./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje --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 7f12bfc45347636ba11cd9198984e4ca6a9fb471afaf773fd02be6e88eb44e8c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:27:00,231 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:27:00,372 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:27:00,382 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:27:00,386 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:27:00,436 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:27:00,437 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:27:00,438 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:27:00,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:27:00,441 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:27:00,442 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:27:00,443 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:27:00,443 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:27:00,444 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:27:00,444 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:27:00,445 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:27:00,445 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:27:00,449 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:27:00,450 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:27:00,450 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:27:00,451 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:27:00,452 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:27:00,452 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:27:00,453 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:27:00,453 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:27:00,454 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:27:00,454 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:27:00,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:27:00,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:27:00,460 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:27:00,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:27:00,460 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:27:00,461 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:27:00,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:27:00,461 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:27:00,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:27:00,465 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:27:00,466 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:27:00,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:27:00,467 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:27:00,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:27:00,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:27:00,469 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:27:00,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:27:00,469 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:27:00,470 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:27:00,470 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:27:00,471 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_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f12bfc45347636ba11cd9198984e4ca6a9fb471afaf773fd02be6e88eb44e8c [2024-11-09 05:27:00,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:27:00,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:27:00,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:27:00,958 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:27:00,959 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:27:00,961 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c Unable to find full path for "g++" [2024-11-09 05:27:03,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:27:03,934 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:27:03,935 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2024-11-09 05:27:03,945 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/data/400fc0757/e27c95e829ae4f7f94404d41bfe62b5a/FLAGf096b42b2 [2024-11-09 05:27:04,281 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/data/400fc0757/e27c95e829ae4f7f94404d41bfe62b5a [2024-11-09 05:27:04,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:27:04,287 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:27:04,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:27:04,289 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:27:04,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:27:04,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a27b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04, skipping insertion in model container [2024-11-09 05:27:04,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,332 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:27:04,578 WARN L250 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_dea04f56-8878-401e-b606-029a296fad9e/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c[524,537] [2024-11-09 05:27:04,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:27:04,644 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:27:04,661 WARN L250 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_dea04f56-8878-401e-b606-029a296fad9e/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c[524,537] [2024-11-09 05:27:04,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:27:04,707 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:27:04,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04 WrapperNode [2024-11-09 05:27:04,707 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:27:04,709 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:27:04,709 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:27:04,709 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:27:04,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,733 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,761 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2024-11-09 05:27:04,762 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:27:04,763 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:27:04,763 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:27:04,763 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:27:04,773 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,781 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,786 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,787 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,789 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,791 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:27:04,792 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:27:04,792 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:27:04,793 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:27:04,794 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (1/1) ... [2024-11-09 05:27:04,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:27:04,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:04,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:27:04,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:27:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:27:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:27:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:27:04,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:27:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 05:27:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 05:27:04,978 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:27:04,982 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:27:05,221 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 05:27:05,221 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:27:05,426 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:27:05,428 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 05:27:05,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:27:05 BoogieIcfgContainer [2024-11-09 05:27:05,429 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:27:05,433 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:27:05,434 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:27:05,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:27:05,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:27:04" (1/3) ... [2024-11-09 05:27:05,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5475e177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:27:05, skipping insertion in model container [2024-11-09 05:27:05,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:27:04" (2/3) ... [2024-11-09 05:27:05,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5475e177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:27:05, skipping insertion in model container [2024-11-09 05:27:05,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:27:05" (3/3) ... [2024-11-09 05:27:05,446 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound5.c [2024-11-09 05:27:05,473 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:27:05,474 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:27:05,544 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:27:05,552 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=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;@1cf4dbf2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:27:05,552 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:27:05,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:27:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 05:27:05,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:05,569 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 05:27:05,570 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:05,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:05,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1305450280, now seen corresponding path program 1 times [2024-11-09 05:27:05,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:05,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541513325] [2024-11-09 05:27:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:05,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:05,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:05,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541513325] [2024-11-09 05:27:05,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541513325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:05,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:27:05,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:27:05,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817953882] [2024-11-09 05:27:05,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:05,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 05:27:05,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:05,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 05:27:05,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 05:27:05,843 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:27:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:05,890 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2024-11-09 05:27:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 05:27:05,899 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 05:27:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:05,910 INFO L225 Difference]: With dead ends: 29 [2024-11-09 05:27:05,910 INFO L226 Difference]: Without dead ends: 13 [2024-11-09 05:27:05,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 05:27:05,919 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:05,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:27:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-09 05:27:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-09 05:27:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 05:27:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-11-09 05:27:05,971 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2024-11-09 05:27:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:05,971 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-11-09 05:27:05,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:27:05,972 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-11-09 05:27:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:27:05,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:05,973 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:05,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:27:05,974 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:05,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1607447807, now seen corresponding path program 1 times [2024-11-09 05:27:05,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:05,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089693206] [2024-11-09 05:27:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:05,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:06,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:06,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089693206] [2024-11-09 05:27:06,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089693206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:06,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:27:06,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:27:06,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885947629] [2024-11-09 05:27:06,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:06,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:27:06,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:06,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:27:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:27:06,134 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:27:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:06,215 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2024-11-09 05:27:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:27:06,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 05:27:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:06,220 INFO L225 Difference]: With dead ends: 23 [2024-11-09 05:27:06,220 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 05:27:06,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:27:06,227 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:06,246 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:27:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 05:27:06,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-09 05:27:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 05:27:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-11-09 05:27:06,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2024-11-09 05:27:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:06,264 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-11-09 05:27:06,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:27:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-11-09 05:27:06,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:27:06,265 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:06,266 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:06,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:27:06,267 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:06,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:06,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1609235267, now seen corresponding path program 1 times [2024-11-09 05:27:06,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:06,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574494020] [2024-11-09 05:27:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:06,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:27:06,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071478314] [2024-11-09 05:27:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:06,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:06,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:06,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:27:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:06,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:27:06,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:06,673 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:06,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574494020] [2024-11-09 05:27:06,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:27:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071478314] [2024-11-09 05:27:06,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071478314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:06,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:27:06,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:27:06,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193002174] [2024-11-09 05:27:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:06,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:27:06,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:06,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:27:06,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:27:06,686 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:27:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:06,769 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-11-09 05:27:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:27:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 05:27:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:06,772 INFO L225 Difference]: With dead ends: 25 [2024-11-09 05:27:06,772 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 05:27:06,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:27:06,774 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:06,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:27:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 05:27:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2024-11-09 05:27:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:27:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-09 05:27:06,786 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2024-11-09 05:27:06,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:06,787 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-09 05:27:06,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:27:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-09 05:27:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 05:27:06,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:06,789 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:06,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:27:06,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:06,994 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:06,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1472800496, now seen corresponding path program 1 times [2024-11-09 05:27:06,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:06,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299009168] [2024-11-09 05:27:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:06,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:27:07,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812118458] [2024-11-09 05:27:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:07,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:07,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:07,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:07,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:27:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:07,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:27:07,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:07,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:07,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:07,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299009168] [2024-11-09 05:27:07,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:27:07,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812118458] [2024-11-09 05:27:07,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812118458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:27:07,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1784990492] [2024-11-09 05:27:07,751 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:27:07,752 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:27:07,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:27:07,765 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:27:07,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:27:08,249 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2024-11-09 05:27:08,283 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:27:09,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1784990492] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:09,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:27:09,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 