./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX --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 109f1b0f7b496206cc9c53b0a3b6a7c393044a874053b245259453c5fb39b930 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:01:57,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:01:57,684 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:01:57,698 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:01:57,699 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:01:57,741 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:01:57,742 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:01:57,742 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:01:57,743 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:01:57,753 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:01:57,753 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:01:57,754 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:01:57,754 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:01:57,757 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:01:57,757 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:01:57,758 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:01:57,758 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:01:57,759 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:01:57,759 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:01:57,760 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:01:57,760 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:01:57,761 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:01:57,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:01:57,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:01:57,764 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:01:57,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:01:57,765 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:01:57,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:01:57,766 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:01:57,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:01:57,768 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:01:57,768 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:01:57,769 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:01:57,769 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:01:57,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:01:57,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:01:57,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:57,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:01:57,771 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:01:57,771 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:01:57,771 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:01:57,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:01:57,772 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:01:57,772 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:01:57,773 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:01:57,773 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_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 109f1b0f7b496206cc9c53b0a3b6a7c393044a874053b245259453c5fb39b930 [2023-11-12 01:01:58,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:01:58,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:01:58,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:01:58,179 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:01:58,179 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:01:58,182 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c [2023-11-12 01:02:01,403 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:02:01,579 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:02:01,580 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/sv-benchmarks/c/recursive-simple/id_i15_o15-2.c [2023-11-12 01:02:01,587 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/data/cfdb72541/de7402acddd747f08f3518100809a89b/FLAGae61d889d [2023-11-12 01:02:01,603 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/data/cfdb72541/de7402acddd747f08f3518100809a89b [2023-11-12 01:02:01,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:02:01,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:02:01,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:01,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:02:01,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:02:01,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e93465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01, skipping insertion in model container [2023-11-12 01:02:01,618 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,638 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:02:01,823 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_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/sv-benchmarks/c/recursive-simple/id_i15_o15-2.c[454,467] [2023-11-12 01:02:01,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:01,847 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:02:01,865 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_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/sv-benchmarks/c/recursive-simple/id_i15_o15-2.c[454,467] [2023-11-12 01:02:01,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:01,885 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:02:01,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01 WrapperNode [2023-11-12 01:02:01,886 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:01,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:01,888 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:02:01,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:02:01,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,907 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,929 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2023-11-12 01:02:01,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:01,931 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:02:01,932 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:02:01,932 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:02:01,941 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,944 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,944 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,948 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:02:01,963 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:02:01,964 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:02:01,964 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:02:01,965 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (1/1) ... [2023-11-12 01:02:01,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:02,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:02:02,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:02:02,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:02:02,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:02:02,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:02:02,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:02:02,060 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-11-12 01:02:02,060 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-11-12 01:02:02,146 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:02:02,149 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:02:02,294 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:02:02,353 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:02:02,356 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 01:02:02,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:02 BoogieIcfgContainer [2023-11-12 01:02:02,360 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:02:02,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:02:02,367 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:02:02,372 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:02:02,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:02:01" (1/3) ... [2023-11-12 01:02:02,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7223ff63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:02, skipping insertion in model container [2023-11-12 01:02:02,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:01" (2/3) ... [2023-11-12 01:02:02,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7223ff63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:02, skipping insertion in model container [2023-11-12 01:02:02,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:02" (3/3) ... [2023-11-12 01:02:02,378 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15-2.c [2023-11-12 01:02:02,410 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:02:02,410 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:02:02,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:02:02,495 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;@5d7976dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:02:02,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:02:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 01:02:02,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:02,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:02,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:02,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:02,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2023-11-12 01:02:02,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:02,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193302226] [2023-11-12 01:02:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:02,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:02,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:02,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193302226] [2023-11-12 01:02:02,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193302226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:02,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:02,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:02:02,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409228078] [2023-11-12 01:02:02,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:02,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:02,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:02,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:02,985 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 01:02:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:03,068 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2023-11-12 01:02:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:03,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-12 01:02:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:03,082 INFO L225 Difference]: With dead ends: 22 [2023-11-12 01:02:03,082 INFO L226 Difference]: Without dead ends: 14 [2023-11-12 01:02:03,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:02:03,090 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:03,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:02:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-12 01:02:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-12 01:02:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:03,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-12 01:02:03,141 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-11-12 01:02:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:03,142 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-12 01:02:03,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 01:02:03,143 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-12 01:02:03,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 01:02:03,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:03,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:03,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:02:03,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:03,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:03,147 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2023-11-12 01:02:03,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:03,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428379937] [2023-11-12 01:02:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:03,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:02:03,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:03,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428379937] [2023-11-12 01:02:03,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428379937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:03,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880320513] [2023-11-12 01:02:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:03,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:03,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:03,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:03,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:02:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:03,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:02:03,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:03,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:02:03,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880320513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:03,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436393227] [2023-11-12 01:02:03,982 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 01:02:03,983 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:03,988 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 01:02:03,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:03,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2023-11-12 01:02:03,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137928597] [2023-11-12 01:02:03,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:03,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 01:02:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 01:02:03,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:02:03,997 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 13 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 01:02:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:04,166 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-11-12 01:02:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:02:04,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 13 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 15 [2023-11-12 01:02:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:04,170 INFO L225 Difference]: With dead ends: 33 [2023-11-12 01:02:04,170 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 01:02:04,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2023-11-12 01:02:04,176 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:04,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 33 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 01:02:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-11-12 01:02:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 01:02:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-12 01:02:04,199 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2023-11-12 01:02:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:04,200 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-12 01:02:04,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 13 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 01:02:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-12 01:02:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 01:02:04,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:04,204 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:04,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 01:02:04,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:04,410 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:04,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 2 times [2023-11-12 01:02:04,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:04,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342186785] [2023-11-12 01:02:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:04,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 01:02:04,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:04,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342186785] [2023-11-12 01:02:04,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342186785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:04,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185666461] [2023-11-12 01:02:04,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:04,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:04,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:04,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:04,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:02:04,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 01:02:04,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:04,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 01:02:04,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 01:02:05,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 01:02:06,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185666461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:06,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1836675684] [2023-11-12 01:02:06,209 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 01:02:06,209 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:06,210 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 01:02:06,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:06,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 33 [2023-11-12 01:02:06,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605604764] [2023-11-12 01:02:06,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-12 01:02:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-12 01:02:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 01:02:06,215 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 33 states, 32 states have (on average 1.46875) internal successors, (47), 23 states have internal predecessors, (47), 5 states have call successors, (6), 1 states have call predecessors, (6), 15 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-12 01:02:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:07,123 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2023-11-12 01:02:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-12 01:02:07,123 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.46875) internal successors, (47), 23 states have internal predecessors, (47), 5 states have call successors, (6), 1 states have call predecessors, (6), 15 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) Word has length 33 [2023-11-12 01:02:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:07,125 