./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/ludcmp.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_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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_4371f64e-68c9-43bb-89a2-14a596b30267/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 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:17:53,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:17:53,196 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:17:53,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:17:53,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:17:53,259 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:17:53,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:17:53,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:17:53,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:17:53,269 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:17:53,269 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:17:53,271 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:17:53,272 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:17:53,274 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:17:53,274 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:17:53,275 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:17:53,275 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:17:53,276 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:17:53,277 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:17:53,277 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:17:53,278 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:17:53,278 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:17:53,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:17:53,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:17:53,294 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:17:53,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:17:53,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:17:53,296 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:17:53,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:17:53,297 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:17:53,298 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:17:53,299 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:17:53,299 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:17:53,299 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:17:53,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:17:53,300 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:17:53,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:17:53,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:53,302 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:17:53,302 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:17:53,303 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:17:53,303 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:17:53,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:17:53,304 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:17:53,304 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:17:53,305 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:17:53,305 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:17:53,305 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_4371f64e-68c9-43bb-89a2-14a596b30267/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 [2023-11-23 21:17:53,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:17:53,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:17:53,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:17:53,701 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:17:53,702 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:17:53,703 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/loops/ludcmp.c [2023-11-23 21:17:56,943 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:17:57,187 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:17:57,188 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/sv-benchmarks/c/loops/ludcmp.c [2023-11-23 21:17:57,203 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/data/246b463f7/d05475e710c842c1889f2e2fd0a1acb1/FLAG388f60bda [2023-11-23 21:17:57,223 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/data/246b463f7/d05475e710c842c1889f2e2fd0a1acb1 [2023-11-23 21:17:57,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:17:57,233 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:17:57,235 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:57,236 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:17:57,242 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:17:57,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,246 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b5bdcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57, skipping insertion in model container [2023-11-23 21:17:57,246 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,284 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:17:57,457 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_4371f64e-68c9-43bb-89a2-14a596b30267/sv-benchmarks/c/loops/ludcmp.c[318,331] [2023-11-23 21:17:57,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:57,517 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:17:57,530 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_4371f64e-68c9-43bb-89a2-14a596b30267/sv-benchmarks/c/loops/ludcmp.c[318,331] [2023-11-23 21:17:57,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:57,576 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:17:57,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57 WrapperNode [2023-11-23 21:17:57,577 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:57,578 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:57,579 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:17:57,579 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:17:57,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,597 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,635 INFO L138 Inliner]: procedures = 17, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 223 [2023-11-23 21:17:57,636 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:57,636 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:17:57,637 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:17:57,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:17:57,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,673 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,682 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:17:57,683 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:17:57,683 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:17:57,683 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:17:57,684 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (1/1) ... [2023-11-23 21:17:57,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:57,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:57,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:17:57,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:17:57,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:17:57,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:17:57,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:17:57,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-23 21:17:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-23 21:17:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:17:57,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:17:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:17:57,948 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:17:57,951 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:17:58,428 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:17:58,573 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:17:58,574 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-23 21:17:58,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:58 BoogieIcfgContainer [2023-11-23 21:17:58,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:17:58,580 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:17:58,580 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:17:58,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:17:58,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:17:57" (1/3) ... [2023-11-23 21:17:58,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c71f6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:58, skipping insertion in model container [2023-11-23 21:17:58,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:57" (2/3) ... [2023-11-23 21:17:58,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c71f6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:58, skipping insertion in model container [2023-11-23 21:17:58,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:58" (3/3) ... [2023-11-23 21:17:58,589 INFO L112 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2023-11-23 21:17:58,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:17:58,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:17:58,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:17:58,684 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;@20ddf95d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:17:58,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:17:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 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 21:17:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:17:58,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:58,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:17:58,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:58,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:58,706 INFO L85 PathProgramCache]: Analyzing trace with hash 224014034, now seen corresponding path program 1 times [2023-11-23 21:17:58,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:58,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934263750] [2023-11-23 21:17:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:58,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:59,055 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 21:17:59,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:59,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934263750] [2023-11-23 21:17:59,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934263750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:59,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:59,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:59,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43905908] [2023-11-23 21:17:59,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:59,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:59,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:59,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:59,107 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 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 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 21:17:59,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:59,210 INFO L93 Difference]: Finished difference Result 44 states and 73 transitions. [2023-11-23 21:17:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2023-11-23 21:17:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:59,229 