./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_24-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/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_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_24-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccb5d8d533f248ce9cbf3b135241b499fec47cdc .............................................................................................................................................................................................................................................................................................................................................................................. 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 02:29:26,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:26,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:26,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:26,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:26,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:26,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:26,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:26,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:26,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:26,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:26,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:26,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:26,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:26,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:26,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:26,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:26,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:26,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:26,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:26,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:26,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:26,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:26,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:26,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:26,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:26,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:26,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:26,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:26,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:26,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:26,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:26,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:26,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:26,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:26,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:26,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:26,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:26,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:26,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:26,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:26,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:29:26,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:26,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:26,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:26,625 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:26,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:26,625 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:26,625 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:29:26,626 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:26,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:26,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:29:26,626 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:29:26,626 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:26,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:29:26,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:29:26,627 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:29:26,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:26,628 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:29:26,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:29:26,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:29:26,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:26,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:26,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:26,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:26,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:29:26,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:29:26,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:26,631 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:26,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:26,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:26,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:26,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:26,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:26,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:26,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:26,633 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:29:26,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:29:26,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:26,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:26,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:26,634 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_326f68d1-590a-42bb-aaa8-8202a869a946/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccb5d8d533f248ce9cbf3b135241b499fec47cdc [2021-10-11 02:29:26,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:26,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:26,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:26,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:26,902 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:26,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-examples/sanfoundry_24-1.i [2021-10-11 02:29:26,998 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI/data/56f9b4a58/b6c6ff593fa543ce93bd7499d5b226a1/FLAG87875ed72 [2021-10-11 02:29:27,562 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:27,562 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/sv-benchmarks/c/array-examples/sanfoundry_24-1.i [2021-10-11 02:29:27,568 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI/data/56f9b4a58/b6c6ff593fa543ce93bd7499d5b226a1/FLAG87875ed72 [2021-10-11 02:29:27,933 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI/data/56f9b4a58/b6c6ff593fa543ce93bd7499d5b226a1 [2021-10-11 02:29:27,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:27,941 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:27,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:27,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:27,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:27,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ddf3624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27, skipping insertion in model container [2021-10-11 02:29:27,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:27,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:28,172 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/sv-benchmarks/c/array-examples/sanfoundry_24-1.i[848,861] [2021-10-11 02:29:28,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:28,200 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:28,213 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/sv-benchmarks/c/array-examples/sanfoundry_24-1.i[848,861] [2021-10-11 02:29:28,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:28,234 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:28,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28 WrapperNode [2021-10-11 02:29:28,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:28,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:28,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:28,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:28,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (1/1) ... [2021-10-11 02:29:28,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (1/1) ... [2021-10-11 02:29:28,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:28,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:28,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:28,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:28,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (1/1) ... [2021-10-11 02:29:28,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (1/1) ... [2021-10-11 02:29:28,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (1/1) ... [2021-10-11 02:29:28,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (1/1) ... [2021-10-11 02:29:28,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (1/1) ... [2021-10-11 02:29:28,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (1/1) ... [2021-10-11 02:29:28,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (1/1) ... [2021-10-11 02:29:28,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:28,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:28,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:28,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:28,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/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 02:29:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:29:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:29:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:28,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:28,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:29:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:29:28,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:28,917 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-11 02:29:28,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:28 BoogieIcfgContainer [2021-10-11 02:29:28,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:28,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:28,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:28,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:28,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:27" (1/3) ... [2021-10-11 02:29:28,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f51739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:28, skipping insertion in model container [2021-10-11 02:29:28,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:28" (2/3) ... [2021-10-11 02:29:28,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f51739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:28, skipping insertion in model container [2021-10-11 02:29:28,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:28" (3/3) ... [2021-10-11 02:29:28,932 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-1.i [2021-10-11 02:29:28,946 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:28,950 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-10-11 02:29:28,962 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-11 02:29:29,003 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:29,003 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:29,004 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:29,004 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:29,004 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:29,004 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:29,004 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:29,004 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-10-11 02:29:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:29:29,024 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:29,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:29:29,025 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:29,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1036043315, now seen corresponding path program 1 times [2021-10-11 02:29:29,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:29,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682839701] [2021-10-11 02:29:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:29,369 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 02:29:29,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682839701] [2021-10-11 02:29:29,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:29,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:29:29,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083859160] [2021-10-11 02:29:29,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:29:29,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:29,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:29:29,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:29,396 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2021-10-11 02:29:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:29,523 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-10-11 02:29:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:29:29,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 02:29:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:29,538 INFO L225 Difference]: With dead ends: 50 [2021-10-11 02:29:29,538 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:29:29,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:29:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2021-10-11 02:29:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:29:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-10-11 02:29:29,572 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 6 [2021-10-11 02:29:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:29,572 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-10-11 02:29:29,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:29:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-10-11 02:29:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:29:29,573 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:29,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:29,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:29:29,574 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:29,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2108998760, now seen corresponding path program 1 times [2021-10-11 02:29:29,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:29,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142756948] [2021-10-11 02:29:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:29:29,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142756948] [2021-10-11 02:29:29,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:29,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:29:29,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622601679] [2021-10-11 02:29:29,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:29:29,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:29:29,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:29,754 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 4 states. [2021-10-11 02:29:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:29,813 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2021-10-11 02:29:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:29:29,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:29:29,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:29,814 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:29:29,814 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:29:29,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:29:29,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2021-10-11 02:29:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 02:29:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-10-11 02:29:29,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2021-10-11 02:29:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:29,819 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-10-11 02:29:29,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:29:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-10-11 02:29:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:29:29,820 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:29,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:29,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:29:29,821 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:29,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1942167699, now seen corresponding path program 1 times [2021-10-11 02:29:29,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:29,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013049136] [2021-10-11 02:29:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:29:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013049136] [2021-10-11 02:29:29,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:29,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:29:29,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096762781] [2021-10-11 02:29:29,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:29:29,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:29,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:29:29,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:29,930 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2021-10-11 02:29:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:30,022 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-10-11 02:29:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:29:30,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:29:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:30,025 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:29:30,025 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:29:30,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:29:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:29:30,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:29:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:29:30,027 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-10-11 02:29:30,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:30,027 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:29:30,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:29:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:29:30,028 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:29:30,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:29:30,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:29:30,041 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-11 02:29:30,042 INFO L265 CegarLoopResult]: At program point L27-3(lines 27 30) the Hoare annotation is: true [2021-10-11 02:29:30,042 INFO L262 CegarLoopResult]: For program point L32-2(lines 32 38) no Hoare annotation was computed. [2021-10-11 02:29:30,042 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:29:30,042 INFO L265 CegarLoopResult]: At program point L32-3(lines 32 38) the Hoare annotation is: true [2021-10-11 02:29:30,042 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-11 02:29:30,042 INFO L262 CegarLoopResult]: For program point L41(lines 41 44) no Hoare annotation was computed. [2021-10-11 02:29:30,043 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:29:30,043 INFO L262 CegarLoopResult]: For program point L34(lines 34 37) no Hoare annotation was computed. [2021-10-11 02:29:30,043 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2021-10-11 02:29:30,043 INFO L262 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2021-10-11 02:29:30,043 INFO L262 CegarLoopResult]: For program point L14-3(lines 1 47) no Hoare annotation was computed. [2021-10-11 02:29:30,043 INFO L262 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2021-10-11 02:29:30,044 INFO L262 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2021-10-11 02:29:30,044 INFO L262 CegarLoopResult]: For program point L14-7(lines 1 47) no Hoare annotation was computed. [2021-10-11 02:29:30,044 INFO L262 CegarLoopResult]: For program point L39-2(lines 39 45) no Hoare annotation was computed. [2021-10-11 02:29:30,044 INFO L265 CegarLoopResult]: At program point L39-3(lines 39 45) the Hoare annotation is: true [2021-10-11 02:29:30,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:30 BoogieIcfgContainer [2021-10-11 02:29:30,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:30,053 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:30,053 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:30,054 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:30,054 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:28" (3/4) ... [2021-10-11 02:29:30,057 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:29:30,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-11 02:29:30,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-11 02:29:30,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:29:30,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:29:30,112 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_326f68d1-590a-42bb-aaa8-8202a869a946/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:29:30,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:30,114 INFO L168 Benchmark]: Toolchain (without parser) took 2172.67 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 70.4 MB in the beginning and 94.7 MB in the end (delta: -24.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:30,115 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 102.8 MB. Free memory was 58.0 MB in the beginning and 57.9 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:30,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.88 ms. Allocated memory is still 102.8 MB. Free memory was 70.2 MB in the beginning and 78.5 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:30,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.92 ms. Allocated memory is still 102.8 MB. Free memory was 78.5 MB in the beginning and 76.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:30,117 INFO L168 Benchmark]: Boogie Preprocessor took 26.08 ms. Allocated memory is still 102.8 MB. Free memory was 76.9 MB in the beginning and 75.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:30,117 INFO L168 Benchmark]: RCFGBuilder took 622.28 ms. Allocated memory is still 102.8 MB. Free memory was 75.7 MB in the beginning and 56.1 MB in the end (delta: 19.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:30,118 INFO L168 Benchmark]: TraceAbstraction took 1130.58 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 55.7 MB in the beginning and 97.4 MB in the end (delta: -41.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:30,118 INFO L168 Benchmark]: Witness Printer took 59.57 ms. Allocated memory is still 123.7 MB. Free memory was 96.7 MB in the beginning and 94.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:30,122 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 102.8 MB. Free memory was 58.0 MB in the beginning and 57.9 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.88 ms. Allocated memory is still 102.8 MB. Free memory was 70.2 MB in the beginning and 78.5 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.92 ms. Allocated memory is still 102.8 MB. Free memory was 78.5 MB in the beginning and 76.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.08 ms. Allocated memory is still 102.8 MB. Free memory was 76.9 MB in the beginning and 75.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 622.28 ms. Allocated memory is still 102.8 MB. Free memory was 75.7 MB in the beginning and 56.1 MB in the end (delta: 19.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1130.58 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 55.7 MB in the beginning and 97.4 MB in the end (delta: -41.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 59.57 ms. Allocated memory is still 123.7 MB. Free memory was 96.7 MB in the beginning and 94.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 35 SDslu, 51 SDs, 0 SdLazy, 78 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=1, 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, 3 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 11 NumberOfFragments, 3 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 463 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 3/3 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...