./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/float_int_inv_square.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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ................................................................................................................................................................................................................................................. 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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ............................................................................................................................................................................................................................................................................................ 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 02:29:33,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:33,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:33,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:33,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:33,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:33,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:33,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:33,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:33,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:33,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:33,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:33,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:33,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:33,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:33,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:33,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:33,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:33,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:33,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:33,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:33,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:33,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:33,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:33,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:33,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:33,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:33,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:33,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:33,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:33,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:33,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:33,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:33,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:33,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:33,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:33,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:33,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:33,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:33,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:33,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:33,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:29:33,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:33,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:33,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:33,949 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:33,950 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:33,950 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:33,950 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:29:33,950 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:33,951 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:33,951 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:29:33,958 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:29:33,958 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:33,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:29:33,959 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:29:33,959 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:29:33,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:33,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:29:33,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:29:33,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:29:33,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:33,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:33,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:33,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:33,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:29:33,962 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:29:33,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:33,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:33,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:33,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:33,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:33,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:33,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:33,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:33,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:33,966 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:29:33,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:29:33,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:33,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:33,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:33,967 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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2021-10-11 02:29:34,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:34,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:34,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:34,286 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:34,289 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:34,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-10-11 02:29:34,350 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/data/5f6f93686/f4ac178eda8c476d83e76ce3854b619a/FLAG86c1d05c0 [2021-10-11 02:29:34,816 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:34,817 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-10-11 02:29:34,828 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/data/5f6f93686/f4ac178eda8c476d83e76ce3854b619a/FLAG86c1d05c0 [2021-10-11 02:29:35,194 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/data/5f6f93686/f4ac178eda8c476d83e76ce3854b619a [2021-10-11 02:29:35,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:35,199 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:35,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:35,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:35,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:35,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@699f47a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35, skipping insertion in model container [2021-10-11 02:29:35,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:35,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:35,410 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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-10-11 02:29:35,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:35,430 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:35,442 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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-10-11 02:29:35,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:35,460 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:35,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35 WrapperNode [2021-10-11 02:29:35,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:35,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:35,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:35,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:35,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:35,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:35,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:35,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:35,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (1/1) ... [2021-10-11 02:29:35,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:35,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:35,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:35,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:35,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:29:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:35,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:35,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:35,864 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:29:35,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:35 BoogieIcfgContainer [2021-10-11 02:29:35,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:35,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:35,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:35,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:35,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:35" (1/3) ... [2021-10-11 02:29:35,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555876aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:35, skipping insertion in model container [2021-10-11 02:29:35,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:35" (2/3) ... [2021-10-11 02:29:35,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555876aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:35, skipping insertion in model container [2021-10-11 02:29:35,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:35" (3/3) ... [2021-10-11 02:29:35,884 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2021-10-11 02:29:35,901 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:35,916 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:29:35,928 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:29:35,967 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:35,967 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:35,967 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:35,967 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:35,968 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:35,968 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:35,968 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:35,968 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:35,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2021-10-11 