./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54d39a6a3598707eb000bd324eee861653a2a39c1655837786308f3da9918a18 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:00:29,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:00:29,867 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:00:29,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:00:29,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:00:29,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:00:29,914 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:00:29,915 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:00:29,916 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:00:29,916 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:00:29,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:00:29,917 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:00:29,918 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:00:29,918 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:00:29,918 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:00:29,919 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:00:29,919 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:00:29,920 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:00:29,920 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:00:29,920 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:00:29,926 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:00:29,927 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:00:29,927 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:00:29,928 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:00:29,928 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:00:29,928 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:00:29,928 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:00:29,929 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:00:29,929 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:00:29,929 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:00:29,929 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:00:29,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:00:29,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:29,930 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:00:29,932 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:00:29,933 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:00:29,934 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:00:29,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:00:29,935 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:00:29,935 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:00:29,935 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:00:29,936 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:00:29,936 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d39a6a3598707eb000bd324eee861653a2a39c1655837786308f3da9918a18 [2024-10-31 22:00:30,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:00:30,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:00:30,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:00:30,405 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:00:30,405 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:00:30,408 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c Unable to find full path for "g++" [2024-10-31 22:00:32,610 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:00:32,798 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:00:32,799 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c [2024-10-31 22:00:32,806 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/data/c0ea5174e/a289be3760964b92bb1a9a994a5c32a0/FLAG2520e1e0e [2024-10-31 22:00:32,820 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/data/c0ea5174e/a289be3760964b92bb1a9a994a5c32a0 [2024-10-31 22:00:32,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:00:32,823 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:00:32,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:32,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:00:32,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:00:32,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:32" (1/1) ... [2024-10-31 22:00:32,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c07f3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:32, skipping insertion in model container [2024-10-31 22:00:32,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:32" (1/1) ... [2024-10-31 22:00:32,861 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:00:33,071 WARN L251 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_8959da97-9837-4b88-91dc-58a33ec3400d/sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c[2369,2382] [2024-10-31 22:00:33,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:33,090 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:00:33,112 WARN L251 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_8959da97-9837-4b88-91dc-58a33ec3400d/sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c[2369,2382] [2024-10-31 22:00:33,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:33,132 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:00:33,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33 WrapperNode [2024-10-31 22:00:33,133 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:33,134 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:33,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:00:33,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:00:33,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,149 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,165 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 97 [2024-10-31 22:00:33,166 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:33,166 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:00:33,167 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:00:33,167 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:00:33,176 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,178 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,189 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:00:33,190 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,190 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,198 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,200 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,201 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,202 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,203 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:00:33,204 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:00:33,205 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:00:33,205 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:00:33,206 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (1/1) ... [2024-10-31 22:00:33,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:33,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:33,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:00:33,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:00:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:00:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:00:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:00:33,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:00:33,348 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:00:33,350 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:00:33,484 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-10-31 22:00:33,484 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:00:33,500 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:00:33,501 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-31 22:00:33,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:33 BoogieIcfgContainer [2024-10-31 22:00:33,501 