./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI --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 e0a18ef05fc68655f6745bf4a502e0079c3ee8f2ad8ce0a20fedaec28a3ae221 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:41:41,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:41:41,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:41:41,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:41:41,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:41:41,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:41:41,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:41:41,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:41:41,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:41:41,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:41:41,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:41:41,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:41:41,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:41:41,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:41:41,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:41:41,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:41:41,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:41:41,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:41:41,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:41:41,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:41:41,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:41:41,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:41:41,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:41:41,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:41:41,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:41:41,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:41:41,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:41:41,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:41:41,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:41:41,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:41:41,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:41:41,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:41:41,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:41:41,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:41:41,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:41:41,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:41:41,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:41:41,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:41:41,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:41:41,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:41:41,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:41:41,811 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:41:41,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:41:41,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:41:41,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:41:41,853 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:41:41,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:41:41,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:41:41,855 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:41:41,855 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:41:41,855 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:41:41,855 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:41:41,857 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:41:41,857 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:41:41,857 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:41:41,857 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:41:41,858 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:41:41,858 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:41:41,858 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:41:41,858 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:41:41,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:41:41,860 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:41:41,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:41:41,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:41:41,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:41:41,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:41:41,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:41:41,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:41:41,861 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:41:41,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:41:41,862 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:41:41,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:41:41,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:41:41,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:41:41,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:41,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:41:41,863 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:41:41,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:41:41,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:41:41,864 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:41:41,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:41:41,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:41:41,865 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:41:41,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0a18ef05fc68655f6745bf4a502e0079c3ee8f2ad8ce0a20fedaec28a3ae221 [2022-11-03 02:41:42,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:41:42,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:41:42,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:41:42,191 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:41:42,192 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:41:42,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2022-11-03 02:41:42,265 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/data/7fbca955e/a61cb4e05350407b84f5c847c16f471a/FLAGe860a2a24 [2022-11-03 02:41:42,836 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:41:42,837 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2022-11-03 02:41:42,845 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/data/7fbca955e/a61cb4e05350407b84f5c847c16f471a/FLAGe860a2a24 [2022-11-03 02:41:43,167 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/data/7fbca955e/a61cb4e05350407b84f5c847c16f471a [2022-11-03 02:41:43,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:41:43,172 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:41:43,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:43,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:41:43,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:41:43,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572fcbcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43, skipping insertion in model container [2022-11-03 02:41:43,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:41:43,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:41:43,421 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c[855,868] [2022-11-03 02:41:43,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:43,474 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:41:43,490 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c[855,868] [2022-11-03 02:41:43,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:43,536 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:41:43,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43 WrapperNode [2022-11-03 02:41:43,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:43,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:43,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:41:43,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:41:43,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,585 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2022-11-03 02:41:43,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:43,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:41:43,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:41:43,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:41:43,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,631 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:41:43,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:41:43,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:41:43,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:41:43,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (1/1) ... [2022-11-03 02:41:43,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:43,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:43,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:41:43,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:41:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:41:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:41:43,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:41:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:41:43,824 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:41:43,826 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:41:44,027 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:41:44,107 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:41:44,108 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:41:44,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:44 BoogieIcfgContainer [2022-11-03 02:41:44,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:41:44,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:41:44,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:41:44,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:41:44,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:41:43" (1/3) ... [2022-11-03 