./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ac23ee9420d5573e041ab9b716895f5d3bb685f ....................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ac23ee9420d5573e041ab9b716895f5d3bb685f ............................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 13:38:01,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:38:01,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:38:01,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:38:01,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:38:01,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:38:01,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:38:01,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:38:01,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:38:01,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:38:01,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:38:01,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:38:01,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:38:01,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:38:01,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:38:01,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:38:01,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:38:01,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:38:01,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:38:01,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:38:01,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:38:01,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:38:01,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:38:01,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:38:01,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:38:01,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:38:01,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:38:01,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:38:01,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:38:01,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:38:01,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:38:01,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:38:01,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:38:01,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:38:01,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:38:01,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:38:01,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:38:01,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:38:01,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:38:01,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:38:01,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:38:01,152 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 13:38:01,161 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:38:01,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:38:01,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 13:38:01,162 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 13:38:01,162 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 13:38:01,162 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 13:38:01,162 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 13:38:01,162 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 13:38:01,162 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 13:38:01,163 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 13:38:01,163 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 13:38:01,163 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 13:38:01,163 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 13:38:01,163 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 13:38:01,163 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 13:38:01,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:38:01,164 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:38:01,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:38:01,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:38:01,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:38:01,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:38:01,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:38:01,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:38:01,165 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:38:01,165 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:38:01,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:38:01,165 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:38:01,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:38:01,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:38:01,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:38:01,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:38:01,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:38:01,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:38:01,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:38:01,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:38:01,166 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 13:38:01,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:38:01,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:38:01,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:38:01,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 13:38:01,167 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5453c685-d9c9-4192-a937-9e8c88c32776/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(__VERIFIER_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 -> 3ac23ee9420d5573e041ab9b716895f5d3bb685f [2019-12-07 13:38:01,269 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:38:01,276 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:38:01,279 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:38:01,280 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:38:01,280 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:38:01,280 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c [2019-12-07 13:38:01,318 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/data/24018d151/cb89887d2668430ea97337bf1a7cf309/FLAG8b7ec82f8 [2019-12-07 13:38:01,761 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:38:01,761 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c [2019-12-07 13:38:01,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/data/24018d151/cb89887d2668430ea97337bf1a7cf309/FLAG8b7ec82f8 [2019-12-07 13:38:01,774 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/data/24018d151/cb89887d2668430ea97337bf1a7cf309 [2019-12-07 13:38:01,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:38:01,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:38:01,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:38:01,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:38:01,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:38:01,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:01,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c78915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01, skipping insertion in model container [2019-12-07 13:38:01,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:01,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:38:01,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:38:01,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:38:01,965 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:38:01,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:38:01,990 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:38:01,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01 WrapperNode [2019-12-07 13:38:01,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:38:01,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:38:01,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:38:01,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:38:01,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:02,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:02,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:38:02,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:38:02,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:38:02,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:38:02,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:02,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:02,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:02,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:02,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:02,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:02,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (1/1) ... [2019-12-07 13:38:02,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:38:02,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:38:02,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:38:02,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:38:02,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/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 [2019-12-07 13:38:02,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:38:02,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:38:02,229 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:38:02,229 INFO L287 CfgBuilder]: Removed 10 assume(true) statements. [2019-12-07 13:38:02,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:38:02 BoogieIcfgContainer [2019-12-07 13:38:02,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:38:02,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:38:02,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:38:02,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:38:02,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:38:01" (1/3) ... [2019-12-07 13:38:02,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff40086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:38:02, skipping insertion in model container [2019-12-07 13:38:02,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:01" (2/3) ... [2019-12-07 13:38:02,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff40086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:38:02, skipping insertion in model container [2019-12-07 13:38:02,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:38:02" (3/3) ... [2019-12-07 13:38:02,235 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_Newton_pseudoconstant.c [2019-12-07 13:38:02,241 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:38:02,245 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:38:02,252 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 13:38:02,266 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:38:02,266 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:38:02,266 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:38:02,266 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:38:02,266 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:38:02,267 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:38:02,267 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:38:02,267 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:38:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-12-07 13:38:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 13:38:02,279 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:38:02,279 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 13:38:02,279 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:38:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:38:02,285 INFO L82 PathProgramCache]: Analyzing trace with hash 78495602, now seen corresponding path program 1 times [2019-12-07 13:38:02,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:38:02,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57913091] [2019-12-07 13:38:02,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:38:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:38:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:38:02,377 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 13:38:02,378 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 13:38:02,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:38:02 BoogieIcfgContainer [2019-12-07 13:38:02,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:38:02,393 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:38:02,393 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:38:02,393 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:38:02,393 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:38:02" (3/4) ... [2019-12-07 13:38:02,396 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 13:38:02,396 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:38:02,397 INFO L168 Benchmark]: Toolchain (without parser) took 620.18 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -108.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:38:02,398 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 964.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:38:02,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.85 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -155.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-12-07 13:38:02,399 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:38:02,399 INFO L168 Benchmark]: Boogie Preprocessor took 15.65 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:38:02,400 INFO L168 Benchmark]: RCFGBuilder took 196.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. [2019-12-07 13:38:02,400 INFO L168 Benchmark]: TraceAbstraction took 161.79 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-12-07 13:38:02,400 INFO L168 Benchmark]: Witness Printer took 2.91 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:38:02,403 INFO L335 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 1.0 GB. Free memory is still 964.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 213.85 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -155.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.65 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 196.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 161.79 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * Witness Printer took 2.91 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticDOUBLEoperation at line 32, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryDOUBLEComparisonOperation at line 47. Possible FailurePath: [L10] double _EPS = 1e-6; [L37] double d, dd, r; [L38] double epsilon = 1e-8; [L40] d = 1. VAL [_EPS=1/1000000] [L40] COND TRUE d <= 20. [L42] dd = __VERIFIER_nondet_double() [L14] double xn, xnp1, residu, lsup, linf; [L15] int i, cond; [L16] COND TRUE Input <= 1.0 [L16] xn = 1.0 [L17] xnp1 = xn [L18] residu = 2.0*_EPS*(xn+xnp1) [L19] lsup = _EPS * (xn+xnp1) [L20] linf = -lsup [L21] cond = ((residu > lsup) || (residu < linf)) [L22] i = 0 VAL [_EPS=1/1000000] [L23] COND FALSE !(\read(cond)) [L32] return 1.0 / xnp1; [L45] r = SqrtR(dd) [L8] COND TRUE !(cond) VAL [_EPS=1/1000000] [L8] __VERIFIER_error() VAL [_EPS=1/1000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 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, 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 0.1.25-f470102 [2019-12-07 13:38:03,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:38:03,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:38:03,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:38:03,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:38:03,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:38:03,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:38:03,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:38:03,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:38:03,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:38:03,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:38:03,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:38:03,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:38:03,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:38:03,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:38:03,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:38:03,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:38:03,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:38:03,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:38:03,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:38:03,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:38:03,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:38:03,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:38:03,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:38:03,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:38:03,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:38:03,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:38:03,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:38:03,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:38:03,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:38:03,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:38:03,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:38:03,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:38:03,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:38:03,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:38:03,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:38:03,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:38:03,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:38:03,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:38:03,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:38:03,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:38:03,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 13:38:03,809 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:38:03,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:38:03,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 13:38:03,810 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 13:38:03,810 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 13:38:03,810 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 13:38:03,811 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 13:38:03,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 13:38:03,811 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 13:38:03,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:38:03,811 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:38:03,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:38:03,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:38:03,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:38:03,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:38:03,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:38:03,812 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:38:03,812 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 13:38:03,813 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 13:38:03,813 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:38:03,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:38:03,813 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:38:03,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:38:03,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:38:03,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 13:38:03,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:38:03,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:38:03,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:38:03,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:38:03,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:38:03,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:38:03,814 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 13:38:03,815 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 13:38:03,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:38:03,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:38:03,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 13:38:03,815 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_5453c685-d9c9-4192-a937-9e8c88c32776/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(__VERIFIER_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 -> 3ac23ee9420d5573e041ab9b716895f5d3bb685f [2019-12-07 13:38:03,989 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:38:04,000 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:38:04,003 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:38:04,004 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:38:04,005 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:38:04,005 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c [2019-12-07 13:38:04,054 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/data/7ed0cddf8/dda1a7a64cbd4cb0aa3412a647033cd6/FLAGa2469f3e7 [2019-12-07 13:38:04,423 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:38:04,424 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c [2019-12-07 13:38:04,428 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/data/7ed0cddf8/dda1a7a64cbd4cb0aa3412a647033cd6/FLAGa2469f3e7 [2019-12-07 13:38:04,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/data/7ed0cddf8/dda1a7a64cbd4cb0aa3412a647033cd6 [2019-12-07 13:38:04,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:38:04,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:38:04,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:38:04,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:38:04,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:38:04,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:04,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e547a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04, skipping insertion in model container [2019-12-07 13:38:04,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:04,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:38:04,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:38:04,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:38:04,968 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:38:04,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:38:04,992 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:38:04,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04 WrapperNode [2019-12-07 13:38:04,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:38:04,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:38:04,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:38:04,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:38:04,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:05,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:05,047 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:38:05,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:38:05,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:38:05,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:38:05,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:05,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:05,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:05,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:05,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:05,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:05,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (1/1) ... [2019-12-07 13:38:05,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:38:05,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:38:05,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:38:05,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:38:05,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/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 [2019-12-07 13:38:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:38:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:38:12,732 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:38:12,733 INFO L287 CfgBuilder]: Removed 10 assume(true) statements. [2019-12-07 13:38:12,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:38:12 BoogieIcfgContainer [2019-12-07 13:38:12,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:38:12,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:38:12,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:38:12,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:38:12,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:38:04" (1/3) ... [2019-12-07 13:38:12,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df38fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:38:12, skipping insertion in model container [2019-12-07 13:38:12,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:38:04" (2/3) ... [2019-12-07 13:38:12,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df38fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:38:12, skipping insertion in model container [2019-12-07 13:38:12,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:38:12" (3/3) ... [2019-12-07 13:38:12,738 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_Newton_pseudoconstant.c [2019-12-07 13:38:12,744 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:38:12,748 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:38:12,755 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 13:38:12,769 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:38:12,769 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:38:12,769 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:38:12,769 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:38:12,770 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:38:12,770 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:38:12,770 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:38:12,770 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:38:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-12-07 13:38:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 13:38:12,782 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:38:12,783 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:38:12,783 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:38:12,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:38:12,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1706227183, now seen corresponding path program 1 times [2019-12-07 13:38:12,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 13:38:12,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169327961] [2019-12-07 13:38:12,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/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 [2019-12-07 13:38:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:38:14,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 13:38:14,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:38:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:38:14,282 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:38:16,383 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ULTIMATE.start_SqrtR_~linf~0_5 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0)) v_ULTIMATE.start_SqrtR_~linf~0_5)) (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0)))) is different from false [2019-12-07 13:38:18,474 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((v_ULTIMATE.start_SqrtR_~linf~0_5 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0)) v_ULTIMATE.start_SqrtR_~linf~0_5)) (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0)))) is different from true [2019-12-07 13:38:26,337 WARN L192 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2019-12-07 13:38:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:38:26,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169327961] [2019-12-07 13:38:26,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:38:26,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-12-07 13:38:26,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421477492] [2019-12-07 13:38:26,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 13:38:26,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 13:38:26,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 13:38:26,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=27, Unknown=2, NotChecked=10, Total=56 [2019-12-07 13:38:26,354 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 8 states. [2019-12-07 13:38:28,814 WARN L838 $PredicateComparison]: unable to prove that (and (= ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)) c_~_EPS~0) (= ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xn~0) (= c_currentRoundingMode roundNearestTiesToEven) (or (forall ((v_ULTIMATE.start_SqrtR_~linf~0_5 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0)) v_ULTIMATE.start_SqrtR_~linf~0_5)) (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0))))) is different from false [2019-12-07 13:38:30,907 WARN L860 $PredicateComparison]: unable to prove that (and (= ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)) c_~_EPS~0) (= ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xn~0) (= c_currentRoundingMode roundNearestTiesToEven) (or (forall ((v_ULTIMATE.start_SqrtR_~linf~0_5 (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0)) v_ULTIMATE.start_SqrtR_~linf~0_5)) (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse0) (fp.mul c_currentRoundingMode c_~_EPS~0 .cse0))))) is different from true [2019-12-07 13:38:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:38:53,235 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2019-12-07 13:38:53,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:38:53,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-12-07 13:38:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:38:53,322 INFO L225 Difference]: With dead ends: 38 [2019-12-07 13:38:53,322 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 13:38:53,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=19, Invalid=27, Unknown=4, NotChecked=22, Total=72 [2019-12-07 13:38:53,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 13:38:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 13:38:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 13:38:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-12-07 13:38:53,349 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2019-12-07 13:38:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:38:53,349 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-12-07 13:38:53,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 13:38:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-12-07 13:38:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 13:38:53,350 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:38:53,350 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:38:53,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 13:38:53,551 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:38:53,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:38:53,552 INFO L82 PathProgramCache]: Analyzing trace with hash 68780179, now seen corresponding path program 1 times [2019-12-07 13:38:53,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 13:38:53,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488086468] [2019-12-07 13:38:53,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/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 [2019-12-07 13:38:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:38:58,193 WARN L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 13:38:58,194 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:38:58,773 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-07 13:39:01,130 WARN L838 $PredicateComparison]: unable to prove that (and (= ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)) c_~_EPS~0) (= c_currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse0 .cse1)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (= (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xn~0) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse0 .cse1)))))) is different from false [2019-12-07 13:39:03,357 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (= (_ bv1 32) c_ULTIMATE.start_SqrtR_~cond~0)) (.cse0 (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) c_currentRoundingMode 1.0)) (.cse7 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse6 .cse7)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.div c_currentRoundingMode .cse6 ULTIMATE.start_SqrtR_~Input)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse6 .cse7)))))) (.cse3 (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse5 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5) (fp.mul c_currentRoundingMode .cse4 .cse5)))) (.cse2 (= c_currentRoundingMode roundNearestTiesToEven))) (or (and (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (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 c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0)) v_prenex_1)) .cse0 .cse1 .cse2) (and .cse0 .cse1 .cse3 .cse2) (and .cse0 (= (_ bv0 32) c_ULTIMATE.start_SqrtR_~cond~0) (not .cse3) .cse2 (exists ((ULTIMATE.start_SqrtR_~linf~0 (_ FloatingPoint 11 53))) (not (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 c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0)) ULTIMATE.start_SqrtR_~linf~0)))))) is different from false [2019-12-07 13:39:05,458 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (= (_ bv1 32) c_ULTIMATE.start_SqrtR_~cond~0)) (.cse0 (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) c_currentRoundingMode 1.0)) (.cse7 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse6 .cse7)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.div c_currentRoundingMode .cse6 ULTIMATE.start_SqrtR_~Input)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse6 .cse7)))))) (.cse3 (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse5 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5) (fp.mul c_currentRoundingMode .cse4 .cse5)))) (.cse2 (= c_currentRoundingMode roundNearestTiesToEven))) (or (and (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (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 c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0)) v_prenex_1)) .cse0 .cse1 .cse2) (and .cse0 .cse1 .cse3 .cse2) (and .cse0 (= (_ bv0 32) c_ULTIMATE.start_SqrtR_~cond~0) (not .cse3) .cse2 (exists ((ULTIMATE.start_SqrtR_~linf~0 (_ FloatingPoint 11 53))) (not (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 c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0)) ULTIMATE.start_SqrtR_~linf~0)))))) is different from true [2019-12-07 13:39:07,853 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse0 .cse1)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse0 .cse1))))) (not (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse2) .cse3) (fp.mul c_currentRoundingMode .cse2 .cse3)))) (= c_currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_SqrtR_~linf~0 (_ FloatingPoint 11 53))) (not (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 c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0)) ULTIMATE.start_SqrtR_~linf~0)))) is different from false [2019-12-07 13:39:09,950 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse0 .cse1)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse0 .cse1))))) (not (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse2) .cse3) (fp.mul c_currentRoundingMode .cse2 .cse3)))) (= c_currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_SqrtR_~linf~0 (_ FloatingPoint 11 53))) (not (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 c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0)) ULTIMATE.start_SqrtR_~linf~0)))) is different from true [2019-12-07 13:39:12,637 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (ULTIMATE.start_SqrtR_~linf~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse2 (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 .cse2 .cse2))) (let ((.cse3 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse0 .cse1)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (= |c_ULTIMATE.start_SqrtR_#res| (fp.div c_currentRoundingMode .cse0 .cse2)) (not (fp.lt .cse3 ULTIMATE.start_SqrtR_~linf~0)) (not (fp.gt .cse3 (fp.mul c_currentRoundingMode .cse4 .cse5))) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse0 .cse1)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2019-12-07 13:39:15,228 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (ULTIMATE.start_SqrtR_~linf~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse2 (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 .cse2 .cse2))) (let ((.cse3 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add c_currentRoundingMode .cse0 .cse1)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (= |c_ULTIMATE.start_SqrtR_#res| (fp.div c_currentRoundingMode .cse0 .cse2)) (not (fp.lt .cse3 ULTIMATE.start_SqrtR_~linf~0)) (not (fp.gt .cse3 (fp.mul c_currentRoundingMode .cse4 .cse5))) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub c_currentRoundingMode .cse0 .cse1)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2019-12-07 13:39:15,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:39:17,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:39:38,395 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)) (ULTIMATE.start_SqrtR_~linf~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse5 (fp.div roundNearestTiesToEven .cse0 ULTIMATE.start_SqrtR_~Input))) (let ((.cse3 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse4 (fp.add roundNearestTiesToEven .cse5 .cse5))) (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 100000000.0))) (.cse2 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse3) .cse4))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add roundNearestTiesToEven .cse0 .cse1)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub roundNearestTiesToEven .cse0 .cse1)) (not (fp.gt .cse2 (fp.mul roundNearestTiesToEven .cse3 .cse4))) (not (fp.lt .cse2 ULTIMATE.start_SqrtR_~linf~0)) (not (fp.geq (fp.div roundNearestTiesToEven .cse0 .cse5) ((_ to_fp 11 53) roundNearestTiesToEven (/ 9.0 10.0)))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)))))))) .cse6) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (ULTIMATE.start_SqrtR_~linf~0 (_ FloatingPoint 11 53))) (let ((.cse7 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse13 (fp.div roundNearestTiesToEven .cse7 ULTIMATE.start_SqrtR_~Input))) (let ((.cse11 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse12 (fp.add roundNearestTiesToEven .cse13 .cse13))) (let ((.cse8 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 100000000.0))) (.cse10 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse11) .cse12)) (.cse9 (fp.div roundNearestTiesToEven .cse7 .cse13))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add roundNearestTiesToEven .cse7 .cse8)) (fp.geq .cse9 ((_ to_fp 11 53) roundNearestTiesToEven (/ 9.0 10.0))) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub roundNearestTiesToEven .cse7 .cse8)) (not (fp.gt .cse10 (fp.mul roundNearestTiesToEven .cse11 .cse12))) (not (fp.lt .cse10 ULTIMATE.start_SqrtR_~linf~0)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse7)) (fp.leq .cse9 ((_ to_fp 11 53) roundNearestTiesToEven 5.0)))))))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53)) (ULTIMATE.start_SqrtR_~linf~0 (_ FloatingPoint 11 53))) (let ((.cse14 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse16 (fp.div roundNearestTiesToEven .cse14 ULTIMATE.start_SqrtR_~Input))) (let ((.cse18 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse19 (fp.add roundNearestTiesToEven .cse16 .cse16))) (let ((.cse15 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 100000000.0))) (.cse17 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse18) .cse19))) (and (fp.leq ULTIMATE.start_SqrtR_~Input (fp.add roundNearestTiesToEven .cse14 .cse15)) (fp.geq ULTIMATE.start_SqrtR_~Input (fp.sub roundNearestTiesToEven .cse14 .cse15)) (not (fp.leq (fp.div roundNearestTiesToEven .cse14 .cse16) ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (not (fp.gt .cse17 (fp.mul roundNearestTiesToEven .cse18 .cse19))) (not (fp.lt .cse17 ULTIMATE.start_SqrtR_~linf~0)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse14)))))))) .cse6))) is different from false [2019-12-07 13:39:51,658 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-12-07 13:39:51,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488086468] [2019-12-07 13:39:51,660 INFO L343 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") [2019-12-07 13:39:51,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772922783] [2019-12-07 13:39:51,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 13:39:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:39:57,240 WARN L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 13:39:57,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:39:57,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:39:57,247 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken [2019-12-07 13:39:57,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002049022] [2019-12-07 13:39:57,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5453c685-d9c9-4192-a937-9e8c88c32776/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:41:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:41:09,434 WARN L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 13:41:09,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:41:09,436 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@3a04f399 [2019-12-07 13:41:09,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:41:09,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 13:41:09,436 ERROR L206 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2019-12-07 13:41:09,436 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 13:41:10,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:41:10,054 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 13:41:10,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:41:10 BoogieIcfgContainer [2019-12-07 13:41:10,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:41:10,055 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:41:10,055 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:41:10,055 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:41:10,056 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:38:12" (3/4) ... [2019-12-07 13:41:10,058 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 13:41:10,058 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:41:10,059 INFO L168 Benchmark]: Toolchain (without parser) took 185226.54 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 951.0 MB in the beginning and 994.4 MB in the end (delta: -43.4 MB). Peak memory consumption was 74.6 MB. Max. memory is 11.5 GB. [2019-12-07 13:41:10,060 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:41:10,060 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.60 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:41:10,061 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -172.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. [2019-12-07 13:41:10,062 INFO L168 Benchmark]: Boogie Preprocessor took 19.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-12-07 13:41:10,062 INFO L168 Benchmark]: RCFGBuilder took 7666.32 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:41:10,063 INFO L168 Benchmark]: TraceAbstraction took 177320.79 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 994.4 MB in the end (delta: 87.3 MB). Peak memory consumption was 87.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:41:10,063 INFO L168 Benchmark]: Witness Printer took 3.03 ms. Allocated memory is still 1.1 GB. Free memory is still 994.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:41:10,066 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 159.60 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 54.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -172.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 7666.32 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 177320.79 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 994.4 MB in the end (delta: 87.3 MB). Peak memory consumption was 87.3 MB. Max. memory is 11.5 GB. * Witness Printer took 3.03 ms. Allocated memory is still 1.1 GB. Free memory is still 994.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L10] double _EPS = 1e-6; [L37] double d, dd, r; [L38] double epsilon = 1e-8; [L40] d = 1. [L40] COND TRUE d <= 20. [L42] dd = __VERIFIER_nondet_double() [L14] double xn, xnp1, residu, lsup, linf; [L15] int i, cond; [L16] COND FALSE !(Input <= 1.0) [L16] xn = 1.0/Input [L17] xnp1 = xn [L18] residu = 2.0*_EPS*(xn+xnp1) [L19] lsup = _EPS * (xn+xnp1) [L20] linf = -lsup [L21] cond = ((residu > lsup) || (residu < linf)) [L22] i = 0 [L23] COND FALSE !(\read(cond)) [L32] return 1.0 / xnp1; [L45] r = SqrtR(dd) [L8] COND TRUE !(cond) [L8] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Result: UNKNOWN, OverallTime: 177.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 26.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 5 SDslu, 31 SDs, 0 SdLazy, 27 SolverSat, 0 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 21.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 18 ConstructedInterpolants, 1 QuantifiedInterpolants, 1584 SizeOfPredicates, 8 NumberOfNonLiveVariables, 26 ConjunctsInSsa, 8 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, 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...