./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_biNewton_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_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c -s /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/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 71d15b3186fc16a974d38e1f9340cf7de3285c68 .................................................................................................................................................................................................................................................................... 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_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c -s /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/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 71d15b3186fc16a974d38e1f9340cf7de3285c68 ............................................................................................................................................................................................................................................................................................................................................................................................... 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 17:04:59,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:04:59,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:04:59,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:04:59,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:04:59,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:04:59,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:04:59,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:04:59,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:04:59,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:04:59,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:04:59,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:04:59,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:04:59,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:04:59,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:04:59,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:04:59,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:04:59,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:04:59,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:04:59,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:04:59,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:04:59,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:04:59,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:04:59,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:04:59,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:04:59,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:04:59,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:04:59,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:04:59,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:04:59,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:04:59,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:04:59,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:04:59,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:04:59,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:04:59,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:04:59,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:04:59,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:04:59,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:04:59,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:04:59,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:04:59,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:04:59,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 17:04:59,876 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:04:59,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:04:59,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:04:59,877 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:04:59,878 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:04:59,878 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:04:59,878 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:04:59,878 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:04:59,878 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:04:59,878 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:04:59,879 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:04:59,879 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:04:59,879 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:04:59,879 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:04:59,879 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:04:59,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:04:59,880 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:04:59,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:04:59,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:04:59,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:04:59,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:04:59,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:04:59,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:04:59,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:04:59,881 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:04:59,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:04:59,882 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:04:59,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:04:59,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:04:59,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:04:59,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:04:59,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:04:59,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:04:59,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:04:59,883 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:04:59,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:04:59,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:04:59,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:04:59,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:04:59,884 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_416ae46a-5656-4f95-a46c-eda085f52e2b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71d15b3186fc16a974d38e1f9340cf7de3285c68 [2020-12-09 17:05:00,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:05:00,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:05:00,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:05:00,084 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:05:00,085 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:05:00,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c [2020-12-09 17:05:00,129 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/data/1255ebd0a/0df465be5307428bac192e059d7a1cb4/FLAG6b4d16aca [2020-12-09 17:05:00,524 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:05:00,524 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c [2020-12-09 17:05:00,529 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/data/1255ebd0a/0df465be5307428bac192e059d7a1cb4/FLAG6b4d16aca [2020-12-09 17:05:00,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/data/1255ebd0a/0df465be5307428bac192e059d7a1cb4 [2020-12-09 17:05:00,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:05:00,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:05:00,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:05:00,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:05:00,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:05:00,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1342b9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00, skipping insertion in model container [2020-12-09 17:05:00,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:05:00,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:05:00,673 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_416ae46a-5656-4f95-a46c-eda085f52e2b/sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c[570,583] [2020-12-09 17:05:00,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:05:00,696 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:05:00,704 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_416ae46a-5656-4f95-a46c-eda085f52e2b/sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c[570,583] [2020-12-09 17:05:00,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:05:00,722 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:05:00,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00 WrapperNode [2020-12-09 17:05:00,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:05:00,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:05:00,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:05:00,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:05:00,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:05:00,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:05:00,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:05:00,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:05:00,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (1/1) ... [2020-12-09 17:05:00,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:05:00,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:05:00,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:05:00,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:05:00,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/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 17:05:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:05:00,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:05:00,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:05:00,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:05:01,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:05:01,110 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-09 17:05:01,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:05:01 BoogieIcfgContainer [2020-12-09 17:05:01,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:05:01,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:05:01,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:05:01,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:05:01,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:05:00" (1/3) ... [2020-12-09 17:05:01,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dbf67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:05:01, skipping insertion in model container [2020-12-09 17:05:01,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:00" (2/3) ... [2020-12-09 17:05:01,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dbf67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:05:01, skipping insertion in model container [2020-12-09 17:05:01,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:05:01" (3/3) ... [2020-12-09 17:05:01,120 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_biNewton_pseudoconstant.c [2020-12-09 17:05:01,133 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:05:01,136 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 17:05:01,147 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 17:05:01,170 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:05:01,170 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:05:01,170 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:05:01,170 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:05:01,170 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:05:01,171 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:05:01,171 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:05:01,171 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:05:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2020-12-09 17:05:01,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:05:01,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:05:01,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 17:05:01,184 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:05:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:05:01,189 INFO L82 PathProgramCache]: Analyzing trace with hash 85265110, now seen corresponding path program 1 times [2020-12-09 17:05:01,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:05:01,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897744426] [2020-12-09 17:05:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:05:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:05:01,285 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:05:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:05:01,310 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:05:01,329 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 17:05:01,329 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:05:01,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:05:01,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:05:01 BoogieIcfgContainer [2020-12-09 17:05:01,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:05:01,350 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:05:01,350 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:05:01,350 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:05:01,350 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:05:01" (3/4) ... [2020-12-09 17:05:01,353 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 17:05:01,353 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:05:01,356 INFO L168 Benchmark]: Toolchain (without parser) took 813.52 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 56.2 MB in the beginning and 53.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:05:01,356 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 86.0 MB. Free memory was 45.2 MB in the beginning and 45.1 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:05:01,358 INFO L168 Benchmark]: CACSL2BoogieTranslator took 180.72 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 56.2 MB in the beginning and 91.7 MB in the end (delta: -35.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:05:01,358 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.15 ms. Allocated memory is still 115.3 MB. Free memory was 91.7 MB in the beginning and 90.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:05:01,359 INFO L168 Benchmark]: Boogie Preprocessor took 17.13 ms. Allocated memory is still 115.3 MB. Free memory was 90.5 MB in the beginning and 89.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:05:01,360 INFO L168 Benchmark]: RCFGBuilder took 345.75 ms. Allocated memory is still 115.3 MB. Free memory was 89.0 MB in the beginning and 67.4 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 17:05:01,361 INFO L168 Benchmark]: TraceAbstraction took 235.24 ms. Allocated memory is still 115.3 MB. Free memory was 66.6 MB in the beginning and 54.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:05:01,361 INFO L168 Benchmark]: Witness Printer took 3.85 ms. Allocated memory is still 115.3 MB. Free memory was 54.0 MB in the beginning and 53.4 MB in the end (delta: 606.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:05:01,365 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 86.0 MB. Free memory was 45.2 MB in the beginning and 45.1 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 180.72 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 56.2 MB in the beginning and 91.7 MB in the end (delta: -35.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.15 ms. Allocated memory is still 115.3 MB. Free memory was 91.7 MB in the beginning and 90.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.13 ms. Allocated memory is still 115.3 MB. Free memory was 90.5 MB in the beginning and 89.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 345.75 ms. Allocated memory is still 115.3 MB. Free memory was 89.0 MB in the beginning and 67.4 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 235.24 ms. Allocated memory is still 115.3 MB. Free memory was 66.6 MB in the beginning and 54.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.85 ms. Allocated memory is still 115.3 MB. Free memory was 54.0 MB in the beginning and 53.4 MB in the end (delta: 606.1 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: overapproximation of someBinaryArithmeticDOUBLEoperation at line 38, overapproximation of someUnaryDOUBLEoperation at line 25, overapproximation of someBinaryDOUBLEComparisonOperation at line 53. Possible FailurePath: [L15] double _EPS = 1e-6; [L43] double d, dd, r; [L44] double epsilon = 1e-8; [L46] d = 1. VAL [_EPS=1/1000000] [L46] COND TRUE d <= 20. [L48] 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 VAL [_EPS=1/1000000] [L28] COND FALSE !(\read(cond)) [L38] return 1.0 / xnp1; [L51] 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 17:05:02,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:05:03,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:05:03,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:05:03,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:05:03,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:05:03,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:05:03,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:05:03,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:05:03,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:05:03,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:05:03,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:05:03,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:05:03,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:05:03,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:05:03,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:05:03,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:05:03,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:05:03,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:05:03,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:05:03,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:05:03,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:05:03,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:05:03,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:05:03,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:05:03,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:05:03,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:05:03,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:05:03,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:05:03,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:05:03,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:05:03,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:05:03,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:05:03,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:05:03,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:05:03,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:05:03,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:05:03,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:05:03,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:05:03,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:05:03,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:05:03,066 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 17:05:03,084 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:05:03,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:05:03,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:05:03,085 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:05:03,085 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:05:03,085 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:05:03,086 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:05:03,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:05:03,086 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:05:03,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:05:03,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:05:03,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:05:03,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:05:03,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:05:03,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:05:03,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:05:03,087 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:05:03,087 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 17:05:03,087 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 17:05:03,087 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:05:03,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:05:03,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:05:03,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:05:03,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:05:03,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 17:05:03,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:05:03,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:05:03,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:05:03,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:05:03,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:05:03,089 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 17:05:03,089 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 17:05:03,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:05:03,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:05:03,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:05:03,089 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_416ae46a-5656-4f95-a46c-eda085f52e2b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71d15b3186fc16a974d38e1f9340cf7de3285c68 [2020-12-09 17:05:03,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:05:03,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:05:03,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:05:03,353 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:05:03,353 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:05:03,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c [2020-12-09 17:05:03,394 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/data/8f913f8b0/48057e87a7b14bb4846832c79e7fbb41/FLAGf54696284 [2020-12-09 17:05:03,768 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:05:03,769 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c [2020-12-09 17:05:03,776 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/data/8f913f8b0/48057e87a7b14bb4846832c79e7fbb41/FLAGf54696284 [2020-12-09 17:05:03,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/data/8f913f8b0/48057e87a7b14bb4846832c79e7fbb41 [2020-12-09 17:05:03,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:05:03,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:05:03,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:05:03,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:05:03,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:05:03,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:03,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3017a2a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03, skipping insertion in model container [2020-12-09 17:05:03,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:03,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:05:03,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:05:03,910 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_416ae46a-5656-4f95-a46c-eda085f52e2b/sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c[570,583] [2020-12-09 17:05:03,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:05:03,935 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:05:03,951 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_416ae46a-5656-4f95-a46c-eda085f52e2b/sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c[570,583] [2020-12-09 17:05:03,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:05:03,975 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:05:03,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03 WrapperNode [2020-12-09 17:05:03,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:05:03,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:05:03,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:05:03,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:05:03,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:03,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:04,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:05:04,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:05:04,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:05:04,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:05:04,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:04,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:04,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:04,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:04,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:04,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:04,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (1/1) ... [2020-12-09 17:05:04,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:05:04,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:05:04,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:05:04,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:05:04,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/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 17:05:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 17:05:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:05:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:05:04,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:05:12,743 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:05:12,743 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-09 17:05:12,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:05:12 BoogieIcfgContainer [2020-12-09 17:05:12,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:05:12,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:05:12,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:05:12,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:05:12,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:05:03" (1/3) ... [2020-12-09 17:05:12,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42abf236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:05:12, skipping insertion in model container [2020-12-09 17:05:12,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:05:03" (2/3) ... [2020-12-09 17:05:12,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42abf236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:05:12, skipping insertion in model container [2020-12-09 17:05:12,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:05:12" (3/3) ... [2020-12-09 17:05:12,752 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_biNewton_pseudoconstant.c [2020-12-09 17:05:12,763 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:05:12,766 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 17:05:12,774 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 17:05:12,792 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:05:12,792 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:05:12,792 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:05:12,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:05:12,792 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:05:12,792 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:05:12,792 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:05:12,793 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:05:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 17:05:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 17:05:12,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:05:12,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:05:12,804 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:05:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:05:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1569195288, now seen corresponding path program 1 times [2020-12-09 17:05:12,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:05:12,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852296669] [2020-12-09 17:05:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/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 17:05:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:05:14,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 17:05:14,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:05:14,218 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 17:05:14,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:05:14,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852296669] [2020-12-09 17:05:14,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:05:14,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:05:14,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168452560] [2020-12-09 17:05:14,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 17:05:14,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:05:14,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 17:05:14,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:05:14,240 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-09 17:05:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:05:14,253 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-09 17:05:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 17:05:14,254 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-09 17:05:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:05:14,262 INFO L225 Difference]: With dead ends: 34 [2020-12-09 17:05:14,262 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 17:05:14,265 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 17:05:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 17:05:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 17:05:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 17:05:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-09 17:05:14,293 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2020-12-09 17:05:14,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:05:14,294 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-09 17:05:14,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 17:05:14,294 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-09 17:05:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 17:05:14,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:05:14,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:05:14,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 17:05:14,496 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:05:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:05:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2049407722, now seen corresponding path program 1 times [2020-12-09 17:05:14,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:05:14,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296759765] [2020-12-09 17:05:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/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 17:05:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:05:15,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:05:15,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:05:16,285 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 17:05:16,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 17:05:16,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296759765] [2020-12-09 17:05:16,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:05:16,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:05:16,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773402272] [2020-12-09 17:05:16,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:05:16,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 17:05:16,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:05:16,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:05:16,289 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-09 17:05:22,941 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 17:05:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:05:35,957 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-09 17:05:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:05:35,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 17:05:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:05:35,959 INFO L225 Difference]: With dead ends: 32 [2020-12-09 17:05:35,960 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 17:05:35,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:05:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 17:05:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 17:05:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 17:05:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-09 17:05:35,966 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2020-12-09 17:05:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:05:35,966 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-09 17:05:35,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:05:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-09 17:05:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 17:05:35,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:05:35,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:05:36,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 17:05:36,169 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:05:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:05:36,172 INFO L82 PathProgramCache]: Analyzing trace with hash -274400360, now seen corresponding path program 1 times [2020-12-09 17:05:36,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 17:05:36,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195916844] [2020-12-09 17:05:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/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 17:05:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:05:39,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 17:05:39,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:05:40,153 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 17:05:40,931 WARN L197 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 17:05:41,556 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-09 17:05:42,126 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-09 17:05:44,329 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 17:05:44,359 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 17:05:44,361 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 17:05:47,539 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 17:05:49,774 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 17:05:52,204 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 17:05:54,459 WARN L860 $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 true [2020-12-09 17:05:54,467 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 17:05:56,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 17:06:14,567 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 17:06:26,135 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-09 17:06:26,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195916844] [2020-12-09 17:06:26,136 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 17:06:26,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1196016917] [2020-12-09 17:06:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt [2020-12-09 17:06:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:06:30,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 17:06:30,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:06:30,830 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 17:06:30,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270463735] [2020-12-09 17:06:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_416ae46a-5656-4f95-a46c-eda085f52e2b/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:09:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:09:43,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 17:09:43,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:09:43,700 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 17:09:43,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:09:43,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 17:09:43,701 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-12-09 17:09:43,701 INFO L523 BasicCegarLoop]: Counterexample might be feasible [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2020-12-09 17:09:44,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 cvc4 --incremental --print-success --lang smt [2020-12-09 17:09:44,321 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 17:09:44,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:09:44 BoogieIcfgContainer [2020-12-09 17:09:44,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:09:44,322 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:09:44,322 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:09:44,322 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:09:44,322 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:05:12" (3/4) ... [2020-12-09 17:09:44,324 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 17:09:44,324 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:09:44,325 INFO L168 Benchmark]: Toolchain (without parser) took 280532.61 ms. Allocated memory was 71.3 MB in the beginning and 92.3 MB in the end (delta: 21.0 MB). Free memory was 55.8 MB in the beginning and 64.7 MB in the end (delta: -8.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2020-12-09 17:09:44,326 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 71.3 MB. Free memory is still 53.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:09:44,327 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.39 ms. Allocated memory is still 71.3 MB. Free memory was 55.6 MB in the beginning and 53.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:09:44,327 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.99 ms. Allocated memory is still 71.3 MB. Free memory was 53.5 MB in the beginning and 52.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:09:44,328 INFO L168 Benchmark]: Boogie Preprocessor took 21.67 ms. Allocated memory is still 71.3 MB. Free memory was 52.0 MB in the beginning and 50.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:09:44,328 INFO L168 Benchmark]: RCFGBuilder took 8719.21 ms. Allocated memory is still 71.3 MB. Free memory was 50.4 MB in the beginning and 35.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 17:09:44,329 INFO L168 Benchmark]: TraceAbstraction took 271574.88 ms. Allocated memory was 71.3 MB in the beginning and 92.3 MB in the end (delta: 21.0 MB). Free memory was 35.5 MB in the beginning and 65.4 MB in the end (delta: -29.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:09:44,329 INFO L168 Benchmark]: Witness Printer took 2.77 ms. Allocated memory is still 92.3 MB. Free memory is still 64.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:09:44,333 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 71.3 MB. Free memory is still 53.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 182.39 ms. Allocated memory is still 71.3 MB. Free memory was 55.6 MB in the beginning and 53.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.99 ms. Allocated memory is still 71.3 MB. Free memory was 53.5 MB in the beginning and 52.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.67 ms. Allocated memory is still 71.3 MB. Free memory was 52.0 MB in the beginning and 50.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 8719.21 ms. Allocated memory is still 71.3 MB. Free memory was 50.4 MB in the beginning and 35.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 271574.88 ms. Allocated memory was 71.3 MB in the beginning and 92.3 MB in the end (delta: 21.0 MB). Free memory was 35.5 MB in the beginning and 65.4 MB in the end (delta: -29.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.77 ms. Allocated memory is still 92.3 MB. Free memory is still 64.7 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: unable to decide satisfiability of path constraint. Possible FailurePath: [L15] double _EPS = 1e-6; [L43] double d, dd, r; [L44] double epsilon = 1e-8; [L46] d = 1. [L46] COND TRUE d <= 20. [L48] 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 [L28] COND FALSE !(\read(cond)) [L38] return 1.0 / xnp1; [L51] 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: 271.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 19.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 3 SDslu, 15 SDs, 0 SdLazy, 17 SolverSat, 0 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 18.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 847 SizeOfPredicates, 7 NumberOfNonLiveVariables, 94 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...