./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/newton_2_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/newton_2_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9 --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 44e41a637fa9468dc0732b4bb0eab375ec0174d4f214854050209bd1011a360f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 19:00:38,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:00:38,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:00:38,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:00:38,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:00:38,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:00:38,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:00:38,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:00:38,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:00:38,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:00:38,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:00:38,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:00:38,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:00:38,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:00:38,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:00:38,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:00:38,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:00:38,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:00:38,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:00:38,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:00:38,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:00:38,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:00:38,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:00:38,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:00:38,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:00:38,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:00:38,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:00:38,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:00:38,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:00:38,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:00:38,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:00:38,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:00:38,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:00:38,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:00:38,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:00:38,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:00:38,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:00:38,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:00:38,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:00:38,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:00:38,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:00:38,168 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:00:38,203 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:00:38,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:00:38,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:00:38,204 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:00:38,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:00:38,205 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:00:38,206 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:00:38,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:00:38,206 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:00:38,206 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:00:38,207 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:00:38,207 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:00:38,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:00:38,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:00:38,208 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:00:38,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:00:38,208 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:00:38,209 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:00:38,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:00:38,210 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:00:38,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:00:38,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:00:38,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:00:38,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:00:38,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:00:38,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:00:38,211 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:00:38,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:00:38,211 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:00:38,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:00:38,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:00:38,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:00:38,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:00:38,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:00:38,213 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:00:38,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:00:38,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:00:38,213 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:00:38,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:00:38,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:00:38,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:00:38,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44e41a637fa9468dc0732b4bb0eab375ec0174d4f214854050209bd1011a360f [2022-11-20 19:00:38,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:00:38,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:00:38,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:00:38,506 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:00:38,507 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:00:38,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/floats-cdfpl/newton_2_4.i [2022-11-20 19:00:41,564 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:00:41,794 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:00:41,795 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/sv-benchmarks/c/floats-cdfpl/newton_2_4.i [2022-11-20 19:00:41,803 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/data/1fdc4256a/6a379e6831ac468aab7b430069a3ebf0/FLAG12060d0d9 [2022-11-20 19:00:41,823 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/data/1fdc4256a/6a379e6831ac468aab7b430069a3ebf0 [2022-11-20 19:00:41,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:00:41,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:00:41,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:00:41,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:00:41,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:00:41,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:00:41" (1/1) ... [2022-11-20 19:00:41,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f295780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:41, skipping insertion in model container [2022-11-20 19:00:41,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:00:41" (1/1) ... [2022-11-20 19:00:41,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:00:41,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:00:42,023 WARN L237 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_e6099618-dc5b-48ab-8131-4641edf7dea0/sv-benchmarks/c/floats-cdfpl/newton_2_4.i[1743,1756] [2022-11-20 19:00:42,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:00:42,036 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:00:42,052 WARN L237 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_e6099618-dc5b-48ab-8131-4641edf7dea0/sv-benchmarks/c/floats-cdfpl/newton_2_4.i[1743,1756] [2022-11-20 19:00:42,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:00:42,067 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:00:42,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42 WrapperNode [2022-11-20 19:00:42,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:00:42,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:00:42,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:00:42,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:00:42,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,103 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 29 [2022-11-20 19:00:42,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:00:42,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:00:42,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:00:42,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:00:42,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,124 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:00:42,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:00:42,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:00:42,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:00:42,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (1/1) ... [2022-11-20 19:00:42,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:00:42,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:00:42,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:00:42,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:00:42,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:00:42,209 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-20 19:00:42,210 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-20 19:00:42,210 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-20 19:00:42,210 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-20 19:00:42,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:00:42,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:00:42,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:00:42,301 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:00:42,304 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:00:42,471 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:00:42,523 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:00:42,523 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 19:00:42,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:00:42 BoogieIcfgContainer [2022-11-20 19:00:42,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:00:42,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:00:42,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:00:42,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:00:42,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:00:41" (1/3) ... [2022-11-20 19:00:42,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d3375e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:00:42, skipping insertion in model container [2022-11-20 19:00:42,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:42" (2/3) ... [2022-11-20 19:00:42,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d3375e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:00:42, skipping insertion in model container [2022-11-20 19:00:42,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:00:42" (3/3) ... [2022-11-20 19:00:42,536 INFO L112 eAbstractionObserver]: Analyzing ICFG newton_2_4.i [2022-11-20 19:00:42,575 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:00:42,575 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:00:42,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:00:42,638 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b20e297, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:00:42,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:00:42,643 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) [2022-11-20 19:00:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 19:00:42,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:42,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:42,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:00:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:42,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1958672206, now seen corresponding path program 1 times [2022-11-20 19:00:42,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:42,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432273108] [2022-11-20 19:00:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:42,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:00:42,851 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 19:00:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:00:42,923 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 19:00:42,926 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 19:00:42,927 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 19:00:42,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:00:42,937 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-20 19:00:42,942 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 19:00:42,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:00:42 BoogieIcfgContainer [2022-11-20 19:00:42,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 19:00:42,981 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 19:00:42,982 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 19:00:42,982 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 19:00:42,983 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:00:42" (3/4) ... [2022-11-20 19:00:42,990 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 19:00:42,990 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 19:00:42,991 INFO L158 Benchmark]: Toolchain (without parser) took 1158.66ms. Allocated memory is still 163.6MB. Free memory was 133.4MB in the beginning and 92.2MB in the end (delta: 41.2MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2022-11-20 19:00:42,992 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory was 74.6MB in the beginning and 74.4MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 19:00:42,993 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.91ms. Allocated memory is still 163.6MB. Free memory was 132.8MB in the beginning and 123.1MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 19:00:42,995 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.72ms. Allocated memory is still 163.6MB. Free memory was 122.9MB in the beginning and 121.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 19:00:42,996 INFO L158 Benchmark]: Boogie Preprocessor took 23.27ms. Allocated memory is still 163.6MB. Free memory was 121.5MB in the beginning and 120.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 19:00:43,001 INFO L158 Benchmark]: RCFGBuilder took 397.79ms. Allocated memory is still 163.6MB. Free memory was 120.2MB in the beginning and 109.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 19:00:43,003 INFO L158 Benchmark]: TraceAbstraction took 450.31ms. Allocated memory is still 163.6MB. Free memory was 108.4MB in the beginning and 92.9MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-20 19:00:43,004 INFO L158 Benchmark]: Witness Printer took 8.91ms. Allocated memory is still 163.6MB. Free memory was 92.9MB in the beginning and 92.2MB in the end (delta: 653.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 19:00:43,012 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory was 74.6MB in the beginning and 74.4MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 231.91ms. Allocated memory is still 163.6MB. Free memory was 132.8MB in the beginning and 123.1MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.72ms. Allocated memory is still 163.6MB. Free memory was 122.9MB in the beginning and 121.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.27ms. Allocated memory is still 163.6MB. Free memory was 121.5MB in the beginning and 120.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 397.79ms. Allocated memory is still 163.6MB. Free memory was 120.2MB in the beginning and 109.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 450.31ms. Allocated memory is still 163.6MB. Free memory was 108.4MB in the beginning and 92.9MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Witness Printer took 8.91ms. Allocated memory is still 163.6MB. Free memory was 92.9MB in the beginning and 92.2MB in the end (delta: 653.3kB). 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 > -0.8f && IN < 0.8f) [L24] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L42] CALL, EXPR f(IN) VAL [\old(x)=54] [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)=55, IN=54] [L42] CALL, EXPR fp(IN) VAL [\old(x)=54] [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)=55, fp(IN)=56, IN=54] [L42] float x = IN - f(IN)/fp(IN); [L44] CALL, EXPR f(x) VAL [\old(x)=57] [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)=53, IN=54, x=57] [L44] CALL, EXPR fp(x) VAL [\old(x)=57] [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)=53, fp(x)=58, IN=54, x=57] [L44] x = x - f(x)/fp(x) [L50] COND TRUE !(x < 0.1) VAL [IN=54] [L51] reach_error() VAL [IN=54] - 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, 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 [2022-11-20 19:00:43,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/newton_2_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9 --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 44e41a637fa9468dc0732b4bb0eab375ec0174d4f214854050209bd1011a360f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 19:00:45,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:00:45,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:00:45,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:00:45,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:00:45,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:00:45,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:00:45,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:00:45,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:00:45,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:00:45,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:00:45,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:00:45,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:00:45,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:00:45,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:00:45,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:00:45,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:00:45,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:00:45,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:00:45,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:00:45,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:00:45,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:00:45,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:00:45,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:00:45,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:00:45,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:00:45,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:00:45,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:00:45,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:00:45,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:00:45,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:00:45,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:00:45,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:00:45,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:00:45,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:00:45,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:00:45,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:00:45,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:00:45,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:00:45,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:00:45,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:00:45,788 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-20 19:00:45,830 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:00:45,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:00:45,832 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:00:45,832 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:00:45,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:00:45,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:00:45,834 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:00:45,834 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:00:45,834 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:00:45,835 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:00:45,836 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:00:45,836 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:00:45,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:00:45,837 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:00:45,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:00:45,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:00:45,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:00:45,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:00:45,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:00:45,839 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 19:00:45,839 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 19:00:45,839 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 19:00:45,840 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:00:45,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:00:45,840 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:00:45,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:00:45,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:00:45,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 19:00:45,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:00:45,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:00:45,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:00:45,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:00:45,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:00:45,843 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 19:00:45,843 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 19:00:45,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:00:45,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:00:45,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 19:00:45,844 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_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44e41a637fa9468dc0732b4bb0eab375ec0174d4f214854050209bd1011a360f [2022-11-20 19:00:46,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:00:46,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:00:46,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:00:46,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:00:46,265 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:00:46,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/floats-cdfpl/newton_2_4.i [2022-11-20 19:00:49,503 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:00:49,794 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:00:49,795 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/sv-benchmarks/c/floats-cdfpl/newton_2_4.i [2022-11-20 19:00:49,805 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/data/1bab4ed09/cd208073b96c4e948fa79e97ecbd6542/FLAG6ebef5b1f [2022-11-20 19:00:49,833 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/data/1bab4ed09/cd208073b96c4e948fa79e97ecbd6542 [2022-11-20 19:00:49,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:00:49,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:00:49,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:00:49,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:00:49,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:00:49,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:00:49" (1/1) ... [2022-11-20 19:00:49,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c9df3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:49, skipping insertion in model container [2022-11-20 19:00:49,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:00:49" (1/1) ... [2022-11-20 19:00:49,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:00:49,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:00:50,083 WARN L237 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_e6099618-dc5b-48ab-8131-4641edf7dea0/sv-benchmarks/c/floats-cdfpl/newton_2_4.i[1743,1756] [2022-11-20 19:00:50,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:00:50,098 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:00:50,117 WARN L237 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_e6099618-dc5b-48ab-8131-4641edf7dea0/sv-benchmarks/c/floats-cdfpl/newton_2_4.i[1743,1756] [2022-11-20 19:00:50,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:00:50,132 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:00:50,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50 WrapperNode [2022-11-20 19:00:50,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:00:50,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:00:50,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:00:50,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:00:50,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,164 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2022-11-20 19:00:50,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:00:50,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:00:50,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:00:50,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:00:50,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,186 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:00:50,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:00:50,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:00:50,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:00:50,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (1/1) ... [2022-11-20 19:00:50,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:00:50,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:00:50,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:00:50,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:00:50,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:00:50,267 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-20 19:00:50,267 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-20 19:00:50,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 19:00:50,268 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-20 19:00:50,268 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-20 19:00:50,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:00:50,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:00:50,333 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:00:50,335 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:00:57,600 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:00:57,605 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:00:57,606 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 19:00:57,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:00:57 BoogieIcfgContainer [2022-11-20 19:00:57,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:00:57,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:00:57,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:00:57,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:00:57,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:00:49" (1/3) ... [2022-11-20 19:00:57,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70fb7f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:00:57, skipping insertion in model container [2022-11-20 19:00:57,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:50" (2/3) ... [2022-11-20 19:00:57,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70fb7f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:00:57, skipping insertion in model container [2022-11-20 19:00:57,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:00:57" (3/3) ... [2022-11-20 19:00:57,618 INFO L112 eAbstractionObserver]: Analyzing ICFG newton_2_4.i [2022-11-20 19:00:57,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:00:57,639 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:00:57,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:00:57,722 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@498a2bde, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:00:57,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:00:57,727 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) [2022-11-20 19:00:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 19:00:57,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:57,737 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:57,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:00:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:57,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1905727787, now seen corresponding path program 1 times [2022-11-20 19:00:57,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:57,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664087436] [2022-11-20 19:00:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:57,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:57,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:57,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 19:01:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:00,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 19:01:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:01:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:01:00,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:01:00,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:01:00,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664087436] [2022-11-20 19:01:00,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664087436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:01:00,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:01:00,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:01:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737653442] [2022-11-20 19:01:00,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:01:00,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 19:01:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:01:00,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 19:01:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:01:00,439 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 19:01:00,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:01:00,457 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-20 19:01:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 19:01:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2022-11-20 19:01:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:01:00,466 INFO L225 Difference]: With dead ends: 43 [2022-11-20 19:01:00,467 INFO L226 Difference]: Without dead ends: 19 [2022-11-20 19:01:00,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:01:00,473 INFO L413 NwaCegarLoop]: 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 [2022-11-20 19:01:00,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:01:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-20 19:01:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-20 19:01:00,514 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) [2022-11-20 19:01:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-20 19:01:00,519 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 24 [2022-11-20 19:01:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:01:00,519 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-20 19:01:00,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 19:01:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-20 19:01:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 19:01:00,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:01:00,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:01:00,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-20 19:01:00,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:01:00,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:01:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:01:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2124582505, now seen corresponding path program 1 times [2022-11-20 19:01:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:01:00,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417584018] [2022-11-20 19:01:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:00,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:01:00,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:01:00,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:01:00,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6099618-dc5b-48ab-8131-4641edf7dea0/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process