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:00:33,506 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:00:33,506 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:00:33,510 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:00:33,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:00:32" (1/3) ... [2024-10-31 22:00:33,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b03b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:33, skipping insertion in model container [2024-10-31 22:00:33,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:33" (2/3) ... [2024-10-31 22:00:33,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b03b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:33, skipping insertion in model container [2024-10-31 22:00:33,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:33" (3/3) ... [2024-10-31 22:00:33,513 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_constant.c.p+cfa-reducer.c [2024-10-31 22:00:33,527 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:00:33,527 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:00:33,586 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:00:33,591 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@35f71171, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:00:33,592 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:00:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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) [2024-10-31 22:00:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 22:00:33,603 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:33,604 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:33,605 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:33,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2001896247, now seen corresponding path program 1 times [2024-10-31 22:00:33,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:33,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310068920] [2024-10-31 22:00:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:33,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:34,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:34,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310068920] [2024-10-31 22:00:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310068920] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:34,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:34,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:00:34,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385881911] [2024-10-31 22:00:34,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:34,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:34,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:34,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:34,049 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-10-31 22:00:34,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:34,101 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-10-31 22:00:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:34,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2024-10-31 22:00:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:34,113 INFO L225 Difference]: With dead ends: 31 [2024-10-31 22:00:34,113 INFO L226 Difference]: Without dead ends: 23 [2024-10-31 22:00:34,116 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:34,120 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:34,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:00:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-31 22:00:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-31 22:00:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2024-10-31 22:00:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2024-10-31 22:00:34,161 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2024-10-31 22:00:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:34,163 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2024-10-31 22:00:34,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-10-31 22:00:34,163 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2024-10-31 22:00:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 22:00:34,165 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:34,165 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:34,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:00:34,166 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:34,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:34,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1984885586, now seen corresponding path program 1 times [2024-10-31 22:00:34,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:34,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394300082] [2024-10-31 22:00:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:00:34,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:00:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:00:34,272 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:00:34,278 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:00:34,280 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 22:00:34,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:00:34,297 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-31 22:00:34,340 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 22:00:34,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 10:00:34 BoogieIcfgContainer [2024-10-31 22:00:34,345 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 22:00:34,346 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-31 22:00:34,347 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-31 22:00:34,347 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-31 22:00:34,348 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:33" (3/4) ... [2024-10-31 22:00:34,352 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-10-31 22:00:34,353 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-31 22:00:34,354 INFO L158 Benchmark]: Toolchain (without parser) took 1531.03ms. Allocated memory was 155.2MB in the beginning and 199.2MB in the end (delta: 44.0MB). Free memory was 115.8MB in the beginning and 155.6MB in the end (delta: -39.8MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2024-10-31 22:00:34,356 INFO L158 Benchmark]: CDTParser took 3.85ms. Allocated memory is still 96.5MB. Free memory is still 44.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-31 22:00:34,357 INFO L158 Benchmark]: CACSL2BoogieTranslator took 308.52ms. Allocated memory is still 155.2MB. Free memory was 115.4MB in the beginning and 102.3MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-31 22:00:34,358 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.83ms. Allocated memory is still 155.2MB. Free memory was 102.3MB in the beginning and 100.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-31 22:00:34,359 INFO L158 Benchmark]: Boogie Preprocessor took 37.36ms. Allocated memory is still 155.2MB. Free memory was 100.7MB in the beginning and 98.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-31 22:00:34,360 INFO L158 Benchmark]: RCFGBuilder took 297.30ms. Allocated memory is still 155.2MB. Free memory was 98.6MB in the beginning and 87.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-31 22:00:34,363 INFO L158 Benchmark]: TraceAbstraction took 839.69ms. Allocated memory was 155.2MB in the beginning and 199.2MB in the end (delta: 44.0MB). Free memory was 87.3MB in the beginning and 156.6MB in the end (delta: -69.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-31 22:00:34,364 INFO L158 Benchmark]: Witness Printer took 7.44ms. Allocated memory is still 199.2MB. Free memory was 156.6MB in the beginning and 155.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-31 22:00:34,366 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.85ms. Allocated memory is still 96.5MB. Free memory is still 44.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 308.52ms. Allocated memory is still 155.2MB. Free memory was 115.4MB in the beginning and 102.3MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.83ms. Allocated memory is still 155.2MB. Free memory was 102.3MB in the beginning and 100.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.36ms. Allocated memory is still 155.2MB. Free memory was 100.7MB in the beginning and 98.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 297.30ms. Allocated memory is still 155.2MB. Free memory was 98.6MB in the beginning and 87.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 839.69ms. Allocated memory was 155.2MB in the beginning and 199.2MB in the end (delta: 44.0MB). Free memory was 87.3MB in the beginning and 156.6MB in the end (delta: -69.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 7.44ms. Allocated memory is still 199.2MB. Free memory was 156.6MB in the beginning and 155.6MB in the end (delta: 1.0MB). 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: 101]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 88, overapproximation of someBinaryArithmeticDOUBLEoperation at line 85, overapproximation of someUnaryDOUBLEoperation at line 42. Possible FailurePath: [L1] int __return_main; [L11] double _EPS = 0.0000010; [L14] double __return_125; VAL [_EPS=1/1000000, __return_125=0, __return_main=0] [L17] double main__d; [L18] double main__r; [L19] main__d = 1.0 VAL [_EPS=1/1000000, __return_125=0, __return_main=0, main__d=1] [L21] COND TRUE main__d <= 20.0 [L24] double __tmp_1; [L25] __tmp_1 = main__d [L26] double SqrtR__Input; [L27] SqrtR__Input = __tmp_1 [L28] double SqrtR__xn; [L29] double SqrtR__xnp1; [L30] double SqrtR__residu; [L31] double SqrtR__lsup; [L32] double SqrtR__linf; [L33] int SqrtR__i; [L34] int SqrtR__cond; VAL [_EPS=1/1000000, __return_125=0, __return_main=0] [L35] COND FALSE !(SqrtR__Input <= 1.0) [L139] SqrtR__xn = 1.0 / SqrtR__Input VAL [_EPS=1/1000000, __return_125=0, __return_main=0] [L39] SqrtR__xnp1 = SqrtR__xn [L40] SqrtR__residu = (2.0 * _EPS) * (SqrtR__xn + SqrtR__xnp1) [L41] SqrtR__lsup = _EPS * (SqrtR__xn + SqrtR__xnp1) [L42] SqrtR__linf = -SqrtR__lsup [L43] int SqrtR____CPAchecker_TMP_0; VAL [_EPS=1/1000000, __return_125=0, __return_main=0] [L44] COND FALSE !(SqrtR__residu > SqrtR__lsup) VAL [_EPS=1/1000000, __return_125=0, __return_main=0] [L126] COND FALSE !(SqrtR__residu < SqrtR__linf) [L132] SqrtR____CPAchecker_TMP_0 = 0 VAL [SqrtR____CPAchecker_TMP_0=0, _EPS=1/1000000, __return_125=0, __return_main=0] [L49] SqrtR__cond = SqrtR____CPAchecker_TMP_0 [L50] SqrtR__i = 0 VAL [SqrtR__cond=0, SqrtR__i=0, _EPS=1/1000000, __return_125=0, __return_main=0] [L52] COND FALSE !(!(SqrtR__cond == 0)) [L85] __return_125 = 1.0 / SqrtR__xnp1 [L86] main__r = __return_125 [L87] int main____CPAchecker_TMP_0; VAL [SqrtR__i=0, _EPS=1/1000000, __return_125=53, __return_main=0] [L88] COND FALSE !(main__r >= 1.0) VAL [SqrtR__i=0, _EPS=1/1000000, __return_125=53, __return_main=0] [L114] main____CPAchecker_TMP_0 = 0 VAL [SqrtR__i=0, _EPS=1/1000000, __return_125=53, __return_main=0, main____CPAchecker_TMP_0=0] [L95] int __tmp_2; [L96] __tmp_2 = main____CPAchecker_TMP_0 [L97] int __VERIFIER_assert__cond; [L98] __VERIFIER_assert__cond = __tmp_2 VAL [SqrtR__i=0, _EPS=1/1000000, __VERIFIER_assert__cond=0, __return_125=53, __return_main=0] [L99] COND TRUE __VERIFIER_assert__cond == 0 VAL [SqrtR__i=0, _EPS=1/1000000, __return_125=53, __return_main=0] [L101] reach_error() VAL [SqrtR__i=0, _EPS=1/1000000, __return_125=53, __return_main=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 82 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 52 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 30 mSDtfsCounter, 13 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 17 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2024-10-31 22:00:34,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (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_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54d39a6a3598707eb000bd324eee861653a2a39c1655837786308f3da9918a18 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:00:36,796 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:00:36,893 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 22:00:36,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:00:36,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:00:36,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:00:36,937 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:00:36,937 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:00:36,938 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:00:36,940 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:00:36,940 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:00:36,941 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:00:36,941 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:00:36,942 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:00:36,944 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:00:36,945 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:00:36,945 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:00:36,946 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:00:36,946 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:00:36,950 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:00:36,950 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:00:36,951 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:00:36,951 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:00:36,951 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:00:36,952 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 22:00:36,952 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:00:36,952 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 22:00:36,953 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:00:36,953 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:00:36,953 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:00:36,954 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:00:36,954 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:00:36,954 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:00:36,955 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:00:36,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:36,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:00:36,956 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:00:36,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:00:36,956 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 22:00:36,966 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 22:00:36,968 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:00:36,968 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:00:36,968 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:00:36,968 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:00:36,969 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 22:00:36,969 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d39a6a3598707eb000bd324eee861653a2a39c1655837786308f3da9918a18 [2024-10-31 22:00:37,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:00:37,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:00:37,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:00:37,427 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:00:37,427 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:00:37,429 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c Unable to find full path for "g++" [2024-10-31 22:00:39,686 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:00:39,965 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:00:39,966 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c [2024-10-31 22:00:39,974 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/data/e8bd8f841/d07ba51512104d80b22158123a79c5e3/FLAG3fba37329 [2024-10-31 22:00:40,330 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/data/e8bd8f841/d07ba51512104d80b22158123a79c5e3 [2024-10-31 22:00:40,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:00:40,334 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:00:40,337 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:40,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:00:40,345 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:00:40,348 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,349 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76644326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40, skipping insertion in model container [2024-10-31 22:00:40,349 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,397 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:00:40,677 WARN L251 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_8959da97-9837-4b88-91dc-58a33ec3400d/sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c[2369,2382] [2024-10-31 22:00:40,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:40,719 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:00:40,756 WARN L251 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_8959da97-9837-4b88-91dc-58a33ec3400d/sv-benchmarks/c/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c[2369,2382] [2024-10-31 22:00:40,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:40,795 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:00:40,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40 WrapperNode [2024-10-31 22:00:40,796 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:40,797 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:40,798 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:00:40,798 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:00:40,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,841 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 98 [2024-10-31 22:00:40,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:40,843 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:00:40,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:00:40,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:00:40,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,859 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,880 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:00:40,885 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,896 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,899 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,901 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,903 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:00:40,904 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:00:40,904 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:00:40,905 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:00:40,906 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (1/1) ... [2024-10-31 22:00:40,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:40,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:40,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:00:40,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:00:40,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:00:40,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 22:00:40,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:00:40,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:00:41,087 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:00:41,089 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:00:58,294 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-10-31 22:00:58,295 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:00:58,310 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:00:58,310 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-31 22:00:58,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:58 BoogieIcfgContainer [2024-10-31 22:00:58,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:00:58,312 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:00:58,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:00:58,316 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:00:58,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:00:40" (1/3) ... [2024-10-31 22:00:58,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3641f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:58, skipping insertion in model container [2024-10-31 22:00:58,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:40" (2/3) ... [2024-10-31 22:00:58,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3641f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:58, skipping insertion in model container [2024-10-31 22:00:58,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:58" (3/3) ... [2024-10-31 22:00:58,319 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_constant.c.p+cfa-reducer.c [2024-10-31 22:00:58,336 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:00:58,336 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:00:58,399 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:00:58,406 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@49e8a4bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:00:58,406 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:00:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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) [2024-10-31 22:00:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 22:00:58,416 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:58,417 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:58,417 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:58,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:58,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2001896247, now seen corresponding path program 1 times [2024-10-31 22:00:58,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-31 22:00:58,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001954440] [2024-10-31 22:00:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:58,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-31 22:00:58,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/mathsat [2024-10-31 22:00:58,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-31 22:00:58,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8959da97-9837-4b88-91dc-58a33ec3400d/bin/uautomizer-verify-4GaUIPS5ZU/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-31 22:01:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:00,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:01:00,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:01,137 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:01:01,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-31 22:01:01,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001954440] [2024-10-31 22:01:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001954440] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:01,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:01,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:01:01,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130909801] [2024-10-31 22:01:01,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:01,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:01,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-31 22:01:01,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:01,177 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-10-31 22:01:05,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-31 22:01:08,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.95s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-31 22:01:13,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []