./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/mod4.c --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_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/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_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invariants/mod4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/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_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/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 373d4d4747604d1981d4f1ca63ff09df143512c0 ........................................................................................................................................................................................................................................................................................................................................................................... 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 02:22:41,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:22:41,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:22:41,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:22:41,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:22:41,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:22:41,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:22:41,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:22:41,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:22:41,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:22:41,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:22:41,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:22:41,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:22:41,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:22:41,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:22:41,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:22:41,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:22:41,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:22:41,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:22:41,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:22:41,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:22:41,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:22:41,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:22:41,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:22:41,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:22:41,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:22:41,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:22:41,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:22:41,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:22:41,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:22:41,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:22:41,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:22:41,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:22:41,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:22:41,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:22:41,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:22:41,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:22:41,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:22:41,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:22:41,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:22:41,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:22:41,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:22:42,009 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:22:42,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:22:42,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:22:42,011 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:22:42,011 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:22:42,012 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:22:42,012 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:22:42,012 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:22:42,018 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:22:42,019 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:22:42,020 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:22:42,020 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:22:42,020 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:22:42,021 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:22:42,021 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:22:42,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:22:42,022 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:22:42,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:22:42,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:22:42,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:22:42,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:22:42,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:22:42,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:22:42,024 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:22:42,024 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:22:42,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:22:42,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:22:42,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:22:42,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:22:42,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:22:42,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:22:42,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:22:42,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:22:42,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:22:42,028 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:22:42,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:22:42,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:22:42,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:22:42,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:22:42,029 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_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 373d4d4747604d1981d4f1ca63ff09df143512c0 [2021-10-11 02:22:42,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:22:42,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:22:42,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:22:42,376 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:22:42,377 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:22:42,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/loop-invariants/mod4.c [2021-10-11 02:22:42,452 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/bin/utaipan-WLngWcDbfI/data/704a6c2a7/128c4b7af485409c9492930d4b7ccf8a/FLAGf4fa9710b [2021-10-11 02:22:42,892 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:22:42,892 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/sv-benchmarks/c/loop-invariants/mod4.c [2021-10-11 02:22:42,899 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/bin/utaipan-WLngWcDbfI/data/704a6c2a7/128c4b7af485409c9492930d4b7ccf8a/FLAGf4fa9710b [2021-10-11 02:22:43,262 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/bin/utaipan-WLngWcDbfI/data/704a6c2a7/128c4b7af485409c9492930d4b7ccf8a [2021-10-11 02:22:43,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:22:43,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:22:43,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:43,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:22:43,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:22:43,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea70494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43, skipping insertion in model container [2021-10-11 02:22:43,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:22:43,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:22:43,485 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_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/sv-benchmarks/c/loop-invariants/mod4.c[351,364] [2021-10-11 02:22:43,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:43,509 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:22:43,523 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_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/sv-benchmarks/c/loop-invariants/mod4.c[351,364] [2021-10-11 02:22:43,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:43,540 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:22:43,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43 WrapperNode [2021-10-11 02:22:43,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:43,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:43,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:22:43,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:22:43,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:43,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:22:43,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:22:43,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:22:43,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (1/1) ... [2021-10-11 02:22:43,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:22:43,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:22:43,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:22:43,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:22:43,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/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 02:22:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:22:43,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:22:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:22:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:22:43,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:22:43,978 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:22:43,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:43 BoogieIcfgContainer [2021-10-11 02:22:43,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:22:43,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:22:43,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:22:43,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:22:43,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:22:43" (1/3) ... [2021-10-11 02:22:43,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369c1875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:43, skipping insertion in model container [2021-10-11 02:22:43,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43" (2/3) ... [2021-10-11 02:22:43,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369c1875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:43, skipping insertion in model container [2021-10-11 02:22:43,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:43" (3/3) ... [2021-10-11 02:22:43,998 INFO L111 eAbstractionObserver]: Analyzing ICFG mod4.c [2021-10-11 02:22:44,017 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:22:44,020 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:22:44,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:22:44,052 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:22:44,052 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:22:44,052 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:22:44,052 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:22:44,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:22:44,053 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:22:44,053 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:22:44,053 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:22:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2021-10-11 02:22:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:22:44,072 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:44,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:22:44,073 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:44,079 INFO L82 PathProgramCache]: Analyzing trace with hash 57691362, now seen corresponding path program 1 times [2021-10-11 02:22:44,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:44,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427267198] [2021-10-11 02:22:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:44,213 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 02:22:44,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427267198] [2021-10-11 02:22:44,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:44,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:22:44,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557135459] [2021-10-11 02:22:44,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:22:44,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:44,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:22:44,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:22:44,235 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 2 states. [2021-10-11 02:22:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:44,248 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-11 02:22:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:22:44,250 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2021-10-11 02:22:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:44,257 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:22:44,257 INFO L226 Difference]: Without dead ends: 7 [2021-10-11 02:22:44,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:22:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-11 02:22:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-11 02:22:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 02:22:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-11 02:22:44,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-11 02:22:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:44,291 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-11 02:22:44,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:22:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-11 02:22:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:22:44,291 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:44,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:22:44,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:22:44,292 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1781785905, now seen corresponding path program 1 times [2021-10-11 02:22:44,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:44,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745216724] [2021-10-11 02:22:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:44,370 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 02:22:44,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745216724] [2021-10-11 02:22:44,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:44,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:22:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637875574] [2021-10-11 02:22:44,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:22:44,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:44,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:22:44,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:22:44,391 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2021-10-11 02:22:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:44,431 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-11 02:22:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:22:44,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 02:22:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:44,433 INFO L225 Difference]: With dead ends: 13 [2021-10-11 02:22:44,433 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:22:44,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 02:22:44,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:22:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:22:44,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:22:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-11 02:22:44,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-10-11 02:22:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:44,447 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-11 02:22:44,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:22:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-11 02:22:44,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:22:44,448 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:44,448 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:44,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:22:44,448 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:44,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:44,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1347022100, now seen corresponding path program 1 times [2021-10-11 02:22:44,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:44,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617083115] [2021-10-11 02:22:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:44,580 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 02:22:44,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617083115] [2021-10-11 02:22:44,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478680536] [2021-10-11 02:22:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/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 02:22:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:44,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:22:44,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:44,688 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 02:22:44,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:44,721 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 02:22:44,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:22:44,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2021-10-11 02:22:44,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232285881] [2021-10-11 02:22:44,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:22:44,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:44,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:22:44,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:22:44,725 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2021-10-11 02:22:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:44,742 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-10-11 02:22:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:22:44,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:22:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:44,743 INFO L225 Difference]: With dead ends: 9 [2021-10-11 02:22:44,744 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:22:44,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:22:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:22:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:22:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:22:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:22:44,745 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-10-11 02:22:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:44,746 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:22:44,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:22:44,746 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:22:44,746 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:22:44,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:22:44,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:22:44,978 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:22:44,979 INFO L262 CegarLoopResult]: For program point L13-1(lines 13 15) no Hoare annotation was computed. [2021-10-11 02:22:44,979 INFO L258 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (= (mod ULTIMATE.start_main_~x~0 4) 0) [2021-10-11 02:22:44,979 INFO L262 CegarLoopResult]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2021-10-11 02:22:44,980 INFO L262 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-11 02:22:44,980 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:22:44,980 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-11 02:22:44,980 INFO L262 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-11 02:22:44,980 INFO L265 CegarLoopResult]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-10-11 02:22:44,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:22:44 BoogieIcfgContainer [2021-10-11 02:22:44,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:22:44,995 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:22:44,995 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:22:44,995 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:22:44,996 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:43" (3/4) ... [2021-10-11 02:22:44,999 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:22:45,010 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-11 02:22:45,010 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-11 02:22:45,010 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 02:22:45,010 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:22:45,011 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:22:45,043 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea4ec8-9422-4d00-80bd-36d6dbe3e11e/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:22:45,043 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:22:45,045 INFO L168 Benchmark]: Toolchain (without parser) took 1777.68 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.4 MB in the beginning and 64.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:45,046 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 70.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:45,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.93 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.3 MB in the beginning and 86.0 MB in the end (delta: -31.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:45,047 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.88 ms. Allocated memory is still 109.1 MB. Free memory was 86.0 MB in the beginning and 84.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:45,048 INFO L168 Benchmark]: Boogie Preprocessor took 22.60 ms. Allocated memory is still 109.1 MB. Free memory was 84.5 MB in the beginning and 83.5 MB in the end (delta: 953.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:45,049 INFO L168 Benchmark]: RCFGBuilder took 384.92 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 70.3 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:45,050 INFO L168 Benchmark]: TraceAbstraction took 1006.03 ms. Allocated memory is still 109.1 MB. Free memory was 69.8 MB in the beginning and 67.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:45,050 INFO L168 Benchmark]: Witness Printer took 48.80 ms. Allocated memory is still 109.1 MB. Free memory was 66.8 MB in the beginning and 64.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:45,054 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 90.2 MB. Free memory is still 70.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 271.93 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.3 MB in the beginning and 86.0 MB in the end (delta: -31.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.88 ms. Allocated memory is still 109.1 MB. Free memory was 86.0 MB in the beginning and 84.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.60 ms. Allocated memory is still 109.1 MB. Free memory was 84.5 MB in the beginning and 83.5 MB in the end (delta: 953.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 384.92 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 70.3 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1006.03 ms. Allocated memory is still 109.1 MB. Free memory was 69.8 MB in the beginning and 67.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Witness Printer took 48.80 ms. Allocated memory is still 109.1 MB. Free memory was 66.8 MB in the beginning and 64.7 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: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x % 4 == 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 2 SDslu, 11 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 6 HoareAnnotationTreeSize, 2 FomulaSimplifications, 10 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 779 SizeOfPredicates, 2 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 2/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...