06:19:46,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 06:19:46,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 06:19:46,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 06:19:46,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 06:19:46,739 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 06:19:46,739 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 06:19:46,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 06:19:46,739 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 06:19:46,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 06:19:46,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 06:19:46,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 06:19:46,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:19:46,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 06:19:46,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 06:19:46,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 06:19:46,740 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 06:19:46,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 06:19:46,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 06:19:46,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 06:19:46,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 06:19:46,741 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-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4783c6ee2901b631023e80ae57ac531c222bf81 [2020-12-09 06:19:46,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 06:19:46,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 06:19:46,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 06:19:46,936 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 06:19:46,937 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 06:19:46,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/../../sv-benchmarks/c/loops/sum04-2.i [2020-12-09 06:19:46,979 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/data/11c5c54bb/02bc81ced1be4e80a5fcb0981fffa04a/FLAG519be4814 [2020-12-09 06:19:47,331 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 06:19:47,331 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/sv-benchmarks/c/loops/sum04-2.i [2020-12-09 06:19:47,336 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/data/11c5c54bb/02bc81ced1be4e80a5fcb0981fffa04a/FLAG519be4814 [2020-12-09 06:19:47,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/data/11c5c54bb/02bc81ced1be4e80a5fcb0981fffa04a [2020-12-09 06:19:47,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 06:19:47,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 06:19:47,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 06:19:47,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 06:19:47,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 06:19:47,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d0ba21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47, skipping insertion in model container [2020-12-09 06:19:47,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 06:19:47,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 06:19:47,472 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/sv-benchmarks/c/loops/sum04-2.i[808,821] [2020-12-09 06:19:47,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:19:47,484 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 06:19:47,493 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/sv-benchmarks/c/loops/sum04-2.i[808,821] [2020-12-09 06:19:47,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:19:47,504 INFO L208 MainTranslator]: Completed translation [2020-12-09 06:19:47,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47 WrapperNode [2020-12-09 06:19:47,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 06:19:47,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 06:19:47,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 06:19:47,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 06:19:47,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 06:19:47,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 06:19:47,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 06:19:47,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 06:19:47,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (1/1) ... [2020-12-09 06:19:47,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 06:19:47,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 06:19:47,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 06:19:47,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 06:19:47,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/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 [2020-12-09 06:19:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 06:19:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 06:19:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 06:19:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 06:19:47,759 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 06:19:47,759 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 06:19:47,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:19:47 BoogieIcfgContainer [2020-12-09 06:19:47,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 06:19:47,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 06:19:47,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 06:19:47,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 06:19:47,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:19:47" (1/3) ... [2020-12-09 06:19:47,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b0ac48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:19:47, skipping insertion in model container [2020-12-09 06:19:47,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:19:47" (2/3) ... [2020-12-09 06:19:47,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b0ac48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:19:47, skipping insertion in model container [2020-12-09 06:19:47,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:19:47" (3/3) ... [2020-12-09 06:19:47,767 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-12-09 06:19:47,777 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 06:19:47,779 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 06:19:47,786 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 06:19:47,805 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 06:19:47,805 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 06:19:47,805 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 06:19:47,805 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 06:19:47,805 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 06:19:47,805 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 06:19:47,805 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 06:19:47,805 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 06:19:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-12-09 06:19:47,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 06:19:47,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:19:47,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 06:19:47,818 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:19:47,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:19:47,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1850535, now seen corresponding path program 1 times [2020-12-09 06:19:47,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:19:47,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150206146] [2020-12-09 06:19:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:19:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:19:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:47,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150206146] [2020-12-09 06:19:47,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:19:47,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:19:47,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719092024] [2020-12-09 06:19:47,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 06:19:47,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:19:47,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 06:19:47,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 06:19:47,949 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2020-12-09 06:19:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:19:47,964 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2020-12-09 06:19:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 06:19:47,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 06:19:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:19:47,971 INFO L225 Difference]: With dead ends: 13 [2020-12-09 06:19:47,972 INFO L226 Difference]: Without dead ends: 6 [2020-12-09 06:19:47,974 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 [2020-12-09 06:19:47,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-12-09 06:19:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-12-09 06:19:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-09 06:19:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-12-09 06:19:47,996 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2020-12-09 06:19:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:19:47,997 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-12-09 06:19:47,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 06:19:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-12-09 06:19:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 06:19:47,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:19:47,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 06:19:47,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 06:19:47,998 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:19:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:19:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash 57291586, now seen corresponding path program 1 times [2020-12-09 06:19:47,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:19:47,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564225592] [2020-12-09 06:19:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:19:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:19:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:48,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564225592] [2020-12-09 06:19:48,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249596943] [2020-12-09 06:19:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/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 [2020-12-09 06:19:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:19:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 06:19:48,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:19:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:48,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:19:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:48,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135285219] [2020-12-09 06:19:48,153 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 06:19:48,153 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:19:48,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:19:48,167 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:19:48,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:19:48,461 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:19:48,629 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:19:48,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:19:48,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2020-12-09 06:19:48,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437716371] [2020-12-09 06:19:48,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 06:19:48,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:19:48,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 06:19:48,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-09 06:19:48,634 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 7 states. [2020-12-09 06:19:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:19:48,649 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2020-12-09 06:19:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:19:48,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2020-12-09 06:19:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:19:48,650 INFO L225 Difference]: With dead ends: 12 [2020-12-09 06:19:48,650 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 06:19:48,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-09 06:19:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 06:19:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-09 06:19:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 06:19:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-09 06:19:48,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2020-12-09 06:19:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:19:48,654 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-09 06:19:48,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 06:19:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-09 06:19:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 06:19:48,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:19:48,655 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2020-12-09 06:19:48,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 06:19:48,858 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:19:48,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:19:48,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1597148007, now seen corresponding path program 2 times [2020-12-09 06:19:48,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:19:48,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396938241] [2020-12-09 06:19:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:19:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:19:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:49,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396938241] [2020-12-09 06:19:49,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831427224] [2020-12-09 06:19:49,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/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 [2020-12-09 06:19:49,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 06:19:49,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:19:49,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 06:19:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:19:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:49,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:19:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:49,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1468397783] [2020-12-09 06:19:49,131 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 06:19:49,131 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:19:49,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:19:49,131 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:19:49,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:19:49,228 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:19:49,403 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:19:49,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:19:49,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2020-12-09 06:19:49,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225892254] [2020-12-09 06:19:49,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 06:19:49,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:19:49,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 06:19:49,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-12-09 06:19:49,405 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 11 states. [2020-12-09 06:19:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:19:49,419 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2020-12-09 06:19:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 06:19:49,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2020-12-09 06:19:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:19:49,419 INFO L225 Difference]: With dead ends: 16 [2020-12-09 06:19:49,420 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 06:19:49,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-12-09 06:19:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 06:19:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-09 06:19:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 06:19:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-09 06:19:49,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2020-12-09 06:19:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:19:49,422 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-09 06:19:49,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 06:19:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-09 06:19:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 06:19:49,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:19:49,423 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2020-12-09 06:19:49,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-09 06:19:49,625 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:19:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:19:49,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1727825369, now seen corresponding path program 3 times [2020-12-09 06:19:49,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:19:49,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70069904] [2020-12-09 06:19:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:19:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:19:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:49,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70069904] [2020-12-09 06:19:49,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585060743] [2020-12-09 06:19:49,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/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 [2020-12-09 06:19:49,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 06:19:49,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:19:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 06:19:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:19:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:49,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:19:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:50,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57482312] [2020-12-09 06:19:50,144 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 06:19:50,144 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:19:50,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:19:50,145 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:19:50,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:19:50,229 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:19:50,444 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:19:50,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 06:19:50,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2020-12-09 06:19:50,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517700967] [2020-12-09 06:19:50,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-09 06:19:50,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:19:50,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-09 06:19:50,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2020-12-09 06:19:50,446 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 22 states. [2020-12-09 06:19:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:19:50,532 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-09 06:19:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 06:19:50,533 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 12 [2020-12-09 06:19:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:19:50,533 INFO L225 Difference]: With dead ends: 17 [2020-12-09 06:19:50,533 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 06:19:50,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-12-09 06:19:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 06:19:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 06:19:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 06:19:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-09 06:19:50,536 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-12-09 