./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI --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 3bb1d9e312234d5c4f7ead2dcb51cc43e4ff3aebeffef1b0758f6a0d5be2ea9b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:27:54,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:27:54,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:27:54,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:27:54,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:27:54,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:27:54,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:27:54,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:27:54,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:27:54,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:27:54,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:27:54,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:27:54,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:27:54,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:27:54,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:27:54,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:27:54,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:27:54,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:27:54,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:27:54,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:27:54,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:27:54,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:27:54,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:27:54,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:27:54,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:27:54,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:27:54,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:27:54,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:27:54,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:27:54,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:27:54,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:27:54,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:27:54,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:27:54,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:27:54,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:27:54,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:27:54,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:27:54,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:27:54,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:27:54,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:27:54,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:27:54,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:27:54,941 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:27:54,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:27:54,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:27:54,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:27:54,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:27:54,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:27:54,943 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:27:54,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:27:54,944 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:27:54,944 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:27:54,945 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:27:54,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:27:54,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:27:54,945 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:27:54,946 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:27:54,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:27:54,946 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:27:54,946 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:27:54,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:27:54,947 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:27:54,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:27:54,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:27:54,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:27:54,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:27:54,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:27:54,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:27:54,948 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:27:54,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:27:54,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:27:54,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:27:54,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:27:54,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:27:54,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:54,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:27:54,950 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:27:54,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:27:54,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:27:54,950 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:27:54,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:27:54,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:27:54,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:27:54,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bb1d9e312234d5c4f7ead2dcb51cc43e4ff3aebeffef1b0758f6a0d5be2ea9b [2022-11-03 02:27:55,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:27:55,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:27:55,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:27:55,343 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:27:55,344 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:27:55,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2022-11-03 02:27:55,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/data/33e1e4922/2c9d2a3a3a314479b3068adf344146df/FLAG078832268 [2022-11-03 02:27:55,965 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:27:55,966 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2022-11-03 02:27:55,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/data/33e1e4922/2c9d2a3a3a314479b3068adf344146df/FLAG078832268 [2022-11-03 02:27:56,323 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/data/33e1e4922/2c9d2a3a3a314479b3068adf344146df [2022-11-03 02:27:56,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:27:56,331 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:27:56,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:56,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:27:56,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:27:56,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6b3364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56, skipping insertion in model container [2022-11-03 02:27:56,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:27:56,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:27:56,565 WARN L230 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_637a1d89-145d-4b2d-afac-0cf672b0c588/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2022-11-03 02:27:56,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:56,614 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:27:56,629 WARN L230 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_637a1d89-145d-4b2d-afac-0cf672b0c588/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2022-11-03 02:27:56,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:56,664 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:27:56,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56 WrapperNode [2022-11-03 02:27:56,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:56,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:56,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:27:56,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:27:56,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,707 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2022-11-03 02:27:56,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:56,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:27:56,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:27:56,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:27:56,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,749 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:27:56,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:27:56,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:27:56,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:27:56,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (1/1) ... [2022-11-03 02:27:56,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:56,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:56,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:27:56,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:27:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:27:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:27:56,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:27:56,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:27:56,921 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:27:56,923 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:27:57,132 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:27:57,288 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:27:57,288 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:27:57,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:57 BoogieIcfgContainer [2022-11-03 02:27:57,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:27:57,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:27:57,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:27:57,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:27:57,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:27:56" (1/3) ... [2022-11-03 02:27:57,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba60d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:57, skipping insertion in model container [2022-11-03 02:27:57,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:56" (2/3) ... [2022-11-03 02:27:57,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba60d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:57, skipping insertion in model container [2022-11-03 02:27:57,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:57" (3/3) ... [2022-11-03 02:27:57,300 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2022-11-03 02:27:57,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:27:57,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:27:57,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:27:57,375 INFO L357 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, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f4c7afe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:27:57,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:27:57,384 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) [2022-11-03 02:27:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:27:57,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:57,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:27:57,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2617893, now seen corresponding path program 1 times [2022-11-03 02:27:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:57,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697767196] [2022-11-03 02:27:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:57,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:27:57,592 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:27:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:27:57,663 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:27:57,666 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:27:57,668 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:27:57,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:27:57,676 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:27:57,683 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:27:57,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:27:57 BoogieIcfgContainer [2022-11-03 02:27:57,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:27:57,717 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:27:57,717 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:27:57,717 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:27:57,718 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:57" (3/4) ... [2022-11-03 02:27:57,722 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:27:57,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:27:57,724 INFO L158 Benchmark]: Toolchain (without parser) took 1392.72ms. Allocated memory is still 125.8MB. Free memory was 91.6MB in the beginning and 68.8MB in the end (delta: 22.8MB). Peak memory consumption was 20.0MB. Max. memory is 16.1GB. [2022-11-03 02:27:57,725 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 81.8MB. Free memory was 53.1MB in the beginning and 53.1MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:27:57,726 INFO L158 Benchmark]: CACSL2BoogieTranslator took 329.25ms. Allocated memory is still 125.8MB. Free memory was 91.3MB in the beginning and 100.6MB in the end (delta: -9.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:27:57,727 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.72ms. Allocated memory is still 125.8MB. Free memory was 100.6MB in the beginning and 99.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:27:57,728 INFO L158 Benchmark]: Boogie Preprocessor took 50.19ms. Allocated memory is still 125.8MB. Free memory was 99.0MB in the beginning and 97.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:27:57,733 INFO L158 Benchmark]: RCFGBuilder took 531.45ms. Allocated memory is still 125.8MB. Free memory was 97.6MB in the beginning and 83.9MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:27:57,734 INFO L158 Benchmark]: TraceAbstraction took 421.62ms. Allocated memory is still 125.8MB. Free memory was 83.5MB in the beginning and 69.2MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:27:57,735 INFO L158 Benchmark]: Witness Printer took 5.89ms. Allocated memory is still 125.8MB. Free memory was 69.2MB in the beginning and 68.8MB in the end (delta: 448.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:27:57,743 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 81.8MB. Free memory was 53.1MB in the beginning and 53.1MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 329.25ms. Allocated memory is still 125.8MB. Free memory was 91.3MB in the beginning and 100.6MB in the end (delta: -9.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.72ms. Allocated memory is still 125.8MB. Free memory was 100.6MB in the beginning and 99.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.19ms. Allocated memory is still 125.8MB. Free memory was 99.0MB in the beginning and 97.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 531.45ms. Allocated memory is still 125.8MB. Free memory was 97.6MB in the beginning and 83.9MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 421.62ms. Allocated memory is still 125.8MB. Free memory was 83.5MB in the beginning and 69.2MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 5.89ms. Allocated memory is still 125.8MB. Free memory was 69.2MB in the beginning and 68.8MB in the end (delta: 448.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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() [L52] CALL assume_abort_if_not(d >= 0.1 && d <= 20.0) [L18] COND FALSE !(!cond) [L52] RET assume_abort_if_not(d >= 0.1 && d <= 20.0) [L54] CALL, EXPR SqrtR(d) [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 [\old(Input)=54, _EPS=1/1000000, cond=0, i=0, Input=54, xn=1, xn=1] [L35] COND FALSE !(\read(cond)) [L44] return 1.0 / xnp1; [L54] RET, EXPR SqrtR(d) [L54] r = SqrtR(d) [L56] CALL __VERIFIER_assert(r >= 0.3 && r <= 5.) [L20] COND TRUE !(cond) VAL [\old(cond)=0, _EPS=1/1000000, cond=0] [L20] reach_error() VAL [\old(cond)=0, _EPS=1/1000000, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:27:57,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI --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 3bb1d9e312234d5c4f7ead2dcb51cc43e4ff3aebeffef1b0758f6a0d5be2ea9b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:28:00,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:28:00,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:28:00,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:28:00,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:28:00,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:28:00,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:28:00,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:28:00,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:28:00,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:28:00,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:28:00,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:28:00,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:28:00,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:28:00,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:28:00,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:28:00,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:28:00,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:28:00,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:28:00,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:28:00,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:28:00,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:28:00,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:28:00,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:28:00,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:28:00,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:28:00,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:28:00,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:28:00,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:28:00,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:28:00,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:28:00,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:28:00,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:28:00,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:28:00,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:28:00,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:28:00,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:28:00,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:28:00,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:28:00,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:28:00,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:28:00,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:28:00,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:28:00,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:28:00,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:28:00,359 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:28:00,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:28:00,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:28:00,360 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:28:00,360 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:28:00,361 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:28:00,361 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:28:00,361 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:28:00,361 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:28:00,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:28:00,362 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:28:00,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:28:00,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:28:00,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:28:00,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:28:00,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:28:00,363 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:28:00,363 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:28:00,364 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:28:00,364 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:28:00,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:28:00,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:28:00,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:28:00,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:28:00,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:28:00,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:28:00,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:28:00,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:28:00,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:28:00,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:28:00,366 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:28:00,366 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:28:00,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:28:00,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:28:00,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:28:00,367 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_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bb1d9e312234d5c4f7ead2dcb51cc43e4ff3aebeffef1b0758f6a0d5be2ea9b [2022-11-03 02:28:00,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:28:00,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:28:00,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:28:00,772 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:28:00,773 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:28:00,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2022-11-03 02:28:00,851 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/data/b52a32f44/45ffc6fb516f4eeb904621b182dba857/FLAGec6537ea9 [2022-11-03 02:28:01,442 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:28:01,443 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2022-11-03 02:28:01,455 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/data/b52a32f44/45ffc6fb516f4eeb904621b182dba857/FLAGec6537ea9 [2022-11-03 02:28:01,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/data/b52a32f44/45ffc6fb516f4eeb904621b182dba857 [2022-11-03 02:28:01,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:28:01,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:28:01,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:28:01,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:28:01,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:28:01,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:28:01" (1/1) ... [2022-11-03 02:28:01,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72612c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:01, skipping insertion in model container [2022-11-03 02:28:01,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:28:01" (1/1) ... [2022-11-03 02:28:01,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:28:01,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:28:02,020 WARN L230 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_637a1d89-145d-4b2d-afac-0cf672b0c588/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2022-11-03 02:28:02,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:28:02,071 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:28:02,109 WARN L230 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_637a1d89-145d-4b2d-afac-0cf672b0c588/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2022-11-03 02:28:02,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:28:02,130 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:28:02,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02 WrapperNode [2022-11-03 02:28:02,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:28:02,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:28:02,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:28:02,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:28:02,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,189 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2022-11-03 02:28:02,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:28:02,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:28:02,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:28:02,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:28:02,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,239 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:28:02,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:28:02,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:28:02,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:28:02,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (1/1) ... [2022-11-03 02:28:02,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:28:02,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:02,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:28:02,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:28:02,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:28:02,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:28:02,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:28:02,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:28:02,430 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:28:02,433 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:28:10,347 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:28:10,355 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:28:10,355 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:28:10,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:28:10 BoogieIcfgContainer [2022-11-03 02:28:10,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:28:10,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:28:10,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:28:10,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:28:10,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:28:01" (1/3) ... [2022-11-03 02:28:10,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331cd147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:28:10, skipping insertion in model container [2022-11-03 02:28:10,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:28:02" (2/3) ... [2022-11-03 02:28:10,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331cd147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:28:10, skipping insertion in model container [2022-11-03 02:28:10,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:28:10" (3/3) ... [2022-11-03 02:28:10,368 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2022-11-03 02:28:10,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:28:10,388 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:28:10,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:28:10,484 INFO L357 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, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e0e1349, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:28:10,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:28:10,492 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) [2022-11-03 02:28:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:28:10,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:10,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:10,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash 334453616, now seen corresponding path program 1 times [2022-11-03 02:28:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:28:10,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550365210] [2022-11-03 02:28:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:10,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:28:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:28:10,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:28:10,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:28:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:12,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:28:12,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:12,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:12,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:28:12,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550365210] [2022-11-03 02:28:12,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550365210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:12,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:12,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:28:12,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788825229] [2022-11-03 02:28:12,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:12,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:28:12,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:28:12,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:28:12,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:28:12,321 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) [2022-11-03 02:28:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:12,337 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-11-03 02:28:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:28:12,339 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 [2022-11-03 02:28:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:12,348 INFO L225 Difference]: With dead ends: 29 [2022-11-03 02:28:12,348 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 02:28:12,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:28:12,358 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:12,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:28:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 02:28:12,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-03 02:28:12,389 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) [2022-11-03 02:28:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-03 02:28:12,391 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2022-11-03 02:28:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:12,391 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-03 02:28:12,391 INFO L496 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) [2022-11-03 02:28:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-03 02:28:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:28:12,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:12,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:12,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:12,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:28:12,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1014511986, now seen corresponding path program 1 times [2022-11-03 02:28:12,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:28:12,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188747410] [2022-11-03 02:28:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:12,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:28:12,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:28:12,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:28:12,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:28:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:14,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:28:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:15,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:15,053 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:28:15,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188747410] [2022-11-03 02:28:15,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188747410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:15,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:15,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:28:15,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922069562] [2022-11-03 02:28:15,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:15,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:28:15,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:28:15,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:28:15,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:28:15,057 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-03 02:28:17,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:21,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:23,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:25,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:28,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.93s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:31,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:33,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:33,447 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-03 02:28:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:28:33,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-11-03 02:28:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:33,450 INFO L225 Difference]: With dead ends: 19 [2022-11-03 02:28:33,450 INFO L226 Difference]: Without dead ends: 14 [2022-11-03 02:28:33,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:28:33,452 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:33,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 7 Unknown, 0 Unchecked, 18.2s Time] [2022-11-03 02:28:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-03 02:28:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-03 02:28:33,457 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) [2022-11-03 02:28:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-03 02:28:33,458 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-11-03 02:28:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:33,458 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-03 02:28:33,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-03 02:28:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-03 02:28:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:28:33,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:33,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:33,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:33,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:28:33,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:33,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1505447948, now seen corresponding path program 1 times [2022-11-03 02:28:33,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:28:33,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149569788] [2022-11-03 02:28:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:33,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:28:33,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:28:33,665 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:28:33,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:28:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:41,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:28:41,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:59,305 WARN L833 $PredicateComparison]: unable to prove that (and (= ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)) c_~_EPS~0) (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= |c_ULTIMATE.start_SqrtR_~xn~0#1| (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-11-03 02:29:05,353 WARN L234 SmtUtils]: Spent 5.00s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:29:20,024 WARN L234 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:29:30,154 WARN L234 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:29:35,273 WARN L234 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:29:40,422 WARN L234 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:29:45,550 WARN L234 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:29:53,915 WARN L234 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:29:56,432 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse5 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)))) (let ((.cse3 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse5)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (and (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse1 (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (= .cse1 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse2) (not (let ((.cse4 (fp.add c_currentRoundingMode .cse1 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|))) (fp.gt (fp.mul c_currentRoundingMode .cse3 .cse4) (fp.mul c_currentRoundingMode .cse5 .cse4))))))) (= |c_ULTIMATE.start_SqrtR_~cond~0#1| (_ bv0 32))) (and (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse6 (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (= .cse6 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|) (let ((.cse7 (fp.add c_currentRoundingMode .cse6 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|))) (fp.gt (fp.mul c_currentRoundingMode .cse3 .cse7) (fp.mul c_currentRoundingMode .cse5 .cse7))) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse2)))) (= |c_ULTIMATE.start_SqrtR_~cond~0#1| (_ bv1 32)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-11-03 02:30:18,353 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (= .cse1 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (not (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse3 (fp.add c_currentRoundingMode .cse1 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse2) .cse3) (fp.mul c_currentRoundingMode .cse2 .cse3)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-11-03 02:30:24,087 WARN L234 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:30:29,381 WARN L234 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:30:35,148 WARN L234 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:30:40,845 WARN L234 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:30:43,309 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= (fp.div c_currentRoundingMode .cse0 .cse1) |c_ULTIMATE.start_SqrtR_#res#1|) (not (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse3 (fp.add c_currentRoundingMode .cse1 .cse1))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse2) .cse3) (fp.mul c_currentRoundingMode .cse2 .cse3)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-11-03 02:30:54,024 WARN L234 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:30:59,752 WARN L234 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:31:05,137 WARN L234 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:31:10,967 WARN L234 SmtUtils]: Spent 5.83s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:31:19,130 WARN L234 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:31:24,475 WARN L234 SmtUtils]: Spent 5.34s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:31:30,283 WARN L234 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:31:36,058 WARN L234 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:31:44,218 WARN L234 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:31:50,033 WARN L234 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:31:55,798 WARN L234 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:32:01,599 WARN L234 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:32:07,293 WARN L234 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:32:10,249 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0)))) (let ((.cse5 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0))) (.cse0 (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse2)) (.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 5.0)) (.cse7 ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (.cse8 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (or (and (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse3 (fp.div roundNearestTiesToEven .cse8 |ULTIMATE.start_SqrtR_~Input#1|))) (let ((.cse4 (fp.div roundNearestTiesToEven .cse8 .cse3))) (and (not (let ((.cse1 (fp.add roundNearestTiesToEven .cse3 .cse3))) (fp.gt (fp.mul roundNearestTiesToEven .cse0 .cse1) (fp.mul roundNearestTiesToEven .cse2 .cse1)))) (fp.geq .cse4 .cse5) (fp.leq .cse4 .cse6) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse7) (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse8)))))) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32))) (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv0 32)) (or (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse10 (fp.div roundNearestTiesToEven .cse8 |ULTIMATE.start_SqrtR_~Input#1|))) (and (not (let ((.cse9 (fp.add roundNearestTiesToEven .cse10 .cse10))) (fp.gt (fp.mul roundNearestTiesToEven .cse0 .cse9) (fp.mul roundNearestTiesToEven .cse2 .cse9)))) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse7) (not (fp.geq (fp.div roundNearestTiesToEven .cse8 .cse10) .cse5)) (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse8))))) (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse12 (fp.div roundNearestTiesToEven .cse8 |ULTIMATE.start_SqrtR_~Input#1|))) (and (not (let ((.cse11 (fp.add roundNearestTiesToEven .cse12 .cse12))) (fp.gt (fp.mul roundNearestTiesToEven .cse0 .cse11) (fp.mul roundNearestTiesToEven .cse2 .cse11)))) (not (fp.leq (fp.div roundNearestTiesToEven .cse8 .cse12) .cse6)) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse7) (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse8)))))))))) is different from false [2022-11-03 02:32:18,490 WARN L234 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:32:24,316 WARN L234 SmtUtils]: Spent 5.83s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:32:29,630 WARN L234 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:32:35,399 WARN L234 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:32:43,529 WARN L234 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:32:48,900 WARN L234 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:32:54,666 WARN L234 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:33:00,355 WARN L234 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:33:02,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-11-03 02:33:02,755 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-03 02:33:02,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149569788] [2022-11-03 02:33:02,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/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") [2022-11-03 02:33:02,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [910162941] [2022-11-03 02:33:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:02,759 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:02,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:02,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-03 02:33:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:07,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:33:07,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:07,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2022-11-03 02:33:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288711617] [2022-11-03 02:33:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:07,844 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:07,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:36:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:51,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:36:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:51,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2022-11-03 02:36:51,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:51,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-03 02:36:51,502 ERROR L170 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2022-11-03 02:36:51,502 INFO L359 BasicCegarLoop]: Counterexample might be feasible [2022-11-03 02:36:51,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:36:51,715 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2022-11-03 02:36:51,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:51,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:51,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:52,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_637a1d89-145d-4b2d-afac-0cf672b0c588/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:52,133 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-03 02:36:52,135 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:36:52,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:36:52 BoogieIcfgContainer [2022-11-03 02:36:52,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:36:52,148 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:36:52,148 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:36:52,148 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:36:52,149 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:28:10" (3/4) ... [2022-11-03 02:36:52,152 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:36:52,152 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:36:52,152 INFO L158 Benchmark]: Toolchain (without parser) took 530346.29ms. Allocated memory is still 60.8MB. Free memory was 36.5MB in the beginning and 30.7MB in the end (delta: 5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:36:52,153 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 48.2MB. Free memory is still 27.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:36:52,153 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.62ms. Allocated memory is still 60.8MB. Free memory was 36.2MB in the beginning and 42.7MB in the end (delta: -6.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:36:52,154 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.99ms. Allocated memory is still 60.8MB. Free memory was 42.7MB in the beginning and 40.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:36:52,154 INFO L158 Benchmark]: Boogie Preprocessor took 61.99ms. Allocated memory is still 60.8MB. Free memory was 40.9MB in the beginning and 39.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:36:52,154 INFO L158 Benchmark]: RCFGBuilder took 8104.51ms. Allocated memory is still 60.8MB. Free memory was 39.5MB in the beginning and 28.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:36:52,155 INFO L158 Benchmark]: TraceAbstraction took 521786.88ms. Allocated memory is still 60.8MB. Free memory was 28.1MB in the beginning and 31.1MB in the end (delta: -3.0MB). Peak memory consumption was 302.7kB. Max. memory is 16.1GB. [2022-11-03 02:36:52,155 INFO L158 Benchmark]: Witness Printer took 4.34ms. Allocated memory is still 60.8MB. Free memory was 31.1MB in the beginning and 30.7MB in the end (delta: 387.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:36:52,157 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 48.2MB. Free memory is still 27.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.62ms. Allocated memory is still 60.8MB. Free memory was 36.2MB in the beginning and 42.7MB in the end (delta: -6.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.99ms. Allocated memory is still 60.8MB. Free memory was 42.7MB in the beginning and 40.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 61.99ms. Allocated memory is still 60.8MB. Free memory was 40.9MB in the beginning and 39.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 8104.51ms. Allocated memory is still 60.8MB. Free memory was 39.5MB in the beginning and 28.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 521786.88ms. Allocated memory is still 60.8MB. Free memory was 28.1MB in the beginning and 31.1MB in the end (delta: -3.0MB). Peak memory consumption was 302.7kB. Max. memory is 16.1GB. * Witness Printer took 4.34ms. Allocated memory is still 60.8MB. Free memory was 31.1MB in the beginning and 30.7MB in the end (delta: 387.2kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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() [L52] CALL assume_abort_if_not(d >= 0.1 && d <= 20.0) [L18] COND FALSE !(!cond) [L52] RET assume_abort_if_not(d >= 0.1 && d <= 20.0) [L54] CALL, EXPR SqrtR(d) [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] RET, EXPR SqrtR(d) [L54] r = SqrtR(d) [L56] CALL __VERIFIER_assert(r >= 0.3 && r <= 5.) [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: 521.7s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 18.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 18.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 38 SdHoareTripleChecker+Invalid, 17.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12 IncrementalHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 25 mSDtfsCounter, 12 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 10.3s SatisfiabilityAnalysisTime, 262.8s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 67 SizeOfPredicates, 7 NumberOfNonLiveVariables, 108 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN