./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_square-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 052b65435ce93a43ae641d125fc7546191d1b08e ................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 052b65435ce93a43ae641d125fc7546191d1b08e ...................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 19:51:15,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:51:15,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:51:15,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:51:15,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:51:15,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:51:15,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:51:15,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:51:15,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:51:15,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:51:15,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:51:15,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:51:15,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:51:15,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:51:15,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:51:15,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:51:15,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:51:15,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:51:15,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:51:15,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:51:15,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:51:15,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:51:15,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:51:15,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:51:15,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:51:15,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:51:15,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:51:15,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:51:15,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:51:15,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:51:15,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:51:15,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:51:15,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:51:15,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:51:15,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:51:15,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:51:15,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:51:15,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:51:15,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:51:15,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:51:15,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:51:15,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 19:51:15,973 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:51:15,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:51:15,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:51:15,974 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:51:15,974 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:51:15,974 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:51:15,974 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:51:15,974 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:51:15,975 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:51:15,975 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:51:15,975 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:51:15,975 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:51:15,975 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:51:15,975 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:51:15,976 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:51:15,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:51:15,976 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:51:15,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:51:15,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:51:15,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:51:15,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:51:15,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:51:15,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:51:15,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:51:15,977 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:51:15,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:51:15,977 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:51:15,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:51:15,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:51:15,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:51:15,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:51:15,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:51:15,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:51:15,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:51:15,978 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:51:15,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:51:15,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:51:15,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:51:15,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:51:15,979 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2020-12-09 19:51:16,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:51:16,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:51:16,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:51:16,184 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:51:16,185 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:51:16,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/../../sv-benchmarks/c/float-benchs/inv_square-2.c [2020-12-09 19:51:16,233 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/data/35ddb0604/2737989e7ad34329bef0c1d664202107/FLAG18ff6ba5b [2020-12-09 19:51:16,578 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:51:16,579 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/sv-benchmarks/c/float-benchs/inv_square-2.c [2020-12-09 19:51:16,583 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/data/35ddb0604/2737989e7ad34329bef0c1d664202107/FLAG18ff6ba5b [2020-12-09 19:51:16,592 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/data/35ddb0604/2737989e7ad34329bef0c1d664202107 [2020-12-09 19:51:16,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:51:16,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:51:16,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:51:16,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:51:16,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:51:16,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60235d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16, skipping insertion in model container [2020-12-09 19:51:16,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:51:16,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:51:16,736 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2020-12-09 19:51:16,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:51:16,755 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:51:16,763 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2020-12-09 19:51:16,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:51:16,778 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:51:16,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16 WrapperNode [2020-12-09 19:51:16,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:51:16,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:51:16,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:51:16,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:51:16,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:51:16,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:51:16,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:51:16,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:51:16,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (1/1) ... [2020-12-09 19:51:16,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:51:16,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:51:16,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:51:16,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:51:16,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:51:16,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 19:51:16,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:51:16,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:51:16,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:51:17,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:51:17,034 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 19:51:17,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:51:17 BoogieIcfgContainer [2020-12-09 19:51:17,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:51:17,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:51:17,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:51:17,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:51:17,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:51:16" (1/3) ... [2020-12-09 