./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E --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 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:15:22,614 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:15:22,711 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:15:22,719 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:15:22,720 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:15:22,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:15:22,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:15:22,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:15:22,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:15:22,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:15:22,761 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:15:22,761 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:15:22,761 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:15:22,762 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:15:22,762 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:15:22,762 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:15:22,762 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:15:22,763 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:15:22,763 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:15:22,763 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:15:22,764 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:15:22,764 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:15:22,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:15:22,764 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:15:22,765 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:15:22,765 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:15:22,765 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:15:22,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:15:22,766 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:15:22,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:15:22,766 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:15:22,766 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:15:22,766 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:15:22,766 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:15:22,766 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:15:22,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:15:22,767 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:15:22,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:15:22,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:15:22,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:15:22,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:15:22,768 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:15:22,768 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:15:22,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:15:22,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:15:22,768 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:15:22,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:15:22,769 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E 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 -> 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 [2024-11-14 03:15:23,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:15:23,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:15:23,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:15:23,115 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:15:23,116 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:15:23,117 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loop-new/count_by_2.i Unable to find full path for "g++" [2024-11-14 03:15:25,071 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:15:25,316 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:15:25,317 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/sv-benchmarks/c/loop-new/count_by_2.i [2024-11-14 03:15:25,324 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/data/393a2e464/fb1ab2cbd8344e73bf65ceeb07e14a4b/FLAGe7133d198 [2024-11-14 03:15:25,337 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/data/393a2e464/fb1ab2cbd8344e73bf65ceeb07e14a4b [2024-11-14 03:15:25,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:15:25,341 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:15:25,342 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:15:25,343 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:15:25,346 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:15:25,347 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,347 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@413cd811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25, skipping insertion in model container [2024-11-14 03:15:25,348 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,362 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:15:25,556 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_e7b7f64c-5ef7-4072-93bb-953d955fd58b/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2024-11-14 03:15:25,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:15:25,581 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:15:25,595 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_e7b7f64c-5ef7-4072-93bb-953d955fd58b/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2024-11-14 03:15:25,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:15:25,622 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:15:25,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25 WrapperNode [2024-11-14 03:15:25,623 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:15:25,624 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:15:25,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:15:25,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:15:25,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,661 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 23 [2024-11-14 03:15:25,662 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:15:25,663 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:15:25,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:15:25,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:15:25,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,673 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,677 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,681 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,682 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,687 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:15:25,688 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:15:25,688 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:15:25,688 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:15:25,689 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (1/1) ... [2024-11-14 03:15:25,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:15:25,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:25,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:15:25,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:15:25,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:15:25,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:15:25,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:15:25,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:15:25,831 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:15:25,833 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:15:25,944 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-14 03:15:25,944 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:15:25,974 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:15:25,975 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 03:15:25,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:15:25 BoogieIcfgContainer [2024-11-14 03:15:25,978 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:15:25,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:15:25,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:15:25,986 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:15:25,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:15:25" (1/3) ... [2024-11-14 03:15:25,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3018185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:15:25, skipping insertion in model container [2024-11-14 03:15:25,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:25" (2/3) ... [2024-11-14 03:15:25,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3018185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:15:25, skipping insertion in model container [2024-11-14 03:15:25,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:15:25" (3/3) ... [2024-11-14 03:15:25,991 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2024-11-14 03:15:26,010 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:15:26,012 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG count_by_2.i that has 1 procedures, 7 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 03:15:26,071 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:15:26,085 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;@1ebec7e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:15:26,086 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:15:26,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:15:26,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:26,100 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:15:26,100 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:26,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:26,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1849510, now seen corresponding path program 1 times [2024-11-14 03:15:26,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:26,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63045826] [2024-11-14 03:15:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:26,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:26,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63045826] [2024-11-14 03:15:26,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63045826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:26,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:26,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:15:26,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411071110] [2024-11-14 03:15:26,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:26,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:26,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:26,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:26,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:15:26,300 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:26,326 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2024-11-14 03:15:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 03:15:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:26,337 INFO L225 Difference]: With dead ends: 13 [2024-11-14 03:15:26,337 INFO L226 Difference]: Without dead ends: 6 [2024-11-14 03:15:26,340 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:15:26,343 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:26,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:15:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2024-11-14 03:15:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2024-11-14 03:15:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2024-11-14 03:15:26,374 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2024-11-14 03:15:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:26,375 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2024-11-14 03:15:26,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2024-11-14 03:15:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:15:26,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:26,375 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 03:15:26,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:15:26,376 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:26,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash 56664950, now seen corresponding path program 1 times [2024-11-14 03:15:26,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:26,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462921135] [2024-11-14 03:15:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:26,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:26,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:26,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462921135] [2024-11-14 03:15:26,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462921135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:26,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638443323] [2024-11-14 03:15:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:26,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:26,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:26,496 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:26,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:15:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:26,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:15:26,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:26,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:26,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638443323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:26,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226986458] [2024-11-14 03:15:26,688 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 03:15:26,688 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:26,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:26,697 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:26,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:26,915 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:26,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:15:26,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:26,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:26,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-14 03:15:26,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127431959] [2024-11-14 03:15:26,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:26,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:15:26,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:26,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:15:26,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:15:26,994 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:27,029 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2024-11-14 03:15:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:15:27,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 03:15:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:27,031 INFO L225 Difference]: With dead ends: 12 [2024-11-14 03:15:27,031 INFO L226 Difference]: Without dead ends: 9 [2024-11-14 03:15:27,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:15:27,032 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:27,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:15:27,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-14 03:15:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-14 03:15:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2024-11-14 03:15:27,038 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2024-11-14 03:15:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:27,038 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2024-11-14 03:15:27,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2024-11-14 03:15:27,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 03:15:27,039 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:27,039 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2024-11-14 03:15:27,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 03:15:27,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:27,240 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:27,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:27,240 INFO L85 PathProgramCache]: Analyzing trace with hash -481792858, now seen corresponding path program 2 times [2024-11-14 03:15:27,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:27,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432487332] [2024-11-14 03:15:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:27,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:27,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432487332] [2024-11-14 03:15:27,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432487332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376334372] [2024-11-14 03:15:27,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:27,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:27,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:27,358 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:27,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:15:27,402 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:15:27,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:27,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:15:27,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:27,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:27,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376334372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:27,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270000732] [2024-11-14 03:15:27,559 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 03:15:27,562 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:27,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:27,562 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:27,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:27,673 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:27,758 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '156#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:15:27,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:27,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:27,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-14 03:15:27,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771889818] [2024-11-14 03:15:27,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:27,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:15:27,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:27,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:15:27,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:15:27,762 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:27,797 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2024-11-14 03:15:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:15:27,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 03:15:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:27,799 INFO L225 Difference]: With dead ends: 18 [2024-11-14 03:15:27,799 INFO L226 Difference]: Without dead ends: 15 [2024-11-14 03:15:27,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:15:27,800 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:27,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:15:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-14 03:15:27,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-14 03:15:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-11-14 03:15:27,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2024-11-14 03:15:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:27,805 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-11-14 03:15:27,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-11-14 03:15:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 03:15:27,805 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:27,805 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2024-11-14 03:15:27,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:15:28,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:28,010 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:28,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:28,011 INFO L85 PathProgramCache]: Analyzing trace with hash -942802266, now seen corresponding path program 3 times [2024-11-14 03:15:28,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:28,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10706308] [2024-11-14 03:15:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:28,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:28,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:28,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10706308] [2024-11-14 03:15:28,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10706308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:28,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089547913] [2024-11-14 03:15:28,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:15:28,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:28,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:28,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:28,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:15:28,385 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:15:28,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:28,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:15:28,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:28,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:28,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089547913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:28,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904263240] [2024-11-14 03:15:28,796 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 03:15:28,796 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:28,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:28,797 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:28,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:28,878 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:28,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '316#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:15:28,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:28,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:28,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2024-11-14 03:15:28,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291688965] [2024-11-14 03:15:28,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:28,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 03:15:28,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 03:15:28,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:15:28,956 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:29,006 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2024-11-14 03:15:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 03:15:29,009 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 03:15:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:29,011 INFO L225 Difference]: With dead ends: 30 [2024-11-14 03:15:29,012 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 03:15:29,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:15:29,014 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:29,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:15:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 03:15:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 03:15:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2024-11-14 03:15:29,026 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2024-11-14 03:15:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:29,027 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2024-11-14 03:15:29,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2024-11-14 03:15:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 03:15:29,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:29,028 INFO L215 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2024-11-14 03:15:29,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:15:29,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:29,228 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:29,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash 470914726, now seen corresponding path program 4 times [2024-11-14 03:15:29,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:29,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829278478] [2024-11-14 03:15:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:29,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:30,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829278478] [2024-11-14 03:15:30,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829278478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192107406] [2024-11-14 03:15:30,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:15:30,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:30,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:30,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:30,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:15:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:30,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 03:15:30,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:30,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:31,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192107406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:31,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525722591] [2024-11-14 03:15:31,339 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 03:15:31,339 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:31,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:31,340 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:31,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:31,409 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:31,511 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '620#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:15:31,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:31,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:31,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2024-11-14 03:15:31,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181739426] [2024-11-14 03:15:31,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:31,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-14 03:15:31,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-14 03:15:31,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 03:15:31,518 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:31,623 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2024-11-14 03:15:31,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 03:15:31,625 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-14 03:15:31,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:31,626 INFO L225 Difference]: With dead ends: 54 [2024-11-14 03:15:31,626 INFO L226 Difference]: Without dead ends: 51 [2024-11-14 03:15:31,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 03:15:31,630 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:31,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-14 03:15:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-14 03:15:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2024-11-14 03:15:31,642 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2024-11-14 03:15:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:31,643 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2024-11-14 03:15:31,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2024-11-14 03:15:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:15:31,645 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:31,645 INFO L215 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2024-11-14 03:15:31,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:15:31,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:31,846 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:31,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:31,846 INFO L85 PathProgramCache]: Analyzing trace with hash -436547930, now seen corresponding path program 5 times [2024-11-14 03:15:31,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:31,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276783629] [2024-11-14 03:15:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:31,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:33,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276783629] [2024-11-14 03:15:33,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276783629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79341482] [2024-11-14 03:15:33,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:33,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:33,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:33,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:15:33,852 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-14 03:15:33,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:33,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 03:15:33,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:34,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:37,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79341482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:37,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102787001] [2024-11-14 03:15:37,261 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 03:15:37,261 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:37,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:37,262 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:37,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:37,314 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:37,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1212#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:15:37,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:37,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:37,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2024-11-14 03:15:37,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031513327] [2024-11-14 03:15:37,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:37,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-14 03:15:37,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:37,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-14 03:15:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4568, Invalid=5134, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 03:15:37,460 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:37,622 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2024-11-14 03:15:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-14 03:15:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-14 03:15:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:37,624 INFO L225 Difference]: With dead ends: 102 [2024-11-14 03:15:37,624 INFO L226 Difference]: Without dead ends: 99 [2024-11-14 03:15:37,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4568, Invalid=5134, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 03:15:37,629 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:37,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-14 03:15:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-14 03:15:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2024-11-14 03:15:37,641 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2024-11-14 03:15:37,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:37,641 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2024-11-14 03:15:37,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2024-11-14 03:15:37,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-14 03:15:37,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:37,643 INFO L215 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2024-11-14 03:15:37,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:15:37,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 03:15:37,844 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:37,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1666530982, now seen corresponding path program 6 times [2024-11-14 03:15:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:37,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905763181] [2024-11-14 03:15:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:37,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:43,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905763181] [2024-11-14 03:15:43,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905763181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59984939] [2024-11-14 03:15:43,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:15:43,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:43,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:43,391 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:43,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:15:43,480 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:15:43,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:43,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-14 03:15:43,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:43,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:15:54,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59984939] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424179255] [2024-11-14 03:15:54,968 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 03:15:54,968 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:54,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:54,968 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:54,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:55,005 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:55,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2380#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:15:55,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:55,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:55,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2024-11-14 03:15:55,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527946655] [2024-11-14 03:15:55,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:55,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2024-11-14 03:15:55,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:55,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2024-11-14 03:15:55,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18344, Invalid=19486, Unknown=0, NotChecked=0, Total=37830 [2024-11-14 03:15:55,224 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 192 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 191 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:55,792 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2024-11-14 03:15:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-14 03:15:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 191 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-11-14 03:15:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:55,795 INFO L225 Difference]: With dead ends: 198 [2024-11-14 03:15:55,795 INFO L226 Difference]: Without dead ends: 195 [2024-11-14 03:15:55,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=18344, Invalid=19486, Unknown=0, NotChecked=0, Total=37830 [2024-11-14 03:15:55,800 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:55,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:15:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-14 03:15:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2024-11-14 03:15:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2024-11-14 03:15:55,818 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2024-11-14 03:15:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:55,819 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2024-11-14 03:15:55,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 191 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2024-11-14 03:15:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-14 03:15:55,827 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:55,827 INFO L215 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2024-11-14 03:15:55,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:15:56,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 03:15:56,028 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:56,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:56,029 INFO L85 PathProgramCache]: Analyzing trace with hash 606740134, now seen corresponding path program 7 times [2024-11-14 03:15:56,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:56,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323117395] [2024-11-14 03:15:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:56,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:15,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:15,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323117395] [2024-11-14 03:16:15,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323117395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:15,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229038095] [2024-11-14 03:16:15,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:16:15,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:15,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:15,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:15,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:16:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:15,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-11-14 03:16:15,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:16:16,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:17:02,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229038095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:02,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778122232] [2024-11-14 03:17:02,086 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 03:17:02,086 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:02,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:02,087 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:02,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:02,116 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:02,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4700#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:17:02,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:02,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:02,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2024-11-14 03:17:02,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528738095] [2024-11-14 03:17:02,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:02,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2024-11-14 03:17:02,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:02,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2024-11-14 03:17:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73544, Invalid=75838, Unknown=0, NotChecked=0, Total=149382 [2024-11-14 03:17:02,469 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 384 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 383 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:04,386 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2024-11-14 03:17:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2024-11-14 03:17:04,388 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 383 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2024-11-14 03:17:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:04,391 INFO L225 Difference]: With dead ends: 390 [2024-11-14 03:17:04,391 INFO L226 Difference]: Without dead ends: 387 [2024-11-14 03:17:04,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 60.5s TimeCoverageRelationStatistics Valid=73544, Invalid=75838, Unknown=0, NotChecked=0, Total=149382 [2024-11-14 03:17:04,397 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:04,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:17:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-11-14 03:17:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2024-11-14 03:17:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:04,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2024-11-14 03:17:04,429 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2024-11-14 03:17:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:04,430 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2024-11-14 03:17:04,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 383 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:04,431 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2024-11-14 03:17:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2024-11-14 03:17:04,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:04,437 INFO L215 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2024-11-14 03:17:04,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:17:04,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:04,638 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:17:04,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:04,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1101799770, now seen corresponding path program 8 times [2024-11-14 03:17:04,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:04,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497397627] [2024-11-14 03:17:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:04,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:18:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:21,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:18:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497397627] [2024-11-14 03:18:21,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497397627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:18:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115486922] [2024-11-14 03:18:21,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:18:21,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:18:21,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:18:21,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:18:21,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:18:22,669 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2024-11-14 03:18:22,669 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:18:22,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 384 conjuncts are in the unsatisfiable core [2024-11-14 03:18:22,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:18:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:18:23,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:21:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:21:34,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115486922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:21:34,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575719176] [2024-11-14 03:21:34,550 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 03:21:34,550 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:21:34,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:21:34,551 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:21:34,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:21:34,580 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:21:35,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9324#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:21:35,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:21:35,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:21:35,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2024-11-14 03:21:35,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147435914] [2024-11-14 03:21:35,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:21:35,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2024-11-14 03:21:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:21:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2024-11-14 03:21:35,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294536, Invalid=299134, Unknown=0, NotChecked=0, Total=593670 [2024-11-14 03:21:35,304 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 768 states, 768 states have (on average 1.0026041666666667) internal successors, (770), 767 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:21:53,039 INFO L93 Difference]: Finished difference Result 774 states and 1157 transitions. [2024-11-14 03:21:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2024-11-14 03:21:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 768 states have (on average 1.0026041666666667) internal successors, (770), 767 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2024-11-14 03:21:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:21:53,045 INFO L225 Difference]: With dead ends: 774 [2024-11-14 03:21:53,045 INFO L226 Difference]: Without dead ends: 771 [2024-11-14 03:21:53,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1540 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 769 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3441 ImplicationChecksByTransitivity, 250.6s TimeCoverageRelationStatistics Valid=294536, Invalid=299134, Unknown=0, NotChecked=0, Total=593670 [2024-11-14 03:21:53,061 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:21:53,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:21:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2024-11-14 03:21:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2024-11-14 03:21:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:53,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2024-11-14 03:21:53,104 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2024-11-14 03:21:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:53,105 INFO L471 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2024-11-14 03:21:53,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 768 states have (on average 1.0026041666666667) internal successors, (770), 767 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:21:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2024-11-14 03:21:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2024-11-14 03:21:53,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:53,131 INFO L215 NwaCegarLoop]: trace histogram [766, 1, 1, 1, 1] [2024-11-14 03:21:53,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 03:21:53,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:21:53,331 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:53,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:53,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1420254886, now seen corresponding path program 9 times [2024-11-14 03:21:53,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:53,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814987452] [2024-11-14 03:21:53,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:53,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 293761 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:28:39,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:28:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814987452] [2024-11-14 03:28:39,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814987452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:28:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291653403] [2024-11-14 03:28:39,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:28:39,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:39,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:28:39,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:28:39,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7b7f64c-5ef7-4072-93bb-953d955fd58b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:28:39,954 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:28:39,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:28:39,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 2323 conjuncts, 768 conjuncts are in the unsatisfiable core [2024-11-14 03:28:40,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:28:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 293761 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:28:41,578 INFO L311 TraceCheckSpWp]: Computing backward predicates...