./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/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_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10bdb405bd6bca2bddb8b686c44dad291e109402 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:25:59,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:25:59,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:25:59,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:25:59,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:25:59,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:25:59,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:25:59,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:25:59,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:25:59,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:25:59,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:25:59,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:25:59,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:25:59,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:25:59,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:25:59,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:25:59,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:25:59,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:25:59,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:25:59,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:25:59,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:25:59,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:25:59,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:25:59,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:25:59,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:25:59,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:25:59,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:25:59,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:25:59,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:25:59,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:25:59,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:25:59,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:25:59,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:25:59,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:25:59,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:25:59,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:25:59,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:25:59,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:25:59,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:25:59,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:25:59,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:25:59,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:25:59,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:25:59,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:25:59,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:25:59,711 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:25:59,711 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:25:59,711 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:25:59,712 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:25:59,712 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:25:59,712 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:25:59,712 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:25:59,713 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:25:59,714 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:25:59,714 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:25:59,714 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:25:59,714 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:25:59,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:25:59,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:25:59,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:25:59,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:25:59,717 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:25:59,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:25:59,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:25:59,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:25:59,718 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:25:59,718 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:25:59,718 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:25:59,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:25:59,718 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:25:59,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:25:59,719 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:25:59,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:25:59,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:25:59,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:25:59,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:25:59,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:25:59,720 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:25:59,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:25:59,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:25:59,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:25:59,721 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_51e34ee5-1f45-4129-b1d0-be5f6f139873/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10bdb405bd6bca2bddb8b686c44dad291e109402 [2021-10-11 02:25:59,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:00,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:00,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:00,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:00,022 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:00,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2021-10-11 02:26:00,093 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/data/e651fbb5e/c35365d0ed8f4803882b28ca4065ae67/FLAG738ddbbe8 [2021-10-11 02:26:00,594 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:00,595 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2021-10-11 02:26:00,609 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/data/e651fbb5e/c35365d0ed8f4803882b28ca4065ae67/FLAG738ddbbe8 [2021-10-11 02:26:00,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/data/e651fbb5e/c35365d0ed8f4803882b28ca4065ae67 [2021-10-11 02:26:00,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:00,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:00,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:00,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:00,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:00,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b73694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00, skipping insertion in model container [2021-10-11 02:26:00,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:01,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:01,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:01,364 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:01,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:01,450 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:01,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01 WrapperNode [2021-10-11 02:26:01,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:01,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:01,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:01,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:01,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (1/1) ... [2021-10-11 02:26:01,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (1/1) ... [2021-10-11 02:26:01,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:01,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:01,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:01,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:01,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (1/1) ... [2021-10-11 02:26:01,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (1/1) ... [2021-10-11 02:26:01,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (1/1) ... [2021-10-11 02:26:01,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (1/1) ... [2021-10-11 02:26:01,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (1/1) ... [2021-10-11 02:26:01,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (1/1) ... [2021-10-11 02:26:01,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (1/1) ... [2021-10-11 02:26:01,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:01,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:01,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:01,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:01,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:26:01,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:01,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:26:01,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:01,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:02,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:02,143 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:26:02,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:02 BoogieIcfgContainer [2021-10-11 02:26:02,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:02,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:02,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:02,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:02,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:00" (1/3) ... [2021-10-11 02:26:02,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1eca7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:02, skipping insertion in model container [2021-10-11 02:26:02,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:01" (2/3) ... [2021-10-11 02:26:02,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1eca7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:02, skipping insertion in model container [2021-10-11 02:26:02,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:02" (3/3) ... [2021-10-11 02:26:02,155 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemset-alloca-1.i [2021-10-11 02:26:02,169 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:02,172 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-10-11 02:26:02,183 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-11 02:26:02,204 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:02,204 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:26:02,204 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:02,204 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:02,205 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:02,205 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:02,205 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:02,205 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:26:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:26:02,223 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:02,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:26:02,224 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:26:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:02,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2609821, now seen corresponding path program 1 times [2021-10-11 02:26:02,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:02,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072535652] [2021-10-11 02:26:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:02,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072535652] [2021-10-11 02:26:02,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:02,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:02,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473292080] [2021-10-11 02:26:02,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:26:02,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:02,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:26:02,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:02,455 