./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.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_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/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 044666208476da4ad4fcec9a18fadf3bde3ce58f ................................................................................................................................................................................................................................................... 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_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/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 044666208476da4ad4fcec9a18fadf3bde3ce58f ................................................................................................................................................................................................................................................................................................................................................ 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 19:29:16,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:29:16,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:29:16,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:29:16,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:29:16,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:29:16,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:29:16,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:29:16,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:29:16,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:29:16,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:29:16,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:29:16,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:29:16,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:29:16,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:29:16,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:29:16,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:29:16,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:29:16,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:29:16,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:29:16,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:29:16,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:29:16,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:29:16,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:29:16,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:29:16,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:29:16,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:29:16,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:29:16,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:29:16,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:29:16,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:29:16,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:29:16,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:29:16,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:29:16,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:29:16,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:29:16,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:29:16,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:29:16,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:29:16,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:29:16,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:29:16,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 19:29:16,776 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:29:16,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:29:16,777 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:29:16,778 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:29:16,778 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:29:16,778 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:29:16,778 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 19:29:16,778 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:29:16,779 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:29:16,779 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 19:29:16,779 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 19:29:16,779 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:29:16,779 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 19:29:16,779 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 19:29:16,780 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 19:29:16,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:29:16,780 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 19:29:16,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 19:29:16,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 19:29:16,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:29:16,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:29:16,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:29:16,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:29:16,782 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 19:29:16,782 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 19:29:16,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:29:16,782 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:29:16,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:29:16,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:29:16,783 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:29:16,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:29:16,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:29:16,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:29:16,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:29:16,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:29:16,784 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 19:29:16,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 19:29:16,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:29:16,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:29:16,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:29:16,784 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_10281951-b76e-4864-9ae8-93535be58d5a/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 -> 044666208476da4ad4fcec9a18fadf3bde3ce58f [2019-12-07 19:29:16,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:29:16,896 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:29:16,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:29:16,900 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:29:16,900 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:29:16,900 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2019-12-07 19:29:16,937 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/data/72c5684c0/593790f9d07a4615b984afe04b38117d/FLAG0df5c8cd4 [2019-12-07 19:29:17,365 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:29:17,365 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2019-12-07 19:29:17,369 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/data/72c5684c0/593790f9d07a4615b984afe04b38117d/FLAG0df5c8cd4 [2019-12-07 19:29:17,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/data/72c5684c0/593790f9d07a4615b984afe04b38117d [2019-12-07 19:29:17,380 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:29:17,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:29:17,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:29:17,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:29:17,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:29:17,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3260b9b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17, skipping insertion in model container [2019-12-07 