./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f60c1e7f1bcabd47cf7b5def116f38f131aaa102 ............................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c -s /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f60c1e7f1bcabd47cf7b5def116f38f131aaa102 ........................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:38:53,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:38:53,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:38:53,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:38:53,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:38:53,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:38:53,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:38:53,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:38:53,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:38:53,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:38:53,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:38:53,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:38:53,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:38:53,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:38:53,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:38:53,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:38:53,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:38:53,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:38:53,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:38:53,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:38:53,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:38:53,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:38:53,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:38:53,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:38:53,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:38:53,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:38:53,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:38:53,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:38:53,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:38:53,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:38:53,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:38:53,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:38:53,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:38:53,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:38:53,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:38:53,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:38:53,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:38:53,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:38:53,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:38:53,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:38:53,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:38:53,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 18:38:53,406 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:38:53,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:38:53,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:38:53,407 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:38:53,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:38:53,408 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:38:53,408 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:38:53,408 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:38:53,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:38:53,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:38:53,408 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:38:53,408 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:38:53,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:38:53,409 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:38:53,409 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:38:53,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:38:53,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:38:53,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:38:53,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:38:53,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:38:53,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:38:53,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:38:53,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:38:53,410 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:38:53,410 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:38:53,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:38:53,411 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:38:53,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:38:53,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:38:53,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:38:53,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:38:53,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:38:53,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:38:53,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:38:53,412 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:38:53,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:38:53,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:38:53,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:38:53,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:38:53,412 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f60c1e7f1bcabd47cf7b5def116f38f131aaa102 [2020-12-09 18:38:53,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:38:53,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:38:53,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:38:53,622 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:38:53,622 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:38:53,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2020-12-09 18:38:53,664 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/data/7fbd92e19/6096b8415eff4d45a6c00388cbe70256/FLAG367b257c4 [2020-12-09 18:38:54,042 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:38:54,042 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2020-12-09 18:38:54,048 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/data/7fbd92e19/6096b8415eff4d45a6c00388cbe70256/FLAG367b257c4 [2020-12-09 18:38:54,057 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/data/7fbd92e19/6096b8415eff4d45a6c00388cbe70256 [2020-12-09 18:38:54,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:38:54,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:38:54,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:38:54,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:38:54,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:38:54,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d77cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54, skipping insertion in model container [2020-12-09 18:38:54,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:38:54,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:38:54,189 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2020-12-09 18:38:54,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:38:54,218 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:38:54,228 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2020-12-09 18:38:54,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:38:54,248 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:38:54,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54 WrapperNode [2020-12-09 