02:29:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:29:36,002 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:36,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:29:36,003 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:36,023 INFO L82 PathProgramCache]: Analyzing trace with hash 58046, now seen corresponding path program 1 times [2021-10-11 02:29:36,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:36,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838755899] [2021-10-11 02:29:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:36,185 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:36,213 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:36,233 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:29:36,234 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:29:36,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:29:36,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:36 BoogieIcfgContainer [2021-10-11 02:29:36,252 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:36,253 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:36,253 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:36,254 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:36,254 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:35" (3/4) ... [2021-10-11 02:29:36,258 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:29:36,258 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:36,261 INFO L168 Benchmark]: Toolchain (without parser) took 1060.82 ms. Allocated memory is still 125.8 MB. Free memory was 98.0 MB in the beginning and 69.8 MB in the end (delta: 28.2 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:36,262 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory was 79.6 MB in the beginning and 79.5 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:36,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.85 ms. Allocated memory is still 125.8 MB. Free memory was 97.8 MB in the beginning and 100.7 MB in the end (delta: -2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:36,264 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.78 ms. Allocated memory is still 125.8 MB. Free memory was 100.7 MB in the beginning and 99.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:36,265 INFO L168 Benchmark]: Boogie Preprocessor took 22.39 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 98.3 MB in the end (delta: 821.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:36,266 INFO L168 Benchmark]: RCFGBuilder took 353.14 ms. Allocated memory is still 125.8 MB. Free memory was 98.1 MB in the beginning and 83.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:36,267 INFO L168 Benchmark]: TraceAbstraction took 375.64 ms. Allocated memory is still 125.8 MB. Free memory was 82.9 MB in the beginning and 70.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:36,268 INFO L168 Benchmark]: Witness Printer took 5.20 ms. Allocated memory is still 125.8 MB. Free memory was 70.0 MB in the beginning and 69.8 MB in the end (delta: 269.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:36,272 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory was 79.6 MB in the beginning and 79.5 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.85 ms. Allocated memory is still 125.8 MB. Free memory was 97.8 MB in the beginning and 100.7 MB in the end (delta: -2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.78 ms. Allocated memory is still 125.8 MB. Free memory was 100.7 MB in the beginning and 99.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.39 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 98.3 MB in the end (delta: 821.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 353.14 ms. Allocated memory is still 125.8 MB. Free memory was 98.1 MB in the beginning and 83.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 375.64 ms. Allocated memory is still 125.8 MB. Free memory was 82.9 MB in the beginning and 70.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 5.20 ms. Allocated memory is still 125.8 MB. Free memory was 70.0 MB in the beginning and 69.8 MB in the end (delta: 269.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, 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 02:29:38,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:38,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:38,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:38,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:38,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:39,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:39,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:39,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:39,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:39,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:39,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:39,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:39,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:39,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:39,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:39,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:39,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:39,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:39,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:39,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:39,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:39,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:39,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:39,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:39,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:39,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:39,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:39,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:39,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:39,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:39,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:39,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:39,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:39,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:39,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:39,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:39,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:39,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:39,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:39,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:39,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:29:39,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:39,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:39,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:39,126 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:39,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:39,127 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:39,127 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:39,127 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:39,128 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:39,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:39,131 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:29:39,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:29:39,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:39,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:39,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:39,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:39,132 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:29:39,132 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:29:39,133 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:29:39,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:29:39,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:39,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:39,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:39,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:39,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:29:39,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:39,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:39,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:39,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:39,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:39,136 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:29:39,136 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:29:39,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:39,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:39,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:39,137 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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2021-10-11 02:29:39,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:39,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:39,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:39,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:39,614 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:39,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-10-11 02:29:39,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/data/8be0bdb07/c5fdd422ee464fc79cbf85e177132dcc/FLAGbaa984f55 [2021-10-11 02:29:40,283 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:40,284 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-10-11 02:29:40,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/data/8be0bdb07/c5fdd422ee464fc79cbf85e177132dcc/FLAGbaa984f55 [2021-10-11 02:29:40,651 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/data/8be0bdb07/c5fdd422ee464fc79cbf85e177132dcc [2021-10-11 02:29:40,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:40,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:40,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:40,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:40,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:40,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66dd3c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40, skipping insertion in model container [2021-10-11 02:29:40,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:40,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:40,872 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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-10-11 02:29:40,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:40,899 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:40,935 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_824d6cd3-9b00-4004-9c7b-84358cb2dbee/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-10-11 02:29:40,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:40,955 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:40,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40 WrapperNode [2021-10-11 02:29:40,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:40,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:40,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:40,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:40,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:41,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:41,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:41,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:41,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:41,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:41,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:41,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:41,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:41,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:41,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:41,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:41,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:41,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:41,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:41,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:41,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:41,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:41,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:29:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:43,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:43,727 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:29:43,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:43 BoogieIcfgContainer [2021-10-11 02:29:43,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:43,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:43,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:43,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:43,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:40" (1/3) ... [2021-10-11 02:29:43,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788391c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:43, skipping insertion in model container [2021-10-11 02:29:43,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (2/3) ... [2021-10-11 02:29:43,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788391c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:43, skipping insertion in model container [2021-10-11 02:29:43,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:43" (3/3) ... [2021-10-11 02:29:43,738 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2021-10-11 02:29:43,753 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:43,756 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:29:43,767 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:29:43,791 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:43,792 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:43,792 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:43,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:43,792 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:43,793 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:43,793 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:43,793 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:29:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:29:43,810 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:43,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:29:43,812 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:43,818 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2021-10-11 02:29:43,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:29:43,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858481053] [2021-10-11 02:29:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/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 02:29:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:29:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:44,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:29:44,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858481053] [2021-10-11 02:29:44,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:44,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:44,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496007001] [2021-10-11 02:29:44,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:29:44,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:29:44,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:29:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:29:44,038 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2021-10-11 02:29:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:44,053 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-11 02:29:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:29:44,055 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 02:29:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:44,064 INFO L225 Difference]: With dead ends: 19 [2021-10-11 02:29:44,064 INFO L226 Difference]: Without dead ends: 7 [2021-10-11 02:29:44,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:29:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-11 02:29:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-11 02:29:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 02:29:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-11 02:29:44,109 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-11 02:29:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:44,109 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-11 02:29:44,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:29:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-11 02:29:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:29:44,110 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:44,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:29:44,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:29:44,312 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:44,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2021-10-11 02:29:44,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:29:44,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273252195] [2021-10-11 02:29:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/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 02:29:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:44,458 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:44,566 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:44,597 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:29:44,597 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:29:44,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:29:44,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:44 BoogieIcfgContainer [2021-10-11 02:29:44,817 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:44,818 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:44,818 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:44,818 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:44,819 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:43" (3/4) ... [2021-10-11 02:29:44,820 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:29:44,855 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_824d6cd3-9b00-4004-9c7b-84358cb2dbee/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:29:44,855 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:44,863 INFO L168 Benchmark]: Toolchain (without parser) took 4201.14 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.1 MB in the beginning and 33.2 MB in the end (delta: -4.1 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:44,864 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 52.4 MB. Free memory was 33.8 MB in the beginning and 33.8 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:44,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.54 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.9 MB in the beginning and 45.8 MB in the end (delta: -16.9 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:44,865 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.00 ms. Allocated memory is still 62.9 MB. Free memory was 45.8 MB in the beginning and 44.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:44,866 INFO L168 Benchmark]: Boogie Preprocessor took 57.03 ms. Allocated memory is still 62.9 MB. Free memory was 44.3 MB in the beginning and 43.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:44,867 INFO L168 Benchmark]: RCFGBuilder took 2641.39 ms. Allocated memory is still 62.9 MB. Free memory was 43.2 MB in the beginning and 45.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:44,867 INFO L168 Benchmark]: TraceAbstraction took 1085.77 ms. Allocated memory is still 62.9 MB. Free memory was 44.8 MB in the beginning and 35.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:44,868 INFO L168 Benchmark]: Witness Printer took 37.77 ms. Allocated memory is still 62.9 MB. Free memory was 35.0 MB in the beginning and 33.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:44,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 52.4 MB. Free memory was 33.8 MB in the beginning and 33.8 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 321.54 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.9 MB in the beginning and 45.8 MB in the end (delta: -16.9 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.00 ms. Allocated memory is still 62.9 MB. Free memory was 45.8 MB in the beginning and 44.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.03 ms. Allocated memory is still 62.9 MB. Free memory was 44.3 MB in the beginning and 43.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2641.39 ms. Allocated memory is still 62.9 MB. Free memory was 43.2 MB in the beginning and 45.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1085.77 ms. Allocated memory is still 62.9 MB. Free memory was 44.8 MB in the beginning and 35.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Witness Printer took 37.77 ms. Allocated memory is still 62.9 MB. Free memory was 35.0 MB in the beginning and 33.2 MB in the end (delta: 1.8 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: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 31 ConjunctsInSsa, 1 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 proved your program to be incorrect! Received shutdown request...