19:51:17,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce4f7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:51:17, skipping insertion in model container [2020-12-09 19:51:17,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:16" (2/3) ... [2020-12-09 19:51:17,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce4f7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:51:17, skipping insertion in model container [2020-12-09 19:51:17,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:51:17" (3/3) ... [2020-12-09 19:51:17,042 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2020-12-09 19:51:17,052 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:51:17,054 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 19:51:17,062 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 19:51:17,078 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:51:17,078 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:51:17,078 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:51:17,079 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:51:17,079 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:51:17,079 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:51:17,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:51:17,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:51:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2020-12-09 19:51:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 19:51:17,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:51:17,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 19:51:17,091 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:51:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:51:17,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1947436, now seen corresponding path program 1 times [2020-12-09 19:51:17,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:51:17,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726349915] [2020-12-09 19:51:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:51:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:51:17,183 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:51:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:51:17,200 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:51:17,215 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 19:51:17,215 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 19:51:17,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:51:17,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:51:17 BoogieIcfgContainer [2020-12-09 19:51:17,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:51:17,230 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:51:17,231 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:51:17,231 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:51:17,231 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:51:17" (3/4) ... [2020-12-09 19:51:17,234 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 19:51:17,234 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:51:17,235 INFO L168 Benchmark]: Toolchain (without parser) took 639.18 ms. Allocated memory is still 127.9 MB. Free memory was 91.4 MB in the beginning and 72.5 MB in the end (delta: 18.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:17,236 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory was 107.5 MB in the beginning and 107.4 MB in the end (delta: 106.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:51:17,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.15 ms. Allocated memory is still 127.9 MB. Free memory was 91.2 MB in the beginning and 102.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:17,237 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.83 ms. Allocated memory is still 127.9 MB. Free memory was 102.8 MB in the beginning and 101.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:17,238 INFO L168 Benchmark]: Boogie Preprocessor took 13.61 ms. Allocated memory is still 127.9 MB. Free memory was 101.5 MB in the beginning and 100.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:51:17,239 INFO L168 Benchmark]: RCFGBuilder took 219.88 ms. Allocated memory is still 127.9 MB. Free memory was 100.3 MB in the beginning and 85.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:17,239 INFO L168 Benchmark]: TraceAbstraction took 193.08 ms. Allocated memory is still 127.9 MB. Free memory was 85.3 MB in the beginning and 72.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:17,240 INFO L168 Benchmark]: Witness Printer took 3.30 ms. Allocated memory is still 127.9 MB. Free memory was 72.7 MB in the beginning and 72.5 MB in the end (delta: 173.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:51:17,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory was 107.5 MB in the beginning and 107.4 MB in the end (delta: 106.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 182.15 ms. Allocated memory is still 127.9 MB. Free memory was 91.2 MB in the beginning and 102.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.83 ms. Allocated memory is still 127.9 MB. Free memory was 102.8 MB in the beginning and 101.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.61 ms. Allocated memory is still 127.9 MB. Free memory was 101.5 MB in the beginning and 100.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 219.88 ms. Allocated memory is still 127.9 MB. Free memory was 100.3 MB in the beginning and 85.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 193.08 ms. Allocated memory is still 127.9 MB. Free memory was 85.3 MB in the beginning and 72.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 3.30 ms. Allocated memory is still 127.9 MB. Free memory was 72.7 MB in the beginning and 72.5 MB in the end (delta: 173.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: 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 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x <= -1e-20f || x >= 1e-20f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, 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=8occurred 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, 4 NumberOfCodeBlocks, 4 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 [2020-12-09 19:51:18,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:51:18,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:51:18,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:51:18,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:51:18,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:51:18,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:51:18,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:51:18,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:51:18,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:51:18,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:51:18,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:51:18,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:51:18,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:51:18,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:51:18,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:51:18,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:51:18,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:51:18,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:51:18,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:51:18,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:51:18,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:51:18,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:51:18,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:51:18,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:51:18,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:51:18,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:51:18,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:51:18,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:51:18,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:51:18,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:51:18,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:51:18,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:51:18,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:51:18,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:51:18,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:51:18,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:51:18,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:51:18,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:51:18,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:51:18,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:51:18,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 19:51:18,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:51:18,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:51:18,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:51:18,885 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:51:18,885 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:51:18,885 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:51:18,885 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:51:18,886 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:51:18,886 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:51:18,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:51:18,886 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:51:18,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:51:18,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:51:18,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:51:18,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:51:18,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:51:18,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:51:18,887 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 19:51:18,887 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 19:51:18,888 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:51:18,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:51:18,888 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:51:18,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:51:18,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:51:18,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 19:51:18,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:51:18,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:51:18,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:51:18,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:51:18,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:51:18,889 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 19:51:18,889 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 19:51:18,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:51:18,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:51:18,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:51:18,890 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-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2020-12-09 19:51:19,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:51:19,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:51:19,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:51:19,134 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:51:19,134 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:51:19,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/../../sv-benchmarks/c/float-benchs/inv_square-2.c [2020-12-09 19:51:19,174 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/data/95862a46b/1ea5d5c85a5c4cc081d07bb7caae9ed4/FLAG1ed629614 [2020-12-09 19:51:19,555 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:51:19,555 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/sv-benchmarks/c/float-benchs/inv_square-2.c [2020-12-09 19:51:19,560 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/data/95862a46b/1ea5d5c85a5c4cc081d07bb7caae9ed4/FLAG1ed629614 [2020-12-09 19:51:19,570 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/data/95862a46b/1ea5d5c85a5c4cc081d07bb7caae9ed4 [2020-12-09 19:51:19,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:51:19,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:51:19,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:51:19,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:51:19,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:51:19,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570de896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19, skipping insertion in model container [2020-12-09 19:51:19,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:51:19,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:51:19,685 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2020-12-09 19:51:19,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:51:19,703 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:51:19,713 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2020-12-09 19:51:19,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:51:19,726 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:51:19,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19 WrapperNode [2020-12-09 19:51:19,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:51:19,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:51:19,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:51:19,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:51:19,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:51:19,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:51:19,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:51:19,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:51:19,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (1/1) ... [2020-12-09 19:51:19,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:51:19,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:51:19,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:51:19,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:51:19,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:51:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 19:51:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:51:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:51:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:51:21,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:51:21,008 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 19:51:21,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:51:21 BoogieIcfgContainer [2020-12-09 19:51:21,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:51:21,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:51:21,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:51:21,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:51:21,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:51:19" (1/3) ... [2020-12-09 19:51:21,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5718c61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:51:21, skipping insertion in model container [2020-12-09 19:51:21,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:51:19" (2/3) ... [2020-12-09 19:51:21,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5718c61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:51:21, skipping insertion in model container [2020-12-09 19:51:21,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:51:21" (3/3) ... [2020-12-09 19:51:21,017 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2020-12-09 19:51:21,029 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:51:21,031 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 19:51:21,038 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 19:51:21,055 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:51:21,055 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:51:21,055 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:51:21,055 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:51:21,056 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:51:21,056 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:51:21,056 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:51:21,056 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:51:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 19:51:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 19:51:21,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:51:21,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 19:51:21,068 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:51:21,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:51:21,072 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-12-09 19:51:21,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:51:21,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015043870] [2020-12-09 19:51:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/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 [2020-12-09 19:51:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:51:21,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 19:51:21,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:51:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:51:21,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:51:21,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015043870] [2020-12-09 19:51:21,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:51:21,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:51:21,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446286679] [2020-12-09 19:51:21,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 19:51:21,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:51:21,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 19:51:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 19:51:21,216 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-09 19:51:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:51:21,226 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 19:51:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 19:51:21,227 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 19:51:21,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:51:21,232 INFO L225 Difference]: With dead ends: 21 [2020-12-09 19:51:21,232 INFO L226 Difference]: Without dead ends: 7 [2020-12-09 19:51:21,234 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 [2020-12-09 19:51:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-09 19:51:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-09 19:51:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-09 19:51:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-12-09 19:51:21,254 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-12-09 19:51:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:51:21,254 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-12-09 19:51:21,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 19:51:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-12-09 19:51:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 19:51:21,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:51:21,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 19:51:21,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 19:51:21,455 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:51:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:51:21,456 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-12-09 19:51:21,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:51:21,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684191301] [2020-12-09 19:51:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/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 [2020-12-09 19:51:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:51:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 19:51:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:51:21,668 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 19:51:21,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 19:51:22,318 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 19:51:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:51:22,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:51:22,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684191301] [2020-12-09 19:51:22,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:51:22,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:51:22,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621804048] [2020-12-09 19:51:22,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:51:22,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:51:22,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:51:22,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:51:22,877 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 6 states. [2020-12-09 19:51:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:51:23,142 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-12-09 19:51:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:51:23,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-12-09 19:51:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:51:23,143 INFO L225 Difference]: With dead ends: 7 [2020-12-09 19:51:23,143 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 19:51:23,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 19:51:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 19:51:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 19:51:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 19:51:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 19:51:23,145 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-12-09 19:51:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:51:23,145 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 19:51:23,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:51:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 19:51:23,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 19:51:23,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 19:51:23,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 19:51:23,408 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 19:51:23,408 INFO L265 CegarLoopResult]: At program point L27(lines 15 28) the Hoare annotation is: true [2020-12-09 19:51:23,408 INFO L262 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-12-09 19:51:23,408 INFO L262 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-12-09 19:51:23,408 INFO L262 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-12-09 19:51:23,408 INFO L265 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2020-12-09 19:51:23,409 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 19:51:23,409 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 19:51:23,409 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 19:51:23,409 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-12-09 19:51:23,409 INFO L262 CegarLoopResult]: For program point L22-1(lines 22 26) no Hoare annotation was computed. [2020-12-09 19:51:23,409 INFO L262 CegarLoopResult]: For program point L10(lines 22 26) no Hoare annotation was computed. [2020-12-09 19:51:23,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:51:23 BoogieIcfgContainer [2020-12-09 19:51:23,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:51:23,415 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:51:23,415 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:51:23,415 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:51:23,416 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:51:21" (3/4) ... [2020-12-09 19:51:23,418 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 19:51:23,425 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-09 19:51:23,425 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 19:51:23,425 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 19:51:23,425 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 19:51:23,451 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_44ffe841-2219-432d-abaf-abab3fb00567/bin/utaipan/witness.graphml [2020-12-09 19:51:23,451 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:51:23,453 INFO L168 Benchmark]: Toolchain (without parser) took 3878.99 ms. Allocated memory was 56.6 MB in the beginning and 86.0 MB in the end (delta: 29.4 MB). Free memory was 36.2 MB in the beginning and 54.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:23,453 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 39.2 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:51:23,454 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.07 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 25.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:23,454 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.77 ms. Allocated memory is still 56.6 MB. Free memory was 41.4 MB in the beginning and 40.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:51:23,455 INFO L168 Benchmark]: Boogie Preprocessor took 34.56 ms. Allocated memory was 56.6 MB in the beginning and 86.0 MB in the end (delta: 29.4 MB). Free memory was 40.0 MB in the beginning and 69.7 MB in the end (delta: -29.7 MB). Peak memory consumption was 2.2 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:23,456 INFO L168 Benchmark]: RCFGBuilder took 1211.00 ms. Allocated memory is still 86.0 MB. Free memory was 69.7 MB in the beginning and 58.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:23,456 INFO L168 Benchmark]: TraceAbstraction took 2402.86 ms. Allocated memory is still 86.0 MB. Free memory was 57.7 MB in the beginning and 56.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.8 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:23,457 INFO L168 Benchmark]: Witness Printer took 36.31 ms. Allocated memory is still 86.0 MB. Free memory was 56.5 MB in the beginning and 54.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:51:23,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 39.2 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 153.07 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 25.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.77 ms. Allocated memory is still 56.6 MB. Free memory was 41.4 MB in the beginning and 40.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.56 ms. Allocated memory was 56.6 MB in the beginning and 86.0 MB in the end (delta: 29.4 MB). Free memory was 40.0 MB in the beginning and 69.7 MB in the end (delta: -29.7 MB). Peak memory consumption was 2.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1211.00 ms. Allocated memory is still 86.0 MB. Free memory was 69.7 MB in the beginning and 58.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2402.86 ms. Allocated memory is still 86.0 MB. Free memory was 57.7 MB in the beginning and 56.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.8 MB. Max. memory is 16.1 GB. * Witness Printer took 36.31 ms. Allocated memory is still 86.0 MB. Free memory was 56.5 MB in the beginning and 54.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 6 SDslu, 1 SDs, 0 SdLazy, 8 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 335 SizeOfPredicates, 6 NumberOfNonLiveVariables, 64 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 correct! Received shutdown request...