./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/skippedu.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-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/skippedu.c -s /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan --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 188f1f6278f7b64d732f6e67466f6eb857ea2297 ............................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:11:19,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:11:19,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:11:19,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:11:19,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:11:19,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:11:19,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:11:19,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:11:19,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:11:19,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:11:19,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:11:19,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:11:19,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:11:19,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:11:19,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:11:19,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:11:19,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:11:19,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:11:19,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:11:19,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:11:19,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:11:19,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:11:19,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:11:19,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:11:19,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:11:19,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:11:19,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:11:19,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:11:19,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:11:19,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:11:19,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:11:19,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:11:19,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:11:19,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:11:19,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:11:19,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:11:19,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:11:19,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:11:19,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:11:19,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:11:19,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:11:19,953 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 04:11:19,972 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:11:19,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:11:19,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:11:19,973 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:11:19,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:11:19,973 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:11:19,974 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:11:19,974 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:11:19,974 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:11:19,974 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:11:19,974 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:11:19,974 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:11:19,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:11:19,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:11:19,980 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:11:19,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:11:19,980 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:11:19,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:11:19,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:11:19,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:11:19,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:11:19,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:11:19,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:11:19,981 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:11:19,981 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:11:19,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:11:19,981 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:11:19,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:11:19,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:11:19,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:11:19,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:11:19,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:11:19,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:11:19,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:11:19,983 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:11:19,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:11:19,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:11:19,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:11:19,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:11:19,983 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-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 188f1f6278f7b64d732f6e67466f6eb857ea2297 [2020-12-09 04:11:20,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:11:20,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:11:20,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:11:20,163 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:11:20,163 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:11:20,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/../../sv-benchmarks/c/array-tiling/skippedu.c [2020-12-09 04:11:20,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/data/756835f29/1997a0bbc7a940d48780a71f31968914/FLAG38f9117c6 [2020-12-09 04:11:20,574 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:11:20,574 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/sv-benchmarks/c/array-tiling/skippedu.c [2020-12-09 04:11:20,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/data/756835f29/1997a0bbc7a940d48780a71f31968914/FLAG38f9117c6 [2020-12-09 04:11:20,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/data/756835f29/1997a0bbc7a940d48780a71f31968914 [2020-12-09 04:11:20,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:11:20,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:11:20,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:11:20,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:11:20,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:11:20,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1d74e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20, skipping insertion in model container [2020-12-09 04:11:20,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:11:20,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:11:20,717 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/sv-benchmarks/c/array-tiling/skippedu.c[399,412] [2020-12-09 04:11:20,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:11:20,738 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:11:20,747 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/sv-benchmarks/c/array-tiling/skippedu.c[399,412] [2020-12-09 04:11:20,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:11:20,764 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:11:20,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20 WrapperNode [2020-12-09 04:11:20,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:11:20,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:11:20,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:11:20,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:11:20,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:11:20,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:11:20,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:11:20,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:11:20,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (1/1) ... [2020-12-09 04:11:20,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:11:20,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:11:20,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:11:20,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:11:20,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/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 [2020-12-09 04:11:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 04:11:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:11:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 04:11:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 04:11:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:11:20,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:11:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 04:11:21,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:11:21,169 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 04:11:21,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:11:21 BoogieIcfgContainer [2020-12-09 04:11:21,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:11:21,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:11:21,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:11:21,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:11:21,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:11:20" (1/3) ... [2020-12-09 04:11:21,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55dd8810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:11:21, skipping insertion in model container [2020-12-09 04:11:21,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:11:20" (2/3) ... [2020-12-09 04:11:21,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55dd8810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:11:21, skipping insertion in model container [2020-12-09 04:11:21,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:11:21" (3/3) ... [2020-12-09 04:11:21,178 INFO L111 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-12-09 04:11:21,191 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:11:21,194 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 04:11:21,204 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 04:11:21,220 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:11:21,220 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:11:21,221 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:11:21,221 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:11:21,221 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:11:21,221 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:11:21,221 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:11:21,221 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:11:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 04:11:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 04:11:21,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:11:21,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:11:21,235 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:11:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:11:21,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1961290255, now seen corresponding path program 1 times [2020-12-09 04:11:21,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:11:21,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631393012] [2020-12-09 04:11:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:11:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:11:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:11:21,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631393012] [2020-12-09 04:11:21,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:11:21,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:11:21,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685286205] [2020-12-09 04:11:21,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:11:21,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:11:21,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:11:21,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:11:21,391 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2020-12-09 04:11:21,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:11:21,425 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2020-12-09 04:11:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:11:21,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 04:11:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:11:21,431 INFO L225 Difference]: With dead ends: 24 [2020-12-09 04:11:21,432 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 04:11:21,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:11:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 04:11:21,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 04:11:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 04:11:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-09 04:11:21,454 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-09 04:11:21,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:11:21,455 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-09 04:11:21,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:11:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-09 04:11:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 04:11:21,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:11:21,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:11:21,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 04:11:21,456 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:11:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:11:21,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1674240844, now seen corresponding path program 1 times [2020-12-09 04:11:21,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:11:21,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560636860] [2020-12-09 04:11:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:11:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:11:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:11:21,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560636860] [2020-12-09 04:11:21,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338388111] [2020-12-09 04:11:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/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 [2020-12-09 04:11:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:11:21,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:11:21,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:11:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:11:21,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:11:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:11:21,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1097226034] [2020-12-09 04:11:21,645 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 04:11:21,645 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:11:21,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:11:21,652 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:11:21,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:11:22,197 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:11:22,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:11:22,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 4] total 11 [2020-12-09 04:11:22,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825713590] [2020-12-09 04:11:22,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:11:22,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:11:22,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:11:22,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-09 04:11:22,532 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 6 states. [2020-12-09 04:11:22,684 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-12-09 04:11:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:11:22,719 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2020-12-09 04:11:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 04:11:22,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-09 04:11:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:11:22,720 INFO L225 Difference]: With dead ends: 17 [2020-12-09 04:11:22,720 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 04:11:22,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-09 04:11:22,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 04:11:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-09 04:11:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 04:11:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-09 04:11:22,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-12-09 04:11:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:11:22,723 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-09 04:11:22,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:11:22,723 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-09 04:11:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 04:11:22,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:11:22,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:11:22,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 04:11:22,926 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:11:22,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:11:22,928 INFO L82 PathProgramCache]: Analyzing trace with hash 361140752, now seen corresponding path program 1 times [2020-12-09 04:11:22,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:11:22,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756258785] [2020-12-09 04:11:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:11:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:11:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:11:23,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756258785] [2020-12-09 04:11:23,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012918162] [2020-12-09 04:11:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:11:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:11:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 04:11:23,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:11:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:11:23,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:11:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:11:23,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [662823085] [2020-12-09 04:11:23,179 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 04:11:23,179 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:11:23,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:11:23,179 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:11:23,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:11:23,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:11:23,654 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:11:23,765 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-09 04:11:24,279 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:11:24,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:11:24,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-12-09 04:11:24,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261197201] [2020-12-09 04:11:24,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 04:11:24,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:11:24,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 04:11:24,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-09 04:11:24,281 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2020-12-09 04:11:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:11:24,303 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-12-09 04:11:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:11:24,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-09 04:11:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:11:24,304 INFO L225 Difference]: With dead ends: 21 [2020-12-09 04:11:24,304 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 04:11:24,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-09 04:11:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 04:11:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-09 04:11:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 04:11:24,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-09 04:11:24,307 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2020-12-09 04:11:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:11:24,307 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-09 04:11:24,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 04:11:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-09 04:11:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 04:11:24,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:11:24,308 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:11:24,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:11:24,510 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:11:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:11:24,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1996852053, now seen corresponding path program 2 times [2020-12-09 04:11:24,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:11:24,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972973692] [2020-12-09 04:11:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:11:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:11:24,584 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:11:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:11:24,610 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:11:24,624 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 04:11:24,624 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:11:24,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-12-09 04:11:24,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:11:24 BoogieIcfgContainer [2020-12-09 04:11:24,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:11:24,646 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:11:24,647 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:11:24,647 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:11:24,647 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:11:21" (3/4) ... [2020-12-09 04:11:24,648 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 04:11:24,677 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_375d0ad7-eac5-4413-ab6f-3ee7555bd387/bin/utaipan/witness.graphml [2020-12-09 04:11:24,677 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:11:24,678 INFO L168 Benchmark]: Toolchain (without parser) took 4075.05 ms. Allocated memory was 115.3 MB in the beginning and 182.5 MB in the end (delta: 67.1 MB). Free memory was 95.1 MB in the beginning and 69.5 MB in the end (delta: 25.7 MB). Peak memory consumption was 92.6 MB. Max. memory is 16.1 GB. [2020-12-09 04:11:24,679 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 73.4 MB. Free memory was 45.8 MB in the beginning and 45.7 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:11:24,679 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.08 ms. Allocated memory is still 115.3 MB. Free memory was 94.9 MB in the beginning and 84.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:11:24,680 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.50 ms. Allocated memory is still 115.3 MB. Free memory was 84.8 MB in the beginning and 83.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:11:24,680 INFO L168 Benchmark]: Boogie Preprocessor took 20.51 ms. Allocated memory is still 115.3 MB. Free memory was 83.2 MB in the beginning and 81.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:11:24,681 INFO L168 Benchmark]: RCFGBuilder took 357.78 ms. Allocated memory is still 115.3 MB. Free memory was 81.9 MB in the beginning and 90.7 MB in the end (delta: -8.9 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2020-12-09 04:11:24,681 INFO L168 Benchmark]: TraceAbstraction took 3473.90 ms. Allocated memory was 115.3 MB in the beginning and 182.5 MB in the end (delta: 67.1 MB). Free memory was 90.2 MB in the beginning and 71.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 86.3 MB. Max. memory is 16.1 GB. [2020-12-09 04:11:24,681 INFO L168 Benchmark]: Witness Printer took 31.07 ms. Allocated memory is still 182.5 MB. Free memory was 71.6 MB in the beginning and 69.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:11:24,684 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 73.4 MB. Free memory was 45.8 MB in the beginning and 45.7 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 160.08 ms. Allocated memory is still 115.3 MB. Free memory was 94.9 MB in the beginning and 84.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.50 ms. Allocated memory is still 115.3 MB. Free memory was 84.8 MB in the beginning and 83.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.51 ms. Allocated memory is still 115.3 MB. Free memory was 83.2 MB in the beginning and 81.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 357.78 ms. Allocated memory is still 115.3 MB. Free memory was 81.9 MB in the beginning and 90.7 MB in the end (delta: -8.9 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3473.90 ms. Allocated memory was 115.3 MB in the beginning and 182.5 MB in the end (delta: 67.1 MB). Free memory was 90.2 MB in the beginning and 71.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 86.3 MB. Max. memory is 16.1 GB. * Witness Printer took 31.07 ms. Allocated memory is still 182.5 MB. Free memory was 71.6 MB in the beginning and 69.5 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: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int SIZE; [L14] const int MAX = 100000; [L18] SIZE = __VERIFIER_nondet_int() [L19] COND TRUE SIZE > 1 && SIZE < MAX [L21] int i; [L22] int *a = malloc(sizeof(int)*SIZE); [L24] i = 0 VAL [MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [MAX=100000, SIZE=2] [L24] COND FALSE !(i < SIZE) VAL [MAX=100000, SIZE=2] [L29] COND FALSE !(SIZE % 2 != 0) [L6] COND FALSE !(!cond) [L32] i = 1 VAL [MAX=100000, SIZE=2] [L32] COND TRUE i <= SIZE/2 [L34] EXPR a[2*i-2] [L34] COND FALSE !(a[2*i-2] > i) [L38] EXPR a[2*i-1] [L38] COND FALSE !(a[2*i-1] > i) [L32] i++ VAL [MAX=100000, SIZE=2] [L32] COND FALSE !(i <= SIZE/2) [L44] i = 0 VAL [MAX=100000, SIZE=2] [L44] COND TRUE i < SIZE [L46] a[i] [L8] COND TRUE !(cond) VAL [MAX=100000, SIZE=2] [L8] reach_error() VAL [MAX=100000, SIZE=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 8 SDslu, 20 SDs, 0 SdLazy, 67 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 1036 SizeOfPredicates, 6 NumberOfNonLiveVariables, 165 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 3/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 553, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 8, TOOLS_POST_TIME[ms]: 358, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 8, TOOLS_QUANTIFIERELIM_TIME[ms]: 355, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 125, FLUID_QUERY_TIME[ms]: 2, FLUID_QUERIES: 21, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 144, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 9, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 6, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 335, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 335, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 5, DAG_COMPRESSION_PROCESSED_NODES: 60, DAG_COMPRESSION_RETAINED_NODES: 24, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...