19:29:17,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:29:17,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:29:17,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:29:17,556 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:29:17,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:29:17,583 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:29:17,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17 WrapperNode [2019-12-07 19:29:17,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:29:17,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:29:17,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:29:17,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:29:17,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:29:17,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:29:17,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:29:17,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:29:17,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (1/1) ... [2019-12-07 19:29:17,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:29:17,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:29:17,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:29:17,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:29:17,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/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 19:29:17,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:29:17,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:29:17,806 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:29:17,806 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 19:29:17,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:29:17 BoogieIcfgContainer [2019-12-07 19:29:17,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:29:17,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:29:17,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:29:17,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:29:17,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:29:17" (1/3) ... [2019-12-07 19:29:17,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4c2da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:29:17, skipping insertion in model container [2019-12-07 19:29:17,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:17" (2/3) ... [2019-12-07 19:29:17,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4c2da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:29:17, skipping insertion in model container [2019-12-07 19:29:17,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:29:17" (3/3) ... [2019-12-07 19:29:17,812 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2019-12-07 19:29:17,818 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:29:17,822 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:29:17,829 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:29:17,844 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:29:17,844 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:29:17,844 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:29:17,844 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:29:17,844 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:29:17,844 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:29:17,844 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:29:17,844 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:29:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-12-07 19:29:17,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 19:29:17,856 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:29:17,857 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 19:29:17,857 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:29:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:29:17,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2366848, now seen corresponding path program 1 times [2019-12-07 19:29:17,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:29:17,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035813876] [2019-12-07 19:29:17,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:29:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:29:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:29:17,951 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 19:29:17,952 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 19:29:17,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:29:17 BoogieIcfgContainer [2019-12-07 19:29:17,967 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:29:17,967 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:29:17,967 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:29:17,967 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:29:17,968 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:29:17" (3/4) ... [2019-12-07 19:29:17,970 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 19:29:17,970 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:29:17,972 INFO L168 Benchmark]: Toolchain (without parser) took 590.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -108.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:29:17,972 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:29:17,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.03 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -147.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 19:29:17,973 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.15 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 19:29:17,973 INFO L168 Benchmark]: Boogie Preprocessor took 13.82 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 19:29:17,974 INFO L168 Benchmark]: RCFGBuilder took 187.46 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-12-07 19:29:17,974 INFO L168 Benchmark]: TraceAbstraction took 159.45 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: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 11.5 GB. [2019-12-07 19:29:17,974 INFO L168 Benchmark]: Witness Printer took 2.92 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 19:29:17,976 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 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 203.03 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -147.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.15 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. * Boogie Preprocessor took 13.82 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. * RCFGBuilder took 187.46 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 159.45 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: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 11.5 GB. * Witness Printer took 2.92 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: 15]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticDOUBLEoperation at line 39, overapproximation of someUnaryDOUBLEoperation at line 27, overapproximation of someBinaryDOUBLEComparisonOperation at line 51. Possible FailurePath: [L17] double _EPS = 1e-6; [L44] double d, r; [L46] d = __VERIFIER_nondet_double() [L21] double xn, xnp1, residu, lsup, linf; [L22] int i, cond; [L23] COND TRUE Input <= 1.0 [L23] xn = 1.0 [L24] xnp1 = xn [L25] residu = 2.0*_EPS*(xn+xnp1) [L26] lsup = _EPS * (xn+xnp1) [L27] linf = -lsup [L28] cond = ((residu > lsup) || (residu < linf)) [L29] i = 0 VAL [_EPS=1/1000000] [L30] COND FALSE !(\read(cond)) [L39] return 1.0 / xnp1; [L49] r = SqrtR(d) [L15] COND TRUE !(cond) VAL [_EPS=1/1000000] [L15] __VERIFIER_error() VAL [_EPS=1/1000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 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=7occurred 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, 4 NumberOfCodeBlocks, 4 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 19:29:19,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:29:19,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:29:19,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:29:19,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:29:19,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:29:19,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:29:19,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:29:19,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:29:19,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:29:19,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:29:19,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:29:19,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:29:19,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:29:19,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:29:19,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:29:19,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:29:19,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:29:19,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:29:19,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:29:19,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:29:19,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:29:19,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:29:19,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:29:19,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:29:19,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:29:19,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:29:19,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:29:19,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:29:19,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:29:19,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:29:19,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:29:19,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:29:19,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:29:19,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:29:19,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:29:19,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:29:19,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:29:19,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:29:19,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:29:19,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:29:19,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 19:29:19,374 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:29:19,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:29:19,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:29:19,375 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:29:19,375 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:29:19,375 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:29:19,375 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:29:19,376 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:29:19,376 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:29:19,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:29:19,376 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 19:29:19,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 19:29:19,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:29:19,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:29:19,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:29:19,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:29:19,377 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 19:29:19,377 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 19:29:19,377 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 19:29:19,378 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 19:29:19,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:29:19,378 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:29:19,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:29:19,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:29:19,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 19:29:19,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:29:19,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:29:19,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:29:19,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:29:19,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:29:19,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:29:19,379 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 19:29:19,379 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 19:29:19,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:29:19,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:29:19,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:29:19,380 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_10281951-b76e-4864-9ae8-93535be58d5a/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 -> 044666208476da4ad4fcec9a18fadf3bde3ce58f [2019-12-07 19:29:19,545 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:29:19,552 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:29:19,554 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:29:19,555 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:29:19,555 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:29:19,556 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2019-12-07 19:29:19,593 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/data/52b28bec9/3944197c596d46e0ab027d49e6cec3d8/FLAG2d052876c [2019-12-07 19:29:19,904 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:29:19,905 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2019-12-07 19:29:19,909 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/data/52b28bec9/3944197c596d46e0ab027d49e6cec3d8/FLAG2d052876c [2019-12-07 19:29:19,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/bin/utaipan/data/52b28bec9/3944197c596d46e0ab027d49e6cec3d8 [2019-12-07 19:29:19,920 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:29:19,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:29:19,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:29:19,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:29:19,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:29:19,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:29:19" (1/1) ... [2019-12-07 19:29:19,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692431c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:19, skipping insertion in model container [2019-12-07 19:29:19,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:29:19" (1/1) ... [2019-12-07 19:29:19,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:29:19,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:29:20,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:29:20,054 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:29:20,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:29:20,079 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:29:20,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20 WrapperNode [2019-12-07 19:29:20,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:29:20,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:29:20,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:29:20,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:29:20,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (1/1) ... [2019-12-07 19:29:20,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (1/1) ... [2019-12-07 19:29:20,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:29:20,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:29:20,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:29:20,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:29:20,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (1/1) ... [2019-12-07 19:29:20,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (1/1) ... [2019-12-07 19:29:20,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (1/1) ... [2019-12-07 19:29:20,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (1/1) ... [2019-12-07 19:29:20,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (1/1) ... [2019-12-07 19:29:20,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (1/1) ... [2019-12-07 19:29:20,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (1/1) ... [2019-12-07 19:29:20,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:29:20,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:29:20,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:29:20,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:29:20,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/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 19:29:20,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:29:20,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:29:29,412 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:29:29,412 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 19:29:29,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:29:29 BoogieIcfgContainer [2019-12-07 19:29:29,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:29:29,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:29:29,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:29:29,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:29:29,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:29:19" (1/3) ... [2019-12-07 19:29:29,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5720f44c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:29:29, skipping insertion in model container [2019-12-07 19:29:29,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:29:20" (2/3) ... [2019-12-07 19:29:29,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5720f44c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:29:29, skipping insertion in model container [2019-12-07 19:29:29,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:29:29" (3/3) ... [2019-12-07 19:29:29,419 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2019-12-07 19:29:29,426 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:29:29,431 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:29:29,439 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:29:29,455 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:29:29,455 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:29:29,455 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:29:29,455 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:29:29,455 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:29:29,456 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:29:29,456 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:29:29,456 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:29:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-12-07 19:29:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 19:29:29,468 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:29:29,469 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:29:29,469 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:29:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:29:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash -590190995, now seen corresponding path program 1 times [2019-12-07 19:29:29,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:29:29,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819597896] [2019-12-07 19:29:29,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/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 19:29:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:29:30,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 19:29:30,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:29:30,925 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 19:29:30,925 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:29:33,042 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 19:29:35,138 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 19:29:40,776 WARN L192 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2019-12-07 19:29:40,778 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 19:29:40,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819597896] [2019-12-07 19:29:40,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:29:40,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-12-07 19:29:40,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388769780] [2019-12-07 19:29:40,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 19:29:40,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:29:40,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 19:29:40,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=27, Unknown=2, NotChecked=10, Total=56 [2019-12-07 19:29:40,796 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 8 states. [2019-12-07 19:29:42,950 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 19:29:45,052 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 19:29:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:29:56,705 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2019-12-07 19:29:56,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 19:29:56,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-12-07 19:29:56,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:29:56,734 INFO L225 Difference]: With dead ends: 25 [2019-12-07 19:29:56,734 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 19:29:56,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=19, Invalid=27, Unknown=4, NotChecked=22, Total=72 [2019-12-07 19:29:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 19:29:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-12-07 19:29:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 19:29:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-12-07 19:29:56,759 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2019-12-07 19:29:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:29:56,760 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-12-07 19:29:56,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 19:29:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-12-07 19:29:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 19:29:56,760 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:29:56,760 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:29:56,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 19:29:56,962 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:29:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:29:56,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1184816367, now seen corresponding path program 1 times [2019-12-07 19:29:56,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:29:56,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836251526] [2019-12-07 19:29:56,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/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 19:30:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:30:00,677 WARN L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 19:30:00,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:30:03,117 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))) (and (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (= (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input) c_ULTIMATE.start_SqrtR_~xn~0) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)))))) is different from false [2019-12-07 19:30:06,148 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse9 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse5 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse8) .cse9)) (.cse6 (fp.mul c_currentRoundingMode .cse8 .cse9))) (let ((.cse1 (fp.gt .cse5 .cse6)) (.cse0 (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse7 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse7)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.div c_currentRoundingMode .cse7 ULTIMATE.start_SqrtR_~Input)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)))))) (.cse2 (fp.lt .cse5 (fp.neg .cse6))) (.cse4 (= (_ bv1 32) c_ULTIMATE.start_SqrtR_~cond~0)) (.cse3 (= c_currentRoundingMode roundNearestTiesToEven))) (or (and .cse0 (= (_ bv0 32) c_ULTIMATE.start_SqrtR_~cond~0) (not .cse1) (not .cse2) .cse3) (and .cse0 .cse4 .cse1 .cse3) (and .cse0 .cse2 .cse4 .cse3))))) is different from false [2019-12-07 19:30:08,254 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse8 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse9 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse5 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse8) .cse9)) (.cse6 (fp.mul c_currentRoundingMode .cse8 .cse9))) (let ((.cse1 (fp.gt .cse5 .cse6)) (.cse0 (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse7 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse7)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.div c_currentRoundingMode .cse7 ULTIMATE.start_SqrtR_~Input)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)))))) (.cse2 (fp.lt .cse5 (fp.neg .cse6))) (.cse4 (= (_ bv1 32) c_ULTIMATE.start_SqrtR_~cond~0)) (.cse3 (= c_currentRoundingMode roundNearestTiesToEven))) (or (and .cse0 (= (_ bv0 32) c_ULTIMATE.start_SqrtR_~cond~0) (not .cse1) (not .cse2) .cse3) (and .cse0 .cse4 .cse1 .cse3) (and .cse0 .cse2 .cse4 .cse3))))) is different from true [2019-12-07 19:30:10,632 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse4 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse1 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse3) .cse4)) (.cse2 (fp.mul c_currentRoundingMode .cse3 .cse4))) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0))))) (not (fp.gt .cse1 .cse2)) (not (fp.lt .cse1 (fp.neg .cse2))) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from false [2019-12-07 19:30:12,736 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse4 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xnp1~0 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse1 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse3) .cse4)) (.cse2 (fp.mul c_currentRoundingMode .cse3 .cse4))) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (= c_ULTIMATE.start_SqrtR_~xnp1~0 (fp.div c_currentRoundingMode .cse0 ULTIMATE.start_SqrtR_~Input)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0))))) (not (fp.gt .cse1 .cse2)) (not (fp.lt .cse1 (fp.neg .cse2))) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2019-12-07 19:30:15,462 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))) (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 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5)) (.cse3 (fp.mul c_currentRoundingMode .cse4 .cse5))) (and (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)) (= |c_ULTIMATE.start_SqrtR_#res| (fp.div c_currentRoundingMode .cse0 .cse1)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (not (fp.gt .cse2 .cse3)) (not (fp.lt .cse2 (fp.neg .cse3))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2019-12-07 19:30:15,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:30:18,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:30:37,951 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))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse1 (fp.div roundNearestTiesToEven .cse0 ULTIMATE.start_SqrtR_~Input))) (let ((.cse4 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse5 (fp.add roundNearestTiesToEven .cse1 .cse1))) (let ((.cse2 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse4) .cse5)) (.cse3 (fp.mul roundNearestTiesToEven .cse4 .cse5))) (and (not (fp.leq (fp.div roundNearestTiesToEven .cse0 .cse1) ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.gt .cse2 .cse3)) (not (fp.lt .cse2 (fp.neg .cse3))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0)))))))) .cse6) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse10 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse11 (fp.div roundNearestTiesToEven .cse10 ULTIMATE.start_SqrtR_~Input))) (let ((.cse12 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse13 (fp.add roundNearestTiesToEven .cse11 .cse11))) (let ((.cse8 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse12) .cse13)) (.cse9 (fp.mul roundNearestTiesToEven .cse12 .cse13)) (.cse7 (fp.div roundNearestTiesToEven .cse10 .cse11))) (and (fp.geq .cse7 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.gt .cse8 .cse9)) (not (fp.lt .cse8 (fp.neg .cse9))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse10)) (fp.leq .cse7 ((_ 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))) (let ((.cse14 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse15 (fp.div roundNearestTiesToEven .cse14 ULTIMATE.start_SqrtR_~Input))) (let ((.cse18 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse19 (fp.add roundNearestTiesToEven .cse15 .cse15))) (let ((.cse16 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse18) .cse19)) (.cse17 (fp.mul roundNearestTiesToEven .cse18 .cse19))) (and (not (fp.geq (fp.div roundNearestTiesToEven .cse14 .cse15) ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.gt .cse16 .cse17)) (not (fp.lt .cse16 (fp.neg .cse17))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse14)))))))) .cse6))) is different from false [2019-12-07 19:30:53,093 WARN L838 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse3 (fp.div roundNearestTiesToEven .cse2 v_prenex_1))) (let ((.cse4 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse5 (fp.add roundNearestTiesToEven .cse3 .cse3))) (let ((.cse0 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse4) .cse5)) (.cse1 (fp.mul roundNearestTiesToEven .cse4 .cse5))) (and (not (fp.gt .cse0 .cse1)) (fp.geq v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.leq v_prenex_1 .cse2)) (not (fp.leq (fp.div roundNearestTiesToEven .cse2 .cse3) ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (not (fp.lt .cse0 (fp.neg .cse1))) (fp.leq v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 20.0)))))))) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse7 (fp.div roundNearestTiesToEven .cse6 ULTIMATE.start_SqrtR_~Input))) (let ((.cse10 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse11 (fp.add roundNearestTiesToEven .cse7 .cse7))) (let ((.cse8 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse10) .cse11)) (.cse9 (fp.mul roundNearestTiesToEven .cse10 .cse11))) (and (not (fp.geq (fp.div roundNearestTiesToEven .cse6 .cse7) ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.gt .cse8 .cse9)) (not (fp.lt .cse8 (fp.neg .cse9))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6))))))))) is different from false [2019-12-07 19:30:55,708 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse3 (fp.div roundNearestTiesToEven .cse2 v_prenex_1))) (let ((.cse4 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse5 (fp.add roundNearestTiesToEven .cse3 .cse3))) (let ((.cse0 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse4) .cse5)) (.cse1 (fp.mul roundNearestTiesToEven .cse4 .cse5))) (and (not (fp.gt .cse0 .cse1)) (fp.geq v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.leq v_prenex_1 .cse2)) (not (fp.leq (fp.div roundNearestTiesToEven .cse2 .cse3) ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (not (fp.lt .cse0 (fp.neg .cse1))) (fp.leq v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 20.0)))))))) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse7 (fp.div roundNearestTiesToEven .cse6 ULTIMATE.start_SqrtR_~Input))) (let ((.cse10 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse11 (fp.add roundNearestTiesToEven .cse7 .cse7))) (let ((.cse8 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse10) .cse11)) (.cse9 (fp.mul roundNearestTiesToEven .cse10 .cse11))) (and (not (fp.geq (fp.div roundNearestTiesToEven .cse6 .cse7) ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0)))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.gt .cse8 .cse9)) (not (fp.lt .cse8 (fp.neg .cse9))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse6))))))))) is different from true [2019-12-07 19:30:55,711 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 19:30:55,711 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:30:58,154 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))) (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0)))) is different from false [2019-12-07 19:31:00,532 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))) (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0)))) is different from true [2019-12-07 19:31:04,842 WARN L860 $PredicateComparison]: unable to prove that (or (not (= (_ bv0 32) c_ULTIMATE.start_SqrtR_~cond~0)) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xnp1~0))) (and (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))) (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 5.0))))) is different from true [2019-12-07 19:31:07,311 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (let ((.cse0 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse3)) (.cse1 (fp.mul c_currentRoundingMode c_~_EPS~0 .cse3))) (or (fp.lt .cse0 (fp.neg .cse1)) (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xn~0))) (and (fp.geq .cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))) (fp.leq .cse2 ((_ to_fp 11 53) c_currentRoundingMode 5.0)))) (fp.gt .cse0 .cse1)))) is different from false [2019-12-07 19:31:09,794 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_SqrtR_~xn~0 c_ULTIMATE.start_SqrtR_~xn~0))) (let ((.cse0 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) c_~_EPS~0) .cse3)) (.cse1 (fp.mul c_currentRoundingMode c_~_EPS~0 .cse3))) (or (fp.lt .cse0 (fp.neg .cse1)) (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) c_ULTIMATE.start_SqrtR_~xn~0))) (and (fp.geq .cse2 ((_ to_fp 11 53) c_currentRoundingMode (/ 3.0 10.0))) (fp.leq .cse2 ((_ to_fp 11 53) c_currentRoundingMode 5.0)))) (fp.gt .cse0 .cse1)))) is different from true [2019-12-07 19:31:10,499 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-12-07 19:31:10,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836251526] [2019-12-07 19:31:10,500 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 19:31:10,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [93455834] [2019-12-07 19:31:10,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/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 19:31:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:31:16,373 WARN L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 19:31:16,374 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@67f5f7b1 [2019-12-07 19:31:16,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918895057] [2019-12-07 19:31:16,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10281951-b76e-4864-9ae8-93535be58d5a/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 19:33:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:33:13,711 WARN L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 19:33:13,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:33:13,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:33:13,726 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 19:33:13,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:33:13,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 19:33:13,726 ERROR L206 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2019-12-07 19:33:13,726 INFO L475 BasicCegarLoop]: Counterexample might be feasible [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forcibly destroying the process [2019-12-07 19:33:14,332 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 19:33:14,344 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 19:33:14,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:33:14 BoogieIcfgContainer [2019-12-07 19:33:14,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:33:14,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:33:14,345 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:33:14,345 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:33:14,346 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:29:29" (3/4) ... [2019-12-07 19:33:14,349 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 19:33:14,349 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:33:14,350 INFO L168 Benchmark]: Toolchain (without parser) took 234429.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 952.4 MB in the beginning and 972.6 MB in the end (delta: -20.2 MB). Peak memory consumption was 81.5 MB. Max. memory is 11.5 GB. [2019-12-07 19:33:14,351 INFO L168 Benchmark]: CDTParser took 0.13 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 19:33:14,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.01 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:33:14,352 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.71 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -147.7 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. [2019-12-07 19:33:14,352 INFO L168 Benchmark]: Boogie Preprocessor took 19.34 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: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2019-12-07 19:33:14,353 INFO L168 Benchmark]: RCFGBuilder took 9251.45 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: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. [2019-12-07 19:33:14,353 INFO L168 Benchmark]: TraceAbstraction took 224930.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 972.6 MB in the end (delta: 95.4 MB). Peak memory consumption was 95.4 MB. Max. memory is 11.5 GB. [2019-12-07 19:33:14,354 INFO L168 Benchmark]: Witness Printer took 3.84 ms. Allocated memory is still 1.1 GB. Free memory is still 972.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:33:14,357 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 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 158.01 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 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 62.71 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -147.7 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.34 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: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 9251.45 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: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 224930.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 972.6 MB in the end (delta: 95.4 MB). Peak memory consumption was 95.4 MB. Max. memory is 11.5 GB. * Witness Printer took 3.84 ms. Allocated memory is still 1.1 GB. Free memory is still 972.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L17] double _EPS = 1e-6; [L44] double d, r; [L46] d = __VERIFIER_nondet_double() [L21] double xn, xnp1, residu, lsup, linf; [L22] int i, cond; [L23] COND FALSE !(Input <= 1.0) [L23] xn = 1.0/Input [L24] xnp1 = xn [L25] residu = 2.0*_EPS*(xn+xnp1) [L26] lsup = _EPS * (xn+xnp1) [L27] linf = -lsup [L28] cond = ((residu > lsup) || (residu < linf)) [L29] i = 0 [L30] COND FALSE !(\read(cond)) [L39] return 1.0 / xnp1; [L49] r = SqrtR(d) [L15] COND TRUE !(cond) [L15] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Result: UNKNOWN, OverallTime: 224.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 15.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 4 SDslu, 25 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 10.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 14.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 1.1s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 16 ConstructedInterpolants, 1 QuantifiedInterpolants, 1112 SizeOfPredicates, 8 NumberOfNonLiveVariables, 23 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...