./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan --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 a9874b894e580352626d8ebc271850c0b42d4635 ................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan --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 a9874b894e580352626d8ebc271850c0b42d4635 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:39:54,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:39:54,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:39:55,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:39:55,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:39:55,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:39:55,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:39:55,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:39:55,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:39:55,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:39:55,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:39:55,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:39:55,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:39:55,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:39:55,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:39:55,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:39:55,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:39:55,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:39:55,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:39:55,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:39:55,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:39:55,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:39:55,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:39:55,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:39:55,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:39:55,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:39:55,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:39:55,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:39:55,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:39:55,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:39:55,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:39:55,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:39:55,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:39:55,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:39:55,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:39:55,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:39:55,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:39:55,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:39:55,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:39:55,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:39:55,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:39:55,062 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 04:39:55,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:39:55,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:39:55,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:39:55,079 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:39:55,080 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:39:55,080 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:39:55,080 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:39:55,080 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:39:55,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:39:55,080 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:39:55,080 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:39:55,080 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:39:55,081 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:39:55,081 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:39:55,081 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:39:55,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:39:55,081 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:39:55,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:39:55,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:39:55,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:39:55,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:39:55,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:39:55,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:39:55,082 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:39:55,082 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:39:55,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:39:55,083 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:39:55,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:39:55,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:39:55,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:39:55,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:39:55,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:39:55,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:39:55,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:39:55,084 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:39:55,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:39:55,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:39:55,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:39:55,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:39:55,084 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-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9874b894e580352626d8ebc271850c0b42d4635 [2020-12-09 04:39:55,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:39:55,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:39:55,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:39:55,302 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:39:55,303 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:39:55,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c [2020-12-09 04:39:55,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/data/2ecdaf8e4/01b7009e5d21472492bf0bf5343e1536/FLAGa2df29bd9 [2020-12-09 04:39:55,708 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:39:55,708 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c [2020-12-09 04:39:55,713 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/data/2ecdaf8e4/01b7009e5d21472492bf0bf5343e1536/FLAGa2df29bd9 [2020-12-09 04:39:55,722 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/data/2ecdaf8e4/01b7009e5d21472492bf0bf5343e1536 [2020-12-09 04:39:55,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:39:55,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:39:55,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:39:55,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:39:55,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:39:55,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d27bdb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55, skipping insertion in model container [2020-12-09 04:39:55,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:39:55,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:39:55,842 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c[557,570] [2020-12-09 04:39:55,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:39:55,868 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:39:55,880 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c[557,570] [2020-12-09 04:39:55,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:39:55,904 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:39:55,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55 WrapperNode [2020-12-09 04:39:55,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:39:55,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:39:55,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:39:55,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:39:55,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:39:55,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:39:55,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:39:55,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:39:55,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (1/1) ... [2020-12-09 04:39:55,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:39:55,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:39:55,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:39:55,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:39:55,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:39:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 04:39:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:39:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:39:56,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:39:56,290 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:39:56,291 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-09 04:39:56,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:39:56 BoogieIcfgContainer [2020-12-09 04:39:56,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:39:56,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:39:56,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:39:56,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:39:56,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:39:55" (1/3) ... [2020-12-09 04:39:56,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c06b07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:39:56, skipping insertion in model container [2020-12-09 04:39:56,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:55" (2/3) ... [2020-12-09 04:39:56,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c06b07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:39:56, skipping insertion in model container [2020-12-09 04:39:56,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:39:56" (3/3) ... [2020-12-09 04:39:56,302 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Newton_pseudoconstant.c [2020-12-09 04:39:56,323 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:39:56,326 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 04:39:56,334 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 04:39:56,351 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:39:56,351 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:39:56,352 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:39:56,352 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:39:56,352 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:39:56,352 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:39:56,352 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:39:56,352 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:39:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2020-12-09 04:39:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 04:39:56,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:39:56,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 04:39:56,365 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:39:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:39:56,369 INFO L82 PathProgramCache]: Analyzing trace with hash 85265110, now seen corresponding path program 1 times [2020-12-09 04:39:56,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:39:56,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113757833] [2020-12-09 04:39:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:39:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:39:56,460 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:39:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:39:56,480 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:39:56,495 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 04:39:56,496 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:39:56,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 04:39:56,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:39:56 BoogieIcfgContainer [2020-12-09 04:39:56,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:39:56,514 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:39:56,514 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:39:56,515 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:39:56,515 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:39:56" (3/4) ... [2020-12-09 04:39:56,517 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 04:39:56,517 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:39:56,519 INFO L168 Benchmark]: Toolchain (without parser) took 792.59 ms. Allocated memory is still 88.1 MB. Free memory was 59.4 MB in the beginning and 55.4 MB in the end (delta: 4.0 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:39:56,519 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 88.1 MB. Free memory was 65.5 MB in the beginning and 65.5 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:39:56,520 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.12 ms. Allocated memory is still 88.1 MB. Free memory was 59.2 MB in the beginning and 48.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:39:56,521 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.71 ms. Allocated memory is still 88.1 MB. Free memory was 48.8 MB in the beginning and 68.2 MB in the end (delta: -19.4 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-12-09 04:39:56,521 INFO L168 Benchmark]: Boogie Preprocessor took 21.42 ms. Allocated memory is still 88.1 MB. Free memory was 68.2 MB in the beginning and 67.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:39:56,522 INFO L168 Benchmark]: RCFGBuilder took 326.62 ms. Allocated memory is still 88.1 MB. Free memory was 67.1 MB in the beginning and 45.2 MB in the end (delta: 21.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:39:56,523 INFO L168 Benchmark]: TraceAbstraction took 218.66 ms. Allocated memory is still 88.1 MB. Free memory was 45.0 MB in the beginning and 55.8 MB in the end (delta: -10.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:39:56,523 INFO L168 Benchmark]: Witness Printer took 3.00 ms. Allocated memory is still 88.1 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:39:56,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 88.1 MB. Free memory was 65.5 MB in the beginning and 65.5 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 178.12 ms. Allocated memory is still 88.1 MB. Free memory was 59.2 MB in the beginning and 48.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.71 ms. Allocated memory is still 88.1 MB. Free memory was 48.8 MB in the beginning and 68.2 MB in the end (delta: -19.4 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.42 ms. Allocated memory is still 88.1 MB. Free memory was 68.2 MB in the beginning and 67.