18:38:54,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:38:54,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:38:54,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:38:54,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:38:54,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:38:54,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:38:54,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:38:54,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:38:54,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (1/1) ... [2020-12-09 18:38:54,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:38:54,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:38:54,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:38:54,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:38:54,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:38:54,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 18:38:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:38:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:38:54,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:38:54,587 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:38:54,587 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 18:38:54,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:38:54 BoogieIcfgContainer [2020-12-09 18:38:54,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:38:54,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:38:54,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:38:54,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:38:54,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:38:54" (1/3) ... [2020-12-09 18:38:54,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23551ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:38:54, skipping insertion in model container [2020-12-09 18:38:54,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:54" (2/3) ... [2020-12-09 18:38:54,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23551ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:38:54, skipping insertion in model container [2020-12-09 18:38:54,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:38:54" (3/3) ... [2020-12-09 18:38:54,597 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2020-12-09 18:38:54,611 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:38:54,614 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 18:38:54,624 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 18:38:54,646 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:38:54,646 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:38:54,646 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:38:54,646 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:38:54,646 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:38:54,646 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:38:54,646 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:38:54,647 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:38:54,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-12-09 18:38:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 18:38:54,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:38:54,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 18:38:54,663 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:38:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:38:54,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2671709, now seen corresponding path program 1 times [2020-12-09 18:38:54,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:38:54,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666343045] [2020-12-09 18:38:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:38:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:38:54,766 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:38:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:38:54,793 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:38:54,808 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 18:38:54,809 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 18:38:54,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:38:54,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:38:54 BoogieIcfgContainer [2020-12-09 18:38:54,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:38:54,831 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:38:54,831 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:38:54,831 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:38:54,831 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:38:54" (3/4) ... [2020-12-09 18:38:54,834 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 18:38:54,834 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:38:54,836 INFO L168 Benchmark]: Toolchain (without parser) took 775.09 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 49.5 MB in the beginning and 88.9 MB in the end (delta: -39.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:38:54,836 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 90.2 MB. Free memory is still 65.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:38:54,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.71 ms. Allocated memory is still 90.2 MB. Free memory was 49.3 MB in the beginning and 61.2 MB in the end (delta: -11.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2020-12-09 18:38:54,837 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.10 ms. Allocated memory is still 90.2 MB. Free memory was 61.2 MB in the beginning and 59.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:38:54,838 INFO L168 Benchmark]: Boogie Preprocessor took 15.92 ms. Allocated memory is still 90.2 MB. Free memory was 59.6 MB in the beginning and 58.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:38:54,838 INFO L168 Benchmark]: RCFGBuilder took 299.46 ms. Allocated memory is still 90.2 MB. Free memory was 58.4 MB in the beginning and 53.4 MB in the end (delta: 5.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 18:38:54,839 INFO L168 Benchmark]: TraceAbstraction took 239.45 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 53.1 MB in the beginning and 88.9 MB in the end (delta: -35.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:38:54,839 INFO L168 Benchmark]: Witness Printer took 3.23 ms. Allocated memory is still 111.1 MB. Free memory is still 88.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:38:54,842 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 90.2 MB. Free memory is still 65.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 187.71 ms. Allocated memory is still 90.2 MB. Free memory was 49.3 MB in the beginning and 61.2 MB in the end (delta: -11.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.10 ms. Allocated memory is still 90.2 MB. Free memory was 61.2 MB in the beginning and 59.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.92 ms. Allocated memory is still 90.2 MB. Free memory was 59.6 MB in the beginning and 58.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 299.46 ms. Allocated memory is still 90.2 MB. Free memory was 58.4 MB in the beginning and 53.4 MB in the end (delta: 5.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 239.45 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 53.1 MB in the beginning and 88.9 MB in the end (delta: -35.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.23 ms. Allocated memory is still 111.1 MB. Free memory is still 88.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticDOUBLEoperation at line 44, overapproximation of someUnaryDOUBLEoperation at line 32, overapproximation of someBinaryDOUBLEComparisonOperation at line 56. Possible FailurePath: [L22] double _EPS = 1e-6; [L49] double d, r; [L51] d = __VERIFIER_nondet_double() [L18] COND FALSE !