02:41:44,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ab2c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:44, skipping insertion in model container [2022-11-03 02:41:44,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:43" (2/3) ... [2022-11-03 02:41:44,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ab2c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:44, skipping insertion in model container [2022-11-03 02:41:44,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:44" (3/3) ... [2022-11-03 02:41:44,131 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_pseudoconstant.c [2022-11-03 02:41:44,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:41:44,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:41:44,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:41:44,249 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@65b06055, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:41:44,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:41:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:41:44,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:44,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:41:44,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:44,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash 88968804, now seen corresponding path program 1 times [2022-11-03 02:41:44,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:44,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926877181] [2022-11-03 02:41:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:44,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:41:44,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:41:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:41:44,503 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:41:44,505 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:41:44,507 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:41:44,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:41:44,514 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:41:44,520 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:41:44,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:41:44 BoogieIcfgContainer [2022-11-03 02:41:44,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:41:44,555 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:41:44,555 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:41:44,556 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:41:44,556 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:44" (3/4) ... [2022-11-03 02:41:44,564 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:41:44,565 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:41:44,567 INFO L158 Benchmark]: Toolchain (without parser) took 1393.97ms. Allocated memory is still 111.1MB. Free memory was 76.0MB in the beginning and 55.2MB in the end (delta: 20.8MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2022-11-03 02:41:44,568 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory was 92.8MB in the beginning and 92.6MB in the end (delta: 170.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:41:44,569 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.58ms. Allocated memory is still 111.1MB. Free memory was 75.8MB in the beginning and 86.6MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:41:44,570 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.24ms. Allocated memory is still 111.1MB. Free memory was 86.6MB in the beginning and 85.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:41:44,571 INFO L158 Benchmark]: Boogie Preprocessor took 53.80ms. Allocated memory is still 111.1MB. Free memory was 85.0MB in the beginning and 84.0MB in the end (delta: 936.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:41:44,576 INFO L158 Benchmark]: RCFGBuilder took 468.75ms. Allocated memory is still 111.1MB. Free memory was 84.0MB in the beginning and 70.7MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:41:44,577 INFO L158 Benchmark]: TraceAbstraction took 439.81ms. Allocated memory is still 111.1MB. Free memory was 69.9MB in the beginning and 55.6MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:41:44,578 INFO L158 Benchmark]: Witness Printer took 10.55ms. Allocated memory is still 111.1MB. Free memory was 55.6MB in the beginning and 55.2MB in the end (delta: 426.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:41:44,587 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory was 92.8MB in the beginning and 92.6MB in the end (delta: 170.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.58ms. Allocated memory is still 111.1MB. Free memory was 75.8MB in the beginning and 86.6MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.24ms. Allocated memory is still 111.1MB. Free memory was 86.6MB in the beginning and 85.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.80ms. Allocated memory is still 111.1MB. Free memory was 85.0MB in the beginning and 84.0MB in the end (delta: 936.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 468.75ms. Allocated memory is still 111.1MB. Free memory was 84.0MB in the beginning and 70.7MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 439.81ms. Allocated memory is still 111.1MB. Free memory was 69.9MB in the beginning and 55.6MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 10.55ms. Allocated memory is still 111.1MB. Free memory was 55.6MB in the beginning and 55.2MB in the end (delta: 426.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 59. Possible FailurePath: [L22] double _EPS = 1e-6; [L49] double d, dd, r; [L50] double epsilon = 1e-8; [L52] d = 1. VAL [_EPS=1/1000000, d=1, epsilon=1/100000000] [L52] COND TRUE d <= 20. [L54] dd = __VERIFIER_nondet_double() [L55] CALL assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) [L18] COND FALSE !(!cond) [L55] RET assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) [L57] CALL, EXPR SqrtR(dd) [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 VAL [\old(Input)=54, _EPS=1/1000000, cond=0, i=0, Input=54, xn=1, xn=1] [L35] COND FALSE !(\read(cond)) [L44] return 1.0 / xnp1; [L57] RET, EXPR SqrtR(dd) [L57] r = SqrtR(dd) [L59] CALL __VERIFIER_assert(r >= 0.9 && r <= 5.) [L20] COND TRUE !(cond) VAL [\old(cond)=0, _EPS=1/1000000, cond=0] [L20] reach_error() VAL [\old(cond)=0, _EPS=1/1000000, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=0, InterpolantAutomatonStates: 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:41:44,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI --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 e0a18ef05fc68655f6745bf4a502e0079c3ee8f2ad8ce0a20fedaec28a3ae221 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:41:47,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:41:47,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:41:47,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:41:47,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:41:47,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:41:47,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:41:47,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:41:47,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:41:47,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:41:47,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:41:47,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:41:47,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:41:47,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:41:47,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:41:47,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:41:47,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:41:47,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:41:47,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:41:47,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:41:47,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:41:47,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:41:47,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:41:47,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:41:47,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:41:47,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:41:47,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:41:47,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:41:47,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:41:47,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:41:47,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:41:47,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:41:47,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:41:47,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:41:47,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:41:47,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:41:47,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:41:47,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:41:47,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:41:47,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:41:47,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:41:47,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:41:47,272 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:41:47,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:41:47,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:41:47,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:41:47,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:41:47,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:41:47,274 