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 326.62 ms. Allocated memory is still 88.1 MB. Free memory was 67.1 MB in the beginning and 45.2 MB in the end (delta: 21.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 218.66 ms. Allocated memory is still 88.1 MB. Free memory was 45.0 MB in the beginning and 55.8 MB in the end (delta: -10.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.00 ms. Allocated memory is still 88.1 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticDOUBLEoperation at line 37, overapproximation of someUnaryDOUBLEoperation at line 25, overapproximation of someBinaryDOUBLEComparisonOperation at line 52. Possible FailurePath: [L15] double _EPS = 1e-6; [L42] double d, dd, r; [L43] double epsilon = 1e-8; [L45] d = 1. VAL [_EPS=1/1000000] [L45] COND TRUE d <= 20. [L47] dd = __VERIFIER_nondet_double() [L11] COND FALSE !(!cond) [L19] double xn, xnp1, residu, lsup, linf; [L20] int i, cond; [L21] COND FALSE !(Input <= 1.0) [L21] xn = 1.0/Input [L22] xnp1 = xn [L23] residu = 2.0*_EPS*(xn+xnp1) [L24] lsup = _EPS * (xn+xnp1) [L25] linf = -lsup [L26] cond = ((residu > lsup) || (residu < linf)) [L27] i = 0 VAL [_EPS=1/1000000] [L28] COND FALSE !(\read(cond)) [L37] return 1.0 / xnp1; [L50] r = SqrtR(dd) [L13] COND TRUE !(cond) VAL [_EPS=1/1000000] [L13] reach_error() VAL [_EPS=1/1000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=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, 5 NumberOfCodeBlocks, 5 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:39:58,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:39:58,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:39:58,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:39:58,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:39:58,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:39:58,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:39:58,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:39:58,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:39:58,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:39:58,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:39:58,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:39:58,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:39:58,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:39:58,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:39:58,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:39:58,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:39:58,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:39:58,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:39:58,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:39:58,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:39:58,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:39:58,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:39:58,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:39:58,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:39:58,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:39:58,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:39:58,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:39:58,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:39:58,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:39:58,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:39:58,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:39:58,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:39:58,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:39:58,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:39:58,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:39:58,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:39:58,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:39:58,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:39:58,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:39:58,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:39:58,275 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 04:39:58,293 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:39:58,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:39:58,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:39:58,294 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:39:58,294 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:39:58,294 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:39:58,294 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:39:58,294 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:39:58,295 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:39:58,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:39:58,295 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:39:58,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:39:58,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:39:58,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:39:58,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:39:58,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:39:58,296 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:39:58,296 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 04:39:58,296 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 04:39:58,296 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:39:58,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:39:58,296 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:39:58,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:39:58,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:39:58,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 04:39:58,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:39:58,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:39:58,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:39:58,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:39:58,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:39:58,298 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 04:39:58,298 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 04:39:58,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:39:58,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:39:58,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:39:58,298 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-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9874b894e580352626d8ebc271850c0b42d4635 [2020-12-09 04:39:58,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:39:58,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:39:58,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:39:58,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:39:58,567 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:39:58,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c [2020-12-09 04:39:58,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/data/9fe7654ca/306491d045e5489f8c4c011fc2ed0cb4/FLAG7af66daf9 [2020-12-09 04:39:58,996 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:39:58,996 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c [2020-12-09 04:39:59,001 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/data/9fe7654ca/306491d045e5489f8c4c011fc2ed0cb4/FLAG7af66daf9 [2020-12-09 04:39:59,011 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/data/9fe7654ca/306491d045e5489f8c4c011fc2ed0cb4 [2020-12-09 04:39:59,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:39:59,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:39:59,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:39:59,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:39:59,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:39:59,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a101874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59, skipping insertion in model container [2020-12-09 04:39:59,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:39:59,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:39:59,129 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c[557,570] [2020-12-09 04:39:59,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:39:59,152 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:39:59,168 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c[557,570] [2020-12-09 04:39:59,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:39:59,195 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:39:59,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59 WrapperNode [2020-12-09 04:39:59,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:39:59,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:39:59,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:39:59,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:39:59,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:39:59,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:39:59,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:39:59,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:39:59,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (1/1) ... [2020-12-09 04:39:59,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:39:59,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:39:59,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:39:59,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:39:59,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:39:59,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 04:39:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:39:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:39:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:40:08,893 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:40:08,893 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-09 04:40:08,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:40:08 BoogieIcfgContainer [2020-12-09 04:40:08,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:40:08,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:40:08,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:40:08,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:40:08,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:39:59" (1/3) ... [2020-12-09 04:40:08,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da60422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:40:08, skipping insertion in model container [2020-12-09 04:40:08,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:39:59" (2/3) ... [2020-12-09 04:40:08,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da60422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:40:08, skipping insertion in model container [2020-12-09 04:40:08,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:40:08" (3/3) ... [2020-12-09 04:40:08,902 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Newton_pseudoconstant.c [2020-12-09 04:40:08,914 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:40:08,916 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 04:40:08,925 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 04:40:08,944 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:40:08,945 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:40:08,945 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:40:08,945 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:40:08,945 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:40:08,945 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:40:08,945 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:40:08,945 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:40:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 04:40:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 04:40:08,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:08,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:08,958 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:40:08,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:08,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1569195288, now seen corresponding path program 1 times [2020-12-09 04:40:08,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:08,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697411575] [2020-12-09 04:40:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 04:40:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:10,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 04:40:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:10,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:40:10,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697411575] [2020-12-09 04:40:10,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:40:10,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:40:10,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765620167] [2020-12-09 04:40:10,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 04:40:10,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:10,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 04:40:10,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 04:40:10,429 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-09 04:40:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:10,441 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-09 04:40:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 04:40:10,442 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-09 04:40:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:10,449 INFO L225 Difference]: With dead ends: 34 [2020-12-09 04:40:10,450 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 04:40:10,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 04:40:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 04:40:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 04:40:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 04:40:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-09 04:40:10,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2020-12-09 04:40:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:10,475 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-09 04:40:10,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 04:40:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-09 04:40:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 04:40:10,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:10,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:10,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 04:40:10,677 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:40:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:10,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2049407722, now seen corresponding path program 1 times [2020-12-09 04:40:10,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:10,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454262276] [2020-12-09 04:40:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 04:40:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:12,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 04:40:12,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:40:12,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:40:12,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454262276] [2020-12-09 04:40:12,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:40:12,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:40:12,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337053915] [2020-12-09 04:40:12,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 04:40:12,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:40:12,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 04:40:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:40:12,393 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-09 04:40:24,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:40:24,958 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-09 04:40:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:40:24,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 04:40:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:40:24,961 INFO L225 Difference]: With dead ends: 32 [2020-12-09 04:40:24,961 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 04:40:24,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:40:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 04:40:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 04:40:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 04:40:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-09 04:40:24,966 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2020-12-09 04:40:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:40:24,966 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-09 04:40:24,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 04:40:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-09 04:40:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 04:40:24,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:40:24,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:40:25,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 04:40:25,169 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:40:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:40:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash -274400360, now seen corresponding path program 1 times [2020-12-09 04:40:25,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:40:25,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935668820] [2020-12-09 04:40:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 04:40:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:40:28,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 04:40:28,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:40:29,202 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 04:40:29,870 WARN L197 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 04:40:30,432 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-09 04:40:30,888 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-09 04:40:33,103 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0))) (.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= c_ULTIMATE.start_SqrtR_~xn~0 (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input)) (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse0 .cse1)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse0 .cse1)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0))))) (= c_currentRoundingMode roundNearestTiesToEven) (= c_~_EPS~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)))) is different from false [2020-12-09 04:40:33,126 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 04:40:33,128 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 04:40:36,350 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_currentRoundingMode roundNearestTiesToEven)) (.cse6 (= (_ bv1 32) c_ULTIMATE.start_SqrtR_~cond~0))) (or (and .cse0 (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0))) (.cse5 (fp.div c_currentRoundingMode .cse1 ULTIMATE.start_SqrtR_~Input))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse1 .cse2)) (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse4 (fp.add c_currentRoundingMode .cse5 c_ULTIMATE.start_SqrtR_~xnp1~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse3) .cse4) (fp.mul c_currentRoundingMode .cse3 .cse4))) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse1 .cse2)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse1)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 .cse5))))) .cse6) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse10 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse12 (fp.div c_currentRoundingMode .cse10 ULTIMATE.start_SqrtR_~Input))) (let ((.cse8 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse9 (fp.add c_currentRoundingMode .cse12 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse7 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse8) .cse9)) (.cse11 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (and (not (fp.gt .cse7 (fp.mul c_currentRoundingMode .cse8 .cse9))) (not (fp.lt .cse7 v_prenex_1)) (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse10 .cse11)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse10 .cse11)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse10)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 .cse12))))))) .cse0 (= (_ bv0 32) c_ULTIMATE.start_SqrtR_~cond~0)) (and .cse0 (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (ULTIMATE.start_SqrtR_~linf~0 (_ FloatingPoint 11 53))) (let ((.cse14 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse15 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0))) (.cse13 (fp.div c_currentRoundingMode .cse14 ULTIMATE.start_SqrtR_~Input))) (and (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (fp.add c_currentRoundingMode .cse13 c_ULTIMATE.start_SqrtR_~xnp1~0)) ULTIMATE.start_SqrtR_~linf~0) (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse14 .cse15)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse14 .cse15)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse14)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 .cse13))))) .cse6))) is different from false [2020-12-09 04:40:38,594 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.div c_currentRoundingMode .cse3 ULTIMATE.start_SqrtR_~Input))) (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse2 (fp.add c_currentRoundingMode .cse5 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse0 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse1) .cse2)) (.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (and (not (fp.gt .cse0 (fp.mul c_currentRoundingMode .cse1 .cse2))) (not (fp.lt .cse0 v_prenex_1)) (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse3 .cse4)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse3)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 .cse5))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2020-12-09 04:40:41,001 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input))) (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse5 (fp.add c_currentRoundingMode .cse1 .cse1))) (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0))) (.cse3 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5))) (and (= |c_ULTIMATE.start_SqrtR_#res| (fp.div c_currentRoundingMode .cse0 .cse1)) (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse0 .cse2)) (not (fp.lt .cse3 v_prenex_1)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse0 .cse2)) (not (fp.gt .cse3 (fp.mul c_currentRoundingMode .cse4 .cse5))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2020-12-09 04:40:41,031 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 04:40:43,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 04:41:01,075 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))) (or (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse3 (fp.div roundNearestTiesToEven .cse0 ULTIMATE.start_SqrtR_~Input))) (let ((.cse4 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse5 (fp.add roundNearestTiesToEven .cse3 .cse3))) (let ((.cse2 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse4) .cse5)) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 100000000.0)))) (and (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub roundNearestTiesToEven .cse0 .cse1)) (not (fp.lt .cse2 v_prenex_1)) (not (fp.geq (fp.div roundNearestTiesToEven .cse0 .cse3) ((_ to_fp 11 53) roundNearestTiesToEven (/ 9.0 10.0)))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (not (fp.gt .cse2 (fp.mul roundNearestTiesToEven .cse4 .cse5))) (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add roundNearestTiesToEven .cse0 .cse1)))))))) .cse6) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse7 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse12 (fp.div roundNearestTiesToEven .cse7 ULTIMATE.start_SqrtR_~Input))) (let ((.cse10 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse11 (fp.add roundNearestTiesToEven .cse12 .cse12))) (let ((.cse9 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse10) .cse11)) (.cse8 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 100000000.0)))) (and (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub roundNearestTiesToEven .cse7 .cse8)) (not (fp.lt .cse9 v_prenex_1)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse7)) (not (fp.gt .cse9 (fp.mul roundNearestTiesToEven .cse10 .cse11))) (not (fp.leq (fp.div roundNearestTiesToEven .cse7 .cse12) ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add roundNearestTiesToEven .cse7 .cse8)))))))) .cse6) (and (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse13 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse19 (fp.div roundNearestTiesToEven .cse13 ULTIMATE.start_SqrtR_~Input))) (let ((.cse17 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse18 (fp.add roundNearestTiesToEven .cse19 .cse19))) (let ((.cse16 (fp.div roundNearestTiesToEven .cse13 .cse19)) (.cse15 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse17) .cse18)) (.cse14 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 100000000.0)))) (and (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub roundNearestTiesToEven .cse13 .cse14)) (not (fp.lt .cse15 v_prenex_1)) (fp.geq .cse16 ((_ to_fp 11 53) roundNearestTiesToEven (/ 9.0 10.0))) (fp.leq .cse16 ((_ to_fp 11 53) roundNearestTiesToEven 5.0)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse13)) (not (fp.gt .cse15 (fp.mul roundNearestTiesToEven .cse17 .cse18))) (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add roundNearestTiesToEven .cse13 .cse14))))))))))) is different from false [2020-12-09 04:41:14,027 WARN L838 $PredicateComparison]: unable to prove that (or (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse5 (fp.div roundNearestTiesToEven .cse0 ULTIMATE.start_SqrtR_~Input))) (let ((.cse3 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse4 (fp.add roundNearestTiesToEven .cse5 .cse5))) (let ((.cse2 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse3) .cse4)) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 100000000.0)))) (and (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub roundNearestTiesToEven .cse0 .cse1)) (not (fp.lt .cse2 v_prenex_1)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (not (fp.gt .cse2 (fp.mul roundNearestTiesToEven .cse3 .cse4))) (not (fp.leq (fp.div roundNearestTiesToEven .cse0 .cse5) ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add roundNearestTiesToEven .cse0 .cse1)))))))) (exists ((v_prenex_3 (_ FloatingPoint 11 53)) (v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse8 (fp.div roundNearestTiesToEven .cse6 v_prenex_2))) (let ((.cse10 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse11 (fp.add roundNearestTiesToEven .cse8 .cse8))) (let ((.cse7 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 100000000.0))) (.cse9 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse10) .cse11))) (and (fp.leq v_prenex_2 (fp.add roundNearestTiesToEven .cse6 .cse7)) (not (fp.geq (fp.div roundNearestTiesToEven .cse6 .cse8) ((_ to_fp 11 53) roundNearestTiesToEven (/ 9.0 10.0)))) (not (fp.leq v_prenex_2 .cse6)) (not (fp.gt .cse9 (fp.mul roundNearestTiesToEven .cse10 .cse11))) (fp.geq v_prenex_2 (fp.sub roundNearestTiesToEven .cse6 .cse7)) (not (fp.lt .cse9 v_prenex_3))))))))) is different from false [2020-12-09 04:41:16,301 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse5 (fp.div roundNearestTiesToEven .cse0 ULTIMATE.start_SqrtR_~Input))) (let ((.cse3 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse4 (fp.add roundNearestTiesToEven .cse5 .cse5))) (let ((.cse2 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse3) .cse4)) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 100000000.0)))) (and (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub roundNearestTiesToEven .cse0 .cse1)) (not (fp.lt .cse2 v_prenex_1)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (not (fp.gt .cse2 (fp.mul roundNearestTiesToEven .cse3 .cse4))) (not (fp.leq (fp.div roundNearestTiesToEven .cse0 .cse5) ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add roundNearestTiesToEven .cse0 .cse1)))))))) (exists ((v_prenex_3 (_ FloatingPoint 11 53)) (v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse8 (fp.div roundNearestTiesToEven .cse6 v_prenex_2))) (let ((.cse10 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse11 (fp.add roundNearestTiesToEven .cse8 .cse8))) (let ((.cse7 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 100000000.0))) (.cse9 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse10) .cse11))) (and (fp.leq v_prenex_2 (fp.add roundNearestTiesToEven .cse6 .cse7)) (not (fp.geq (fp.div roundNearestTiesToEven .cse6 .cse8) ((_ to_fp 11 53) roundNearestTiesToEven (/ 9.0 10.0)))) (not (fp.leq v_prenex_2 .cse6)) (not (fp.gt .cse9 (fp.mul roundNearestTiesToEven .cse10 .cse11))) (fp.geq v_prenex_2 (fp.sub roundNearestTiesToEven .cse6 .cse7)) (not (fp.lt .cse9 v_prenex_3))))))))) is different from true [2020-12-09 04:41:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:41:16,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:41:16,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935668820] [2020-12-09 04:41:16,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:41:16,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-09 04:41:16,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721284981] [2020-12-09 04:41:16,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 04:41:16,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:41:16,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 04:41:16,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=32, Unknown=7, NotChecked=90, Total=156 [2020-12-09 04:41:16,308 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 13 states. [2020-12-09 04:41:25,332 WARN L197 SmtUtils]: Spent 7.14 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 04:41:38,330 WARN L197 SmtUtils]: Spent 12.37 s on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-12-09 04:41:57,676 WARN L197 SmtUtils]: Spent 19.16 s on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-12-09 04:42:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:42:33,343 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-09 04:42:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 04:42:33,432 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-09 04:42:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:42:33,434 INFO L225 Difference]: With dead ends: 27 [2020-12-09 04:42:33,434 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 04:42:33,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=48, Invalid=59, Unknown=7, NotChecked=126, Total=240 [2020-12-09 04:42:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 04:42:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-09 04:42:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 04:42:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-09 04:42:33,440 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 12 [2020-12-09 04:42:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:42:33,441 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-09 04:42:33,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 04:42:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-09 04:42:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 04:42:33,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:42:33,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:42:33,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 04:42:33,644 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:42:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:42:33,644 INFO L82 PathProgramCache]: Analyzing trace with hash 944524751, now seen corresponding path program 1 times [2020-12-09 04:42:33,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:42:33,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319484375] [2020-12-09 04:42:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 04:42:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:42:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-09 04:42:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:42:41,279 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-12-09 04:42:41,634 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 04:42:42,935 WARN L197 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 04:42:43,785 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-09 04:42:44,567 WARN L197 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-09 04:42:45,976 WARN L197 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-12-09 04:42:48,119 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) (fp.sub c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) (.cse6 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0)))) (let ((.cse3 (= (_ bv1 32) c_ULTIMATE.start_SqrtR_~cond~0)) (.cse0 (fp.gt .cse5 .cse6)) (.cse1 (= c_currentRoundingMode roundNearestTiesToEven)) (.cse2 (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse7 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.add c_currentRoundingMode .cse7 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode .cse7 (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ULTIMATE.start_SqrtR_~Input .cse7) .cse7))) ((_ to_fp 11 53) c_currentRoundingMode 2.0)))) (fp.leq ULTIMATE.start_SqrtR_~Input .cse7) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse7 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))))))) (.cse4 (fp.lt .cse5 (fp.neg .cse6)))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse1 .cse2 .cse3) (and (not .cse0) .cse1 .cse2 (not .cse4) (= (_ bv0 32) c_ULTIMATE.start_SqrtR_~cond~0))))) is different from false [2020-12-09 04:42:50,174 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) (fp.sub c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) (.cse6 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0)))) (let ((.cse3 (= (_ bv1 32) c_ULTIMATE.start_SqrtR_~cond~0)) (.cse0 (fp.gt .cse5 .cse6)) (.cse1 (= c_currentRoundingMode roundNearestTiesToEven)) (.cse2 (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse7 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.add c_currentRoundingMode .cse7 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode .cse7 (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ULTIMATE.start_SqrtR_~Input .cse7) .cse7))) ((_ to_fp 11 53) c_currentRoundingMode 2.0)))) (fp.leq ULTIMATE.start_SqrtR_~Input .cse7) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse7 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))))))) (.cse4 (fp.lt .cse5 (fp.neg .cse6)))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse1 .cse2 .cse3) (and (not .cse0) .cse1 .cse2 (not .cse4) (= (_ bv0 32) c_ULTIMATE.start_SqrtR_~cond~0))))) is different from true [2020-12-09 04:42:52,305 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) (fp.sub c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) (.cse1 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0)))) (and (not (fp.gt .cse0 .cse1)) (= c_currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.add c_currentRoundingMode .cse2 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode .cse2 (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ULTIMATE.start_SqrtR_~Input .cse2) .cse2))) ((_ to_fp 11 53) c_currentRoundingMode 2.0)))) (fp.leq ULTIMATE.start_SqrtR_~Input .cse2) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0))))))) (not (fp.lt .cse0 (fp.neg .cse1))))) is different from false [2020-12-09 04:42:54,362 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) (fp.sub c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) (.cse1 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0)))) (and (not (fp.gt .cse0 .cse1)) (= c_currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.add c_currentRoundingMode .cse2 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode .cse2 (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ULTIMATE.start_SqrtR_~Input .cse2) .cse2))) ((_ to_fp 11 53) c_currentRoundingMode 2.0)))) (fp.leq ULTIMATE.start_SqrtR_~Input .cse2) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0))))))) (not (fp.lt .cse0 (fp.neg .cse1))))) is different from true [2020-12-09 04:42:56,681 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)) (.cse4 ((_ to_fp 11 53) c_currentRoundingMode 2.0))) (let ((.cse1 (fp.add c_currentRoundingMode .cse0 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ULTIMATE.start_SqrtR_~Input .cse0) .cse0))) .cse4)))) (let ((.cse2 (fp.mul c_currentRoundingMode .cse4 (fp.sub c_currentRoundingMode .cse1 .cse0))) (.cse3 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)) (fp.add c_currentRoundingMode .cse1 .cse1)))) (and (= |c_ULTIMATE.start_SqrtR_#res| (fp.div c_currentRoundingMode .cse0 .cse1)) (fp.leq ULTIMATE.start_SqrtR_~Input .cse0) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (not (fp.gt .cse2 .cse3)) (not (fp.lt .cse2 (fp.neg .cse3))))))))) is different from false [2020-12-09 04:42:56,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 04:42:57,408 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-09 04:42:57,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319484375] [2020-12-09 04:42:57,410 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-12-09 04:42:57,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1776306330] [2020-12-09 04:42:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:43:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:43:07,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 04:43:07,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:43:07,229 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken [2020-12-09 04:43:07,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710530906] [2020-12-09 04:43:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b95885b9-d473-44a4-8fb4-5c5f6f679284/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:50:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:50:04,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 04:50:04,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:50:04,909 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken [2020-12-09 04:50:04,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:50:04,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 04:50:04,909 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-12-09 04:50:04,909 INFO L523 BasicCegarLoop]: Counterexample might be feasible [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forcibly destroying the process [2020-12-09 04:50:05,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:50:05,529 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 04:50:05,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:50:05 BoogieIcfgContainer [2020-12-09 04:50:05,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:50:05,530 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:50:05,530 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:50:05,530 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:50:05,531 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:40:08" (3/4) ... [2020-12-09 04:50:05,533 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 04:50:05,533 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:50:05,534 INFO L168 Benchmark]: Toolchain (without parser) took 606519.65 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 38.3 MB in the beginning and 45.2 MB in the end (delta: -6.9 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:05,535 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:50:05,536 INFO L168 Benchmark]: CACSL2BoogieTranslator took 180.64 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 41.7 MB in the end (delta: -3.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:05,537 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.85 ms. Allocated memory is still 58.7 MB. Free memory was 41.7 MB in the beginning and 39.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:50:05,537 INFO L168 Benchmark]: Boogie Preprocessor took 21.58 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 38.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:05,538 INFO L168 Benchmark]: RCFGBuilder took 9641.14 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 38.6 MB in the beginning and 54.2 MB in the end (delta: -15.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:05,539 INFO L168 Benchmark]: TraceAbstraction took 596633.00 ms. Allocated memory is still 73.4 MB. Free memory was 53.7 MB in the beginning and 45.8 MB in the end (delta: 7.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:05,539 INFO L168 Benchmark]: Witness Printer took 3.44 ms. Allocated memory is still 73.4 MB. Free memory was 45.8 MB in the beginning and 45.2 MB in the end (delta: 593.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:50:05,543 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 180.64 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 41.7 MB in the end (delta: -3.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.85 ms. Allocated memory is still 58.7 MB. Free memory was 41.7 MB in the beginning and 39.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.58 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 38.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 9641.14 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 38.6 MB in the beginning and 54.2 MB in the end (delta: -15.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 596633.00 ms. Allocated memory is still 73.4 MB. Free memory was 53.7 MB in the beginning and 45.8 MB in the end (delta: 7.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.44 ms. Allocated memory is still 73.4 MB. Free memory was 45.8 MB in the beginning and 45.2 MB in the end (delta: 593.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L15] double _EPS = 1e-6; [L42] double d, dd, r; [L43] double epsilon = 1e-8; [L45] d = 1. [L45] COND TRUE d <= 20. [L47] dd = __VERIFIER_nondet_double() [L11] COND FALSE !(!cond) [L19] double xn, xnp1, residu, lsup, linf; [L20] int i, cond; [L21] COND TRUE Input <= 1.0 [L21] xn = 1.0 [L22] xnp1 = xn [L23] residu = 2.0*_EPS*(xn+xnp1) [L24] lsup = _EPS * (xn+xnp1) [L25] linf = -lsup [L26] cond = ((residu > lsup) || (residu < linf)) [L27] i = 0 [L28] COND TRUE \read(cond) [L29] xnp1 = xn + xn*(1-Input*xn*xn) / 2.0 [L30] residu = 2.0*(xnp1-xn) [L31] xn = xnp1 [L32] lsup = _EPS * (xn+xnp1) [L33] linf = -lsup [L34] cond = ((residu > lsup) || (residu < linf)) [L35] i++ [L28] COND FALSE !(\read(cond)) [L37] return 1.0 / xnp1; [L50] r = SqrtR(dd) [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 596.5s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 89.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 14 SDslu, 56 SDs, 0 SdLazy, 37 SolverSat, 0 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 48.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 6.2s SatisfiabilityAnalysisTime, 47.9s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 33 ConstructedInterpolants, 6 QuantifiedInterpolants, 14685 SizeOfPredicates, 26 NumberOfNonLiveVariables, 141 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...