./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 30e01a73 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_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0a18ef05fc68655f6745bf4a502e0079c3ee8f2ad8ce0a20fedaec28a3ae221 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:15:25,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:15:25,754 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:15:25,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:15:25,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:15:25,791 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:15:25,792 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:15:25,792 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:15:25,793 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:15:25,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:15:25,794 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:15:25,795 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:15:25,796 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:15:25,796 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:15:25,797 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:15:25,797 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:15:25,798 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:15:25,799 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:15:25,799 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:15:25,800 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:15:25,800 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:15:25,801 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:15:25,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:15:25,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:15:25,803 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:15:25,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:15:25,804 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:15:25,804 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:15:25,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:15:25,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:15:25,805 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:15:25,806 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:15:25,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:15:25,807 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:15:25,807 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:15:25,808 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:15:25,808 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:15:25,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:25,809 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:15:25,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:15:25,810 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:15:25,811 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:15:25,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:15:25,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:15:25,812 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:15:25,812 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:15:25,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:15:25,813 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0a18ef05fc68655f6745bf4a502e0079c3ee8f2ad8ce0a20fedaec28a3ae221 [2023-11-23 21:15:26,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:15:26,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:15:26,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:15:26,101 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:15:26,101 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:15:26,103 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2023-11-23 21:15:29,192 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:15:29,481 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:15:29,482 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2023-11-23 21:15:29,491 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/data/2e5b0737b/c9eaf01c302e4873a37dc5e398b75105/FLAG9bda13dcc [2023-11-23 21:15:29,507 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/data/2e5b0737b/c9eaf01c302e4873a37dc5e398b75105 [2023-11-23 21:15:29,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:15:29,512 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:15:29,513 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:29,514 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:15:29,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:15:29,521 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,522 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@737785b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29, skipping insertion in model container [2023-11-23 21:15:29,522 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,546 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:15:29,719 WARN L240 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_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c[855,868] [2023-11-23 21:15:29,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:29,754 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:15:29,766 WARN L240 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_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c[855,868] [2023-11-23 21:15:29,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:29,792 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:15:29,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29 WrapperNode [2023-11-23 21:15:29,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:29,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:29,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:15:29,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:15:29,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,810 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,833 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2023-11-23 21:15:29,833 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:29,834 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:15:29,834 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:15:29,835 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:15:29,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,847 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,863 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,866 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,868 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,872 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:15:29,875 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:15:29,875 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:15:29,875 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:15:29,876 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2023-11-23 21:15:29,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:29,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:29,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:15:29,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:15:29,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:15:29,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:15:29,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:15:29,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:15:30,051 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:15:30,053 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:15:30,181 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:15:30,254 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:15:30,254 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:15:30,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:30 BoogieIcfgContainer [2023-11-23 21:15:30,256 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:15:30,259 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:15:30,259 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:15:30,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:15:30,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:15:29" (1/3) ... [2023-11-23 21:15:30,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256deede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:30, skipping insertion in model container [2023-11-23 21:15:30,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (2/3) ... [2023-11-23 21:15:30,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256deede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:30, skipping insertion in model container [2023-11-23 21:15:30,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:30" (3/3) ... [2023-11-23 21:15:30,266 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_pseudoconstant.c [2023-11-23 21:15:30,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:15:30,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:15:30,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:15:30,346 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=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;@a91a5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:15:30,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:15:30,351 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) [2023-11-23 21:15:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:15:30,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:30,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:15:30,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:30,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:30,366 INFO L85 PathProgramCache]: Analyzing trace with hash 88968804, now seen corresponding path program 1 times [2023-11-23 21:15:30,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:30,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715361774] [2023-11-23 21:15:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:30,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:15:30,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:15:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:15:30,539 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:15:30,541 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:15:30,542 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 21:15:30,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:15:30,549 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-23 21:15:30,554 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:15:30,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:15:30 BoogieIcfgContainer [2023-11-23 21:15:30,575 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:15:30,576 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:15:30,576 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:15:30,576 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:15:30,577 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:30" (3/4) ... [2023-11-23 21:15:30,579 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 21:15:30,581 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:15:30,582 INFO L158 Benchmark]: Toolchain (without parser) took 1069.82ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 76.7MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2023-11-23 21:15:30,582 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 151.0MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:15:30,583 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.71ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 107.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 21:15:30,584 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.47ms. Allocated memory is still 151.0MB. Free memory was 107.6MB in the beginning and 106.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:15:30,584 INFO L158 Benchmark]: Boogie Preprocessor took 38.53ms. Allocated memory is still 151.0MB. Free memory was 106.1MB in the beginning and 104.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:15:30,585 INFO L158 Benchmark]: RCFGBuilder took 381.81ms. Allocated memory is still 151.0MB. Free memory was 104.8MB in the beginning and 91.9MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 21:15:30,586 INFO L158 Benchmark]: TraceAbstraction took 316.25ms. Allocated memory is still 151.0MB. Free memory was 91.4MB in the beginning and 77.2MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-23 21:15:30,586 INFO L158 Benchmark]: Witness Printer took 4.75ms. Allocated memory is still 151.0MB. Free memory was 77.2MB in the beginning and 76.7MB in the end (delta: 489.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:15:30,590 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 151.0MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.71ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 107.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.47ms. Allocated memory is still 151.0MB. Free memory was 107.6MB in the beginning and 106.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.53ms. Allocated memory is still 151.0MB. Free memory was 106.1MB in the beginning and 104.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 381.81ms. Allocated memory is still 151.0MB. Free memory was 104.8MB in the beginning and 91.9MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 316.25ms. Allocated memory is still 151.0MB. Free memory was 91.4MB in the beginning and 77.2MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 4.75ms. Allocated memory is still 151.0MB. Free memory was 77.2MB in the beginning and 76.7MB in the end (delta: 489.0kB). 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 a call to reach_error is unreachable Unable to prove that a 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 [Input=53, \old(Input)=53, _EPS=1/1000000, cond=0, i=0, 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: 0.2s, 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, 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 [2023-11-23 21:15:30,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0a18ef05fc68655f6745bf4a502e0079c3ee8f2ad8ce0a20fedaec28a3ae221 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:15:33,446 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:15:33,608 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-23 21:15:33,618 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:15:33,619 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:15:33,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:15:33,672 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:15:33,673 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:15:33,674 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:15:33,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:15:33,680 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:15:33,681 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:15:33,682 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:15:33,684 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:15:33,684 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:15:33,685 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:15:33,686 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:15:33,687 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:15:33,687 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:15:33,689 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:15:33,689 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:15:33,690 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:15:33,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:15:33,691 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:15:33,691 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:15:33,692 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:15:33,692 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:15:33,693 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:15:33,693 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:15:33,694 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:15:33,695 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:15:33,696 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:15:33,696 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:15:33,696 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:15:33,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:33,697 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:15:33,697 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:15:33,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:15:33,698 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 21:15:33,699 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:15:33,699 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:15:33,700 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:15:33,700 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:15:33,700 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:15:33,701 INFO L153 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_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0a18ef05fc68655f6745bf4a502e0079c3ee8f2ad8ce0a20fedaec28a3ae221 [2023-11-23 21:15:34,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:15:34,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:15:34,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:15:34,201 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:15:34,202 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:15:34,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2023-11-23 21:15:37,427 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:15:37,712 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:15:37,713 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c [2023-11-23 21:15:37,720 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/data/f44e83683/6cd23a70bb7a4eb991b5257d77f1b393/FLAGb62d3925d [2023-11-23 21:15:37,735 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/data/f44e83683/6cd23a70bb7a4eb991b5257d77f1b393 [2023-11-23 21:15:37,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:15:37,742 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:15:37,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:37,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:15:37,752 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:15:37,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:37" (1/1) ... [2023-11-23 21:15:37,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6928b84e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:37, skipping insertion in model container [2023-11-23 21:15:37,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:37" (1/1) ... [2023-11-23 21:15:37,776 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:15:37,934 WARN L240 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_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c[855,868] [2023-11-23 21:15:37,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:37,991 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:15:38,005 WARN L240 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_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/sv-benchmarks/c/float-benchs/sqrt_Householder_pseudoconstant.c[855,868] [2023-11-23 21:15:38,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:38,033 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:15:38,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38 WrapperNode [2023-11-23 21:15:38,034 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:38,036 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:38,036 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:15:38,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:15:38,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,098 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-11-23 21:15:38,098 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:38,099 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:15:38,099 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:15:38,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:15:38,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,154 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,171 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,192 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,196 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:15:38,197 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:15:38,198 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:15:38,198 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:15:38,199 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (1/1) ... [2023-11-23 21:15:38,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:38,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:38,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:15:38,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:15:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:15:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:15:38,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:15:38,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:15:38,409 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:15:38,412 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:15:48,517 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:15:48,559 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:15:48,559 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:15:48,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:48 BoogieIcfgContainer [2023-11-23 21:15:48,560 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:15:48,564 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:15:48,564 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:15:48,568 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:15:48,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:15:37" (1/3) ... [2023-11-23 21:15:48,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cba2bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:48, skipping insertion in model container [2023-11-23 21:15:48,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:38" (2/3) ... [2023-11-23 21:15:48,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cba2bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:48, skipping insertion in model container [2023-11-23 21:15:48,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:48" (3/3) ... [2023-11-23 21:15:48,573 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_pseudoconstant.c [2023-11-23 21:15:48,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:15:48,596 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:15:48,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:15:48,669 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=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;@48d6fa38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:15:48,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:15:48,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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) [2023-11-23 21:15:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:15:48,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:48,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:48,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:48,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1793132047, now seen corresponding path program 1 times [2023-11-23 21:15:48,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:15:48,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256605645] [2023-11-23 21:15:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:48,713 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 [2023-11-23 21:15:48,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:15:48,716 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 21:15:48,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 21:15:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:50,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 21:15:50,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:15:50,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:50,410 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:15:50,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256605645] [2023-11-23 21:15:50,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256605645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:50,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:50,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:15:50,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060946819] [2023-11-23 21:15:50,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:50,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:15:50,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:15:50,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:15:50,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:15:50,471 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 5.0) internal successors, (10), 2 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) [2023-11-23 21:15:52,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:15:53,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:53,045 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2023-11-23 21:15:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:15:53,055 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) Word has length 10 [2023-11-23 21:15:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:53,062 INFO L225 Difference]: With dead ends: 27 [2023-11-23 21:15:53,062 INFO L226 Difference]: Without dead ends: 12 [2023-11-23 21:15:53,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:15:53,069 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:53,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-11-23 21:15:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-23 21:15:53,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-23 21:15:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2023-11-23 21:15:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-11-23 21:15:53,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2023-11-23 21:15:53,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:53,109 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-11-23 21:15:53,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2023-11-23 21:15:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-11-23 21:15:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:15:53,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:53,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:53,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:53,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 21:15:53,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:53,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:53,339 INFO L85 PathProgramCache]: Analyzing trace with hash 983666257, now seen corresponding path program 1 times [2023-11-23 21:15:53,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:15:53,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245592697] [2023-11-23 21:15:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:53,341 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 [2023-11-23 21:15:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:15:53,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 21:15:53,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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 (3)] Waiting until timeout for monitored process [2023-11-23 21:15:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:55,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:15:55,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:15:56,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:56,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:15:56,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245592697] [2023-11-23 21:15:56,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245592697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:56,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:56,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:15:56,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009516696] [2023-11-23 21:15:56,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:56,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:15:56,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:15:56,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:15:56,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:15:56,605 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2023-11-23 21:15:59,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:02,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:04,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:06,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:08,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:11,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:13,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:15,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:17,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:19,948 WARN L539 Checker$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 [] [2023-11-23 21:16:21,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:24,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:26,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:28,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:28,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:28,462 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-11-23 21:16:28,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:16:28,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) Word has length 10 [2023-11-23 21:16:28,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:28,473 INFO L225 Difference]: With dead ends: 25 [2023-11-23 21:16:28,473 INFO L226 Difference]: Without dead ends: 14 [2023-11-23 21:16:28,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:16:28,475 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:28,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 12 Unknown, 0 Unchecked, 31.5s Time] [2023-11-23 21:16:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-23 21:16:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-23 21:16:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2023-11-23 21:16:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-23 21:16:28,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2023-11-23 21:16:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:28,483 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-23 21:16:28,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2023-11-23 21:16:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-23 21:16:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:16:28,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:28,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:28,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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 (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:16:28,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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 [2023-11-23 21:16:28,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:28,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1040924559, now seen corresponding path program 1 times [2023-11-23 21:16:28,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:16:28,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330660603] [2023-11-23 21:16:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:28,700 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 [2023-11-23 21:16:28,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:16:28,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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) [2023-11-23 21:16:28,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758bf8cb-7eca-4d56-91d3-758ab21b6ae6/bin/utaipan-verify-mE87zJ7Ire/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 (4)] Waiting until timeout for monitored process [2023-11-23 21:16:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:32,607 WARN L260 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:16:32,610 INFO L285 TraceCheckSpWp]: Computing forward predicates...