INFO L225 Difference]: With dead ends: 44 [2023-11-23 21:17:59,229 INFO L226 Difference]: Without dead ends: 8 [2023-11-23 21:17:59,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:59,238 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:59,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:17:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-11-23 21:17:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-11-23 21:17:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 21:17:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-11-23 21:17:59,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-11-23 21:17:59,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:59,280 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-11-23 21:17:59,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 21:17:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-11-23 21:17:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:17:59,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:59,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:17:59,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:17:59,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:59,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:59,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1645428450, now seen corresponding path program 1 times [2023-11-23 21:17:59,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:59,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564912362] [2023-11-23 21:17:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:59,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:59,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:59,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564912362] [2023-11-23 21:17:59,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564912362] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:17:59,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161088670] [2023-11-23 21:17:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:59,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:59,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:59,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:59,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:17:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:59,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:17:59,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:59,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:59,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161088670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:59,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1689806056] [2023-11-23 21:17:59,769 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-23 21:17:59,769 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:17:59,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:17:59,781 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:17:59,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:18:00,654 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:18:00,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '147#(and (= 5 |ULTIMATE.start_main_~n~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= |~#x~0.offset| 0) (= |~#b~0.base| 5) (<= 6 |ULTIMATE.start_main_~j~0#1|) (= |~#x~0.base| 6) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= 50 |ULTIMATE.start_main_~nmax~0#1|) (= |~#a~0.base| 4) (= (/ 1.0 1000000.0) |ULTIMATE.start_main_~eps~0#1|))' at error location [2023-11-23 21:18:00,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:18:00,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:18:00,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-23 21:18:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053952773] [2023-11-23 21:18:00,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:18:00,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:18:00,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:18:00,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:18:00,971 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 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 21:18:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:01,048 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2023-11-23 21:18:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:18:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 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 6 [2023-11-23 21:18:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:01,049 INFO L225 Difference]: With dead ends: 18 [2023-11-23 21:18:01,049 INFO L226 Difference]: Without dead ends: 11 [2023-11-23 21:18:01,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:18:01,052 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:01,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 9 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:18:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-23 21:18:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-23 21:18:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:18:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-11-23 21:18:01,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2023-11-23 21:18:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:01,059 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-11-23 21:18:01,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 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 21:18:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-11-23 21:18:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:18:01,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:01,060 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-23 21:18:01,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:01,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:01,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:01,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:01,286 INFO L85 PathProgramCache]: Analyzing trace with hash -426614318, now seen corresponding path program 2 times [2023-11-23 21:18:01,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:01,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855011291] [2023-11-23 21:18:01,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:01,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:01,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:01,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855011291] [2023-11-23 21:18:01,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855011291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:01,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562003472] [2023-11-23 21:18:01,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:18:01,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:01,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:01,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:01,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:18:01,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:18:01,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:18:01,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:18:01,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:01,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:01,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562003472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:01,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [750205789] [2023-11-23 21:18:01,993 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-23 21:18:01,993 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:18:01,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:18:01,993 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:18:01,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:18:02,358 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:18:02,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '261#(and (= 5 |ULTIMATE.start_main_~n~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= |~#x~0.offset| 0) (= |~#b~0.base| 5) (<= 6 |ULTIMATE.start_main_~j~0#1|) (= |~#x~0.base| 6) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= 50 |ULTIMATE.start_main_~nmax~0#1|) (= |~#a~0.base| 4) (= (/ 1.0 1000000.0) |ULTIMATE.start_main_~eps~0#1|))' at error location [2023-11-23 21:18:02,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:18:02,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:18:02,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-23 21:18:02,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402488808] [2023-11-23 21:18:02,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:18:02,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 21:18:02,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:02,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 21:18:02,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:18:02,685 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 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 21:18:02,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:02,747 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-23 21:18:02,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:18:02,748 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 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 9 [2023-11-23 21:18:02,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:02,750 INFO L225 Difference]: With dead ends: 23 [2023-11-23 21:18:02,750 INFO L226 Difference]: Without dead ends: 13 [2023-11-23 21:18:02,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:18:02,758 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:02,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:18:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-23 21:18:02,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-23 21:18:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 21:18:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-23 21:18:02,772 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-11-23 21:18:02,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:02,772 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-23 21:18:02,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 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 21:18:02,773 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-23 21:18:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:18:02,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:02,773 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2023-11-23 21:18:02,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:02,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-23 21:18:02,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:02,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:02,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1952191662, now seen corresponding path program 3 times [2023-11-23 21:18:02,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:02,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357750034] [2023-11-23 21:18:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:02,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:18:03,048 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:18:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:18:03,096 