./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/fo_test.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/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_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/fo_test.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/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_94acdd89-585b-4b2f-80b0-2d31fe356d7b/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 e88937087b9f706d9095d98c766f1175cee3adc1 ....................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/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_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/fo_test.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/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 e88937087b9f706d9095d98c766f1175cee3adc1 ..................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:26:12,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:12,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:12,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:12,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:12,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:12,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:12,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:12,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:12,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:12,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:12,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:12,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:12,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:12,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:12,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:12,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:12,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:12,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:12,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:12,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:12,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:12,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:12,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:12,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:12,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:12,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:12,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:12,872 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:12,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:12,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:12,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:12,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:12,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:12,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:12,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:12,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:12,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:12,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:12,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:12,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:12,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:26:12,925 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:12,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:12,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:12,927 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:12,927 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:12,927 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:12,928 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:26:12,928 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:12,928 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:12,928 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:26:12,929 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:26:12,929 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:12,929 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:26:12,929 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:26:12,930 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:26:12,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:12,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:12,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:26:12,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:12,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:12,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:12,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:12,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:12,932 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:12,933 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:12,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:12,933 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:12,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:12,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:12,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:12,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:12,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:12,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:12,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:12,935 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:26:12,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:26:12,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:12,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:12,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:12,936 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_94acdd89-585b-4b2f-80b0-2d31fe356d7b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e88937087b9f706d9095d98c766f1175cee3adc1 [2021-10-11 02:26:13,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:13,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:13,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:13,205 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:13,205 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:13,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-regression/fo_test.i [2021-10-11 02:26:13,281 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/data/3b0546666/9817a3e864e947b7b5c1e09598deaefb/FLAG2c40d0b15 [2021-10-11 02:26:13,883 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:13,883 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/sv-benchmarks/c/ldv-regression/fo_test.i [2021-10-11 02:26:13,903 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/data/3b0546666/9817a3e864e947b7b5c1e09598deaefb/FLAG2c40d0b15 [2021-10-11 02:26:14,097 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/data/3b0546666/9817a3e864e947b7b5c1e09598deaefb [2021-10-11 02:26:14,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:14,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:14,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:14,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:14,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:14,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce7c1ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14, skipping insertion in model container [2021-10-11 02:26:14,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:14,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:14,648 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_94acdd89-585b-4b2f-80b0-2d31fe356d7b/sv-benchmarks/c/ldv-regression/fo_test.i[40440,40453] [2021-10-11 02:26:14,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:14,679 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:14,717 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_94acdd89-585b-4b2f-80b0-2d31fe356d7b/sv-benchmarks/c/ldv-regression/fo_test.i[40440,40453] [2021-10-11 02:26:14,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:14,870 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:14,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14 WrapperNode [2021-10-11 02:26:14,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:14,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:14,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:14,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:14,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:14,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:14,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:14,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:14,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (1/1) ... [2021-10-11 02:26:14,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:14,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:14,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:14,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:14,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/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 02:26:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:26:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-10-11 02:26:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:26:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:15,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:15,705 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:15,706 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-11 02:26:15,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:15 BoogieIcfgContainer [2021-10-11 02:26:15,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:15,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:15,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:15,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:15,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:14" (1/3) ... [2021-10-11 02:26:15,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c003d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:15, skipping insertion in model container [2021-10-11 02:26:15,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:14" (2/3) ... [2021-10-11 02:26:15,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c003d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:15, skipping insertion in model container [2021-10-11 02:26:15,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:15" (3/3) ... [2021-10-11 02:26:15,722 INFO L111 eAbstractionObserver]: Analyzing ICFG fo_test.i [2021-10-11 02:26:15,737 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:15,746 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:15,759 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:15,803 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:15,805 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:15,805 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:15,805 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:15,805 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:15,806 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:15,806 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:15,806 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2021-10-11 02:26:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:26:15,842 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:15,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:26:15,843 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash 66887, now seen corresponding path program 1 times [2021-10-11 02:26:15,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:15,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797291484] [2021-10-11 02:26:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:16,159 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:16,205 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:16,232 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:26:16,233 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:26:16,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:16,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:16 BoogieIcfgContainer [2021-10-11 02:26:16,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:16,261 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:16,261 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:16,262 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:16,262 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:15" (3/4) ... [2021-10-11 02:26:16,266 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:26:16,266 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:16,269 INFO L168 Benchmark]: Toolchain (without parser) took 2166.34 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 68.1 MB in the beginning and 81.1 MB in the end (delta: -13.