(!cond) [L26] double xn, xnp1, residu, lsup, linf; [L27] int i, cond; [L28] COND TRUE Input <= 1.0 [L28] xn = 1.0 [L29] xnp1 = xn [L30] residu = 2.0*_EPS*(xn+xnp1) [L31] lsup = _EPS * (xn+xnp1) [L32] linf = -lsup [L33] cond = ((residu > lsup) || (residu < linf)) [L34] i = 0 VAL [_EPS=1/1000000] [L35] COND FALSE !(\read(cond)) [L44] return 1.0 / xnp1; [L54] r = SqrtR(d) [L20] COND TRUE !(cond) VAL [_EPS=1/1000000] [L20] reach_error() VAL [_EPS=1/1000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=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, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:38:56,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:38:56,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:38:56,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:38:56,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:38:56,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:38:56,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:38:56,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:38:56,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:38:56,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:38:56,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:38:56,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:38:56,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:38:56,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:38:56,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:38:56,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:38:56,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:38:56,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:38:56,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:38:56,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:38:56,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:38:56,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:38:56,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:38:56,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:38:56,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:38:56,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:38:56,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:38:56,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:38:56,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:38:56,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:38:56,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:38:56,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:38:56,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:38:56,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:38:56,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:38:56,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:38:56,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:38:56,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:38:56,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:38:56,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:38:56,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:38:56,547 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 18:38:56,563 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:38:56,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:38:56,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:38:56,564 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:38:56,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:38:56,564 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:38:56,565 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:38:56,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:38:56,565 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:38:56,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:38:56,565 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:38:56,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:38:56,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:38:56,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:38:56,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:38:56,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:38:56,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:38:56,566 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 18:38:56,566 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 18:38:56,566 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:38:56,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:38:56,566 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:38:56,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:38:56,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:38:56,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 18:38:56,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:38:56,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:38:56,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:38:56,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:38:56,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:38:56,567 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 18:38:56,568 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 18:38:56,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:38:56,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:38:56,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:38:56,568 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f60c1e7f1bcabd47cf7b5def116f38f131aaa102 [2020-12-09 18:38:56,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:38:56,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:38:56,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:38:56,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:38:56,824 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:38:56,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2020-12-09 18:38:56,868 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/data/b571a7922/6037c1245f7b4f62a9645cbad45db7bf/FLAG8c0040ba2 [2020-12-09 18:38:57,248 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:38:57,249 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c [2020-12-09 18:38:57,253 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/data/b571a7922/6037c1245f7b4f62a9645cbad45db7bf/FLAG8c0040ba2 [2020-12-09 18:38:57,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/data/b571a7922/6037c1245f7b4f62a9645cbad45db7bf [2020-12-09 18:38:57,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:38:57,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:38:57,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:38:57,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:38:57,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:38:57,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b8600d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57, skipping insertion in model container [2020-12-09 18:38:57,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:38:57,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:38:57,381 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2020-12-09 18:38:57,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:38:57,405 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:38:57,414 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/sv-benchmarks/c/float-benchs/sqrt_Householder_interval.c[831,844] [2020-12-09 18:38:57,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:38:57,431 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:38:57,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57 WrapperNode [2020-12-09 18:38:57,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:38:57,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:38:57,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:38:57,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:38:57,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:38:57,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:38:57,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:38:57,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:38:57,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (1/1) ... [2020-12-09 18:38:57,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:38:57,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:38:57,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:38:57,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:38:57,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:38:57,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 18:38:57,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:38:57,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:38:57,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:39:06,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:39:06,462 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 18:39:06,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:39:06 BoogieIcfgContainer [2020-12-09 18:39:06,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:39:06,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:39:06,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:39:06,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:39:06,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:38:57" (1/3) ... [2020-12-09 18:39:06,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c75e0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:39:06, skipping insertion in model container [2020-12-09 18:39:06,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:38:57" (2/3) ... [2020-12-09 18:39:06,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c75e0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:39:06, skipping insertion in model container [2020-12-09 18:39:06,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:39:06" (3/3) ... [2020-12-09 18:39:06,471 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2020-12-09 18:39:06,484 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:39:06,486 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 18:39:06,493 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 18:39:06,516 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:39:06,516 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:39:06,517 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:39:06,517 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:39:06,517 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:39:06,517 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:39:06,517 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:39:06,517 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:39:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-09 18:39:06,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:39:06,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:06,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:06,530 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:39:06,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:06,536 INFO L82 PathProgramCache]: Analyzing trace with hash 334453616, now seen corresponding path program 1 times [2020-12-09 18:39:06,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 18:39:06,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573493271] [2020-12-09 18:39:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 18:39:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 18:39:07,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:39:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:39:07,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 18:39:07,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573493271] [2020-12-09 18:39:07,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:07,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:39:07,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125481768] [2020-12-09 18:39:07,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 18:39:07,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 18:39:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 18:39:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:39:07,823 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-09 18:39:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:07,833 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-12-09 18:39:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 18:39:07,834 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-09 18:39:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:07,840 INFO L225 Difference]: With dead ends: 29 [2020-12-09 18:39:07,840 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 18:39:07,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:39:07,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 18:39:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-09 18:39:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 18:39:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-09 18:39:07,862 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2020-12-09 18:39:07,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:07,863 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-09 18:39:07,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 18:39:07,863 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-09 18:39:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:39:07,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:07,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:08,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 18:39:08,065 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:39:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1014511986, now seen corresponding path program 1 times [2020-12-09 18:39:08,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 18:39:08,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152744655] [2020-12-09 18:39:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 18:39:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:09,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 18:39:09,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:39:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:39:09,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 18:39:09,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152744655] [2020-12-09 18:39:09,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:09,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:39:09,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483910752] [2020-12-09 18:39:09,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:39:09,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 18:39:09,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:39:09,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:39:09,739 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-12-09 18:39:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:21,951 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-09 18:39:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:39:21,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 18:39:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:21,953 INFO L225 Difference]: With dead ends: 19 [2020-12-09 18:39:21,953 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 18:39:21,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:39:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 18:39:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 18:39:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 18:39:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-09 18:39:21,957 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-09 18:39:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:21,957 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-09 18:39:21,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:39:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-09 18:39:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:39:21,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:21,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:22,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 18:39:22,160 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:39:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:22,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1505447948, now seen corresponding path program 1 times [2020-12-09 18:39:22,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 18:39:22,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561220740] [2020-12-09 18:39:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 18:39:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:28,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 18:39:28,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:39:28,636 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 18:39:28,855 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 18:39:29,132 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 18:39:31,318 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))) (and (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (= c_ULTIMATE.start_SqrtR_~xn~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.leq ULTIMATE.start_SqrtR_~Input .cse0))))) (= c_currentRoundingMode roundNearestTiesToEven) (= c_~_EPS~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)))) is different from false [2020-12-09 18:39:31,344 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 18:39:31,345 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 18:39:34,525 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (= (_ bv1 32) c_ULTIMATE.start_SqrtR_~cond~0)) (.cse4 (= c_currentRoundingMode roundNearestTiesToEven))) (or (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 ULTIMATE.start_SqrtR_~Input))) (and (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse1 (fp.add c_currentRoundingMode .cse2 c_ULTIMATE.start_SqrtR_~xnp1~0))) (fp.gt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse0) .cse1) (fp.mul c_currentRoundingMode .cse0 .cse1))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse3)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 .cse2))))) .cse4 .cse5) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse9 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.div c_currentRoundingMode .cse9 ULTIMATE.start_SqrtR_~Input))) (and (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (let ((.cse6 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse7 (fp.add c_currentRoundingMode .cse8 c_ULTIMATE.start_SqrtR_~xnp1~0))) (fp.lt (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse6) .cse7) (fp.neg (fp.mul c_currentRoundingMode .cse6 .cse7)))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse9)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 .cse8))))) .cse4 .cse5) (and .cse4 (= (_ bv0 32) c_ULTIMATE.start_SqrtR_~cond~0) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse12 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse13 (fp.div c_currentRoundingMode .cse12 ULTIMATE.start_SqrtR_~Input))) (let ((.cse14 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse15 (fp.add c_currentRoundingMode .cse13 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse10 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse14) .cse15)) (.cse11 (fp.mul c_currentRoundingMode .cse14 .cse15))) (and (not (fp.gt .cse10 .cse11)) (not (fp.lt .cse10 (fp.neg .cse11))) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse12)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 .cse13)))))))))) is different from false [2020-12-09 18:39:36,773 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.div c_currentRoundingMode .cse2 ULTIMATE.start_SqrtR_~Input))) (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse5 (fp.add c_currentRoundingMode .cse3 c_ULTIMATE.start_SqrtR_~xnp1~0))) (let ((.cse0 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse4) .cse5)) (.cse1 (fp.mul c_currentRoundingMode .cse4 .cse5))) (and (not (fp.gt .cse0 .cse1)) (not (fp.lt .cse0 (fp.neg .cse1))) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse2)) (= c_ULTIMATE.start_SqrtR_~xnp1~0 .cse3)))))))) is different from false [2020-12-09 18:39:39,161 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (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 (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10.0))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= |c_ULTIMATE.start_SqrtR_#res| (fp.div c_currentRoundingMode .cse0 .cse1)) (not (fp.lt .cse2 (fp.neg .cse3))) (not (fp.gt .cse2 .cse3)) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse0))))))))) is different from false [2020-12-09 18:39:39,193 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 18:39:41,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 18:39:59,035 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 ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse3 (fp.div roundNearestTiesToEven .cse2 ULTIMATE.start_SqrtR_~Input))) (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 (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.lt .cse0 (fp.neg .cse1))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse2)) (not (fp.gt .cse0 .cse1)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (not (fp.geq (fp.div roundNearestTiesToEven .cse2 .cse3) ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0)))))))))) .cse6) (and (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse9 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse10 (fp.div roundNearestTiesToEven .cse9 ULTIMATE.start_SqrtR_~Input))) (let ((.cse11 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse12 (fp.add roundNearestTiesToEven .cse10 .cse10))) (let ((.cse7 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse11) .cse12)) (.cse8 (fp.mul roundNearestTiesToEven .cse11 .cse12))) (and (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.lt .cse7 (fp.neg .cse8))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse9)) (not (fp.gt .cse7 .cse8)) (not (fp.leq (fp.div roundNearestTiesToEven .cse9 .cse10) ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)))))))) .cse6) (and (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)) (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse16 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse19 (fp.div roundNearestTiesToEven .cse16 ULTIMATE.start_SqrtR_~Input))) (let ((.cse17 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse18 (fp.add roundNearestTiesToEven .cse19 .cse19))) (let ((.cse13 (fp.div roundNearestTiesToEven .cse16 .cse19)) (.cse14 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse17) .cse18)) (.cse15 (fp.mul roundNearestTiesToEven .cse17 .cse18))) (and (fp.geq .cse13 ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0))) (fp.leq .cse13 ((_ to_fp 11 53) roundNearestTiesToEven 5.0)) (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.lt .cse14 (fp.neg .cse15))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse16)) (not (fp.gt .cse14 .cse15)) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0))))))))))) is different from false [2020-12-09 18:40:11,748 WARN L838 $PredicateComparison]: unable to prove that (or (exists ((ULTIMATE.start_SqrtR_~Input (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse3 (fp.div roundNearestTiesToEven .cse2 ULTIMATE.start_SqrtR_~Input))) (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 (fp.geq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.lt .cse0 (fp.neg .cse1))) (not (fp.leq ULTIMATE.start_SqrtR_~Input .cse2)) (not (fp.gt .cse0 .cse1)) (not (fp.leq (fp.div roundNearestTiesToEven .cse2 .cse3) ((_ to_fp 11 53) roundNearestTiesToEven 5.0))) (fp.leq ULTIMATE.start_SqrtR_~Input ((_ to_fp 11 53) roundNearestTiesToEven 20.0)))))))) (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse8 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse9 (fp.div roundNearestTiesToEven .cse8 v_prenex_1))) (let ((.cse10 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 1000000.0))) (.cse11 (fp.add roundNearestTiesToEven .cse9 .cse9))) (let ((.cse6 (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 2.0) .cse10) .cse11)) (.cse7 (fp.mul roundNearestTiesToEven .cse10 .cse11))) (and (fp.geq v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10.0))) (not (fp.gt .cse6 .cse7)) (not (fp.leq v_prenex_1 .cse8)) (not (fp.lt .cse6 (fp.neg .cse7))) (fp.leq v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (not (fp.geq (fp.div roundNearestTiesToEven .cse8 .cse9) ((_ to_fp 11 53) roundNearestTiesToEven (/ 3.0 10.0))))))))))) is different from false [2020-12-09 18:40:13,598 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-09 18:40:13,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561220740] [2020-12-09 18:40:13,600 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-12-09 18:40:13,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1904821116] [2020-12-09 18:40:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt [2020-12-09 18:40:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:40:18,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 18:40:18,027 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@79337ea6 [2020-12-09 18:40:18,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200316964] [2020-12-09 18:40:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_18386a22-6487-4b4b-9cca-121a684c576b/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:45:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:45:31,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 18:45:31,499 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@79337ea6 [2020-12-09 18:45:31,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:45:31,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 18:45:31,500 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-12-09 18:45:31,500 INFO L523 BasicCegarLoop]: Counterexample might be feasible [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2020-12-09 18:45:32,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 cvc4 --incremental --print-success --lang smt [2020-12-09 18:45:32,117 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 18:45:32,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:45:32 BoogieIcfgContainer [2020-12-09 18:45:32,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:45:32,118 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:45:32,118 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:45:32,118 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:45:32,119 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:39:06" (3/4) ... [2020-12-09 18:45:32,120 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 18:45:32,121 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:45:32,121 INFO L168 Benchmark]: Toolchain (without parser) took 394855.39 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 46.9 MB in the beginning and 51.3 MB in the end (delta: -4.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-12-09 18:45:32,122 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 65.0 MB. Free memory is still 48.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:45:32,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.90 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 35.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 18:45:32,123 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.67 ms. Allocated memory is still 65.0 MB. Free memory was 35.8 MB in the beginning and 49.4 MB in the end (delta: -13.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:45:32,123 INFO L168 Benchmark]: Boogie Preprocessor took 21.28 ms. Allocated memory is still 65.0 MB. Free memory was 49.4 MB in the beginning and 47.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:45:32,123 INFO L168 Benchmark]: RCFGBuilder took 8968.81 ms. Allocated memory is still 65.0 MB. Free memory was 47.9 MB in the beginning and 34.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 18:45:32,124 INFO L168 Benchmark]: TraceAbstraction took 385653.26 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 33.7 MB in the beginning and 51.3 MB in the end (delta: -17.6 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2020-12-09 18:45:32,124 INFO L168 Benchmark]: Witness Printer took 2.49 ms. Allocated memory is still 83.9 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:45:32,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 65.0 MB. Free memory is still 48.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 164.90 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 35.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.67 ms. Allocated memory is still 65.0 MB. Free memory was 35.8 MB in the beginning and 49.4 MB in the end (delta: -13.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.28 ms. Allocated memory is still 65.0 MB. Free memory was 49.4 MB in the beginning and 47.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 8968.81 ms. Allocated memory is still 65.0 MB. Free memory was 47.9 MB in the beginning and 34.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 385653.26 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 33.7 MB in the beginning and 51.3 MB in the end (delta: -17.6 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * Witness Printer took 2.49 ms. Allocated memory is still 83.9 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] double _EPS = 1e-6; [L49] double d, r; [L51] d = __VERIFIER_nondet_double() [L18] COND FALSE !(!cond) [L26] double xn, xnp1, residu, lsup, linf; [L27] int i, cond; [L28] COND FALSE !(Input <= 1.0) [L28] xn = 1.0/Input [L29] xnp1 = xn [L30] residu = 2.0*_EPS*(xn+xnp1) [L31] lsup = _EPS * (xn+xnp1) [L32] linf = -lsup [L33] cond = ((residu > lsup) || (residu < linf)) [L34] i = 0 [L35] COND FALSE !(\read(cond)) [L44] return 1.0 / xnp1; [L54] r = SqrtR(d) [L20] COND TRUE !(cond) [L20] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 385.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 12.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 1 SDslu, 13 SDs, 0 SdLazy, 11 SolverSat, 0 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 11.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 670 SizeOfPredicates, 7 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...