./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex3.01.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex3.01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 706881f151574cd444dafd615d249704df8f903990098d13198cd104c5c995e4 ........................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 06:00:27,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:00:27,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:00:27,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:00:27,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:00:27,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:00:27,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:00:27,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:00:27,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:00:27,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:00:27,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:00:27,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:00:27,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:00:27,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:00:27,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:00:27,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:00:27,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:00:27,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:00:27,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:00:27,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:00:27,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:00:27,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:00:27,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:00:27,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:00:27,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:00:27,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:00:27,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:00:27,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:00:27,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:00:27,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:00:27,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:00:27,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:00:27,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:00:27,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:00:27,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:00:27,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:00:27,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:00:27,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:00:27,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:00:27,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:00:27,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:00:27,875 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-20 06:00:27,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:00:27,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:00:27,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:00:27,934 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:00:27,935 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:00:27,935 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:00:27,935 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 06:00:27,936 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:00:27,942 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:00:27,942 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 06:00:27,944 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 06:00:27,944 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:00:27,944 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 06:00:27,944 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 06:00:27,945 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 06:00:27,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:00:27,946 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-20 06:00:27,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 06:00:27,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:00:27,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 06:00:27,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:00:27,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 06:00:27,947 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-20 06:00:27,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 06:00:27,948 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:00:27,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 06:00:27,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:00:27,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:00:27,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:00:27,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:00:27,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:00:27,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 06:00:27,952 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 06:00:27,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 06:00:27,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 06:00:27,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:00:27,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:00:27,953 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_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 706881f151574cd444dafd615d249704df8f903990098d13198cd104c5c995e4 [2021-10-20 06:00:28,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:00:28,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:00:28,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:00:28,296 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:00:28,297 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:00:28,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex3.01.c [2021-10-20 06:00:28,371 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/data/df7706256/11193d5818d140578af2e0181fad4d17/FLAG9b945e72a [2021-10-20 06:00:28,914 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:00:28,915 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex3.01.c [2021-10-20 06:00:28,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/data/df7706256/11193d5818d140578af2e0181fad4d17/FLAG9b945e72a [2021-10-20 06:00:29,288 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/data/df7706256/11193d5818d140578af2e0181fad4d17 [2021-10-20 06:00:29,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:00:29,293 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:00:29,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:00:29,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:00:29,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:00:29,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b46b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29, skipping insertion in model container [2021-10-20 06:00:29,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:00:29,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:00:29,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:00:29,499 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 06:00:29,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:00:29,523 INFO L208 MainTranslator]: Completed translation [2021-10-20 06:00:29,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29 WrapperNode [2021-10-20 06:00:29,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:00:29,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 06:00:29,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 06:00:29,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 06:00:29,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 06:00:29,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 06:00:29,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 06:00:29,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 06:00:29,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 06:00:29,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 06:00:29,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 06:00:29,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 06:00:29,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (1/1) ... [2021-10-20 06:00:29,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:00:29,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:00:29,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 06:00:29,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 06:00:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 06:00:29,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 06:00:29,869 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 06:00:29,869 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-20 06:00:29,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:00:29 BoogieIcfgContainer [2021-10-20 06:00:29,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 06:00:29,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 06:00:29,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 06:00:29,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 06:00:29,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:00:29" (1/3) ... [2021-10-20 06:00:29,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775659d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:00:29, skipping insertion in model container [2021-10-20 06:00:29,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:00:29" (2/3) ... [2021-10-20 06:00:29,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775659d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:00:29, skipping insertion in model container [2021-10-20 06:00:29,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:00:29" (3/3) ... [2021-10-20 06:00:29,882 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex3.01.c [2021-10-20 06:00:29,888 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 06:00:29,888 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-20 06:00:29,953 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 06:00:29,964 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 06:00:29,964 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-20 06:00:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 4 states have (on average 1.75) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:00:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-20 06:00:29,986 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:00:29,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-20 06:00:29,987 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-10-20 06:00:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:00:29,995 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2021-10-20 06:00:30,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:00:30,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979669622] [2021-10-20 06:00:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:00:30,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:00:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:00:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:00:30,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:00:30,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979669622] [2021-10-20 06:00:30,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979669622] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:00:30,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:00:30,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 06:00:30,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678408684] [2021-10-20 06:00:30,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:00:30,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:00:30,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:00:30,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:00:30,252 INFO L87 Difference]: Start difference. First operand has 7 states, 4 states have (on average 1.75) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:00:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:00:30,358 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-20 06:00:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 06:00:30,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-20 06:00:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:00:30,369 INFO L225 Difference]: With dead ends: 13 [2021-10-20 06:00:30,369 INFO L226 Difference]: Without dead ends: 10 [2021-10-20 06:00:30,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:00:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-20 06:00:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2021-10-20 06:00:30,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:00:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-20 06:00:30,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 3 [2021-10-20 06:00:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:00:30,412 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-20 06:00:30,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:00:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-20 06:00:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-20 06:00:30,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:00:30,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-20 06:00:30,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 06:00:30,415 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-10-20 06:00:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:00:30,419 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2021-10-20 06:00:30,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:00:30,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279301591] [2021-10-20 06:00:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:00:30,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:00:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:00:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:00:30,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:00:30,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279301591] [2021-10-20 06:00:30,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279301591] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:00:30,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:00:30,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-20 06:00:30,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044233524] [2021-10-20 06:00:30,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:00:30,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:00:30,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:00:30,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:00:30,506 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:00:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:00:30,515 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2021-10-20 06:00:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:00:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-20 06:00:30,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:00:30,517 INFO L225 Difference]: With dead ends: 8 [2021-10-20 06:00:30,517 INFO L226 Difference]: Without dead ends: 7 [2021-10-20 06:00:30,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:00:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-20 06:00:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-20 06:00:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:00:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-20 06:00:30,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2021-10-20 06:00:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:00:30,522 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-20 06:00:30,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:00:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-20 06:00:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-20 06:00:30,524 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:00:30,524 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-10-20 06:00:30,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 06:00:30,525 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-10-20 06:00:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:00:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash 925739309, now seen corresponding path program 1 times [2021-10-20 06:00:30,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:00:30,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800931458] [2021-10-20 06:00:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:00:30,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:00:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:00:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:00:30,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:00:30,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800931458] [2021-10-20 06:00:30,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800931458] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 06:00:30,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339818212] [2021-10-20 06:00:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:00:30,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:00:30,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:00:30,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:00:30,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 06:00:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:00:30,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-20 06:00:30,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:00:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:00:30,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:00:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:00:30,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339818212] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:00:30,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505781781] [2021-10-20 06:00:30,846 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-20 06:00:30,847 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:00:30,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:00:30,859 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:00:30,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:00:30,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:00:30,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-20 06:00:30,945 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.2 percent of original size [2021-10-20 06:00:30,952 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-20 06:00:30,958 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:00:31,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1505781781] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:00:31,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-20 06:00:31,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3, 3] total 5 [2021-10-20 06:00:31,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795460255] [2021-10-20 06:00:31,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:00:31,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:00:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:00:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-20 06:00:31,018 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:00:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:00:31,028 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2021-10-20 06:00:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:00:31,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-20 06:00:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:00:31,029 INFO L225 Difference]: With dead ends: 7 [2021-10-20 06:00:31,029 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 06:00:31,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-20 06:00:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 06:00:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 06:00:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:00:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 06:00:31,031 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-10-20 06:00:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:00:31,032 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 06:00:31,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:00:31,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 06:00:31,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 06:00:31,036 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-20 06:00:31,036 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-20 06:00:31,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-20 06:00:31,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:00:31,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-20 06:00:31,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:00:31,279 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 28) no Hoare annotation was computed. [2021-10-20 06:00:31,279 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-20 06:00:31,280 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 28) no Hoare annotation was computed. [2021-10-20 06:00:31,280 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-20 06:00:31,280 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-20 06:00:31,280 INFO L857 garLoopResultBuilder]: For program point L28-1(line 28) no Hoare annotation was computed. [2021-10-20 06:00:31,280 INFO L853 garLoopResultBuilder]: At program point L27-2(lines 27 30) the Hoare annotation is: (and (<= ULTIMATE.start_main_~z~0 2147483647) (<= 0 (+ ULTIMATE.start_main_~y~0 2147483648)) (<= ULTIMATE.start_main_~y~0 2147483647) (<= 0 (+ ULTIMATE.start_main_~z~0 2147483648)) (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648))) [2021-10-20 06:00:31,284 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 06:00:31,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:00:31 BoogieIcfgContainer [2021-10-20 06:00:31,299 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 06:00:31,300 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 06:00:31,300 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 06:00:31,300 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 06:00:31,301 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:00:29" (3/4) ... [2021-10-20 06:00:31,304 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 06:00:31,313 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-20 06:00:31,313 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-20 06:00:31,313 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 06:00:31,347 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 06:00:31,347 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 06:00:31,349 INFO L168 Benchmark]: Toolchain (without parser) took 2055.60 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 52.6 MB in the beginning and 62.3 MB in the end (delta: -9.8 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2021-10-20 06:00:31,349 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory was 68.8 MB in the beginning and 68.7 MB in the end (delta: 69.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:00:31,350 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.91 ms. Allocated memory is still 88.1 MB. Free memory was 52.4 MB in the beginning and 66.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 06:00:31,351 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.62 ms. Allocated memory is still 88.1 MB. Free memory was 66.5 MB in the beginning and 65.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:00:31,351 INFO L168 Benchmark]: Boogie Preprocessor took 18.58 ms. Allocated memory is still 88.1 MB. Free memory was 65.1 MB in the beginning and 64.2 MB in the end (delta: 847.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:00:31,352 INFO L168 Benchmark]: RCFGBuilder took 296.55 ms. Allocated memory is still 88.1 MB. Free memory was 64.2 MB in the beginning and 55.8 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 06:00:31,353 INFO L168 Benchmark]: TraceAbstraction took 1424.87 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 55.3 MB in the beginning and 65.0 MB in the end (delta: -9.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2021-10-20 06:00:31,354 INFO L168 Benchmark]: Witness Printer took 47.96 ms. Allocated memory is still 109.1 MB. Free memory was 64.4 MB in the beginning and 62.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:00:31,358 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory was 68.8 MB in the beginning and 68.7 MB in the end (delta: 69.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 229.91 ms. Allocated memory is still 88.1 MB. Free memory was 52.4 MB in the beginning and 66.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.62 ms. Allocated memory is still 88.1 MB. Free memory was 66.5 MB in the beginning and 65.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.58 ms. Allocated memory is still 88.1 MB. Free memory was 65.1 MB in the beginning and 64.2 MB in the end (delta: 847.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 296.55 ms. Allocated memory is still 88.1 MB. Free memory was 64.2 MB in the beginning and 55.8 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1424.87 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 55.3 MB in the beginning and 65.0 MB in the end (delta: -9.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * Witness Printer took 47.96 ms. Allocated memory is still 109.1 MB. Free memory was 64.4 MB in the beginning and 62.3 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: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 28]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 28]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1332.6ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 12.3ms, AutomataDifference: 186.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 30.4ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 10 SDslu, 2 SDs, 0 SdLazy, 23 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 167.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=1, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.1ms AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 1 NumberOfFragments, 25 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 10.5ms HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 14.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 15.0ms SsaConstructionTime, 55.7ms SatisfiabilityAnalysisTime, 352.8ms InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 66 SizeOfPredicates, 3 NumberOfNonLiveVariables, 23 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 113, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 3, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 7, TOOLS_POST_TIME[ms]: 50, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 7, TOOLS_QUANTIFIERELIM_TIME[ms]: 46, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 28, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 16, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME[ms]: 2, DOMAIN_ISBOTTOM_APPLICATIONS: 3, DOMAIN_ISBOTTOM_TIME[ms]: 3, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 25, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 25, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 3, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 17, DAG_COMPRESSION_PROCESSED_NODES: 28, DAG_COMPRESSION_RETAINED_NODES: 18, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((z <= 2147483647 && 0 <= y + 2147483648) && y <= 2147483647) && 0 <= z + 2147483648) && x <= 2147483647) && 0 <= x + 2147483648 RESULT: Ultimate proved your program to be correct! [2021-10-20 06:00:31,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af84aabf-f49e-497d-a36c-1f1f32b5dae4/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...