./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/newton_1_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/newton_1_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8 --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 0e13901d32c156230f10c0b36b99da90b7fc076965ff4471bab19cd4b374914b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:53:18,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:53:18,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:53:18,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:53:18,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:53:18,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:53:18,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:53:18,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:53:18,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:53:18,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:53:18,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:53:18,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:53:18,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:53:18,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:53:18,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:53:18,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:53:18,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:53:18,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:53:18,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:53:18,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:53:18,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:53:18,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:53:18,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:53:18,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:53:18,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:53:18,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:53:18,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:53:18,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:53:18,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:53:18,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:53:18,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:53:18,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:53:18,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:53:18,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:53:18,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:53:18,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:53:18,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:53:18,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:53:18,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:53:18,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:53:18,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:53:18,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:53:18,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:53:18,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:53:18,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:53:18,983 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:53:18,983 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:53:18,983 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:53:18,983 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:53:18,984 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:53:18,990 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:53:18,990 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:53:18,992 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:53:18,992 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:53:18,992 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:53:18,992 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:53:18,993 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:53:18,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:53:18,994 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:53:18,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:53:18,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:53:18,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:53:18,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:53:18,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:53:18,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:53:18,995 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:53:18,996 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:53:18,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:53:18,996 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:53:18,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:53:18,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:53:18,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:53:18,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:53:18,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:53:18,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:53:19,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:53:19,000 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:53:19,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:53:19,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:53:19,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:53:19,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:53:19,001 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e13901d32c156230f10c0b36b99da90b7fc076965ff4471bab19cd4b374914b [2021-11-07 01:53:19,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:53:19,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:53:19,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:53:19,308 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:53:19,309 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:53:19,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/floats-cdfpl/newton_1_2.i [2021-11-07 01:53:19,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/data/b0e9e3d63/87a36c6b70b04343b5420791003ef8bf/FLAG7cc0b9952 [2021-11-07 01:53:19,872 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:53:19,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/sv-benchmarks/c/floats-cdfpl/newton_1_2.i [2021-11-07 01:53:19,878 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/data/b0e9e3d63/87a36c6b70b04343b5420791003ef8bf/FLAG7cc0b9952 [2021-11-07 01:53:20,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/data/b0e9e3d63/87a36c6b70b04343b5420791003ef8bf [2021-11-07 01:53:20,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:53:20,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:53:20,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:53:20,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:53:20,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:53:20,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3b46f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20, skipping insertion in model container [2021-11-07 01:53:20,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:53:20,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:53:20,542 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/sv-benchmarks/c/floats-cdfpl/newton_1_2.i[1224,1237] [2021-11-07 01:53:20,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:53:20,562 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:53:20,584 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/sv-benchmarks/c/floats-cdfpl/newton_1_2.i[1224,1237] [2021-11-07 01:53:20,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:53:20,599 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:53:20,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20 WrapperNode [2021-11-07 01:53:20,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:53:20,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:53:20,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:53:20,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:53:20,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:53:20,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:53:20,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:53:20,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:53:20,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:53:20,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:53:20,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:53:20,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:53:20,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (1/1) ... [2021-11-07 01:53:20,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:53:20,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:20,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:53:20,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:53:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:53:20,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:53:20,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:53:20,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:53:21,090 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:53:21,091 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-07 01:53:21,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:21 BoogieIcfgContainer [2021-11-07 01:53:21,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:53:21,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:53:21,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:53:21,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:53:21,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:53:20" (1/3) ... [2021-11-07 01:53:21,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326ebc0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:21, skipping insertion in model container [2021-11-07 01:53:21,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:20" (2/3) ... [2021-11-07 01:53:21,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326ebc0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:21, skipping insertion in model container [2021-11-07 01:53:21,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:21" (3/3) ... [2021-11-07 01:53:21,113 INFO L111 eAbstractionObserver]: Analyzing ICFG newton_1_2.i [2021-11-07 01:53:21,119 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:53:21,119 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:53:21,179 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:53:21,185 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:53:21,186 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:53:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:53:21,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:21,203 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:53:21,204 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:53:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash 62017, now seen corresponding path program 1 times [2021-11-07 01:53:21,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:53:21,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53668616] [2021-11-07 01:53:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:21,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:53:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:53:21,351 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:53:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:53:21,408 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 01:53:21,412 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:53:21,413 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:53:21,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:53:21,419 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-11-07 01:53:21,422 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:53:21,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:53:21 BoogieIcfgContainer [2021-11-07 01:53:21,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:53:21,447 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:53:21,447 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:53:21,447 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:53:21,448 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:21" (3/4) ... [2021-11-07 01:53:21,452 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:53:21,452 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:53:21,458 INFO L168 Benchmark]: Toolchain (without parser) took 1199.88 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 56.3 MB in the beginning and 54.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:53:21,458 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:53:21,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.42 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 56.1 MB in the beginning and 81.4 MB in the end (delta: -25.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:53:21,462 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.47 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 80.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:53:21,462 INFO L168 Benchmark]: Boogie Preprocessor took 21.39 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:53:21,463 INFO L168 Benchmark]: RCFGBuilder took 435.88 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 67.5 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:53:21,470 INFO L168 Benchmark]: TraceAbstraction took 348.14 ms. Allocated memory is still 104.9 MB. Free memory was 67.1 MB in the beginning and 54.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:53:21,478 INFO L168 Benchmark]: Witness Printer took 5.89 ms. Allocated memory is still 104.9 MB. Free memory was 54.6 MB in the beginning and 54.2 MB in the end (delta: 411.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:53:21,490 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 342.42 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 56.1 MB in the beginning and 81.4 MB in the end (delta: -25.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.47 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 80.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.39 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 435.88 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 67.5 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 348.14 ms. Allocated memory is still 104.9 MB. Free memory was 67.1 MB in the beginning and 54.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 5.89 ms. Allocated memory is still 104.9 MB. Free memory was 54.6 MB in the beginning and 54.2 MB in the end (delta: 411.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 42]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 31, overapproximation of someBinaryDOUBLEComparisonOperation at line 41, overapproximation of someBinaryArithmeticFLOAToperation at line 20. Possible FailurePath: [L30] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L20] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L25] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L33] float x = IN - f(IN)/fp(IN); [L41] COND TRUE !(x < 0.1) [L42] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 01:53:21,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/newton_1_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8 --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 0e13901d32c156230f10c0b36b99da90b7fc076965ff4471bab19cd4b374914b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:53:24,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:53:24,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:53:24,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:53:24,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:53:24,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:53:24,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:53:24,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:53:24,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:53:24,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:53:24,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:53:24,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:53:24,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:53:24,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:53:24,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:53:24,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:53:24,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:53:24,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:53:24,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:53:24,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:53:24,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:53:24,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:53:24,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:53:24,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:53:24,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:53:24,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:53:24,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:53:24,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:53:24,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:53:24,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:53:24,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:53:24,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:53:24,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:53:24,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:53:24,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:53:24,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:53:24,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:53:24,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:53:24,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:53:24,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:53:24,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:53:24,165 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:53:24,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:53:24,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:53:24,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:53:24,191 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:53:24,191 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:53:24,191 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:53:24,192 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:53:24,192 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:53:24,192 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:53:24,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:53:24,193 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:53:24,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:53:24,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:53:24,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:53:24,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:53:24,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:53:24,194 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:53:24,195 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:53:24,195 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:53:24,195 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:53:24,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:53:24,195 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:53:24,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:53:24,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:53:24,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:53:24,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:53:24,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:53:24,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:53:24,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:53:24,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:53:24,198 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:53:24,198 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:24,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:53:24,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:53:24,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:53:24,199 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_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e13901d32c156230f10c0b36b99da90b7fc076965ff4471bab19cd4b374914b [2021-11-07 01:53:24,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:53:24,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:53:24,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:53:24,559 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:53:24,560 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:53:24,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/floats-cdfpl/newton_1_2.i [2021-11-07 01:53:24,625 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/data/d04adaf67/4e7a840e2a9f42c6854eeb3130b49e90/FLAGe59e4ce1b [2021-11-07 01:53:25,173 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:53:25,173 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/sv-benchmarks/c/floats-cdfpl/newton_1_2.i [2021-11-07 01:53:25,181 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/data/d04adaf67/4e7a840e2a9f42c6854eeb3130b49e90/FLAGe59e4ce1b [2021-11-07 01:53:25,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/data/d04adaf67/4e7a840e2a9f42c6854eeb3130b49e90 [2021-11-07 01:53:25,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:53:25,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:53:25,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:53:25,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:53:25,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:53:25,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43abcc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25, skipping insertion in model container [2021-11-07 01:53:25,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:53:25,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:53:25,723 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/sv-benchmarks/c/floats-cdfpl/newton_1_2.i[1224,1237] [2021-11-07 01:53:25,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:53:25,770 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:53:25,794 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/sv-benchmarks/c/floats-cdfpl/newton_1_2.i[1224,1237] [2021-11-07 01:53:25,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:53:25,815 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:53:25,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25 WrapperNode [2021-11-07 01:53:25,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:53:25,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:53:25,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:53:25,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:53:25,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:53:25,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:53:25,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:53:25,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:53:25,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:53:25,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:53:25,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:53:25,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:53:25,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (1/1) ... [2021-11-07 01:53:25,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:53:25,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:25,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:53:25,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:53:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:53:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:53:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:53:25,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:53:31,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:53:31,111 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-07 01:53:31,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:31 BoogieIcfgContainer [2021-11-07 01:53:31,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:53:31,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:53:31,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:53:31,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:53:31,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:53:25" (1/3) ... [2021-11-07 01:53:31,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cb3a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:31, skipping insertion in model container [2021-11-07 01:53:31,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:25" (2/3) ... [2021-11-07 01:53:31,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cb3a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:31, skipping insertion in model container [2021-11-07 01:53:31,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:31" (3/3) ... [2021-11-07 01:53:31,142 INFO L111 eAbstractionObserver]: Analyzing ICFG newton_1_2.i [2021-11-07 01:53:31,149 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:53:31,149 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:53:31,201 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:53:31,208 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:53:31,208 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:53:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:53:31,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:31,229 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:31,230 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:53:31,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash 119351050, now seen corresponding path program 1 times [2021-11-07 01:53:31,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:31,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067192318] [2021-11-07 01:53:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:31,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:31,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:31,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:31,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:53:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:32,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:53:32,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:32,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:32,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:32,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067192318] [2021-11-07 01:53:32,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067192318] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:32,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:32,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:53:32,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799415149] [2021-11-07 01:53:32,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:53:32,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:53:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:53:32,742 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:32,760 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-11-07 01:53:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:53:32,762 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) Word has length 8 [2021-11-07 01:53:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:32,772 INFO L225 Difference]: With dead ends: 23 [2021-11-07 01:53:32,772 INFO L226 Difference]: Without dead ends: 9 [2021-11-07 01:53:32,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:53:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-07 01:53:32,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-07 01:53:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.0) internal successors, (8), 8 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8 transitions. [2021-11-07 01:53:32,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 8 transitions. Word has length 8 [2021-11-07 01:53:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:32,808 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 8 transitions. [2021-11-07 01:53:32,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 8 transitions. [2021-11-07 01:53:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:53:32,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:32,811 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:32,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:33,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:33,025 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:53:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:33,026 INFO L85 PathProgramCache]: Analyzing trace with hash 176609352, now seen corresponding path program 1 times [2021-11-07 01:53:33,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:33,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137902585] [2021-11-07 01:53:33,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:33,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:33,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:33,029 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:33,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a4e5d7-31f7-415a-bd22-76371d2b3a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process