./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V --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 2e48881fddee372e5aad046f2f519f188ef8a27fb46b046a6e106c678419a225 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:31:58,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:31:58,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:31:58,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:31:58,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:31:58,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:31:58,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:31:58,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:31:58,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:31:58,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:31:58,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:31:58,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:31:58,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:31:58,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:31:58,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:31:58,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:31:58,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:31:58,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:31:58,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:31:58,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:31:58,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:31:58,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:31:58,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:31:58,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:31:58,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:31:58,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:31:58,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:31:58,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:31:58,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:31:58,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:31:58,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:31:58,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:31:58,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:31:58,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:31:58,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:31:58,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:31:58,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:31:58,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:31:58,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:31:58,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:31:58,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:31:58,994 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:31:59,043 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:31:59,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:31:59,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:31:59,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:31:59,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:31:59,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:31:59,046 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:31:59,046 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:31:59,046 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:31:59,047 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:31:59,048 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:31:59,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:31:59,048 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:31:59,049 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:31:59,049 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:31:59,049 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:31:59,049 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:31:59,050 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:31:59,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:31:59,051 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:31:59,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:31:59,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:31:59,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:31:59,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:31:59,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:31:59,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:31:59,053 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:31:59,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:31:59,053 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:31:59,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:31:59,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:31:59,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:31:59,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:31:59,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:31:59,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:31:59,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:31:59,056 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:31:59,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:31:59,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:31:59,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:31:59,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:31:59,057 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_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e48881fddee372e5aad046f2f519f188ef8a27fb46b046a6e106c678419a225 [2021-11-23 02:31:59,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:31:59,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:31:59,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:31:59,466 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:31:59,467 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:31:59,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/floats-cdfpl/newton_2_6.i [2021-11-23 02:31:59,546 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/data/c61fbcf8c/6ac8f43153334e719ff7fe57ac634de3/FLAG9f08e9ebc [2021-11-23 02:32:00,193 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:32:00,195 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/sv-benchmarks/c/floats-cdfpl/newton_2_6.i [2021-11-23 02:32:00,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/data/c61fbcf8c/6ac8f43153334e719ff7fe57ac634de3/FLAG9f08e9ebc [2021-11-23 02:32:00,548 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/data/c61fbcf8c/6ac8f43153334e719ff7fe57ac634de3 [2021-11-23 02:32:00,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:32:00,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:32:00,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:32:00,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:32:00,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:32:00,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e93655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00, skipping insertion in model container [2021-11-23 02:32:00,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:32:00,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:32:00,787 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_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/sv-benchmarks/c/floats-cdfpl/newton_2_6.i[1743,1756] [2021-11-23 02:32:00,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:32:00,800 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:32:00,825 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_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/sv-benchmarks/c/floats-cdfpl/newton_2_6.i[1743,1756] [2021-11-23 02:32:00,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:32:00,837 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:32:00,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00 WrapperNode [2021-11-23 02:32:00,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:32:00,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:32:00,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:32:00,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:32:00,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,876 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 29 [2021-11-23 02:32:00,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:32:00,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:32:00,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:32:00,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:32:00,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:32:00,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:32:00,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:32:00,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:32:00,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (1/1) ... [2021-11-23 02:32:00,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:32:00,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:00,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:32:00,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:32:00,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:32:00,983 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-23 02:32:00,983 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-23 02:32:00,983 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-23 02:32:00,983 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-23 02:32:00,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:32:00,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:32:00,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:32:01,054 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:32:01,056 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:32:01,225 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:32:01,253 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:32:01,254 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:32:01,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:01 BoogieIcfgContainer [2021-11-23 02:32:01,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:32:01,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:32:01,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:32:01,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:32:01,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:32:00" (1/3) ... [2021-11-23 02:32:01,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256ee634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:01, skipping insertion in model container [2021-11-23 02:32:01,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:00" (2/3) ... [2021-11-23 02:32:01,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256ee634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:01, skipping insertion in model container [2021-11-23 02:32:01,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:01" (3/3) ... [2021-11-23 02:32:01,271 INFO L111 eAbstractionObserver]: Analyzing ICFG newton_2_6.i [2021-11-23 02:32:01,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:32:01,278 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:32:01,351 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:32:01,362 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 [2021-11-23 02:32:01,362 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:32:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:32:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:32:01,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:01,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:01,406 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:01,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1958672206, now seen corresponding path program 1 times [2021-11-23 02:32:01,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:01,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843264381] [2021-11-23 02:32:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:01,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:32:01,585 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:32:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:32:01,670 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:32:01,672 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:32:01,674 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:32:01,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:32:01,683 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-23 02:32:01,686 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:32:01,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:32:01 BoogieIcfgContainer [2021-11-23 02:32:01,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:32:01,725 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:32:01,725 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:32:01,725 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:32:01,726 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:01" (3/4) ... [2021-11-23 02:32:01,730 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:32:01,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:32:01,732 INFO L158 Benchmark]: Toolchain (without parser) took 1179.79ms. Allocated memory is still 100.7MB. Free memory was 69.9MB in the beginning and 71.4MB in the end (delta: -1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:32:01,733 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 77.6MB. Free memory was 57.3MB in the beginning and 57.3MB in the end (delta: 34.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:32:01,734 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.09ms. Allocated memory is still 100.7MB. Free memory was 69.7MB in the beginning and 59.4MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:32:01,735 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.27ms. Allocated memory is still 100.7MB. Free memory was 59.4MB in the beginning and 58.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:32:01,736 INFO L158 Benchmark]: Boogie Preprocessor took 26.19ms. Allocated memory is still 100.7MB. Free memory was 58.0MB in the beginning and 57.0MB in the end (delta: 981.4kB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:32:01,743 INFO L158 Benchmark]: RCFGBuilder took 355.53ms. Allocated memory is still 100.7MB. Free memory was 56.9MB in the beginning and 47.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:32:01,744 INFO L158 Benchmark]: TraceAbstraction took 460.49ms. Allocated memory is still 100.7MB. Free memory was 46.7MB in the beginning and 71.7MB in the end (delta: -25.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:32:01,745 INFO L158 Benchmark]: Witness Printer took 5.84ms. Allocated memory is still 100.7MB. Free memory was 71.7MB in the beginning and 71.4MB in the end (delta: 335.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:32:01,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 77.6MB. Free memory was 57.3MB in the beginning and 57.3MB in the end (delta: 34.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 284.09ms. Allocated memory is still 100.7MB. Free memory was 69.7MB in the beginning and 59.4MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.27ms. Allocated memory is still 100.7MB. Free memory was 59.4MB in the beginning and 58.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.19ms. Allocated memory is still 100.7MB. Free memory was 58.0MB in the beginning and 57.0MB in the end (delta: 981.4kB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 355.53ms. Allocated memory is still 100.7MB. Free memory was 56.9MB in the beginning and 47.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 460.49ms. Allocated memory is still 100.7MB. Free memory was 46.7MB in the beginning and 71.7MB in the end (delta: -25.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.84ms. Allocated memory is still 100.7MB. Free memory was 71.7MB in the beginning and 71.4MB in the end (delta: 335.8kB). 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: 51]: 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 40, overapproximation of someBinaryDOUBLEComparisonOperation at line 50, overapproximation of someBinaryArithmeticFLOAToperation at line 44. Possible FailurePath: [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L24] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L42] CALL, EXPR f(IN) VAL [\old(x)=50] [L29] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L42] RET, EXPR f(IN) VAL [f(IN)=51, IN=50] [L42] CALL, EXPR fp(IN) VAL [\old(x)=50] [L34] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L42] RET, EXPR fp(IN) VAL [f(IN)=51, fp(IN)=52, IN=50] [L42] float x = IN - f(IN)/fp(IN); [L44] CALL, EXPR f(x) VAL [\old(x)=53] [L29] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L44] RET, EXPR f(x) VAL [f(x)=49, IN=50, x=53] [L44] CALL, EXPR fp(x) VAL [\old(x)=53] [L34] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L44] RET, EXPR fp(x) VAL [f(x)=49, fp(x)=54, IN=50, x=53] [L44] x = x - f(x)/fp(x) [L50] COND TRUE !(x < 0.1) VAL [IN=50] [L51] reach_error() VAL [IN=50] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 17 NumberOfCodeBlocks, 17 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 [2021-11-23 02:32:01,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/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_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V --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 2e48881fddee372e5aad046f2f519f188ef8a27fb46b046a6e106c678419a225 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:32:04,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:32:04,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:32:04,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:32:04,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:32:04,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:32:04,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:32:04,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:32:04,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:32:04,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:32:04,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:32:04,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:32:04,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:32:04,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:32:04,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:32:04,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:32:04,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:32:04,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:32:04,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:32:04,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:32:04,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:32:04,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:32:04,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:32:04,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:32:04,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:32:04,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:32:04,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:32:04,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:32:04,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:32:04,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:32:04,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:32:04,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:32:04,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:32:04,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:32:04,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:32:04,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:32:04,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:32:04,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:32:04,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:32:04,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:32:04,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:32:04,613 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 02:32:04,661 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:32:04,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:32:04,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:32:04,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:32:04,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:32:04,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:32:04,664 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:32:04,665 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:32:04,665 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:32:04,665 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:32:04,667 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:32:04,667 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:32:04,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:32:04,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:32:04,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:32:04,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:32:04,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:32:04,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:32:04,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:32:04,671 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:32:04,671 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:32:04,671 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:32:04,671 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:32:04,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:32:04,672 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:32:04,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:32:04,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:32:04,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:32:04,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:32:04,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:32:04,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:32:04,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:32:04,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:32:04,675 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:32:04,675 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:32:04,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:32:04,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:32:04,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:32:04,676 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_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e48881fddee372e5aad046f2f519f188ef8a27fb46b046a6e106c678419a225 [2021-11-23 02:32:05,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:32:05,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:32:05,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:32:05,166 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:32:05,167 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:32:05,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/floats-cdfpl/newton_2_6.i [2021-11-23 02:32:05,242 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/data/cf0f8e626/6d1ec061462542798af0a464d24ae7a9/FLAG76c82fc77 [2021-11-23 02:32:05,762 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:32:05,765 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/sv-benchmarks/c/floats-cdfpl/newton_2_6.i [2021-11-23 02:32:05,772 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/data/cf0f8e626/6d1ec061462542798af0a464d24ae7a9/FLAG76c82fc77 [2021-11-23 02:32:06,115 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/data/cf0f8e626/6d1ec061462542798af0a464d24ae7a9 [2021-11-23 02:32:06,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:32:06,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:32:06,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:32:06,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:32:06,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:32:06,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd4ab9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06, skipping insertion in model container [2021-11-23 02:32:06,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:32:06,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:32:06,449 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_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/sv-benchmarks/c/floats-cdfpl/newton_2_6.i[1743,1756] [2021-11-23 02:32:06,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:32:06,471 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:32:06,504 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_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/sv-benchmarks/c/floats-cdfpl/newton_2_6.i[1743,1756] [2021-11-23 02:32:06,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:32:06,532 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:32:06,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06 WrapperNode [2021-11-23 02:32:06,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:32:06,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:32:06,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:32:06,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:32:06,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,588 INFO L137 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2021-11-23 02:32:06,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:32:06,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:32:06,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:32:06,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:32:06,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:32:06,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:32:06,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:32:06,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:32:06,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (1/1) ... [2021-11-23 02:32:06,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:32:06,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:06,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:32:06,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:32:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:32:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-23 02:32:06,749 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-23 02:32:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:32:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-23 02:32:06,750 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-23 02:32:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:32:06,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:32:06,837 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:32:06,840 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:32:13,530 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:32:13,536 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:32:13,536 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:32:13,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:13 BoogieIcfgContainer [2021-11-23 02:32:13,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:32:13,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:32:13,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:32:13,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:32:13,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:32:06" (1/3) ... [2021-11-23 02:32:13,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f7ef09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:13, skipping insertion in model container [2021-11-23 02:32:13,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:06" (2/3) ... [2021-11-23 02:32:13,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f7ef09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:13, skipping insertion in model container [2021-11-23 02:32:13,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:13" (3/3) ... [2021-11-23 02:32:13,546 INFO L111 eAbstractionObserver]: Analyzing ICFG newton_2_6.i [2021-11-23 02:32:13,551 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:32:13,552 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:32:13,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:32:13,622 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 [2021-11-23 02:32:13,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:32:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:32:13,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:32:13,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:13,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:13,658 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:13,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:13,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1905727787, now seen corresponding path program 1 times [2021-11-23 02:32:13,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:32:13,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669700516] [2021-11-23 02:32:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:13,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:32:13,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:32:13,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:32:13,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:32:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:16,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 02:32:16,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:32:16,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:32:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:32:16,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:32:16,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669700516] [2021-11-23 02:32:16,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669700516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:16,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:16,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:32:16,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452460714] [2021-11-23 02:32:16,901 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:16,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:32:16,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:32:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:32:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:32:16,954 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-23 02:32:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:16,974 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-23 02:32:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:32:16,977 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 24 [2021-11-23 02:32:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:16,985 INFO L225 Difference]: With dead ends: 43 [2021-11-23 02:32:16,985 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 02:32:16,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:32:16,994 INFO L933 BasicCegarLoop]: 24 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, 24 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 [2021-11-23 02:32:16,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:32:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 02:32:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 02:32:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.0) internal successors, (12), 12 states have internal predecessors, (12), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:32:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-23 02:32:17,033 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 24 [2021-11-23 02:32:17,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:17,034 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-23 02:32:17,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-23 02:32:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-23 02:32:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:32:17,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:17,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:17,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:17,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:32:17,262 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:17,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2124582505, now seen corresponding path program 1 times [2021-11-23 02:32:17,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:32:17,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704430587] [2021-11-23 02:32:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:17,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:32:17,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:32:17,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:32:17,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a290d-11f6-4b63-9eb9-7e4dba47dfd1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:40:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:40:37,865 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.