18 [2024-11-09 05:27:09,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436347448] [2024-11-09 05:27:09,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:09,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:27:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:27:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:27:09,624 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:27:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:09,811 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-09 05:27:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:27:09,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-09 05:27:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:09,813 INFO L225 Difference]: With dead ends: 29 [2024-11-09 05:27:09,813 INFO L226 Difference]: Without dead ends: 21 [2024-11-09 05:27:09,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:27:09,815 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:09,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:27:09,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-09 05:27:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-09 05:27:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:27:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-09 05:27:09,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2024-11-09 05:27:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:09,823 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-09 05:27:09,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:27:09,824 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-09 05:27:09,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 05:27:09,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:09,825 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:09,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 05:27:10,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:10,027 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:10,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:10,028 INFO L85 PathProgramCache]: Analyzing trace with hash -984927605, now seen corresponding path program 1 times [2024-11-09 05:27:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:10,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955998564] [2024-11-09 05:27:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:10,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:10,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:10,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955998564] [2024-11-09 05:27:10,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955998564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:10,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475170734] [2024-11-09 05:27:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:10,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:10,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:10,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:10,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:27:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:10,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:27:10,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:10,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:10,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475170734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:27:10,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1964973300] [2024-11-09 05:27:10,455 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:27:10,456 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:27:10,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:27:10,458 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:27:10,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:27:11,593 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2024-11-09 05:27:11,753 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:27:13,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '490#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:27:13,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:27:13,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:27:13,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-09 05:27:13,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995299793] [2024-11-09 05:27:13,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:27:13,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:27:13,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:13,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:27:13,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:27:13,152 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 05:27:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:13,316 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2024-11-09 05:27:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 05:27:13,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2024-11-09 05:27:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:13,319 INFO L225 Difference]: With dead ends: 55 [2024-11-09 05:27:13,320 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 05:27:13,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:27:13,322 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:13,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:27:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 05:27:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-11-09 05:27:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 05:27:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-11-09 05:27:13,338 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2024-11-09 05:27:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:13,338 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-11-09 05:27:13,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 05:27:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-11-09 05:27:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 05:27:13,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:13,340 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:13,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:27:13,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:13,541 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:13,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:13,542 INFO L85 PathProgramCache]: Analyzing trace with hash -983140145, now seen corresponding path program 1 times [2024-11-09 05:27:13,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:13,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688987793] [2024-11-09 05:27:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:13,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:27:13,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85522650] [2024-11-09 05:27:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:13,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:13,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:13,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:13,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:27:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:13,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:27:13,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:15,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:16,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688987793] [2024-11-09 05:27:16,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:27:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85522650] [2024-11-09 05:27:16,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85522650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:27:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824971111] [2024-11-09 05:27:16,100 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 05:27:16,101 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:27:16,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:27:16,101 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:27:16,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:27:16,849 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2024-11-09 05:27:16,894 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:27:17,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '749#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (<= ~counter~0 5))' at error location [2024-11-09 05:27:17,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:27:17,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:27:17,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-09 05:27:17,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132897353] [2024-11-09 05:27:17,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 05:27:17,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:27:17,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:17,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:27:17,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:27:17,461 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 05:27:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:17,671 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2024-11-09 05:27:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:27:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-11-09 05:27:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:17,676 INFO L225 Difference]: With dead ends: 57 [2024-11-09 05:27:17,678 INFO L226 Difference]: Without dead ends: 55 [2024-11-09 05:27:17,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:27:17,680 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:17,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:27:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-09 05:27:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2024-11-09 05:27:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 05:27:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-11-09 05:27:17,708 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 15 [2024-11-09 05:27:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:17,709 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-11-09 05:27:17,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 05:27:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-11-09 05:27:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 05:27:17,710 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:17,710 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:17,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:27:17,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:17,911 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:17,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash -841266308, now seen corresponding path program 1 times [2024-11-09 05:27:17,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:17,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130211957] [2024-11-09 05:27:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:27:18,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031361126] [2024-11-09 05:27:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:18,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:18,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:18,011 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:18,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:27:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:18,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:27:18,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:27:18,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:27:18,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:18,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130211957] [2024-11-09 05:27:18,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:27:18,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031361126] [2024-11-09 05:27:18,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031361126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:27:18,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1446687607] [2024-11-09 05:27:18,357 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:27:18,357 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:27:18,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:27:18,358 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:27:18,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:27:19,089 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2024-11-09 05:27:19,173 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:27:19,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1039#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (<= ~counter~0 5))' at error location [2024-11-09 05:27:19,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:27:19,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:27:19,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-11-09 05:27:19,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026695509] [2024-11-09 05:27:19,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 05:27:19,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:27:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:19,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:27:19,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:27:19,999 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 05:27:22,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 05:27:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:22,269 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-11-09 05:27:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:27:22,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2024-11-09 05:27:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:22,273 INFO L225 Difference]: With dead ends: 50 [2024-11-09 05:27:22,273 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 05:27:22,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:27:22,277 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:22,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 52 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 05:27:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 05:27:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-09 05:27:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 05:27:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-09 05:27:22,303 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2024-11-09 05:27:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:22,303 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-09 05:27:22,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 05:27:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-09 05:27:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 05:27:22,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:22,305 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:22,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:27:22,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:22,506 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:22,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2034232297, now seen corresponding path program 1 times [2024-11-09 05:27:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:22,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050464573] [2024-11-09 05:27:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:22,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:27:22,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753325336] [2024-11-09 05:27:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:22,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:22,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:22,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:22,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:27:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:22,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:27:22,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:27:22,763 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:27:22,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:22,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050464573] [2024-11-09 05:27:22,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 05:27:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753325336] [2024-11-09 05:27:22,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753325336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:27:22,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:27:22,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:27:22,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872555476] [2024-11-09 05:27:22,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:22,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:27:22,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:27:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:27:22,767 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 05:27:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:22,830 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2024-11-09 05:27:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:27:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-11-09 05:27:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:22,832 INFO L225 Difference]: With dead ends: 55 [2024-11-09 05:27:22,832 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 05:27:22,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:27:22,834 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:22,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:27:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 05:27:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-09 05:27:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 05:27:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2024-11-09 05:27:22,851 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 26 [2024-11-09 05:27:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:22,851 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2024-11-09 05:27:22,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 05:27:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2024-11-09 05:27:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 05:27:22,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:22,853 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 05:27:22,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:27:23,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:23,058 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:23,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:23,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1638654767, now seen corresponding path program 2 times [2024-11-09 05:27:23,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:23,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680447168] [2024-11-09 05:27:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:23,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:27:23,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:23,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680447168] [2024-11-09 05:27:23,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680447168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:23,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371234895] [2024-11-09 05:27:23,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:27:23,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:23,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:23,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:23,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:27:23,716 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 05:27:23,716 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:27:23,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:27:23,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:27:23,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:27:23,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371234895] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:27:23,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130285864] [2024-11-09 05:27:23,909 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 05:27:23,909 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:27:23,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:27:23,910 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:27:23,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:27:24,639 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2024-11-09 05:27:24,731 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:27:25,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1660#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:27:25,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:27:25,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:27:25,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 8 [2024-11-09 05:27:25,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036583938] [2024-11-09 05:27:25,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:27:25,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:27:25,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:25,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:27:25,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:27:25,683 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 05:27:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:25,834 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2024-11-09 05:27:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:27:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 39 [2024-11-09 05:27:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:25,840 INFO L225 Difference]: With dead ends: 59 [2024-11-09 05:27:25,840 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 05:27:25,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:27:25,842 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:25,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:27:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 05:27:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-09 05:27:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 05:27:25,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-11-09 05:27:25,870 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 39 [2024-11-09 05:27:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:25,870 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-11-09 05:27:25,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 05:27:25,871 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-11-09 05:27:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 05:27:25,872 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:25,872 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2024-11-09 05:27:25,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 05:27:26,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:26,073 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:26,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:26,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1139683515, now seen corresponding path program 3 times [2024-11-09 05:27:26,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:26,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287049202] [2024-11-09 05:27:26,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:26,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 05:27:26,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754771061] [2024-11-09 05:27:26,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:27:26,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:26,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:26,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:27:27,080 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:27:27,081 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-09 05:27:27,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 05:27:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 05:27:27,220 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 05:27:27,220 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 05:27:27,222 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 05:27:27,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:27:27,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:27:27,432 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:27:27,475 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 05:27:27,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 05:27:27 BoogieIcfgContainer [2024-11-09 05:27:27,480 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 05:27:27,480 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 05:27:27,481 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 05:27:27,481 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 05:27:27,482 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:27:05" (3/4) ... [2024-11-09 05:27:27,483 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-09 05:27:27,543 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 05:27:27,543 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 05:27:27,544 INFO L158 Benchmark]: Toolchain (without parser) took 23257.76ms. Allocated memory was 119.5MB in the beginning and 262.1MB in the end (delta: 142.6MB). Free memory was 66.4MB in the beginning and 139.8MB in the end (delta: -73.4MB). Peak memory consumption was 72.3MB. Max. memory is 16.1GB. [2024-11-09 05:27:27,544 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 119.5MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 05:27:27,545 INFO L158 Benchmark]: CACSL2BoogieTranslator took 419.39ms. Allocated memory was 119.5MB in the beginning and 148.9MB in the end (delta: 29.4MB). Free memory was 66.2MB in the beginning and 119.2MB in the end (delta: -53.0MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2024-11-09 05:27:27,545 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.16ms. Allocated memory is still 148.9MB. Free memory was 119.2MB in the beginning and 117.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 05:27:27,546 INFO L158 Benchmark]: Boogie Preprocessor took 28.52ms. Allocated memory is still 148.9MB. Free memory was 117.7MB in the beginning and 116.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 05:27:27,546 INFO L158 Benchmark]: RCFGBuilder took 637.80ms. Allocated memory is still 148.9MB. Free memory was 116.5MB in the beginning and 97.7MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-11-09 05:27:27,547 INFO L158 Benchmark]: TraceAbstraction took 22046.66ms. Allocated memory was 148.9MB in the beginning and 262.1MB in the end (delta: 113.2MB). Free memory was 96.7MB in the beginning and 143.0MB in the end (delta: -46.3MB). Peak memory consumption was 65.4MB. Max. memory is 16.1GB. [2024-11-09 05:27:27,547 INFO L158 Benchmark]: Witness Printer took 62.79ms. Allocated memory is still 262.1MB. Free memory was 143.0MB in the beginning and 139.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 05:27:27,549 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 119.5MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 419.39ms. Allocated memory was 119.5MB in the beginning and 148.9MB in the end (delta: 29.4MB). Free memory was 66.2MB in the beginning and 119.2MB in the end (delta: -53.0MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.16ms. Allocated memory is still 148.9MB. Free memory was 119.2MB in the beginning and 117.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.52ms. Allocated memory is still 148.9MB. Free memory was 117.7MB in the beginning and 116.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 637.80ms. Allocated memory is still 148.9MB. Free memory was 116.5MB in the beginning and 97.7MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 22046.66ms. Allocated memory was 148.9MB in the beginning and 262.1MB in the end (delta: 113.2MB). Free memory was 96.7MB in the beginning and 143.0MB in the end (delta: -46.3MB). Peak memory consumption was 65.4MB. Max. memory is 16.1GB. * Witness Printer took 62.79ms. Allocated memory is still 262.1MB. Free memory was 143.0MB in the beginning and 139.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [a=10, b=20, counter=0, p=1, q=0, x=10, y=20] [L33] EXPR counter++ VAL [a=10, b=20, counter=1, p=1, q=0, x=10, y=20] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=10, b=20, counter=1, p=1, q=0, x=10, y=20] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=5, b=10, counter=1, p=4, q=0, x=10, y=20] [L33] EXPR counter++ VAL [a=5, b=10, counter=2, p=4, q=0, x=10, y=20] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=5, b=10, counter=2, p=4, q=0, x=10, y=20] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p VAL [a=4, b=10, counter=2, p=4, q=40, x=10, y=20] [L33] EXPR counter++ VAL [a=4, b=10, counter=3, p=4, q=40, x=10, y=20] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=4, b=10, counter=3, p=4, q=40, x=10, y=20] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=2, b=5, counter=3, p=16, q=40, x=10, y=20] [L33] EXPR counter++ VAL [a=2, b=5, counter=4, p=16, q=40, x=10, y=20] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=2, b=5, counter=4, p=16, q=40, x=10, y=20] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND TRUE a % 2 == 0 && b % 2 == 1 [L47] b = b - 1 [L48] q = q + a * p VAL [a=2, b=4, counter=4, p=16, q=72, x=10, y=20] [L33] EXPR counter++ VAL [a=2, b=4, counter=5, p=16, q=72, x=10, y=20] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=2, b=4, counter=5, p=16, q=72, x=10, y=20] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=1, b=2, counter=5, p=64, q=72, x=10, y=20] [L33] EXPR counter++ VAL [a=1, b=2, counter=6, p=64, q=72, x=10, y=20] [L33] COND FALSE !(counter++<5) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, counter=6] [L14] reach_error() VAL [\old(cond)=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.9s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 50 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 396 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 293 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 316 IncrementalHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 103 mSDtfsCounter, 316 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 246 SyntacticMatches, 13 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=9, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 379 NumberOfCodeBlocks, 379 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 290 ConstructedInterpolants, 2 QuantifiedInterpolants, 1198 SizeOfPredicates, 26 NumberOfNonLiveVariables, 525 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 129/264 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: OVERALL_TIME: 0.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 11, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 17, TOOLS_QUANTIFIERELIM_TIME: 0.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 66, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-09 05:27:27,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea04f56-8878-401e-b606-029a296fad9e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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