INFO L225 Difference]: With dead ends: 65 [2023-11-12 01:02:07,126 INFO L226 Difference]: Without dead ends: 44 [2023-11-12 01:02:07,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2023-11-12 01:02:07,130 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 84 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:07,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 52 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-12 01:02:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2023-11-12 01:02:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 01:02:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-11-12 01:02:07,141 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2023-11-12 01:02:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:07,142 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-11-12 01:02:07,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.46875) internal successors, (47), 23 states have internal predecessors, (47), 5 states have call successors, (6), 1 states have call predecessors, (6), 15 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-12 01:02:07,153 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-11-12 01:02:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-12 01:02:07,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:07,156 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:07,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:07,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:07,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:07,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:07,357 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 3 times [2023-11-12 01:02:07,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:07,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570064311] [2023-11-12 01:02:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:07,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 15 proven. 143 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-12 01:02:08,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:08,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570064311] [2023-11-12 01:02:08,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570064311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:08,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130253776] [2023-11-12 01:02:08,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:02:08,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:08,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:08,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:08,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:02:08,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:02:08,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:08,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 01:02:08,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-12 01:02:08,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 01:02:14,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130253776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:14,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666555705] [2023-11-12 01:02:14,343 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 01:02:14,343 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:14,344 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 01:02:14,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:14,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 23] total 30 [2023-11-12 01:02:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342590032] [2023-11-12 01:02:14,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:14,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-12 01:02:14,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-12 01:02:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2023-11-12 01:02:14,353 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 30 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 12 states have call predecessors, (23), 15 states have call successors, (23) [2023-11-12 01:02:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:14,676 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-11-12 01:02:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 01:02:14,679 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 12 states have call predecessors, (23), 15 states have call successors, (23) Word has length 63 [2023-11-12 01:02:14,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:14,686 INFO L225 Difference]: With dead ends: 63 [2023-11-12 01:02:14,687 INFO L226 Difference]: Without dead ends: 53 [2023-11-12 01:02:14,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=565, Invalid=1241, Unknown=0, NotChecked=0, Total=1806 [2023-11-12 01:02:14,695 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:14,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 79 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-12 01:02:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2023-11-12 01:02:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-12 01:02:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2023-11-12 01:02:14,721 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 63 [2023-11-12 01:02:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:14,722 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2023-11-12 01:02:14,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 12 states have call predecessors, (23), 15 states have call successors, (23) [2023-11-12 01:02:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2023-11-12 01:02:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-12 01:02:14,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:14,729 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:14,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:14,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:14,942 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:14,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1158839228, now seen corresponding path program 4 times [2023-11-12 01:02:14,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:14,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55892777] [2023-11-12 01:02:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 21 proven. 245 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-12 01:02:15,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:15,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55892777] [2023-11-12 01:02:15,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55892777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:15,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772686399] [2023-11-12 01:02:15,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:02:15,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:15,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:15,413 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:15,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:02:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:15,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 01:02:15,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-12 01:02:15,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-12 01:02:27,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772686399] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:27,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572358863] [2023-11-12 01:02:27,142 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 01:02:27,142 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:27,143 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 01:02:27,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:27,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 29] total 36 [2023-11-12 01:02:27,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598496304] [2023-11-12 01:02:27,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:27,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-12 01:02:27,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:27,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-12 01:02:27,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 01:02:27,167 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) [2023-11-12 01:02:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:27,578 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2023-11-12 01:02:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 01:02:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) Word has length 81 [2023-11-12 01:02:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:27,581 INFO L225 Difference]: With dead ends: 72 [2023-11-12 01:02:27,581 INFO L226 Difference]: Without dead ends: 62 [2023-11-12 01:02:27,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 142 SyntacticMatches, 13 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=838, Invalid=1814, Unknown=0, NotChecked=0, Total=2652 [2023-11-12 01:02:27,584 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 118 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:27,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 99 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-12 01:02:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2023-11-12 01:02:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 01:02:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-11-12 01:02:27,596 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 81 [2023-11-12 01:02:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:27,596 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-11-12 01:02:27,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) [2023-11-12 01:02:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-11-12 01:02:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-12 01:02:27,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:27,600 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:27,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 01:02:27,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:27,809 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:27,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:27,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1758730226, now seen corresponding path program 5 times [2023-11-12 01:02:27,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:27,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505226613] [2023-11-12 01:02:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:27,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 01:02:27,857 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 01:02:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 01:02:27,934 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 01:02:27,934 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 01:02:27,935 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 01:02:27,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:02:27,942 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-11-12 01:02:27,949 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 01:02:27,994 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:27,997 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:27,998 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:27,998 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:27,998 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:27,999 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:27,999 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,000 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,001 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,001 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,001 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,002 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,002 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,002 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,003 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,004 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret5 could not be translated [2023-11-12 01:02:28,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 01:02:28 BoogieIcfgContainer [2023-11-12 01:02:28,019 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 01:02:28,020 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 01:02:28,020 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 01:02:28,020 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 01:02:28,021 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:02" (3/4) ... [2023-11-12 01:02:28,022 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-12 01:02:28,041 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,041 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,041 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,042 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,042 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,042 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,042 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,043 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,043 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,043 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,043 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,044 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,044 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,044 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,044 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated [2023-11-12 01:02:28,045 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret5 could not be translated [2023-11-12 01:02:28,100 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/witness.graphml [2023-11-12 01:02:28,101 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 01:02:28,101 INFO L158 Benchmark]: Toolchain (without parser) took 26493.61ms. Allocated memory was 123.7MB in the beginning and 224.4MB in the end (delta: 100.7MB). Free memory was 78.7MB in the beginning and 139.8MB in the end (delta: -61.1MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. [2023-11-12 01:02:28,102 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 123.7MB. Free memory is still 71.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 01:02:28,102 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.37ms. Allocated memory is still 123.7MB. Free memory was 78.4MB in the beginning and 68.4MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-12 01:02:28,103 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.10ms. Allocated memory is still 123.7MB. Free memory was 68.4MB in the beginning and 67.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 01:02:28,103 INFO L158 Benchmark]: Boogie Preprocessor took 30.32ms. Allocated memory is still 123.7MB. Free memory was 67.0MB in the beginning and 66.1MB in the end (delta: 907.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 01:02:28,104 INFO L158 Benchmark]: RCFGBuilder took 398.05ms. Allocated memory was 123.7MB in the beginning and 155.2MB in the end (delta: 31.5MB). Free memory was 65.8MB in the beginning and 126.0MB in the end (delta: -60.2MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2023-11-12 01:02:28,104 INFO L158 Benchmark]: TraceAbstraction took 25652.70ms. Allocated memory was 155.2MB in the beginning and 224.4MB in the end (delta: 69.2MB). Free memory was 125.3MB in the beginning and 142.9MB in the end (delta: -17.6MB). Peak memory consumption was 52.0MB. Max. memory is 16.1GB. [2023-11-12 01:02:28,105 INFO L158 Benchmark]: Witness Printer took 81.07ms. Allocated memory is still 224.4MB. Free memory was 142.9MB in the beginning and 139.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 01:02:28,108 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 123.7MB. Free memory is still 71.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.37ms. Allocated memory is still 123.7MB. Free memory was 78.4MB in the beginning and 68.4MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.10ms. Allocated memory is still 123.7MB. Free memory was 68.4MB in the beginning and 67.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.32ms. Allocated memory is still 123.7MB. Free memory was 67.0MB in the beginning and 66.1MB in the end (delta: 907.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 398.05ms. Allocated memory was 123.7MB in the beginning and 155.2MB in the end (delta: 31.5MB). Free memory was 65.8MB in the beginning and 126.0MB in the end (delta: -60.2MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * TraceAbstraction took 25652.70ms. Allocated memory was 155.2MB in the beginning and 224.4MB in the end (delta: 69.2MB). Free memory was 125.3MB in the beginning and 142.9MB in the end (delta: -17.6MB). Peak memory consumption was 52.0MB. Max. memory is 16.1GB. * Witness Printer took 81.07ms. Allocated memory is still 224.4MB. Free memory was 142.9MB in the beginning and 139.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret5 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret5 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 15; VAL [input=15] [L13] CALL, EXPR id(input) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, x=15] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [input=15] [L13] int result = id(input); [L14] COND TRUE result == 15 VAL [input=15, result=15] [L15] reach_error() VAL [input=15, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.5s, OverallIterations: 6, TraceHistogramMax: 16, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 389 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 334 mSDsluCounter, 286 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 251 mSDsCounter, 161 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 414 IncrementalHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 161 mSolverCounterUnsat, 35 mSDtfsCounter, 414 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 519 GetRequests, 321 SyntacticMatches, 25 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=5, InterpolantAutomatonStates: 89, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 21.4s InterpolantComputationTime, 492 NumberOfCodeBlocks, 492 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 572 ConstructedInterpolants, 0 QuantifiedInterpolants, 1670 SizeOfPredicates, 25 NumberOfNonLiveVariables, 536 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 854/2256 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 proved your program to be incorrect! [2023-11-12 01:02:28,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1fe6d7f-ca84-4fc9-9147-7e36e457efc1/bin/utaipan-verify-NcY6lQBIFX/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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE