./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/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_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/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_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/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 b3a725921be8310e882457f7f33c9ff7dbee0bc2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:21:22,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:21:22,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:21:22,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:21:22,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:21:22,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:21:22,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:21:22,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:21:22,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:21:22,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:21:22,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:21:22,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:21:22,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:21:22,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:21:22,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:21:22,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:21:22,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:21:22,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:21:22,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:21:22,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:21:22,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:21:22,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:21:22,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:21:22,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:21:22,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:21:22,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:21:22,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:21:22,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:21:22,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:21:22,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:21:22,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:21:22,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:21:22,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:21:22,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:21:22,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:21:22,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:21:22,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:21:22,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:21:22,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:21:22,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:21:22,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:21:22,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:21:22,812 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:21:22,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:21:22,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:21:22,816 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:21:22,816 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:21:22,817 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:21:22,817 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:21:22,817 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:21:22,823 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:21:22,824 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:21:22,825 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:21:22,825 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:21:22,826 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:21:22,826 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:21:22,826 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:21:22,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:21:22,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:21:22,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:21:22,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:21:22,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:21:22,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:21:22,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:21:22,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:21:22,829 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:21:22,829 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:21:22,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:21:22,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:21:22,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:21:22,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:21:22,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:21:22,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:22,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:21:22,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:21:22,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:21:22,833 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:21:22,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:21:22,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:21:22,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:21:22,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:21:22,834 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_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2021-10-11 02:21:23,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:21:23,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:21:23,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:21:23,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:21:23,186 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:21:23,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/loop-invgen/nested6.i [2021-10-11 02:21:23,255 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/bin/utaipan-WLngWcDbfI/data/2d7d2ddda/c4b9c0942d6a4a80bf9aa0c14b3f3231/FLAG5d31018be [2021-10-11 02:21:23,690 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:21:23,693 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/sv-benchmarks/c/loop-invgen/nested6.i [2021-10-11 02:21:23,705 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/bin/utaipan-WLngWcDbfI/data/2d7d2ddda/c4b9c0942d6a4a80bf9aa0c14b3f3231/FLAG5d31018be [2021-10-11 02:21:24,065 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/bin/utaipan-WLngWcDbfI/data/2d7d2ddda/c4b9c0942d6a4a80bf9aa0c14b3f3231 [2021-10-11 02:21:24,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:21:24,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:21:24,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:24,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:21:24,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:21:24,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48a5d746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24, skipping insertion in model container [2021-10-11 02:21:24,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:21:24,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:21:24,308 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_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-11 02:21:24,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:24,331 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:21:24,345 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_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-11 02:21:24,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:24,367 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:21:24,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24 WrapperNode [2021-10-11 02:21:24,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:24,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:24,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:21:24,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:21:24,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:24,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:21:24,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:21:24,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:21:24,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... [2021-10-11 02:21:24,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:21:24,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:21:24,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:21:24,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:21:24,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/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 02:21:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:21:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:21:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:21:24,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:21:24,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:21:24,904 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-11 02:21:24,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:24 BoogieIcfgContainer [2021-10-11 02:21:24,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:21:24,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:21:24,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:21:24,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:21:24,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:21:24" (1/3) ... [2021-10-11 02:21:24,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2ba086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:24, skipping insertion in model container [2021-10-11 02:21:24,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:24" (2/3) ... [2021-10-11 02:21:24,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2ba086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:24, skipping insertion in model container [2021-10-11 02:21:24,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:24" (3/3) ... [2021-10-11 02:21:24,916 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2021-10-11 02:21:24,930 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:21:24,933 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-10-11 02:21:24,946 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-11 02:21:24,974 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:21:24,974 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:21:24,975 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:21:24,975 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:21:24,975 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:21:24,975 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:21:24,975 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:21:24,976 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:21:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-10-11 02:21:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:21:24,996 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:24,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:24,998 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:25,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:25,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1695116993, now seen corresponding path program 1 times [2021-10-11 02:21:25,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:25,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649882234] [2021-10-11 02:21:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:25,256 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 02:21:25,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649882234] [2021-10-11 02:21:25,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:25,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:21:25,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200345408] [2021-10-11 02:21:25,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:21:25,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:25,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:21:25,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:21:25,285 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2021-10-11 02:21:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:25,404 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2021-10-11 02:21:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:21:25,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:21:25,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:25,416 INFO L225 Difference]: With dead ends: 50 [2021-10-11 02:21:25,416 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:21:25,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:21:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:21:25,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-10-11 02:21:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:21:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-10-11 02:21:25,454 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2021-10-11 02:21:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:25,455 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-10-11 02:21:25,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:21:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-10-11 02:21:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:21:25,456 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:25,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:25,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:21:25,457 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:25,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1008254693, now seen corresponding path program 1 times [2021-10-11 02:21:25,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:25,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413802271] [2021-10-11 02:21:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:25,526 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 02:21:25,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413802271] [2021-10-11 02:21:25,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:25,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:21:25,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793679154] [2021-10-11 02:21:25,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:21:25,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:21:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:21:25,531 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2021-10-11 02:21:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:25,669 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-10-11 02:21:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:21:25,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-10-11 02:21:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:25,671 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:21:25,671 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 02:21:25,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:21:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 02:21:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 15. [2021-10-11 02:21:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:21:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-10-11 02:21:25,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-10-11 02:21:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:25,684 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-10-11 02:21:25,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:21:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-10-11 02:21:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:21:25,685 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:25,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:25,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:21:25,686 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:25,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1214982116, now seen corresponding path program 1 times [2021-10-11 02:21:25,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:25,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819157763] [2021-10-11 02:21:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:25,768 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 02:21:25,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819157763] [2021-10-11 02:21:25,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:25,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:21:25,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368471402] [2021-10-11 02:21:25,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:21:25,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:25,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:21:25,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:21:25,772 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2021-10-11 02:21:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:25,845 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-10-11 02:21:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:21:25,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-10-11 02:21:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:25,847 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:21:25,847 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 02:21:25,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:21:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 02:21:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-10-11 02:21:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:21:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-11 02:21:25,856 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 10 [2021-10-11 02:21:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:25,856 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-11 02:21:25,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:21:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-11 02:21:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:21:25,857 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:25,858 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:25,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:21:25,858 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:25,859 INFO L82 PathProgramCache]: Analyzing trace with hash 14691350, now seen corresponding path program 1 times [2021-10-11 02:21:25,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:25,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857040011] [2021-10-11 02:21:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:25,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857040011] [2021-10-11 02:21:25,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355157670] [2021-10-11 02:21:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/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 02:21:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:26,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:21:26,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:26,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:26,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:21:26,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 9 [2021-10-11 02:21:26,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981576454] [2021-10-11 02:21:26,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:21:26,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:26,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:21:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:21:26,362 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 7 states. [2021-10-11 02:21:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:26,593 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-10-11 02:21:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:21:26,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2021-10-11 02:21:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:26,597 INFO L225 Difference]: With dead ends: 74 [2021-10-11 02:21:26,597 INFO L226 Difference]: Without dead ends: 55 [2021-10-11 02:21:26,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:21:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-11 02:21:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 25. [2021-10-11 02:21:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 02:21:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-10-11 02:21:26,626 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 14 [2021-10-11 02:21:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:26,626 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-10-11 02:21:26,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:21:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-10-11 02:21:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:21:26,630 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:26,630 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:26,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:26,846 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:26,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:26,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1701972009, now seen corresponding path program 1 times [2021-10-11 02:21:26,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:26,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136163803] [2021-10-11 02:21:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:26,977 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 02:21:26,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136163803] [2021-10-11 02:21:26,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56517083] [2021-10-11 02:21:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/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 02:21:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:27,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:21:27,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:27,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:27,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659575163] [2021-10-11 02:21:27,182 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-11 02:21:27,182 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:27,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:27,196 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:27,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:27,759 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-11 02:21:27,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:21:27,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2021-10-11 02:21:27,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228035034] [2021-10-11 02:21:27,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:21:27,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:27,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:21:27,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:21:27,770 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 12 states. [2021-10-11 02:21:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:28,373 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2021-10-11 02:21:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-11 02:21:28,374 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2021-10-11 02:21:28,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:28,374 INFO L225 Difference]: With dead ends: 68 [2021-10-11 02:21:28,375 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:21:28,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2021-10-11 02:21:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:21:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:21:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:21:28,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:21:28,381 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-11 02:21:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:28,381 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:21:28,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:21:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:21:28,382 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:21:28,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:28,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:21:28,849 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 19 [2021-10-11 02:21:29,067 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-10-11 02:21:29,183 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 23 [2021-10-11 02:21:29,259 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-11 02:21:29,259 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-11 02:21:29,259 INFO L262 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-10-11 02:21:29,259 INFO L262 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2021-10-11 02:21:29,260 INFO L258 CegarLoopResult]: At program point L36-2(lines 36 38) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse1 (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0)) (.cse2 (<= .cse0 ULTIMATE.start_main_~k~0))) (or (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= .cse0 ULTIMATE.start_main_~j~0) .cse1 (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) .cse2) (and (= ULTIMATE.start_main_~i~0 0) (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~j~0) .cse1 .cse2)))) [2021-10-11 02:21:29,260 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:21:29,260 INFO L262 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-11 02:21:29,260 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-11 02:21:29,260 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:21:29,260 INFO L258 CegarLoopResult]: At program point L33-3(lines 33 45) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0)) (.cse1 (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0))) (or (and (= ULTIMATE.start_main_~i~0 0) .cse0 .cse1) (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) .cse0 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~j~0) .cse1))) [2021-10-11 02:21:29,260 INFO L262 CegarLoopResult]: For program point L29(lines 29 32) no Hoare annotation was computed. [2021-10-11 02:21:29,260 INFO L265 CegarLoopResult]: At program point L46(lines 24 48) the Hoare annotation is: true [2021-10-11 02:21:29,261 INFO L258 CegarLoopResult]: At program point L34-2(lines 34 44) the Hoare annotation is: (let ((.cse0 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) (.cse1 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0)) (.cse2 (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0))) (or (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) .cse0 .cse1 .cse2) (let ((.cse3 (div (* ULTIMATE.start_main_~j~0 (- 1)) (- 2)))) (and (<= .cse3 0) .cse0 .cse1 (= ULTIMATE.start_main_~i~0 0) (< .cse3 ULTIMATE.start_main_~n~0) .cse2)))) [2021-10-11 02:21:29,261 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-11 02:21:29,261 INFO L262 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-11 02:21:29,261 INFO L258 CegarLoopResult]: At program point L18-2(lines 1 48) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_main_~i~0))) (and (<= .cse0 ULTIMATE.start_main_~j~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= (+ ULTIMATE.start_main_~k~0 1) ULTIMATE.start_main_~n~0) (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0) (<= .cse0 ULTIMATE.start_main_~k~0))) [2021-10-11 02:21:29,261 INFO L262 CegarLoopResult]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2021-10-11 02:21:29,261 INFO L265 CegarLoopResult]: At program point L47(lines 24 48) the Hoare annotation is: true [2021-10-11 02:21:29,261 INFO L258 CegarLoopResult]: At program point L18-5(lines 17 22) the Hoare annotation is: (and (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0) (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0) (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0)) [2021-10-11 02:21:29,261 INFO L262 CegarLoopResult]: For program point L18-6(lines 18 20) no Hoare annotation was computed. [2021-10-11 02:21:29,262 INFO L258 CegarLoopResult]: At program point L18-8(lines 1 48) the Hoare annotation is: (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0) (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0) (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0)) [2021-10-11 02:21:29,262 INFO L262 CegarLoopResult]: For program point L35(lines 35 43) no Hoare annotation was computed. [2021-10-11 02:21:29,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:21:29 BoogieIcfgContainer [2021-10-11 02:21:29,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:21:29,282 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:21:29,282 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:21:29,282 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:21:29,283 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:24" (3/4) ... [2021-10-11 02:21:29,286 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:21:29,295 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-11 02:21:29,296 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-11 02:21:29,296 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:21:29,296 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:21:29,337 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd37f2fa-ae2c-4307-ae4b-919e9b5d785e/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:21:29,337 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:21:29,338 INFO L168 Benchmark]: Toolchain (without parser) took 5268.46 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 66.5 MB in the beginning and 76.3 MB in the end (delta: -9.8 MB). Peak memory consumption was 34.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:29,339 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory is still 82.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:29,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.85 ms. Allocated memory is still 102.8 MB. Free memory was 66.3 MB in the beginning and 77.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:29,340 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.19 ms. Allocated memory is still 102.8 MB. Free memory was 77.5 MB in the beginning and 76.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:29,340 INFO L168 Benchmark]: Boogie Preprocessor took 31.48 ms. Allocated memory is still 102.8 MB. Free memory was 76.2 MB in the beginning and 75.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:29,341 INFO L168 Benchmark]: RCFGBuilder took 474.82 ms. Allocated memory is still 102.8 MB. Free memory was 75.0 MB in the beginning and 58.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:29,341 INFO L168 Benchmark]: TraceAbstraction took 4373.41 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 57.8 MB in the beginning and 78.4 MB in the end (delta: -20.6 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:29,342 INFO L168 Benchmark]: Witness Printer took 55.40 ms. Allocated memory is still 148.9 MB. Free memory was 78.4 MB in the beginning and 76.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:29,344 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory is still 82.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.85 ms. Allocated memory is still 102.8 MB. Free memory was 66.3 MB in the beginning and 77.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.19 ms. Allocated memory is still 102.8 MB. Free memory was 77.5 MB in the beginning and 76.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.48 ms. Allocated memory is still 102.8 MB. Free memory was 76.2 MB in the beginning and 75.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 474.82 ms. Allocated memory is still 102.8 MB. Free memory was 75.0 MB in the beginning and 58.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4373.41 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 57.8 MB in the beginning and 78.4 MB in the end (delta: -20.6 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. * Witness Printer took 55.40 ms. Allocated memory is still 148.9 MB. Free memory was 78.4 MB in the beginning and 76.3 MB in the end (delta: 2.1 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: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: 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 3 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: (((!(0 == cond) && 2 * i <= j) && n <= k) && j + 1 <= n) && k <= n - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: (((2 * i <= j && !(0 == cond)) && k + 1 <= n) && j + 1 <= n) && 2 * i <= k - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((!(0 == cond) && 2 * i <= j) && n <= k) && k <= n) || (((((j * -1 / -2 <= 0 && 2 * i <= j) && n <= k) && i == 0) && j * -1 / -2 < n) && k <= n) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((!(0 == cond) && 2 * i <= j) && j + 1 <= n) && k <= n) && 2 * i <= k) || (((i == 0 && k <= j) && j + 1 <= n) && 2 * i <= k) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((2 * i <= j && !(0 == cond)) && n <= k) && j + 1 <= n) && k <= n - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((i == 0 && n <= k) && k <= n) || (((!(0 == cond) && n <= k) && n <= j) && k <= n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 176 SDslu, 77 SDs, 0 SdLazy, 292 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 58 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 47 NumberOfFragments, 181 HoareAnnotationTreeSize, 8 FomulaSimplifications, 6074 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2340 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 4396 SizeOfPredicates, 7 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 8/15 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...