./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8 --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 f60c1e7f1bcabd47cf7b5def116f38f131aaa102 ................................................................................................................................................................................................................................................................ 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_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8 --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 f60c1e7f1bcabd47cf7b5def116f38f131aaa102 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:30:03,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:30:03,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:30:03,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:30:03,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:30:03,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:30:03,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:30:03,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:30:03,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:30:03,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:30:03,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:30:03,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:30:03,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:30:03,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:30:03,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:30:03,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:30:03,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:30:03,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:30:03,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:30:03,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:30:03,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:30:03,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:30:03,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:30:03,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:30:03,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:30:03,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:30:03,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:30:03,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:30:03,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:30:03,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:30:03,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:30:03,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:30:03,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:30:03,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:30:03,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:30:03,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:30:03,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:30:03,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:30:03,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:30:03,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:30:03,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:30:03,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:30:03,952 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:30:03,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:30:03,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:30:03,954 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:30:03,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:30:03,954 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:30:03,954 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:30:03,954 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:30:03,955 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:30:03,955 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:30:03,955 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:30:03,955 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:30:03,956 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:30:03,956 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:30:03,956 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:30:03,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:30:03,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:30:03,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:30:03,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:30:03,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:30:03,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:30:03,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:30:03,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:30:03,958 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:30:03,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:30:03,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:30:03,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:30:03,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:30:03,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:30:03,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:30:03,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:30:03,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:30:03,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:30:03,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:30:03,961 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:30:03,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:30:03,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:30:03,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:30:03,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:30:03,962 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_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f60c1e7f1bcabd47cf7b5def116f38f131aaa102 [2021-10-13 07:30:04,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:30:04,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:30:04,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:30:04,256 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:30:04,257 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:30:04,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2021-10-13 07:30:04,327 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/data/309870135/7512bcd648c94116a1797562ec1806ca/FLAGe67ed1c39 [2021-10-13 07:30:04,806 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:30:04,807 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2021-10-13 07:30:04,813 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/data/309870135/7512bcd648c94116a1797562ec1806ca/FLAGe67ed1c39 [2021-10-13 07:30:05,174 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/data/309870135/7512bcd648c94116a1797562ec1806ca [2021-10-13 07:30:05,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:30:05,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:30:05,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:30:05,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:30:05,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:30:05,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@462a8e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05, skipping