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 5 states. [2021-10-11 02:26:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:02,566 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-11 02:26:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:26:02,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2021-10-11 02:26:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:02,576 INFO L225 Difference]: With dead ends: 11 [2021-10-11 02:26:02,577 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:26:02,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:26:02,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:26:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-10-11 02:26:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:26:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 02:26:02,609 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2021-10-11 02:26:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:02,610 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 02:26:02,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:26:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 02:26:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:26:02,610 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:02,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:26:02,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:02,611 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:26:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:02,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2609822, now seen corresponding path program 1 times [2021-10-11 02:26:02,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:02,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109737205] [2021-10-11 02:26:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:02,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109737205] [2021-10-11 02:26:02,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:02,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:02,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480363345] [2021-10-11 02:26:02,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:26:02,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:02,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:26:02,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:02,745 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2021-10-11 02:26:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:02,801 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-11 02:26:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:26:02,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2021-10-11 02:26:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:02,803 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:26:02,803 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:26:02,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:26:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:26:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2021-10-11 02:26:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:26:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 02:26:02,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2021-10-11 02:26:02,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:02,807 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 02:26:02,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:26:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 02:26:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:26:02,808 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:02,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:26:02,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:26:02,809 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:26:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:02,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2629898, now seen corresponding path program 1 times [2021-10-11 02:26:02,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:02,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470631848] [2021-10-11 02:26:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:02,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470631848] [2021-10-11 02:26:02,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:02,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:02,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052956771] [2021-10-11 02:26:02,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:02,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:02,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:02,910 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2021-10-11 02:26:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:02,926 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-10-11 02:26:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:02,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:26:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:02,927 INFO L225 Difference]: With dead ends: 11 [2021-10-11 02:26:02,927 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:26:02,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:26:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:26:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:26:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-11 02:26:02,930 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2021-10-11 02:26:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:02,930 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-11 02:26:02,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-11 02:26:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:26:02,931 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:02,931 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-11 02:26:02,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:26:02,931 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:26:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:02,932 INFO L82 PathProgramCache]: Analyzing trace with hash 440602860, now seen corresponding path program 1 times [2021-10-11 02:26:02,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:02,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850844399] [2021-10-11 02:26:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:03,112 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 02:26:03,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850844399] [2021-10-11 02:26:03,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033143741] [2021-10-11 02:26:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:03,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-11 02:26:03,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:03,285 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 02:26:03,286 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:26:03,294 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:26:03,295 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:26:03,296 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 02:26:03,591 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 02:26:03,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:03,797 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 02:26:03,905 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 02:26:03,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1774327305] [2021-10-11 02:26:03,938 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:26:03,938 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:03,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:03,951 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:03,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:04,178 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-10-11 02:26:04,974 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:05,266 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-10-11 02:26:05,609 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-10-11 02:26:05,928 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-10-11 02:26:06,013 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:06,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:06,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2021-10-11 02:26:06,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967731218] [2021-10-11 02:26:06,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-10-11 02:26:06,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:06,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-11 02:26:06,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-10-11 02:26:06,020 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2021-10-11 02:26:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:06,387 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-10-11 02:26:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:26:06,388 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 7 [2021-10-11 02:26:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:06,390 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:26:06,390 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:26:06,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-10-11 02:26:06,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:26:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-11 02:26:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:26:06,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-11 02:26:06,397 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2021-10-11 02:26:06,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:06,397 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-11 02:26:06,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-10-11 02:26:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-11 02:26:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:26:06,398 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:06,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:06,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-11 02:26:06,625 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:26:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:06,625 INFO L82 PathProgramCache]: Analyzing trace with hash 440601794, now seen corresponding path program 1 times [2021-10-11 02:26:06,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:06,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492564440] [2021-10-11 02:26:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:06,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492564440] [2021-10-11 02:26:06,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:06,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:06,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14680506] [2021-10-11 02:26:06,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:06,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:06,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:06,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:06,684 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2021-10-11 02:26:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:06,693 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-10-11 02:26:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:06,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:26:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:06,695 INFO L225 Difference]: With dead ends: 13 [2021-10-11 02:26:06,695 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:26:06,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:26:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:26:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:26:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-11 02:26:06,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-10-11 02:26:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:06,698 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-11 02:26:06,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-11 02:26:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:26:06,699 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:06,699 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2021-10-11 02:26:06,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-11 02:26:06,700 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:26:06,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:06,700 INFO L82 PathProgramCache]: Analyzing trace with hash 580552670, now seen corresponding path program 2 times [2021-10-11 02:26:06,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:06,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816566785] [2021-10-11 02:26:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:06,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816566785] [2021-10-11 02:26:06,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614721302] [2021-10-11 02:26:06,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:06,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:26:06,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:06,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-11 02:26:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:07,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:07,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72245355] [2021-10-11 02:26:07,815 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:26:07,815 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:07,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:07,815 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:07,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:08,290 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:08,598 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-10-11 02:26:08,932 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-10-11 02:26:09,218 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-10-11 02:26:09,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:09,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:09,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2021-10-11 02:26:09,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923469462] [2021-10-11 02:26:09,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-10-11 02:26:09,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:09,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-11 02:26:09,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-10-11 02:26:09,305 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 26 states. [2021-10-11 02:26:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,166 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-10-11 02:26:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 02:26:10,167 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 10 [2021-10-11 02:26:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,167 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:26:10,167 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:26:10,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2021-10-11 02:26:10,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:26:10,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 02:26:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:26:10,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-11 02:26:10,171 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2021-10-11 02:26:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,172 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-11 02:26:10,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-10-11 02:26:10,172 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-11 02:26:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:26:10,173 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,173 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1] [2021-10-11 02:26:10,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:10,374 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:26:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:10,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1511687788, now seen corresponding path program 3 times [2021-10-11 02:26:10,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:10,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324656403] [2021-10-11 02:26:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:10,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324656403] [2021-10-11 02:26:10,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312985096] [2021-10-11 02:26:10,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:10,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:26:10,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:26:10,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-11 02:26:10,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:11,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:12,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321050281] [2021-10-11 02:26:12,503 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:26:12,503 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:12,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:12,504 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:12,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:13,065 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:13,421 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-10-11 02:26:13,691 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-10-11 02:26:14,088 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2021-10-11 02:26:14,391 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-10-11 02:26:14,533 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:26:14,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:14,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2021-10-11 02:26:14,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375317599] [2021-10-11 02:26:14,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-10-11 02:26:14,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:14,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-11 02:26:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-10-11 02:26:14,537 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 41 states. [2021-10-11 02:26:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:16,190 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-10-11 02:26:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-11 02:26:16,191 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 19 [2021-10-11 02:26:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:16,191 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:26:16,192 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:26:16,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=475, Invalid=3815, Unknown=0, NotChecked=0, Total=4290 [2021-10-11 02:26:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:26:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:26:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:26:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:26:16,195 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-10-11 02:26:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:16,195 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:26:16,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-10-11 02:26:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:26:16,195 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:26:16,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:16,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:16 BoogieIcfgContainer [2021-10-11 02:26:16,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:16,414 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:16,414 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:16,415 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:16,415 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:02" (3/4) ... [2021-10-11 02:26:16,418 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:26:16,429 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-11 02:26:16,430 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:26:16,430 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 02:26:16,465 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e34ee5-1f45-4129-b1d0-be5f6f139873/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:26:16,465 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:16,466 INFO L168 Benchmark]: Toolchain (without parser) took 15540.97 ms. Allocated memory was 123.7 MB in the beginning and 281.0 MB in the end (delta: 157.3 MB). Free memory was 90.5 MB in the beginning and 99.9 MB in the end (delta: -9.3 MB). Peak memory consumption was 148.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,467 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory is still 40.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:16,467 INFO L168 Benchmark]: CACSL2BoogieTranslator took 523.07 ms. Allocated memory is still 123.7 MB. Free memory was 90.5 MB in the beginning and 88.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,468 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.68 ms. Allocated memory is still 123.7 MB. Free memory was 88.8 MB in the beginning and 87.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,468 INFO L168 Benchmark]: Boogie Preprocessor took 57.56 ms. Allocated memory is still 123.7 MB. Free memory was 87.2 MB in the beginning and 85.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,469 INFO L168 Benchmark]: RCFGBuilder took 572.90 ms. Allocated memory is still 123.7 MB. Free memory was 85.6 MB in the beginning and 63.0 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,469 INFO L168 Benchmark]: TraceAbstraction took 14266.48 ms. Allocated memory was 123.7 MB in the beginning and 281.0 MB in the end (delta: 157.3 MB). Free memory was 62.5 MB in the beginning and 102.5 MB in the end (delta: -40.0 MB). Peak memory consumption was 119.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,470 INFO L168 Benchmark]: Witness Printer took 51.33 ms. Allocated memory is still 281.0 MB. Free memory was 102.5 MB in the beginning and 99.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,472 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory is still 40.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 523.07 ms. Allocated memory is still 123.7 MB. Free memory was 90.5 MB in the beginning and 88.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.68 ms. Allocated memory is still 123.7 MB. Free memory was 88.8 MB in the beginning and 87.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.56 ms. Allocated memory is still 123.7 MB. Free memory was 87.2 MB in the beginning and 85.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 572.90 ms. Allocated memory is still 123.7 MB. Free memory was 85.6 MB in the beginning and 63.0 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14266.48 ms. Allocated memory was 123.7 MB in the beginning and 281.0 MB in the end (delta: 157.3 MB). Free memory was 62.5 MB in the beginning and 102.5 MB in the end (delta: -40.0 MB). Peak memory consumption was 119.8 MB. Max. memory is 16.1 GB. * Witness Printer took 51.33 ms. Allocated memory is still 281.0 MB. Free memory was 102.5 MB in the beginning and 99.9 MB in the end (delta: 2.7 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: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 523]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.2s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 22 SDslu, 55 SDs, 0 SdLazy, 684 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=6, 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, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 26994 SizeOfPredicates, 39 NumberOfNonLiveVariables, 318 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 15/147 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...