06:19:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:19:50,536 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-09 06:19:50,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-09 06:19:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-09 06:19:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 06:19:50,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:19:50,537 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2020-12-09 06:19:50,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-09 06:19:50,739 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:19:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:19:50,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2023053886, now seen corresponding path program 4 times [2020-12-09 06:19:50,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:19:50,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809156085] [2020-12-09 06:19:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:19:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:19:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:50,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809156085] [2020-12-09 06:19:50,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804246714] [2020-12-09 06:19:50,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/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 [2020-12-09 06:19:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:19:50,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 06:19:50,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:19:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:50,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:19:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:19:51,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 06:19:51,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [10] total 11 [2020-12-09 06:19:51,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845953458] [2020-12-09 06:19:51,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 06:19:51,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:19:51,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 06:19:51,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-12-09 06:19:51,021 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-09 06:19:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:19:51,033 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-09 06:19:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 06:19:51,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-09 06:19:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:19:51,034 INFO L225 Difference]: With dead ends: 14 [2020-12-09 06:19:51,034 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 06:19:51,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-12-09 06:19:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 06:19:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 06:19:51,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 06:19:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 06:19:51,035 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-12-09 06:19:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:19:51,035 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 06:19:51,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 06:19:51,035 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 06:19:51,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 06:19:51,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:19:51,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 06:19:51,474 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-09 06:19:51,477 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 06:19:51,477 INFO L262 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-12-09 06:19:51,477 INFO L265 CegarLoopResult]: At program point L15-2(lines 1 28) the Hoare annotation is: true [2020-12-09 06:19:51,477 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 06:19:51,477 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-09 06:19:51,477 INFO L258 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (<= 2 ULTIMATE.start_main_~i~0) (<= 2 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 2) (<= ULTIMATE.start_main_~sn~0 2)) (and (<= 8 ULTIMATE.start_main_~i~0) (<= 14 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~sn~0 14) (<= ULTIMATE.start_main_~i~0 8)) (and (<= ULTIMATE.start_main_~i~0 3) (<= ULTIMATE.start_main_~sn~0 4) (<= 4 ULTIMATE.start_main_~sn~0) (<= 3 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~sn~0 12) (<= 12 ULTIMATE.start_main_~sn~0) (<= 7 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 7)) (and (= ULTIMATE.start_main_~i~0 1) (= ULTIMATE.start_main_~sn~0 0)) (and (<= ULTIMATE.start_main_~sn~0 6) (<= 6 ULTIMATE.start_main_~sn~0) (<= 4 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 4)) (and (<= ULTIMATE.start_main_~sn~0 16) (<= 9 ULTIMATE.start_main_~i~0) (< 15 ULTIMATE.start_main_~sn~0)) (and (<= ULTIMATE.start_main_~i~0 5) (<= ULTIMATE.start_main_~sn~0 8) (<= 5 ULTIMATE.start_main_~i~0) (<= 8 ULTIMATE.start_main_~sn~0)) (and (<= 10 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 6) (<= ULTIMATE.start_main_~sn~0 10) (<= 6 ULTIMATE.start_main_~i~0))) [2020-12-09 06:19:51,477 INFO L262 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-09 06:19:51,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:19:51 BoogieIcfgContainer [2020-12-09 06:19:51,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 06:19:51,490 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 06:19:51,490 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 06:19:51,490 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 06:19:51,490 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:19:47" (3/4) ... [2020-12-09 06:19:51,492 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 06:19:51,497 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-09 06:19:51,498 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 06:19:51,498 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 06:19:51,498 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 06:19:51,518 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4936d7c8-91e6-4d31-9b45-ac305d72bbf8/bin/utaipan/witness.graphml [2020-12-09 06:19:51,518 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 06:19:51,519 INFO L168 Benchmark]: Toolchain (without parser) took 4170.38 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 81.1 MB in the beginning and 112.4 MB in the end (delta: -31.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:19:51,519 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 117.4 MB. Free memory is still 97.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:19:51,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.34 ms. Allocated memory is still 117.4 MB. Free memory was 80.8 MB in the beginning and 93.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 06:19:51,520 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 117.4 MB. Free memory was 93.8 MB in the beginning and 92.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:19:51,520 INFO L168 Benchmark]: Boogie Preprocessor took 12.50 ms. Allocated memory is still 117.4 MB. Free memory was 92.7 MB in the beginning and 91.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:19:51,520 INFO L168 Benchmark]: RCFGBuilder took 221.79 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 79.1 MB in the end (delta: 12.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 06:19:51,521 INFO L168 Benchmark]: TraceAbstraction took 3727.20 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 78.6 MB in the beginning and 115.6 MB in the end (delta: -36.9 MB). Peak memory consumption was 66.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:19:51,521 INFO L168 Benchmark]: Witness Printer took 28.20 ms. Allocated memory is still 142.6 MB. Free memory was 115.6 MB in the beginning and 112.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 06:19:51,523 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 117.4 MB. Free memory is still 97.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 155.34 ms. Allocated memory is still 117.4 MB. Free memory was 80.8 MB in the beginning and 93.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 117.4 MB. Free memory was 93.8 MB in the beginning and 92.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.50 ms. Allocated memory is still 117.4 MB. Free memory was 92.7 MB in the beginning and 91.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 221.79 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 79.1 MB in the end (delta: 12.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3727.20 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 78.6 MB in the beginning and 115.6 MB in the end (delta: -36.9 MB). Peak memory consumption was 66.1 MB. Max. memory is 16.1 GB. * Witness Printer took 28.20 ms. Allocated memory is still 142.6 MB. Free memory was 115.6 MB in the beginning and 112.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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: 24]: Loop Invariant Derived loop invariant: ((((((((((2 <= i && 2 <= sn) && i <= 2) && sn <= 2) || (((8 <= i && 14 <= sn) && sn <= 14) && i <= 8)) || (((i <= 3 && sn <= 4) && 4 <= sn) && 3 <= i)) || (((sn <= 12 && 12 <= sn) && 7 <= i) && i <= 7)) || (i == 1 && sn == 0)) || (((sn <= 6 && 6 <= sn) && 4 <= i) && i <= 4)) || ((sn <= 16 && 9 <= i) && 15 < sn)) || (((i <= 5 && sn <= 8) && 5 <= i) && 8 <= sn)) || (((10 <= sn && i <= 6) && sn <= 10) && 6 <= i) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 5, TraceHistogramMax: 9, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 2 SDslu, 40 SDs, 0 SdLazy, 190 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=4, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 12 NumberOfFragments, 110 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 9 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 3858 SizeOfPredicates, 2 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 127/276 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...