insertion in model container [2021-10-13 07:30:05,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:30:05,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:30:05,371 WARN L228 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_d9252e49-cee9-43e8-8ba1-b4e30fe91596/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2021-10-13 07:30:05,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:30:05,404 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:30:05,415 WARN L228 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_d9252e49-cee9-43e8-8ba1-b4e30fe91596/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2021-10-13 07:30:05,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:30:05,436 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:30:05,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05 WrapperNode [2021-10-13 07:30:05,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:30:05,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:30:05,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:30:05,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:30:05,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:30:05,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:30:05,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:30:05,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:30:05,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:30:05,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:30:05,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:30:05,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:30:05,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (1/1) ... [2021-10-13 07:30:05,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:30:05,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:05,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:30:05,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:30:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:30:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:30:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:30:05,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:30:06,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:30:06,035 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:30:06,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:30:06 BoogieIcfgContainer [2021-10-13 07:30:06,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:30:06,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:30:06,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:30:06,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:30:06,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:30:05" (1/3) ... [2021-10-13 07:30:06,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dded6d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:30:06, skipping insertion in model container [2021-10-13 07:30:06,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:05" (2/3) ... [2021-10-13 07:30:06,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dded6d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:30:06, skipping insertion in model container [2021-10-13 07:30:06,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:30:06" (3/3) ... [2021-10-13 07:30:06,051 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2021-10-13 07:30:06,062 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:30:06,063 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:30:06,110 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:30:06,118 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:30:06,118 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:30:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:30:06,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:06,138 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:30:06,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:06,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:06,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2617893, now seen corresponding path program 1 times [2021-10-13 07:30:06,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:06,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166895969] [2021-10-13 07:30:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:06,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:30:06,301 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:30:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:30:06,391 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:30:06,393 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:30:06,399 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:30:06,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:30:06,408 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:30:06,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:30:06 BoogieIcfgContainer [2021-10-13 07:30:06,434 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:30:06,435 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:30:06,435 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:30:06,435 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:30:06,436 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:30:06" (3/4) ... [2021-10-13 07:30:06,439 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:30:06,439 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:30:06,441 INFO L168 Benchmark]: Toolchain (without parser) took 1261.81 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 50.0 MB in the beginning and 44.1 MB in the end (delta: 5.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:06,442 INFO L168 Benchmark]: CDTParser took 8.16 ms. Allocated memory is still 83.9 MB. Free memory was 62.7 MB in the beginning and 66.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:06,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.42 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 49.8 MB in the beginning and 76.6 MB in the end (delta: -26.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:06,443 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.14 ms. Allocated memory is still 100.7 MB. Free memory was 76.6 MB in the beginning and 74.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:30:06,444 INFO L168 Benchmark]: Boogie Preprocessor took 24.15 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 73.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:06,444 INFO L168 Benchmark]: RCFGBuilder took 529.99 ms. Allocated memory is still 100.7 MB. Free memory was 73.8 MB in the beginning and 58.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:06,445 INFO L168 Benchmark]: TraceAbstraction took 392.42 ms. Allocated memory is still 100.7 MB. Free memory was 58.2 MB in the beginning and 44.