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:41:47,275 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:41:47,275 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:41:47,275 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:41:47,275 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:41:47,276 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:41:47,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:41:47,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:41:47,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:41:47,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:41:47,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:41:47,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:41:47,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:41:47,278 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:41:47,278 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:41:47,279 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:41:47,279 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:41:47,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:41:47,279 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:41:47,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:41:47,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:41:47,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:41:47,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:41:47,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:47,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:41:47,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:41:47,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:41:47,281 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:41:47,281 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:47,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:41:47,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:41:47,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:41:47,282 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_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0a18ef05fc68655f6745bf4a502e0079c3ee8f2ad8ce0a20fedaec28a3ae221 [2022-11-03 02:41:47,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:41:47,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:41:47,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:41:47,735 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:41:47,736 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:41:47,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2022-11-03 02:41:47,822 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/data/2a35611c5/ae84f8d873d446e296766cbcb9be5c86/FLAGbe50705f2 [2022-11-03 02:41:48,437 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:41:48,440 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2022-11-03 02:41:48,448 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/data/2a35611c5/ae84f8d873d446e296766cbcb9be5c86/FLAGbe50705f2 [2022-11-03 02:41:48,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/data/2a35611c5/ae84f8d873d446e296766cbcb9be5c86 [2022-11-03 02:41:48,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:41:48,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:41:48,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:48,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:41:48,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:41:48,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:48" (1/1) ... [2022-11-03 02:41:48,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6511464c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:48, skipping insertion in model container [2022-11-03 02:41:48,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:48" (1/1) ... [2022-11-03 02:41:48,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:41:48,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:41:48,966 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c[855,868] [2022-11-03 02:41:48,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:49,021 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:41:49,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c[855,868] [2022-11-03 02:41:49,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:49,081 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:41:49,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49 WrapperNode [2022-11-03 02:41:49,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:49,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:49,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:41:49,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:41:49,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,134 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2022-11-03 02:41:49,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:49,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:41:49,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:41:49,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:41:49,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,164 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:41:49,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:41:49,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:41:49,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:41:49,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (1/1) ... [2022-11-03 02:41:49,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:49,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:49,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:41:49,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:41:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:41:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:41:49,345 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:41:49,348 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:41:59,814 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:41:59,822 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:41:59,822 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:41:59,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:59 BoogieIcfgContainer [2022-11-03 02:41:59,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:41:59,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:41:59,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:41:59,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:41:59,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:41:48" (1/3) ... [2022-11-03 02:41:59,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb0ecbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:59, skipping insertion in model container [2022-11-03 02:41:59,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:49" (2/3) ... [2022-11-03 02:41:59,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb0ecbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:59, skipping insertion in model container [2022-11-03 02:41:59,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:59" (3/3) ... [2022-11-03 02:41:59,851 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_pseudoconstant.c [2022-11-03 02:41:59,887 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:41:59,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:41:59,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:41:59,992 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@599145c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:42:00,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:42:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:42:00,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:00,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:00,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:00,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1569195288, now seen corresponding path program 1 times [2022-11-03 02:42:00,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:00,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135304508] [2022-11-03 02:42:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:00,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:00,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:00,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:00,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:42:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:01,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:42:01,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:01,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:01,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:01,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135304508] [2022-11-03 02:42:01,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135304508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:01,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:01,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:42:01,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772064936] [2022-11-03 02:42:01,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:01,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:42:01,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:01,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:42:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:42:01,984 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:02,001 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-11-03 02:42:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:42:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 02:42:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:02,013 INFO L225 Difference]: With dead ends: 36 [2022-11-03 02:42:02,013 INFO L226 Difference]: Without dead ends: 15 [2022-11-03 02:42:02,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:42:02,021 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:02,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:42:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-03 02:42:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-03 02:42:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-03 02:42:02,057 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2022-11-03 02:42:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:02,057 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-03 02:42:02,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-03 02:42:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:42:02,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:02,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:02,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:42:02,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:02,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:02,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:02,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2049407722, now seen corresponding path program 1 times [2022-11-03 02:42:02,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:02,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458756630] [2022-11-03 02:42:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:02,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:02,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:02,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:02,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:42:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:42:04,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:05,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:05,138 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:05,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458756630] [2022-11-03 02:42:05,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458756630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:05,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:05,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:05,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069224470] [2022-11-03 02:42:05,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:05,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:05,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:05,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:05,142 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:08,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:10,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:12,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:14,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:16,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:19,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:22,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:24,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:25,466 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-11-03 02:42:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:42:25,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 02:42:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:25,468 INFO L225 Difference]: With dead ends: 34 [2022-11-03 02:42:25,468 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 02:42:25,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:42:25,471 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:25,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 20.1s Time] [2022-11-03 02:42:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 02:42:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-03 02:42:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-03 02:42:25,477 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2022-11-03 02:42:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:25,492 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-03 02:42:25,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:25,493 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-03 02:42:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:42:25,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:25,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:25,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:25,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:25,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash -274400360, now seen corresponding path program 1 times [2022-11-03 02:42:25,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:25,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58347947] [2022-11-03 02:42:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:25,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:25,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:25,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:25,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:42:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:29,437 WARN L261 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:42:29,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:45,334 WARN L833 $PredicateComparison]: unable to prove that (and (= ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)) c_~_EPS~0) (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (= |c_ULTIMATE.start_SqrtR_~xn~0#1| (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|)) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| (fp.add c_currentRoundingMode .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-11-03 02:44:16,247 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse6 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.add c_currentRoundingMode .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (.cse2 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse6))) (or (and (or (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse1 (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (= .cse1 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|) (exists ((|ULTIMATE.start_SqrtR_~linf~0#1| (_ FloatingPoint 11 53))) (fp.lt (fp.mul c_currentRoundingMode .cse2 (fp.add c_currentRoundingMode .cse1 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|)) |ULTIMATE.start_SqrtR_~linf~0#1|)) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse3)))) (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse4 (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (= .cse4 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|) (let ((.cse5 (fp.add c_currentRoundingMode .cse4 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|))) (fp.gt (fp.mul c_currentRoundingMode .cse2 .cse5) (fp.mul c_currentRoundingMode .cse6 .cse5))) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse3))))) (= |c_ULTIMATE.start_SqrtR_~cond~0#1| (_ bv1 32))) (and (exists ((|ULTIMATE.start_SqrtR_~linf~0#1| (_ FloatingPoint 11 53)) (|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse7 (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))) (let ((.cse9 (fp.add c_currentRoundingMode .cse7 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|))) (let ((.cse8 (fp.mul c_currentRoundingMode .cse2 .cse9))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (= .cse7 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|) (not (fp.gt .cse8 (fp.mul c_currentRoundingMode .cse6 .cse9))) (not (fp.lt .cse8 |ULTIMATE.start_SqrtR_~linf~0#1|)) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse3)))))) (= |c_ULTIMATE.start_SqrtR_~cond~0#1| (_ bv0 32)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-11-03 02:44:21,336 WARN L234 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:44:26,338 WARN L234 SmtUtils]: Spent 5.00s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:44:31,421 WARN L234 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:44:43,591 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_SqrtR_~linf~0#1| (_ FloatingPoint 11 53)) (|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))) (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse4 (fp.add c_currentRoundingMode .cse1 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|))) (let ((.cse2 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse3) .cse4))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (= .cse1 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|) (not (fp.gt .cse2 (fp.mul c_currentRoundingMode .cse3 .cse4))) (not (fp.lt .cse2 |ULTIMATE.start_SqrtR_~linf~0#1|)) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| (fp.add c_currentRoundingMode .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-11-03 02:44:45,715 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_SqrtR_~linf~0#1| (_ FloatingPoint 11 53)) (|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))) (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse4 (fp.add c_currentRoundingMode .cse1 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|))) (let ((.cse2 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse3) .cse4))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (= .cse1 |c_ULTIMATE.start_SqrtR_~xnp1~0#1|) (not (fp.gt .cse2 (fp.mul c_currentRoundingMode .cse3 .cse4))) (not (fp.lt .cse2 |ULTIMATE.start_SqrtR_~linf~0#1|)) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| (fp.add c_currentRoundingMode .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-11-03 02:44:51,296 WARN L234 SmtUtils]: Spent 5.57s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:44:57,174 WARN L234 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:45:03,064 WARN L234 SmtUtils]: Spent 5.89s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:45:09,113 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:45:15,012 WARN L234 SmtUtils]: Spent 5.90s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:45:17,468 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_SqrtR_~linf~0#1| (_ FloatingPoint 11 53)) (|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse2 (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))) (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0))) (.cse4 (fp.add c_currentRoundingMode .cse2 .cse2))) (let ((.cse1 (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 2.0) .cse3) .cse4))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (not (fp.lt .cse1 |ULTIMATE.start_SqrtR_~linf~0#1|)) (= (fp.div c_currentRoundingMode .cse0 .cse2) |c_ULTIMATE.start_SqrtR_#res#1|) (not (fp.gt .cse1 (fp.mul c_currentRoundingMode .cse3 .cse4))) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| (fp.add c_currentRoundingMode .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-11-03 02:45:28,309 WARN L234 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:45:33,749 WARN L234 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:45:39,486 WARN L234 SmtUtils]: Spent 5.74s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:45:45,404 WARN L234 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:45:51,291 WARN L234 SmtUtils]: Spent 5.89s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:45:59,654 WARN L234 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:05,663 WARN L234 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:10,965 WARN L234 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:16,688 WARN L234 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:22,518 WARN L234 SmtUtils]: Spent 5.83s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:30,895 WARN L234 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:36,650 WARN L234 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:42,520 WARN L234 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:48,337 WARN L234 SmtUtils]: Spent 5.82s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:46:54,258 WARN L234 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:47:00,403 WARN L234 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 02:47:02,066 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-03 02:47:02,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:02,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58347947] [2022-11-03 02:47:02,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-11-03 02:47:02,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [320882715] [2022-11-03 02:47:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:02,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:02,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:02,070 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:02,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-11-03 02:47:02,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-03 02:47:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:07,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:47:07,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:07,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2022-11-03 02:47:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163476321] [2022-11-03 02:47:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:07,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:07,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:07,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:07,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:48:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:02,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:48:02,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:02,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2022-11-03 02:48:02,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:48:02,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-03 02:48:02,664 ERROR L170 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2022-11-03 02:48:02,664 INFO L359 BasicCegarLoop]: Counterexample might be feasible [2022-11-03 02:48:02,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:48:02,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:02,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-11-03 02:48:03,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:03,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_654fb6e3-3332-43a0-83d8-b68ea0407294/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:03,275 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-03 02:48:03,278 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:48:03,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:48:03 BoogieIcfgContainer [2022-11-03 02:48:03,290 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:48:03,291 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:48:03,291 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:48:03,292 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:48:03,292 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:59" (3/4) ... [2022-11-03 02:48:03,295 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:48:03,295 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:48:03,296 INFO L158 Benchmark]: Toolchain (without parser) took 374520.92ms. Allocated memory is still 75.5MB. Free memory was 54.0MB in the beginning and 55.4MB in the end (delta: -1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:48:03,296 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 50.3MB. Free memory is still 31.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:48:03,297 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.16ms. Allocated memory is still 75.5MB. Free memory was 53.8MB in the beginning and 58.2MB in the end (delta: -4.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:48:03,297 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.83ms. Allocated memory is still 75.5MB. Free memory was 58.2MB in the beginning and 56.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:48:03,297 INFO L158 Benchmark]: Boogie Preprocessor took 33.43ms. Allocated memory is still 75.5MB. Free memory was 56.4MB in the beginning and 55.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:48:03,298 INFO L158 Benchmark]: RCFGBuilder took 10655.86ms. Allocated memory is still 75.5MB. Free memory was 55.0MB in the beginning and 43.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:48:03,298 INFO L158 Benchmark]: TraceAbstraction took 363462.44ms. Allocated memory is still 75.5MB. Free memory was 42.7MB in the beginning and 55.4MB in the end (delta: -12.7MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. [2022-11-03 02:48:03,298 INFO L158 Benchmark]: Witness Printer took 4.24ms. Allocated memory is still 75.5MB. Free memory is still 55.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:48:03,300 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 50.3MB. Free memory is still 31.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.16ms. Allocated memory is still 75.5MB. Free memory was 53.8MB in the beginning and 58.2MB in the end (delta: -4.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.83ms. Allocated memory is still 75.5MB. Free memory was 58.2MB in the beginning and 56.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.43ms. Allocated memory is still 75.5MB. Free memory was 56.4MB in the beginning and 55.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 10655.86ms. Allocated memory is still 75.5MB. Free memory was 55.0MB in the beginning and 43.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 363462.44ms. Allocated memory is still 75.5MB. Free memory was 42.7MB in the beginning and 55.4MB in the end (delta: -12.7MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. * Witness Printer took 4.24ms. Allocated memory is still 75.5MB. Free memory is still 55.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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, dd, r; [L50] double epsilon = 1e-8; [L52] d = 1. [L52] COND TRUE d <= 20. [L54] dd = __VERIFIER_nondet_double() [L55] CALL assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) [L18] COND FALSE !(!cond) [L55] RET assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) [L57] CALL, EXPR SqrtR(dd) [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; [L57] RET, EXPR SqrtR(dd) [L57] r = SqrtR(dd) [L59] CALL __VERIFIER_assert(r >= 0.9 && r <= 5.) [L20] COND TRUE !(cond) [L20] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 363.3s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 20.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 20.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 54 SdHoareTripleChecker+Invalid, 19.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 22 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20 IncrementalHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 32 mSDtfsCounter, 20 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, InterpolantAutomatonStates: 7, 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, 7.0s SatisfiabilityAnalysisTime, 273.9s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 77 SizeOfPredicates, 7 NumberOfNonLiveVariables, 120 ConjunctsInSsa, 30 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN