./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condnf.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_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/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_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/condnf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/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_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/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 8f200ba5f761b85a7e085e45c2d123795022765b ........................................................................................................................................................................................................................................................................................................................................................ 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 [2021-10-11 02:26:25,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:25,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:25,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:25,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:25,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:25,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:25,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:25,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:25,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:25,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:25,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:25,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:25,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:25,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:25,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:25,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:25,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:25,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:25,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:25,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:25,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:25,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:25,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:25,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:25,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:25,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:25,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:25,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:25,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:25,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:25,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:25,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:25,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:25,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:25,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:25,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:25,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:25,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:25,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:25,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:25,349 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:26:25,396 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:25,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:25,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:25,398 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:25,398 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:25,399 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:25,399 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:26:25,399 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:25,399 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:25,400 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:26:25,401 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:26:25,401 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:25,401 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:26:25,402 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:26:25,402 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:26:25,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:25,403 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:25,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:26:25,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:25,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:25,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:25,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:25,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:25,405 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:25,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:25,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:25,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:25,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:25,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:25,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:25,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:25,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:25,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:25,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:25,408 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:26:25,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:26:25,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:25,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:25,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:25,409 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_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f200ba5f761b85a7e085e45c2d123795022765b [2021-10-11 02:26:25,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:25,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:25,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:25,697 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:25,698 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:25,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/condnf.c [2021-10-11 02:26:25,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI/data/bc42de9c1/2135afc39ab74673b5a005af8a69613c/FLAG7bdfe72af [2021-10-11 02:26:26,276 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:26,277 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/sv-benchmarks/c/array-fpi/condnf.c [2021-10-11 02:26:26,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI/data/bc42de9c1/2135afc39ab74673b5a005af8a69613c/FLAG7bdfe72af [2021-10-11 02:26:26,618 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI/data/bc42de9c1/2135afc39ab74673b5a005af8a69613c [2021-10-11 02:26:26,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:26,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:26,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:26,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:26,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:26,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7143cab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26, skipping insertion in model container [2021-10-11 02:26:26,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:26,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:26,829 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_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/sv-benchmarks/c/array-fpi/condnf.c[589,602] [2021-10-11 02:26:26,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:26,854 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:26,866 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_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/sv-benchmarks/c/array-fpi/condnf.c[589,602] [2021-10-11 02:26:26,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:26,887 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:26,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26 WrapperNode [2021-10-11 02:26:26,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:26,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:26,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:26,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:26,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:26,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:26,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:26,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:26,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (1/1) ... [2021-10-11 02:26:26,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:26,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:26,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:26,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:26,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:26:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:26:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:26:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:27,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:26:27,492 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:27,492 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:26:27,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:27 BoogieIcfgContainer [2021-10-11 02:26:27,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:27,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:27,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:27,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:27,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:26" (1/3) ... [2021-10-11 02:26:27,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9087783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:27, skipping insertion in model container [2021-10-11 02:26:27,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:26" (2/3) ... [2021-10-11 02:26:27,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9087783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:27, skipping insertion in model container [2021-10-11 02:26:27,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:27" (3/3) ... [2021-10-11 02:26:27,504 INFO L111 eAbstractionObserver]: Analyzing ICFG condnf.c [2021-10-11 02:26:27,534 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:27,552 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:27,562 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:27,587 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:27,588 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:27,588 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:27,588 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:27,588 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:27,588 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:27,588 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:27,589 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:26:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:26:27,606 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:27,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:27,607 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:27,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:27,614 INFO L82 PathProgramCache]: Analyzing trace with hash -2108465683, now seen corresponding path program 1 times [2021-10-11 02:26:27,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:27,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201987628] [2021-10-11 02:26:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:27,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201987628] [2021-10-11 02:26:27,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:27,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:27,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950312528] [2021-10-11 02:26:27,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:27,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:27,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:27,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:27,894 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2021-10-11 02:26:27,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:27,960 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-10-11 02:26:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:27,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-10-11 02:26:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:27,978 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:26:27,985 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:26:27,989 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 [2021-10-11 02:26:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:26:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:26:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:26:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-11 02:26:28,028 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-11 02:26:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:28,028 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-11 02:26:28,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-11 02:26:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:26:28,030 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:28,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:28,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:28,031 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:28,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1164281636, now seen corresponding path program 1 times [2021-10-11 02:26:28,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:28,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468817296] [2021-10-11 02:26:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:28,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468817296] [2021-10-11 02:26:28,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:28,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:28,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661950731] [2021-10-11 02:26:28,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:28,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:28,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:28,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:28,149 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2021-10-11 02:26:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:28,193 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:26:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:28,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:26:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:28,195 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:26:28,195 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:26:28,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:26:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-11 02:26:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:26:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-11 02:26:28,204 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-11 02:26:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:28,205 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-11 02:26:28,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-11 02:26:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:26:28,206 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:28,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:28,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:26:28,208 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:28,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1734008127, now seen corresponding path program 1 times [2021-10-11 02:26:28,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:28,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529337010] [2021-10-11 02:26:28,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:28,312 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:28,376 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:28,412 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:26:28,412 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:26:28,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:26:28,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:28 BoogieIcfgContainer [2021-10-11 02:26:28,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:28,462 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:28,462 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:28,463 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:28,464 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:27" (3/4) ... [2021-10-11 02:26:28,466 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:26:28,514 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242fbea7-e4e6-47e8-b6c0-6e7250395cc8/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:26:28,514 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:28,516 INFO L168 Benchmark]: Toolchain (without parser) took 1890.32 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 76.1 MB in the beginning and 78.9 MB in the end (delta: -2.8 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:28,517 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory was 65.0 MB in the beginning and 65.0 MB in the end (delta: 54.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:28,517 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.25 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 76.1 MB in the beginning and 104.2 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:28,518 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.35 ms. Allocated memory is still 130.0 MB. Free memory was 104.2 MB in the beginning and 103.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:28,519 INFO L168 Benchmark]: Boogie Preprocessor took 26.67 ms. Allocated memory is still 130.0 MB. Free memory was 102.5 MB in the beginning and 101.8 MB in the end (delta: 754.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:28,519 INFO L168 Benchmark]: RCFGBuilder took 542.09 ms. Allocated memory is still 130.0 MB. Free memory was 101.3 MB in the beginning and 78.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:28,520 INFO L168 Benchmark]: TraceAbstraction took 965.57 ms. Allocated memory is still 130.0 MB. Free memory was 77.8 MB in the beginning and 81.0 MB in the end (delta: -3.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:28,521 INFO L168 Benchmark]: Witness Printer took 52.03 ms. Allocated memory is still 130.0 MB. Free memory was 81.0 MB in the beginning and 78.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:28,524 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory was 65.0 MB in the beginning and 65.0 MB in the end (delta: 54.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.25 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 76.1 MB in the beginning and 104.2 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.35 ms. Allocated memory is still 130.0 MB. Free memory was 104.2 MB in the beginning and 103.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.67 ms. Allocated memory is still 130.0 MB. Free memory was 102.5 MB in the beginning and 101.8 MB in the end (delta: 754.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 542.09 ms. Allocated memory is still 130.0 MB. Free memory was 101.3 MB in the beginning and 78.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 965.57 ms. Allocated memory is still 130.0 MB. Free memory was 77.8 MB in the beginning and 81.0 MB in the end (delta: -3.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 52.03 ms. Allocated memory is still 130.0 MB. Free memory was 81.0 MB in the beginning and 78.9 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] int *a = malloc(sizeof(int)*N); [L30] i=0 VAL [N=1] [L30] COND TRUE i N [L38] EXPR a[i] [L38] a[i] = a[i] [L35] i++ VAL [N=1] [L35] COND FALSE !(i