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:06,446 INFO L168 Benchmark]: Witness Printer took 3.88 ms. Allocated memory is still 100.7 MB. Free memory was 44.5 MB in the beginning and 44.1 MB in the end (delta: 336.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:30:06,449 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 8.16 ms. Allocated memory is still 83.9 MB. Free memory was 62.7 MB in the beginning and 66.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 257.42 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 49.8 MB in the beginning and 76.6 MB in the end (delta: -26.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.14 ms. Allocated memory is still 100.7 MB. Free memory was 76.6 MB in the beginning and 74.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.15 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 73.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 529.99 ms. Allocated memory is still 100.7 MB. Free memory was 73.8 MB in the beginning and 58.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 392.42 ms. Allocated memory is still 100.7 MB. Free memory was 58.2 MB in the beginning and 44.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.88 ms. Allocated memory is still 100.7 MB. Free memory was 44.5 MB in the beginning and 44.1 MB in the end (delta: 336.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticDOUBLEoperation at line 44, overapproximation of someUnaryDOUBLEoperation at line 32, overapproximation of someBinaryDOUBLEComparisonOperation at line 56. Possible FailurePath: [L22] double _EPS = 1e-6; [L49] double d, r; [L51] d = __VERIFIER_nondet_double() [L18] COND FALSE !(!cond) [L26] double xn, xnp1, residu, lsup, linf; [L27] int i, cond; [L28] COND TRUE Input <= 1.0 [L28] xn = 1.0 [L29] xnp1 = xn [L30] residu = 2.0*_EPS*(xn+xnp1) [L31] lsup = _EPS * (xn+xnp1) [L32] linf = -lsup [L33] cond = ((residu > lsup) || (residu < linf)) [L34] i = 0 VAL [_EPS=1/1000000] [L35] COND FALSE !(\read(cond)) [L44] return 1.0 / xnp1; [L54] r = SqrtR(d) [L20] COND TRUE !(cond) VAL [_EPS=1/1000000] [L20] reach_error() VAL [_EPS=1/1000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 298.0ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 9.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.8ms SsaConstructionTime, 62.4ms SatisfiabilityAnalysisTime, 0.0ms 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 [2021-10-13 07:30:06,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:30:08,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:30:08,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:30:08,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:30:08,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:30:08,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:30:08,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:30:08,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:30:08,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:30:08,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:30:08,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:30:08,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:30:08,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:30:08,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:30:08,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:30:08,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:30:08,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:30:08,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:30:08,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:30:08,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:30:08,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:30:08,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:30:08,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:30:08,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:30:08,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:30:08,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:30:08,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:30:08,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:30:08,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:30:08,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:30:08,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:30:08,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:30:08,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:30:08,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:30:08,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:30:08,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:30:08,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:30:08,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:30:08,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:30:08,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:30:08,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:30:08,870 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:30:08,914 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:30:08,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:30:08,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:30:08,915 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:30:08,915 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:30:08,916 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:30:08,916 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:30:08,916 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:30:08,916 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:30:08,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:30:08,917 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:30:08,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:30:08,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:30:08,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:30:08,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:30:08,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:30:08,918 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:30:08,919 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:30:08,919 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:30:08,919 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:30:08,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:30:08,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:30:08,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:30:08,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:30:08,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:30:08,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:30:08,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:30:08,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:30:08,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:30:08,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:30:08,925 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:30:08,925 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:30:08,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:30:08,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:30:08,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:30:08,926 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_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f60c1e7f1bcabd47cf7b5def116f38f131aaa102 [2021-10-13 07:30:09,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:30:09,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:30:09,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:30:09,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:30:09,348 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:30:09,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2021-10-13 07:30:09,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/data/b32ad2b57/ca78ac7a66df472f96b4680cce0f6347/FLAG3b1e37098 [2021-10-13 07:30:09,945 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:30:09,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2021-10-13 07:30:09,954 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/data/b32ad2b57/ca78ac7a66df472f96b4680cce0f6347/FLAG3b1e37098 [2021-10-13 07:30:10,397 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/data/b32ad2b57/ca78ac7a66df472f96b4680cce0f6347 [2021-10-13 07:30:10,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:30:10,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:30:10,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:30:10,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:30:10,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:30:10,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ede808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10, skipping insertion in model container [2021-10-13 07:30:10,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:30:10,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:30:10,633 WARN L228 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_d9252e49-cee9-43e8-8ba1-b4e30fe91596/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2021-10-13 07:30:10,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:30:10,665 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:30:10,677 WARN L228 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_d9252e49-cee9-43e8-8ba1-b4e30fe91596/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2021-10-13 07:30:10,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:30:10,714 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:30:10,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10 WrapperNode [2021-10-13 07:30:10,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:30:10,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:30:10,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:30:10,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:30:10,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:30:10,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:30:10,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:30:10,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:30:10,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:30:10,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:30:10,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:30:10,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:30:10,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (1/1) ... [2021-10-13 07:30:10,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:30:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:10,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:30:10,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:30:10,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:30:10,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:30:10,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:30:10,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:30:18,709 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:30:18,709 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:30:18,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:30:18 BoogieIcfgContainer [2021-10-13 07:30:18,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:30:18,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:30:18,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:30:18,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:30:18,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:30:10" (1/3) ... [2021-10-13 07:30:18,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784f9de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:30:18, skipping insertion in model container [2021-10-13 07:30:18,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:10" (2/3) ... [2021-10-13 07:30:18,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784f9de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:30:18, skipping insertion in model container [2021-10-13 07:30:18,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:30:18" (3/3) ... [2021-10-13 07:30:18,729 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2021-10-13 07:30:18,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:30:18,737 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:30:18,792 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:30:18,797 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:30:18,798 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:30:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:30:18,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:18,815 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:18,815 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash 334453616, now seen corresponding path program 1 times [2021-10-13 07:30:18,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:30:18,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703378753] [2021-10-13 07:30:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:18,835 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:30:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:30:18,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:30:18,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:30:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:20,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:30:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:30:20,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:30:20,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:30:20,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703378753] [2021-10-13 07:30:20,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703378753] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:20,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:20,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:30:20,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216236711] [2021-10-13 07:30:20,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:30:20,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:30:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:30:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:30:20,667 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:20,680 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-10-13 07:30:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:30:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:30:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:20,688 INFO L225 Difference]: With dead ends: 29 [2021-10-13 07:30:20,689 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 07:30:20,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:30:20,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 07:30:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-13 07:30:20,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-13 07:30:20,732 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2021-10-13 07:30:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:20,733 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-13 07:30:20,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:20,733 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-13 07:30:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:30:20,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:20,734 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:20,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:20,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:30:20,953 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:20,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:20,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1014511986, now seen corresponding path program 1 times [2021-10-13 07:30:20,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:30:20,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79949106] [2021-10-13 07:30:20,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:20,956 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:30:20,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:30:20,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:30:20,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:30:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:22,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:30:22,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:30:23,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:34,072 WARN L838 $PredicateComparison]: unable to prove that (or (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0))) (forall ((v_ULTIMATE.start_SqrtR_~linf~0_7 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0)) v_ULTIMATE.start_SqrtR_~linf~0_7))) is different from false [2021-10-13 07:30:36,143 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0))) (forall ((v_ULTIMATE.start_SqrtR_~linf~0_7 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0)) v_ULTIMATE.start_SqrtR_~linf~0_7))) is different from true [2021-10-13 07:30:42,230 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse0 (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (fp.add c_currentRoundingMode .cse1 .cse1)))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0))) (forall ((v_ULTIMATE.start_SqrtR_~linf~0_7 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (fp.add c_currentRoundingMode .cse2 .cse2))) v_ULTIMATE.start_SqrtR_~linf~0_7))) is different from true [2021-10-13 07:30:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:30:53,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:30:53,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79949106] [2021-10-13 07:30:53,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79949106] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:53,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:53,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 07:30:53,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166071483] [2021-10-13 07:30:53,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:30:53,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:30:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:30:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=20, Unknown=3, NotChecked=18, Total=56 [2021-10-13 07:30:53,694 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:58,962 WARN L860 $PredicateComparison]: unable to prove that (and (or (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0))) (forall ((v_ULTIMATE.start_SqrtR_~linf~0_7 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0)) v_ULTIMATE.start_SqrtR_~linf~0_7))) (= c_~_EPS~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (= c_currentRoundingMode roundNearestTiesToEven) (= c_ULTIMATE.start_SqrtR_~xn~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-10-13 07:31:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:31:15,834 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-13 07:31:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:31:15,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:31:15,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:31:15,836 INFO L225 Difference]: With dead ends: 19 [2021-10-13 07:31:15,836 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 07:31:15,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 10720.1ms TimeCoverageRelationStatistics Valid=17, Invalid=21, Unknown=4, NotChecked=30, Total=72 [2021-10-13 07:31:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 07:31:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-13 07:31:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:31:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-13 07:31:15,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-10-13 07:31:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:31:15,843 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-13 07:31:15,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:31:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-13 07:31:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:31:15,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:15,845 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:15,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:16,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:31:16,064 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:16,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:16,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1505447948, now seen corresponding path program 1 times [2021-10-13 07:31:16,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:31:16,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651079714] [2021-10-13 07:31:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:16,066 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:31:16,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:31:16,068 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:31:16,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:31:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:20,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:31:20,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:37,366 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xn~0)))) (= c_~_EPS~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-10-13 07:32:16,996 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse5 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse2 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5)) (.cse3 (fp.mul c_currentRoundingMode .cse4 .cse5))) (let ((.cse0 (fp.gt .cse2 .cse3)) (.cse1 (fp.lt .cse2 (fp.neg .cse3)))) (or (and (not .cse0) (not .cse1) (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv0 32))) (and (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv1 32)) (or .cse0 .cse1)))))) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= (fp.div c_currentRoundingMode .cse6 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xnp1~0) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-10-13 07:32:19,072 WARN L860 $PredicateComparison]: unable to prove that (and (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse5 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse2 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5)) (.cse3 (fp.mul c_currentRoundingMode .cse4 .cse5))) (let ((.cse0 (fp.gt .cse2 .cse3)) (.cse1 (fp.lt .cse2 (fp.neg .cse3)))) (or (and (not .cse0) (not .cse1) (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv0 32))) (and (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv1 32)) (or .cse0 .cse1)))))) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= (fp.div c_currentRoundingMode .cse6 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xnp1~0) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-10-13 07:32:47,781 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse4 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse1 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse3) .cse4)) (.cse2 (fp.mul c_currentRoundingMode .cse3 .cse4))) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xnp1~0) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0))))) (= c_currentRoundingMode roundNearestTiesToEven) (not (fp.gt .cse1 .cse2)) (not (fp.lt .cse1 (fp.neg .cse2)))))) is different from false [2021-10-13 07:32:49,853 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse4 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse1 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse3) .cse4)) (.cse2 (fp.mul c_currentRoundingMode .cse3 .cse4))) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xnp1~0) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0))))) (= c_currentRoundingMode roundNearestTiesToEven) (not (fp.gt .cse1 .cse2)) (not (fp.lt .cse1 (fp.neg .cse2)))))) is different from true [2021-10-13 07:32:55,576 WARN L207 SmtUtils]: Spent 5.69 s on a formula simplification that was a NOOP. DAG size: 15 [2021-10-13 07:33:01,052 WARN L207 SmtUtils]: Spent 5.47 s on a formula simplification. DAG size of input: 16 DAG size of output: 1 [2021-10-13 07:33:06,641 WARN L207 SmtUtils]: Spent 5.59 s on a formula simplification that was a NOOP. DAG size: 6 [2021-10-13 07:33:12,253 WARN L207 SmtUtils]: Spent 5.61 s on a formula simplification that was a NOOP. DAG size: 5 [2021-10-13 07:33:17,456 WARN L207 SmtUtils]: Spent 5.20 s on a formula simplification that was a NOOP. DAG size: 8 [2021-10-13 07:33:19,890 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 ULTIMATE.start_SqrtR_~Input))) (and (not (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse1 (fp.add c_currentRoundingMode .cse2 .cse2))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse0) .cse1) (fp.mul c_currentRoundingMode .cse0 .cse1)))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse3)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= |c_ULTIMATE.start_SqrtR_#res| (fp.div c_currentRoundingMode .cse3 .cse2))))))) is different from false [2021-10-13 07:33:30,380 WARN L207 SmtUtils]: Spent 5.62 s on a formula simplification that was a NOOP. DAG size: 15 [2021-10-13 07:33:36,047 WARN L207 SmtUtils]: Spent 5.67 s on a formula simplification that was a NOOP. DAG size: 5 [2021-10-13 07:33:41,256 WARN L207 SmtUtils]: Spent 5.21 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:33:46,896 WARN L207 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 6 [2021-10-13 07:33:54,874 WARN L207 SmtUtils]: Spent 5.60 s on a formula simplification that was a NOOP. DAG size: 15 [2021-10-13 07:34:00,505 WARN L207 SmtUtils]: Spent 5.63 s on a formula simplification that was a NOOP. DAG size: 5 [2021-10-13 07:34:05,717 WARN L207 SmtUtils]: Spent 5.21 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:34:11,316 WARN L207 SmtUtils]: Spent 5.60 s on a formula simplification that was a NOOP. DAG size: 6 [2021-10-13 07:34:16,923 WARN L207 SmtUtils]: Spent 5.61 s on a formula simplification that was a NOOP. DAG size: 15 [2021-10-13 07:34:22,568 WARN L207 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 5 [2021-10-13 07:34:28,193 WARN L207 SmtUtils]: Spent 5.62 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:34:33,819 WARN L207 SmtUtils]: Spent 5.62 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:34:39,492 WARN L207 SmtUtils]: Spent 5.66 s on a formula simplification that was a NOOP. DAG size: 6 [2021-10-13 07:34:47,558 WARN L207 SmtUtils]: Spent 5.65 s on a formula simplification that was a NOOP. DAG size: 15 [2021-10-13 07:34:53,228 WARN L207 SmtUtils]: Spent 5.65 s on a formula simplification that was a NOOP. DAG size: 5 [2021-10-13 07:34:58,887 WARN L207 SmtUtils]: Spent 5.66 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-13 07:35:04,542 WARN L207 SmtUtils]: Spent 5.65 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-13 07:35:10,215 WARN L207 SmtUtils]: Spent 5.67 s on a formula simplification that was a NOOP. DAG size: 6 [2021-10-13 07:35:15,886 WARN L207 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 15 [2021-10-13 07:35:21,504 WARN L207 SmtUtils]: Spent 5.62 s on a formula simplification that was a NOOP. DAG size: 5 [2021-10-13 07:35:27,200 WARN L207 SmtUtils]: Spent 5.69 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-13 07:35:32,860 WARN L207 SmtUtils]: Spent 5.65 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:35:38,537 WARN L207 SmtUtils]: Spent 5.68 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:35:44,200 WARN L207 SmtUtils]: Spent 5.66 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-13 07:35:49,856 WARN L207 SmtUtils]: Spent 5.65 s on a formula simplification that was a NOOP. DAG size: 3 [2021-10-13 07:35:55,516 WARN L207 SmtUtils]: Spent 5.66 s on a formula simplification that was a NOOP. DAG size: 9 [2021-10-13 07:36:01,201 WARN L207 SmtUtils]: Spent 5.68 s on a formula simplification that was a NOOP. DAG size: 6 [2021-10-13 07:36:03,620 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse2 (fp.div roundNearestTiesToEven .cse6 ULTIMATE.start_SqrtR_~Input))) (and (not (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse1 (fp.add roundNearestTiesToEven .cse2 .cse2))) (fp.gt (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse0) .cse1) (fp.mul roundNearestTiesToEven .cse0 .cse1)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (let ((.cse5 (fp.div roundNearestTiesToEven .cse6 .cse2))) (let ((.cse4 (fp.leq .cse5 ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (.cse3 (fp.geq .cse5 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0))))) (or (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (or (not .cse3) (not .cse4))) (and .cse4 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) .cse3)))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6)))))) is different from false [2021-10-13 07:36:05,885 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse2 (fp.div roundNearestTiesToEven .cse6 ULTIMATE.start_SqrtR_~Input))) (and (not (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse1 (fp.add roundNearestTiesToEven .cse2 .cse2))) (fp.gt (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse0) .cse1) (fp.mul roundNearestTiesToEven .cse0 .cse1)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (let ((.cse5 (fp.div roundNearestTiesToEven .cse6 .cse2))) (let ((.cse4 (fp.leq .cse5 ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (.cse3 (fp.geq .cse5 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0))))) (or (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (or (not .cse3) (not .cse4))) (and .cse4 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) .cse3)))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6)))))) is different from true [2021-10-13 07:36:16,295 WARN L207 SmtUtils]: Spent 5.62 s on a formula simplification that was a NOOP. DAG size: 15 [2021-10-13 07:36:21,997 WARN L207 SmtUtils]: Spent 5.70 s on a formula simplification that was a NOOP. DAG size: 5 [2021-10-13 07:36:27,223 WARN L207 SmtUtils]: Spent 5.23 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:36:32,871 WARN L207 SmtUtils]: Spent 5.65 s on a formula simplification that was a NOOP. DAG size: 6 [2021-10-13 07:36:40,947 WARN L207 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 15 [2021-10-13 07:36:46,586 WARN L207 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 5 [2021-10-13 07:36:51,876 WARN L207 SmtUtils]: Spent 5.29 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:36:57,529 WARN L207 SmtUtils]: Spent 5.65 s on a formula simplification that was a NOOP. DAG size: 6 [2021-10-13 07:37:03,125 WARN L207 SmtUtils]: Spent 5.60 s on a formula simplification that was a NOOP. DAG size: 15 [2021-10-13 07:37:08,805 WARN L207 SmtUtils]: Spent 5.68 s on a formula simplification that was a NOOP. DAG size: 5 [2021-10-13 07:37:14,431 WARN L207 SmtUtils]: Spent 5.63 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:37:20,086 WARN L207 SmtUtils]: Spent 5.65 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:37:25,755 WARN L207 SmtUtils]: Spent 5.66 s on a formula simplification that was a NOOP. DAG size: 6 [2021-10-13 07:37:28,183 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse4 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse2 (fp.div roundNearestTiesToEven .cse4 ULTIMATE.start_SqrtR_~Input))) (and (not (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse1 (fp.add roundNearestTiesToEven .cse2 .cse2))) (fp.gt (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse0) .cse1) (fp.mul roundNearestTiesToEven .cse0 .cse1)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (let ((.cse3 (fp.div roundNearestTiesToEven .cse4 .cse2))) (or (not (fp.geq .cse3 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0)))) (not (fp.leq .cse3 ((_ to_fp 11 53) roundNearestTiesToEven 5.0))))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse4)))))) is different from false [2021-10-13 07:37:30,449 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse4 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse2 (fp.div roundNearestTiesToEven .cse4 ULTIMATE.start_SqrtR_~Input))) (and (not (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse1 (fp.add roundNearestTiesToEven .cse2 .cse2))) (fp.gt (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse0) .cse1) (fp.mul roundNearestTiesToEven .cse0 .cse1)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (let ((.cse3 (fp.div roundNearestTiesToEven .cse4 .cse2))) (or (not (fp.geq .cse3 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0)))) (not (fp.leq .cse3 ((_ to_fp 11 53) roundNearestTiesToEven 5.0))))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse4)))))) is different from true [2021-10-13 07:37:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:37:30,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:37:42,750 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))))) is different from false [2021-10-13 07:37:44,929 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))))) is different from true [2021-10-13 07:37:59,748 WARN L838 $PredicateComparison]: unable to prove that (or (not (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv0 32))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0)))))) is different from false [2021-10-13 07:38:01,951 WARN L860 $PredicateComparison]: unable to prove that (or (not (= c_ULTIMATE.start_SqrtR_~cond~0 (_ bv0 32))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0)))))) is different from true [2021-10-13 07:38:06,980 WARN L207 SmtUtils]: Spent 5.02 s on a formula simplification that was a NOOP. DAG size: 10 [2021-10-13 07:38:12,038 WARN L207 SmtUtils]: Spent 5.06 s on a formula simplification that was a NOOP. DAG size: 8 [2021-10-13 07:38:17,069 WARN L207 SmtUtils]: Spent 5.03 s on a formula simplification that was a NOOP. DAG size: 8 [2021-10-13 07:38:22,078 WARN L207 SmtUtils]: Spent 5.01 s on a formula simplification that was a NOOP. DAG size: 11 [2021-10-13 07:38:24,333 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (let ((.cse0 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse3)) (.cse1 (fp.mul c_currentRoundingMode c_~_EPS~0 .cse3))) (or (fp.gt .cse0 .cse1) (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xn~0))) (and (fp.leq .cse2 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))))) (fp.lt .cse0 (fp.neg .cse1))))) is different from false [2021-10-13 07:38:26,622 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (let ((.cse0 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse3)) (.cse1 (fp.mul c_currentRoundingMode c_~_EPS~0 .cse3))) (or (fp.gt .cse0 .cse1) (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xn~0))) (and (fp.leq .cse2 ((_ to_fp 11 53) c_currentRoundingMode 5.0)) (fp.geq .cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))))) (fp.lt .cse0 (fp.neg .cse1))))) is different from true [2021-10-13 07:38:32,500 WARN L207 