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,269 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 102.8 MB. Free memory is still 56.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:16,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 766.28 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 67.9 MB in the beginning and 95.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,272 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.37 ms. Allocated memory is still 123.7 MB. Free memory was 95.5 MB in the beginning and 92.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,273 INFO L168 Benchmark]: Boogie Preprocessor took 41.43 ms. Allocated memory is still 123.7 MB. Free memory was 92.6 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,274 INFO L168 Benchmark]: RCFGBuilder took 739.85 ms. Allocated memory is still 123.7 MB. Free memory was 90.5 MB in the beginning and 50.2 MB in the end (delta: 40.3 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:16,275 INFO L168 Benchmark]: TraceAbstraction took 548.06 ms. Allocated memory is still 123.7 MB. Free memory was 49.4 MB in the beginning and 81.1 MB in the end (delta: -31.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:16,275 INFO L168 Benchmark]: Witness Printer took 5.11 ms. Allocated memory is still 123.7 MB. Free memory is still 81.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:16,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 102.8 MB. Free memory is still 56.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 766.28 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 67.9 MB in the beginning and 95.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.37 ms. Allocated memory is still 123.7 MB. Free memory was 95.5 MB in the beginning and 92.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.43 ms. Allocated memory is still 123.7 MB. Free memory was 92.6 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 739.85 ms. Allocated memory is still 123.7 MB. Free memory was 90.5 MB in the beginning and 50.2 MB in the end (delta: 40.3 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 548.06 ms. Allocated memory is still 123.7 MB. Free memory was 49.4 MB in the beginning and 81.1 MB in the end (delta: -31.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.11 ms. Allocated memory is still 123.7 MB. Free memory is still 81.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 980]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of large string literal at line 992. Possible FailurePath: [L987] int globalState = 0; [L985] return __VERIFIER_nondet_int(); [L1002] int fd = open(file,flags); [L1003] COND FALSE !(fd>0) [L1004] return fd; [L992] int file = l_open("unknown",00); [L993] void* cbuf = (void*) malloc(sizeof(char)*100); [L998] (globalState == 1) ? (0) : __blast_assert () VAL [globalState=0] [L980] reach_error() VAL [globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:26:18,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:18,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:18,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:18,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:18,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:18,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:18,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:18,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:18,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:18,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:18,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:18,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:18,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:18,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:18,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:18,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:18,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:18,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:18,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:18,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:18,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:18,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:18,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:18,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:18,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:18,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:18,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:18,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:18,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:18,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:18,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:18,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:18,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:18,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:18,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:18,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:18,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:18,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:18,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:18,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:18,935 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:26:18,976 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:18,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:18,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:18,978 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:18,978 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:18,978 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:18,978 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:18,979 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:18,979 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:18,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:18,980 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:18,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:18,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:18,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:18,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:18,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:18,982 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:18,982 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:26:18,982 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:26:18,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:18,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:18,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:18,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:18,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:18,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:26:18,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:18,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:18,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:18,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:18,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:18,985 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:26:18,986 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:26:18,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:18,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:18,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:18,986 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_94acdd89-585b-4b2f-80b0-2d31fe356d7b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e88937087b9f706d9095d98c766f1175cee3adc1 [2021-10-11 02:26:19,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:19,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:19,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:19,430 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:19,431 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:19,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-regression/fo_test.i [2021-10-11 02:26:19,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/data/e950dcf06/14419dad2dfa4a108f15627b90281f0e/FLAG6ee0aaa18 [2021-10-11 02:26:20,230 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:20,231 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/sv-benchmarks/c/ldv-regression/fo_test.i [2021-10-11 02:26:20,255 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/data/e950dcf06/14419dad2dfa4a108f15627b90281f0e/FLAG6ee0aaa18 [2021-10-11 02:26:20,433 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/data/e950dcf06/14419dad2dfa4a108f15627b90281f0e [2021-10-11 02:26:20,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:20,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:20,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:20,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:20,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:20,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:20" (1/1) ... [2021-10-11 02:26:20,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e72327c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:20, skipping insertion in model container [2021-10-11 02:26:20,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:20" (1/1) ... [2021-10-11 02:26:20,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:20,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:21,107 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_94acdd89-585b-4b2f-80b0-2d31fe356d7b/sv-benchmarks/c/ldv-regression/fo_test.i[40440,40453] [2021-10-11 02:26:21,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:21,153 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:21,234 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_94acdd89-585b-4b2f-80b0-2d31fe356d7b/sv-benchmarks/c/ldv-regression/fo_test.i[40440,40453] [2021-10-11 02:26:21,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:21,428 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:21,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21 WrapperNode [2021-10-11 02:26:21,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:21,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:21,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:21,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:21,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:21,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:21,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:21,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:21,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... [2021-10-11 02:26:21,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:21,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:21,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:21,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:21,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/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 02:26:21,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:21,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:26:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:26:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-10-11 02:26:21,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:21,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:22,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:22,629 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-11 02:26:22,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:22 BoogieIcfgContainer [2021-10-11 02:26:22,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:22,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:22,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:22,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:22,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:20" (1/3) ... [2021-10-11 02:26:22,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a650e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:22, skipping insertion in model container [2021-10-11 02:26:22,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:21" (2/3) ... [2021-10-11 02:26:22,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a650e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:22, skipping insertion in model container [2021-10-11 02:26:22,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:22" (3/3) ... [2021-10-11 02:26:22,647 INFO L111 eAbstractionObserver]: Analyzing ICFG fo_test.i [2021-10-11 02:26:22,663 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:22,666 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:22,680 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:22,720 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:22,720 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:22,720 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:22,720 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:22,721 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:22,721 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:22,721 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:22,721 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:22,735 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-10-11 02:26:22,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:26:22,741 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:22,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:22,742 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:22,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:22,749 INFO L82 PathProgramCache]: Analyzing trace with hash 88874922, now seen corresponding path program 1 times [2021-10-11 02:26:22,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:26:22,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678436410] [2021-10-11 02:26:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:26:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:22,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:26:22,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:23,011 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 02:26:23,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:26:23,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678436410] [2021-10-11 02:26:23,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:23,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:23,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012641216] [2021-10-11 02:26:23,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:23,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:26:23,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:23,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:23,035 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2021-10-11 02:26:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:23,078 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-10-11 02:26:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:23,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-10-11 02:26:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:23,090 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:26:23,090 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:26:23,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 02:26:23,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:26:23,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:26:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:26:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8 transitions. [2021-10-11 02:26:23,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 8 transitions. Word has length 8 [2021-10-11 02:26:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:23,133 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 8 transitions. [2021-10-11 02:26:23,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 8 transitions. [2021-10-11 02:26:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:26:23,135 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:23,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:23,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:26:23,351 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:23,352 INFO L82 PathProgramCache]: Analyzing trace with hash 90721964, now seen corresponding path program 1 times [2021-10-11 02:26:23,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:26:23,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205030750] [2021-10-11 02:26:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94acdd89-585b-4b2f-80b0-2d31fe356d7b/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:26:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:23,594 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:23,672 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:23,749 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:26:23,749 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:26:23,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:26:23,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:23 BoogieIcfgContainer [2021-10-11 02:26:23,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:23,991 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:23,992 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:23,992 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:23,993 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:22" (3/4) ... [2021-10-11 02:26:23,996 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:26:23,996 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:23,998 INFO L168 Benchmark]: Toolchain (without parser) took 3560.34 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 31.5 MB in the beginning and 27.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 31.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:23,999 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 54.5 MB. Free memory was 35.6 MB in the beginning and 35.5 MB in the end (delta: 44.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:24,000 INFO L168 Benchmark]: CACSL2BoogieTranslator took 992.15 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.3 MB in the beginning and 46.9 MB in the end (delta: -15.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:24,001 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.85 ms. Allocated memory is still 67.1 MB. Free memory was 46.6 MB in the beginning and 44.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:24,002 INFO L168 Benchmark]: Boogie Preprocessor took 95.03 ms. Allocated memory is still 67.1 MB. Free memory was 44.2 MB in the beginning and 41.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:24,003 INFO L168 Benchmark]: RCFGBuilder took 990.24 ms. Allocated memory is still 67.1 MB. Free memory was 41.6 MB in the beginning and 27.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:24,004 INFO L168 Benchmark]: TraceAbstraction took 1351.22 ms. Allocated memory is still 81.8 MB. Free memory was 60.3 MB in the beginning and 27.8 MB in the end (delta: 32.5 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:24,004 INFO L168 Benchmark]: Witness Printer took 5.05 ms. Allocated memory is still 81.8 MB. Free memory is still 27.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:24,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 54.5 MB. Free memory was 35.6 MB in the beginning and 35.5 MB in the end (delta: 44.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 992.15 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.3 MB in the beginning and 46.9 MB in the end (delta: -15.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 110.85 ms. Allocated memory is still 67.1 MB. Free memory was 46.6 MB in the beginning and 44.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 95.03 ms. Allocated memory is still 67.1 MB. Free memory was 44.2 MB in the beginning and 41.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 990.24 ms. Allocated memory is still 67.1 MB. Free memory was 41.6 MB in the beginning and 27.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1351.22 ms. Allocated memory is still 81.8 MB. Free memory was 60.3 MB in the beginning and 27.8 MB in the end (delta: 32.5 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.05 ms. Allocated memory is still 81.8 MB. Free memory is still 27.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 980]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of large string literal at line 992. Possible FailurePath: [L987] int globalState = 0; VAL [globalState=0] [L985] return __VERIFIER_nondet_int(); [L1002] int fd = open(file,flags); [L1003] COND FALSE !(fd>0) VAL [globalState=0] [L1004] return fd; VAL [globalState=0] [L992] int file = l_open("unknown",00); [L993] void* cbuf = (void*) malloc(sizeof(char)*100); [L998] (globalState == 1) ? (0) : __blast_assert () VAL [globalState=0] [L980] reach_error() VAL [globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 5 SDslu, 6 SDs, 0 SdLazy, 3 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 133 SizeOfPredicates, 0 NumberOfNonLiveVariables, 68 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...