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:18:03,097 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:18:03,098 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 21:18:03,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:18:03,104 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-23 21:18:03,108 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:18:03,127 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated [2023-11-23 21:18:03,129 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated [2023-11-23 21:18:03,129 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated [2023-11-23 21:18:03,130 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated [2023-11-23 21:18:03,131 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated [2023-11-23 21:18:03,131 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated [2023-11-23 21:18:03,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:18:03 BoogieIcfgContainer [2023-11-23 21:18:03,142 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:18:03,142 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:18:03,142 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:18:03,143 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:18:03,143 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:58" (3/4) ... [2023-11-23 21:18:03,146 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 21:18:03,147 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:18:03,148 INFO L158 Benchmark]: Toolchain (without parser) took 5915.41ms. Allocated memory was 115.3MB in the beginning and 151.0MB in the end (delta: 35.7MB). Free memory was 69.9MB in the beginning and 93.4MB in the end (delta: -23.6MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2023-11-23 21:18:03,148 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 115.3MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:18:03,149 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.12ms. Allocated memory is still 115.3MB. Free memory was 69.9MB in the beginning and 57.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 21:18:03,149 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.50ms. Allocated memory is still 115.3MB. Free memory was 57.3MB in the beginning and 54.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:18:03,150 INFO L158 Benchmark]: Boogie Preprocessor took 45.33ms. Allocated memory is still 115.3MB. Free memory was 54.8MB in the beginning and 53.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:18:03,150 INFO L158 Benchmark]: RCFGBuilder took 893.80ms. Allocated memory was 115.3MB in the beginning and 151.0MB in the end (delta: 35.7MB). Free memory was 53.1MB in the beginning and 111.4MB in the end (delta: -58.3MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. [2023-11-23 21:18:03,150 INFO L158 Benchmark]: TraceAbstraction took 4561.69ms. Allocated memory is still 151.0MB. Free memory was 110.6MB in the beginning and 93.4MB in the end (delta: 17.2MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2023-11-23 21:18:03,151 INFO L158 Benchmark]: Witness Printer took 5.10ms. Allocated memory is still 151.0MB. Free memory is still 93.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:18:03,153 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 115.3MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 342.12ms. Allocated memory is still 115.3MB. Free memory was 69.9MB in the beginning and 57.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.50ms. Allocated memory is still 115.3MB. Free memory was 57.3MB in the beginning and 54.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.33ms. Allocated memory is still 115.3MB. Free memory was 54.8MB in the beginning and 53.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 893.80ms. Allocated memory was 115.3MB in the beginning and 151.0MB in the end (delta: 35.7MB). Free memory was 53.1MB in the beginning and 111.4MB in the end (delta: -58.3MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. * TraceAbstraction took 4561.69ms. Allocated memory is still 151.0MB. Free memory was 110.6MB in the beginning and 93.4MB in the end (delta: 17.2MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. * Witness Printer took 5.10ms. Allocated memory is still 151.0MB. Free memory is still 93.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 7]: 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 to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 99. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, n=5, nmax=50, x={6:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=0, n=5, nmax=50, w=0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={6:0}] [L96] COND FALSE !(j <= n) [L102] CALL __VERIFIER_assert(i==2) [L6] COND TRUE !(cond) VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] [L7] reach_error() VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 67 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 67 mSDsluCounter, 50 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 31 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 86 IncrementalHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 19 mSDtfsCounter, 86 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 20, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 159 SizeOfPredicates, 4 NumberOfNonLiveVariables, 225 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 21:18:03,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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_4371f64e-68c9-43bb-89a2-14a596b30267/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 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:18:05,887 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:18:06,024 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-23 21:18:06,032 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:18:06,035 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:18:06,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:18:06,073 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:18:06,074 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:18:06,075 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:18:06,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:18:06,081 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:18:06,082 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:18:06,082 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:18:06,084 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:18:06,085 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:18:06,085 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:18:06,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:18:06,087 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:18:06,087 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:18:06,089 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:18:06,089 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:18:06,090 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:18:06,090 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:18:06,091 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:18:06,091 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:18:06,091 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:18:06,092 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:18:06,092 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:18:06,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:18:06,093 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:18:06,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:18:06,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:18:06,095 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:18:06,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:18:06,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:06,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:18:06,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:18:06,097 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:18:06,097 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 21:18:06,098 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:18:06,099 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:18:06,099 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:18:06,099 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:18:06,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:18:06,100 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_4371f64e-68c9-43bb-89a2-14a596b30267/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 [2023-11-23 21:18:06,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:18:06,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:18:06,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:18:06,588 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:18:06,589 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:18:06,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/loops/ludcmp.c [2023-11-23 21:18:10,051 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:18:10,432 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:18:10,434 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/sv-benchmarks/c/loops/ludcmp.c [2023-11-23 21:18:10,447 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/data/85a65d155/d56fb8be1aee4ada800a17f8de7b87b2/FLAG262ede6fe [2023-11-23 21:18:10,468 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/data/85a65d155/d56fb8be1aee4ada800a17f8de7b87b2 [2023-11-23 21:18:10,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:18:10,480 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:18:10,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:10,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:18:10,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:18:10,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc1910d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10, skipping insertion in model container [2023-11-23 21:18:10,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:18:10,720 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_4371f64e-68c9-43bb-89a2-14a596b30267/sv-benchmarks/c/loops/ludcmp.c[318,331] [2023-11-23 21:18:10,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:10,784 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:18:10,797 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_4371f64e-68c9-43bb-89a2-14a596b30267/sv-benchmarks/c/loops/ludcmp.c[318,331] [2023-11-23 21:18:10,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:10,847 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:18:10,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10 WrapperNode [2023-11-23 21:18:10,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:10,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:10,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:18:10,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:18:10,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,915 INFO L138 Inliner]: procedures = 18, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 223 [2023-11-23 21:18:10,916 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:10,917 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:18:10,917 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:18:10,917 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:18:10,927 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,935 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,952 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,960 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,967 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,972 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:18:10,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:18:10,974 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:18:10,974 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:18:10,975 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (1/1) ... [2023-11-23 21:18:10,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:10,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:11,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:18:11,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:18:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:18:11,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2023-11-23 21:18:11,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2023-11-23 21:18:11,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:18:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:18:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:18:11,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:18:11,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:18:11,227 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:18:11,229 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:18:27,122 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:18:27,242 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:18:27,242 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-23 21:18:27,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:27 BoogieIcfgContainer [2023-11-23 21:18:27,244 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:18:27,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:18:27,247 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:18:27,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:18:27,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:18:10" (1/3) ... [2023-11-23 21:18:27,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8b8783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:27, skipping insertion in model container [2023-11-23 21:18:27,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:10" (2/3) ... [2023-11-23 21:18:27,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8b8783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:27, skipping insertion in model container [2023-11-23 21:18:27,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:27" (3/3) ... [2023-11-23 21:18:27,258 INFO L112 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2023-11-23 21:18:27,282 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:18:27,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:18:27,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:18:27,344 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;@5f0c2e91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:18:27,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:18:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 35 states have internal predecessors, (63), 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 21:18:27,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:18:27,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:27,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:18:27,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:27,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:27,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1651937303, now seen corresponding path program 1 times [2023-11-23 21:18:27,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:18:27,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470823017] [2023-11-23 21:18:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:27,381 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 21:18:27,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:18:27,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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 21:18:27,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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 21:18:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:27,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:18:27,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:27,670 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 21:18:27,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:18:27,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:18:27,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470823017] [2023-11-23 21:18:27,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470823017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:27,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:27,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:18:27,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292599618] [2023-11-23 21:18:27,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:27,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:18:27,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:18:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:18:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:18:27,716 INFO L87 Difference]: Start difference. First operand has 36 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 35 states have internal predecessors, (63), 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 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 21:18:31,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:33,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:35,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:37,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:39,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:41,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:43,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:45,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:48,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:50,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:52,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:54,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:54,257 INFO L93 Difference]: Finished difference Result 74 states and 131 transitions. [2023-11-23 21:18:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:18:54,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-11-23 21:18:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:54,269 INFO L225 Difference]: With dead ends: 74 [2023-11-23 21:18:54,269 INFO L226 Difference]: Without dead ends: 13 [2023-11-23 21:18:54,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:18:54,276 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:54,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 62 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 12 Unknown, 0 Unchecked, 26.5s Time] [2023-11-23 21:18:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-23 21:18:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2023-11-23 21:18:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 21:18:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-23 21:18:54,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 6 [2023-11-23 21:18:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:54,308 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-23 21:18:54,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 21:18:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-23 21:18:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:18:54,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:54,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:54,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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 21:18:54,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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 21:18:54,512 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:54,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:54,513 INFO L85 PathProgramCache]: Analyzing trace with hash 519003941, now seen corresponding path program 1 times [2023-11-23 21:18:54,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:18:54,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820741644] [2023-11-23 21:18:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:54,514 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 21:18:54,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:18:54,516 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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 21:18:54,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/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 21:18:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:54,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:18:54,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:55,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:55,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:18:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820741644] [2023-11-23 21:18:55,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820741644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1418635788] [2023-11-23 21:18:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:55,452 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:18:55,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:18:55,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:18:55,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-11-23 21:18:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:55,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:18:55,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:56,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:56,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1418635788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:56,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531262037] [2023-11-23 21:18:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:56,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:56,177 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:56,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4371f64e-68c9-43bb-89a2-14a596b30267/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:18:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:56,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:18:56,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:56,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:18:56,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531262037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:56,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:18:56,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2023-11-23 21:18:56,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489465685] [2023-11-23 21:18:56,656 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:18:56,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:18:56,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:18:56,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:18:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:56,659 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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)