SmtUtils]: Spent 5.87 s on a formula simplification that was a NOOP. DAG size: 14 [2021-10-13 07:38:38,340 WARN L207 SmtUtils]: Spent 5.84 s on a formula simplification that was a NOOP. DAG size: 5 [2021-10-13 07:38:39,704 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-13 07:38:39,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:38:39,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651079714] [2021-10-13 07:38:39,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-10-13 07:38:39,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1974723689] [2021-10-13 07:38:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:39,706 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:38:39,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:38:39,712 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:38:39,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-13 07:38:39,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:38:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:38:44,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-13 07:38:44,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684841392] [2021-10-13 07:38:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:44,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:44,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:44,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:38:44,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:42:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:42,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:42:42,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:42,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-13 07:42:42,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:42:42,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:42:42,704 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:42:42,704 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:42:42,710 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:42:42,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:43,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:43,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:43,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9252e49-cee9-43e8-8ba1-b4e30fe91596/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:42:43,320 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:42:43,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:42:43 BoogieIcfgContainer [2021-10-13 07:42:43,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:42:43,332 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:42:43,332 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:42:43,332 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:42:43,333 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:30:18" (3/4) ... [2021-10-13 07:42:43,335 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:42:43,335 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:42:43,336 INFO L168 Benchmark]: Toolchain (without parser) took 752932.97 ms. Allocated memory is still 79.7 MB. Free memory was 45.3 MB in the beginning and 29.8 MB in the end (delta: 15.5 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:43,336 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 79.7 MB. Free memory was 61.9 MB in the beginning and 61.8 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:42:43,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.39 ms. Allocated memory is still 79.7 MB. Free memory was 45.1 MB in the beginning and 64.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:43,337 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.19 ms. Allocated memory is still 79.7 MB. Free memory was 64.1 MB in the beginning and 62.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:43,338 INFO L168 Benchmark]: Boogie Preprocessor took 45.50 ms. Allocated memory is still 79.7 MB. Free memory was 62.4 MB in the beginning and 61.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:42:43,338 INFO L168 Benchmark]: RCFGBuilder took 7881.27 ms. Allocated memory is still 79.7 MB. Free memory was 61.1 MB in the beginning and 50.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:43,339 INFO L168 Benchmark]: TraceAbstraction took 744609.51 ms. Allocated memory is still 79.7 MB. Free memory was 50.2 MB in the beginning and 30.3 MB in the end (delta: 19.9 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:43,339 INFO L168 Benchmark]: Witness Printer took 3.30 ms. Allocated memory is still 79.7 MB. Free memory was 30.3 MB in the beginning and 29.8 MB in the end (delta: 528.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:43,345 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 79.7 MB. Free memory was 61.9 MB in the beginning and 61.8 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 309.39 ms. Allocated memory is still 79.7 MB. Free memory was 45.1 MB in the beginning and 64.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.19 ms. Allocated memory is still 79.7 MB. Free memory was 64.1 MB in the beginning and 62.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.50 ms. Allocated memory is still 79.7 MB. Free memory was 62.4 MB in the beginning and 61.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 7881.27 ms. Allocated memory is still 79.7 MB. Free memory was 61.1 MB in the beginning and 50.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 744609.51 ms. Allocated memory is still 79.7 MB. Free memory was 50.2 MB in the beginning and 30.3 MB in the end (delta: 19.9 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.1 GB. * Witness Printer took 3.30 ms. Allocated memory is still 79.7 MB. Free memory was 30.3 MB in the beginning and 29.8 MB in the end (delta: 528.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] double _EPS = 1e-6; [L49] double d, r; [L51] d = __VERIFIER_nondet_double() [L18] COND FALSE !(!cond) [L26] double xn, xnp1, residu, lsup, linf; [L27] int i, cond; [L28] COND FALSE !(Input <= 1.0) [L28] xn = 1.0/Input [L29] xnp1 = xn [L30] residu = 2.0*_EPS*(xn+xnp1) [L31] lsup = _EPS * (xn+xnp1) [L32] linf = -lsup [L33] cond = ((residu > lsup) || (residu < linf)) [L34] i = 0 [L35] COND FALSE !(\read(cond)) [L44] return 1.0 / xnp1; [L54] r = SqrtR(d) [L20] COND TRUE !(cond) [L20] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 744528.3ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 9.9ms, AutomataDifference: 22184.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 1 SDslu, 10 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 18253.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 10720.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 30.0ms SsaConstructionTime, 2586.8ms SatisfiabilityAnalysisTime, 31842.4ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 5 QuantifiedInterpolants, 313 SizeOfPredicates, 7 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...