./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_nondet.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_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/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_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_nondet.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/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_84704ac1-b538-40ff-bd57-393da62678e7/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 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:36:35,956 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:36:36,054 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:36:36,063 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:36:36,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:36:36,101 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:36:36,103 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:36:36,103 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:36:36,104 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:36:36,104 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:36:36,105 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:36:36,105 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:36:36,105 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:36:36,105 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:36:36,105 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:36:36,106 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:36:36,106 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:36:36,106 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:36:36,106 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:36:36,106 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:36:36,107 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:36:36,107 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:36:36,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:36:36,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:36:36,107 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:36:36,108 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:36:36,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:36:36,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:36:36,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:36:36,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:36:36,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:36:36,109 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:36:36,109 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:36:36,109 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:36:36,109 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:36:36,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:36:36,110 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:36:36,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:36:36,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:36:36,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:36:36,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:36:36,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:36:36,111 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:36:36,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:36:36,111 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:36:36,111 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:36:36,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:36:36,111 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_84704ac1-b538-40ff-bd57-393da62678e7/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 -> 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d [2024-11-14 03:36:36,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:36:36,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:36:36,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:36:36,467 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:36:36,467 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:36:36,468 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loop-new/count_by_nondet.i Unable to find full path for "g++" [2024-11-14 03:36:38,324 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:36:38,562 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:36:38,566 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/sv-benchmarks/c/loop-new/count_by_nondet.i [2024-11-14 03:36:38,575 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/data/8c7058904/f7129ca6d004487b81d269ea23608929/FLAGfe918e852 [2024-11-14 03:36:38,599 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/data/8c7058904/f7129ca6d004487b81d269ea23608929 [2024-11-14 03:36:38,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:36:38,605 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:36:38,607 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:36:38,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:36:38,614 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:36:38,615 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb4dd68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38, skipping insertion in model container [2024-11-14 03:36:38,618 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,635 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:36:38,810 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_84704ac1-b538-40ff-bd57-393da62678e7/sv-benchmarks/c/loop-new/count_by_nondet.i[891,904] [2024-11-14 03:36:38,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:36:38,838 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:36:38,855 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_84704ac1-b538-40ff-bd57-393da62678e7/sv-benchmarks/c/loop-new/count_by_nondet.i[891,904] [2024-11-14 03:36:38,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:36:38,877 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:36:38,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38 WrapperNode [2024-11-14 03:36:38,878 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:36:38,880 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:36:38,881 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:36:38,881 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:36:38,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,895 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,912 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2024-11-14 03:36:38,913 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:36:38,914 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:36:38,914 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:36:38,914 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:36:38,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,923 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,924 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,926 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:36:38,940 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:36:38,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:36:38,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:36:38,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (1/1) ... [2024-11-14 03:36:38,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:36:38,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:38,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:36:38,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:36:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:36:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:36:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:36:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:36:39,091 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:36:39,093 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:36:39,199 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-14 03:36:39,199 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:36:39,223 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:36:39,224 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 03:36:39,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:36:39 BoogieIcfgContainer [2024-11-14 03:36:39,224 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:36:39,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:36:39,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:36:39,232 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:36:39,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:36:38" (1/3) ... [2024-11-14 03:36:39,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b202b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:36:39, skipping insertion in model container [2024-11-14 03:36:39,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:38" (2/3) ... [2024-11-14 03:36:39,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b202b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:36:39, skipping insertion in model container [2024-11-14 03:36:39,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:36:39" (3/3) ... [2024-11-14 03:36:39,235 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2024-11-14 03:36:39,252 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:36:39,255 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG count_by_nondet.i that has 1 procedures, 9 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 03:36:39,324 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:36:39,339 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;@31f8769, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:36:39,339 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:36:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 03:36:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:36:39,351 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:39,351 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:36:39,352 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:39,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:39,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1972678, now seen corresponding path program 1 times [2024-11-14 03:36:39,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:39,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232132771] [2024-11-14 03:36:39,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:39,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:39,628 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 03:36:39,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:39,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232132771] [2024-11-14 03:36:39,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232132771] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:36:39,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:36:39,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:36:39,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843662579] [2024-11-14 03:36:39,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:36:39,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:36:39,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:39,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:36:39,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:36:39,668 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 03:36:39,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:39,710 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2024-11-14 03:36:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:36:39,714 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 03:36:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:39,720 INFO L225 Difference]: With dead ends: 18 [2024-11-14 03:36:39,720 INFO L226 Difference]: Without dead ends: 8 [2024-11-14 03:36:39,724 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 03:36:39,729 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:39,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:36:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-14 03:36:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2024-11-14 03:36:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 03:36:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2024-11-14 03:36:39,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2024-11-14 03:36:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:39,764 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2024-11-14 03:36:39,765 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 03:36:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2024-11-14 03:36:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 03:36:39,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:39,765 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 03:36:39,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:36:39,766 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:39,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1870613153, now seen corresponding path program 1 times [2024-11-14 03:36:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:39,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251343635] [2024-11-14 03:36:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:39,910 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 03:36:39,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251343635] [2024-11-14 03:36:39,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251343635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136922775] [2024-11-14 03:36:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:39,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:39,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:39,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:39,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:36:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:39,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:36:39,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:40,025 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 03:36:40,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:40,055 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 03:36:40,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136922775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [997330939] [2024-11-14 03:36:40,073 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:36:40,073 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:40,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:40,081 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:40,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:40,365 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:40,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '81#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:36:40,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:40,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:40,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2024-11-14 03:36:40,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794321929] [2024-11-14 03:36:40,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:40,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:36:40,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:40,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:36:40,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:36:40,470 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 03:36:40,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:40,505 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2024-11-14 03:36:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:36:40,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) Word has length 6 [2024-11-14 03:36:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:40,506 INFO L225 Difference]: With dead ends: 12 [2024-11-14 03:36:40,506 INFO L226 Difference]: Without dead ends: 9 [2024-11-14 03:36:40,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:36:40,507 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:40,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:36:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-14 03:36:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-14 03:36:40,509 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 03:36:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2024-11-14 03:36:40,510 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2024-11-14 03:36:40,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:40,510 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2024-11-14 03:36:40,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 03:36:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2024-11-14 03:36:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 03:36:40,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:40,511 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-14 03:36:40,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:36:40,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:40,715 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:40,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1957187396, now seen corresponding path program 2 times [2024-11-14 03:36:40,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:40,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334665940] [2024-11-14 03:36:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:40,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:40,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:40,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334665940] [2024-11-14 03:36:40,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334665940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:40,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634911301] [2024-11-14 03:36:40,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:36:40,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:40,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:40,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:40,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:36:40,948 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:36:40,948 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:36:40,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:36:40,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:40,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:41,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634911301] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:41,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029269870] [2024-11-14 03:36:41,055 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:36:41,056 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:41,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:41,057 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:41,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:41,258 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:41,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:36:41,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:41,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:41,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-14 03:36:41,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221886689] [2024-11-14 03:36:41,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:41,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:36:41,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:41,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:36:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:36:41,395 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:36:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:41,439 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-14 03:36:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:36:41,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 03:36:41,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:41,441 INFO L225 Difference]: With dead ends: 21 [2024-11-14 03:36:41,441 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 03:36:41,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:36:41,442 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:41,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:36:41,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 03:36:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2024-11-14 03:36:41,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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 03:36:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2024-11-14 03:36:41,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2024-11-14 03:36:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:41,450 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2024-11-14 03:36:41,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:36:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2024-11-14 03:36:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:36:41,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:41,451 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2024-11-14 03:36:41,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:36:41,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:41,653 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:41,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash -161014360, now seen corresponding path program 3 times [2024-11-14 03:36:41,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:41,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359248427] [2024-11-14 03:36:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:41,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:41,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359248427] [2024-11-14 03:36:41,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359248427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:41,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950133310] [2024-11-14 03:36:41,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:36:41,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:41,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:41,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:41,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:36:41,983 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:36:41,983 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:36:41,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:36:41,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:42,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:42,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950133310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:42,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254717591] [2024-11-14 03:36:42,237 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:36:42,237 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:42,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:42,238 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:42,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:42,353 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:42,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '330#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:36:42,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:42,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:42,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-11-14 03:36:42,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290089265] [2024-11-14 03:36:42,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:42,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:36:42,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:42,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:36:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2024-11-14 03:36:42,480 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 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 03:36:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:42,525 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2024-11-14 03:36:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:36:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 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 16 [2024-11-14 03:36:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:42,526 INFO L225 Difference]: With dead ends: 37 [2024-11-14 03:36:42,526 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 03:36:42,527 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2024-11-14 03:36:42,528 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:42,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:36:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 03:36:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2024-11-14 03:36:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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 03:36:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2024-11-14 03:36:42,533 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 16 [2024-11-14 03:36:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:42,534 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2024-11-14 03:36:42,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 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 03:36:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2024-11-14 03:36:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 03:36:42,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:42,535 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1] [2024-11-14 03:36:42,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:36:42,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:42,735 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:42,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:42,736 INFO L85 PathProgramCache]: Analyzing trace with hash -474942592, now seen corresponding path program 4 times [2024-11-14 03:36:42,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:42,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783742836] [2024-11-14 03:36:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:42,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:43,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:43,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783742836] [2024-11-14 03:36:43,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783742836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:43,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274394885] [2024-11-14 03:36:43,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:36:43,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:43,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:43,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:43,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:36:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:43,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:36:43,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:43,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274394885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:44,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [854399839] [2024-11-14 03:36:44,104 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:36:44,105 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:44,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:44,106 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:44,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:44,206 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:44,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '655#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:36:44,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:44,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:44,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2024-11-14 03:36:44,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728812489] [2024-11-14 03:36:44,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:44,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 03:36:44,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 03:36:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 03:36:44,349 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 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 03:36:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:44,436 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2024-11-14 03:36:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 03:36:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 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 32 [2024-11-14 03:36:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:44,438 INFO L225 Difference]: With dead ends: 69 [2024-11-14 03:36:44,439 INFO L226 Difference]: Without dead ends: 66 [2024-11-14 03:36:44,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 03:36:44,441 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:44,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:36:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-14 03:36:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-11-14 03:36:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 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 03:36:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2024-11-14 03:36:44,457 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 32 [2024-11-14 03:36:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:44,457 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2024-11-14 03:36:44,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 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 03:36:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2024-11-14 03:36:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 03:36:44,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:44,459 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1] [2024-11-14 03:36:44,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:36:44,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:44,660 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:44,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1161785552, now seen corresponding path program 5 times [2024-11-14 03:36:44,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:44,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272136045] [2024-11-14 03:36:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:44,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:46,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:46,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272136045] [2024-11-14 03:36:46,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272136045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:46,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335044145] [2024-11-14 03:36:46,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:36:46,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:46,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:46,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:36:46,181 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2024-11-14 03:36:46,181 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:36:46,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 03:36:46,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:46,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:48,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335044145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:48,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1879512760] [2024-11-14 03:36:48,215 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:36:48,215 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:48,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:48,216 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:48,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:48,302 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:48,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1300#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:36:48,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:48,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:48,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2024-11-14 03:36:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095299996] [2024-11-14 03:36:48,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:48,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-14 03:36:48,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:48,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-14 03:36:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2097, Invalid=2873, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 03:36:48,458 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 67 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 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 03:36:48,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:48,591 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2024-11-14 03:36:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-14 03:36:48,592 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 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 64 [2024-11-14 03:36:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:48,594 INFO L225 Difference]: With dead ends: 133 [2024-11-14 03:36:48,596 INFO L226 Difference]: Without dead ends: 130 [2024-11-14 03:36:48,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2097, Invalid=2873, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 03:36:48,599 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:48,600 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 77 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:36:48,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-14 03:36:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2024-11-14 03:36:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 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 03:36:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2024-11-14 03:36:48,623 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 64 [2024-11-14 03:36:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:48,623 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2024-11-14 03:36:48,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 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 03:36:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2024-11-14 03:36:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:36:48,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:48,626 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1] [2024-11-14 03:36:48,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:36:48,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:48,827 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:48,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash -112228720, now seen corresponding path program 6 times [2024-11-14 03:36:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:48,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626521599] [2024-11-14 03:36:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:48,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:52,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:52,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626521599] [2024-11-14 03:36:52,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626521599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:52,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747805922] [2024-11-14 03:36:52,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:36:52,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:52,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:52,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:52,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:36:52,784 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:36:52,784 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:36:52,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-14 03:36:52,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:53,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:58,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747805922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [123987449] [2024-11-14 03:36:58,429 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:36:58,429 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:58,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:58,429 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:58,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:58,498 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:58,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2585#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:36:58,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:58,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:58,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2024-11-14 03:36:58,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849923517] [2024-11-14 03:36:58,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:58,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-14 03:36:58,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-14 03:36:58,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8273, Invalid=9817, Unknown=0, NotChecked=0, Total=18090 [2024-11-14 03:36:58,749 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 130 states have internal predecessors, (259), 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 03:36:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:59,155 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2024-11-14 03:36:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-11-14 03:36:59,156 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 130 states have internal predecessors, (259), 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 128 [2024-11-14 03:36:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:59,158 INFO L225 Difference]: With dead ends: 261 [2024-11-14 03:36:59,158 INFO L226 Difference]: Without dead ends: 258 [2024-11-14 03:36:59,162 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=8273, Invalid=9817, Unknown=0, NotChecked=0, Total=18090 [2024-11-14 03:36:59,163 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:59,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 142 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:36:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-14 03:36:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2024-11-14 03:36:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.00390625) internal successors, (257), 256 states have internal predecessors, (257), 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 03:36:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2024-11-14 03:36:59,181 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 128 [2024-11-14 03:36:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:59,182 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2024-11-14 03:36:59,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9770992366412214) internal successors, (259), 130 states have internal predecessors, (259), 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 03:36:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2024-11-14 03:36:59,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-14 03:36:59,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:59,186 INFO L215 NwaCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1] [2024-11-14 03:36:59,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:36:59,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:59,390 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:59,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1406372528, now seen corresponding path program 7 times [2024-11-14 03:36:59,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:59,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820656704] [2024-11-14 03:36:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:59,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:37:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:37:10,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:37:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820656704] [2024-11-14 03:37:10,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820656704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:37:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205953619] [2024-11-14 03:37:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:37:10,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:37:10,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:37:10,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:37:10,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:37:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:37:11,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-14 03:37:11,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:37:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:37:11,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:37:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:37:31,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205953619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:37:31,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502149056] [2024-11-14 03:37:31,572 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:37:31,572 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:37:31,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:37:31,573 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:37:31,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:37:31,627 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:37:31,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5150#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:37:31,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:37:31,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:37:31,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 258 [2024-11-14 03:37:31,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733762800] [2024-11-14 03:37:31,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:37:31,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 259 states [2024-11-14 03:37:31,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:37:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 259 interpolants. [2024-11-14 03:37:31,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32913, Invalid=35993, Unknown=0, NotChecked=0, Total=68906 [2024-11-14 03:37:31,974 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand has 259 states, 259 states have (on average 1.9884169884169884) internal successors, (515), 258 states have internal predecessors, (515), 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 03:37:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:37:33,294 INFO L93 Difference]: Finished difference Result 517 states and 644 transitions. [2024-11-14 03:37:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2024-11-14 03:37:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 259 states, 259 states have (on average 1.9884169884169884) internal successors, (515), 258 states have internal predecessors, (515), 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 256 [2024-11-14 03:37:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:37:33,298 INFO L225 Difference]: With dead ends: 517 [2024-11-14 03:37:33,299 INFO L226 Difference]: Without dead ends: 514 [2024-11-14 03:37:33,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 633 SyntacticMatches, 1 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=32913, Invalid=35993, Unknown=0, NotChecked=0, Total=68906 [2024-11-14 03:37:33,303 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:37:33,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 273 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:37:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2024-11-14 03:37:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 513. [2024-11-14 03:37:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.001953125) internal successors, (513), 512 states have internal predecessors, (513), 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 03:37:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 513 transitions. [2024-11-14 03:37:33,333 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 513 transitions. Word has length 256 [2024-11-14 03:37:33,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:37:33,333 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 513 transitions. [2024-11-14 03:37:33,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 259 states, 259 states have (on average 1.9884169884169884) internal successors, (515), 258 states have internal predecessors, (515), 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 03:37:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 513 transitions. [2024-11-14 03:37:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2024-11-14 03:37:33,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:37:33,354 INFO L215 NwaCegarLoop]: trace histogram [254, 254, 1, 1, 1, 1] [2024-11-14 03:37:33,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:37:33,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:37:33,554 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:37:33,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:37:33,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1998433584, now seen corresponding path program 8 times [2024-11-14 03:37:33,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:37:33,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139009147] [2024-11-14 03:37:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:37:33,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:37:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:38:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:38:14,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:38:14,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139009147] [2024-11-14 03:38:14,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139009147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:38:14,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062481839] [2024-11-14 03:38:14,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:38:14,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:38:14,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:38:14,009 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:38:14,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:38:15,395 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 255 check-sat command(s) [2024-11-14 03:38:15,395 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:38:15,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 2313 conjuncts, 257 conjuncts are in the unsatisfiable core [2024-11-14 03:38:15,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:38:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:38:16,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:39:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:39:37,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062481839] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:39:37,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362398047] [2024-11-14 03:39:37,542 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:39:37,542 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:39:37,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:39:37,543 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:39:37,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:39:37,604 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:39:38,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10275#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:39:38,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:39:38,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:39:38,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [257, 257, 257] total 514 [2024-11-14 03:39:38,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101117736] [2024-11-14 03:39:38,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:39:38,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 515 states [2024-11-14 03:39:38,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:39:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 515 interpolants. [2024-11-14 03:39:38,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131345, Invalid=137497, Unknown=0, NotChecked=0, Total=268842 [2024-11-14 03:39:38,293 INFO L87 Difference]: Start difference. First operand 513 states and 513 transitions. Second operand has 515 states, 515 states have (on average 1.9941747572815534) internal successors, (1027), 514 states have internal predecessors, (1027), 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 03:39:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:39:48,324 INFO L93 Difference]: Finished difference Result 1029 states and 1284 transitions. [2024-11-14 03:39:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 513 states. [2024-11-14 03:39:48,326 INFO L78 Accepts]: Start accepts. Automaton has has 515 states, 515 states have (on average 1.9941747572815534) internal successors, (1027), 514 states have internal predecessors, (1027), 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 512 [2024-11-14 03:39:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:39:48,331 INFO L225 Difference]: With dead ends: 1029 [2024-11-14 03:39:48,331 INFO L226 Difference]: Without dead ends: 1026 [2024-11-14 03:39:48,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1791 GetRequests, 1273 SyntacticMatches, 1 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5102 ImplicationChecksByTransitivity, 107.2s TimeCoverageRelationStatistics Valid=131345, Invalid=137497, Unknown=0, NotChecked=0, Total=268842 [2024-11-14 03:39:48,338 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:39:48,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 537 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:39:48,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2024-11-14 03:39:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 1025. [2024-11-14 03:39:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 1.0009765625) internal successors, (1025), 1024 states have internal predecessors, (1025), 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 03:39:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1025 transitions. [2024-11-14 03:39:48,383 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1025 transitions. Word has length 512 [2024-11-14 03:39:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:39:48,385 INFO L471 AbstractCegarLoop]: Abstraction has 1025 states and 1025 transitions. [2024-11-14 03:39:48,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 515 states, 515 states have (on average 1.9941747572815534) internal successors, (1027), 514 states have internal predecessors, (1027), 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 03:39:48,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1025 transitions. [2024-11-14 03:39:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1025 [2024-11-14 03:39:48,421 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:39:48,421 INFO L215 NwaCegarLoop]: trace histogram [510, 510, 1, 1, 1, 1] [2024-11-14 03:39:48,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:39:48,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:39:48,622 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:39:48,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:39:48,622 INFO L85 PathProgramCache]: Analyzing trace with hash 507383248, now seen corresponding path program 9 times [2024-11-14 03:39:48,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:39:48,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568743590] [2024-11-14 03:39:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:39:48,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:39:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:43:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:43:04,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:43:04,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568743590] [2024-11-14 03:43:04,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568743590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:43:04,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424902185] [2024-11-14 03:43:04,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:43:04,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:43:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:43:04,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:43:04,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84704ac1-b538-40ff-bd57-393da62678e7/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:43:05,408 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:43:05,409 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:43:05,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 4617 conjuncts, 513 conjuncts are in the unsatisfiable core [2024-11-14 03:43:05,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:43:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:43:07,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:49:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:49:03,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424902185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:49:03,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043152715] [2024-11-14 03:49:03,797 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:49:03,798 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:49:03,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:49:03,798 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:49:03,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:49:03,857 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:49:05,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20520#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 03:49:05,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:49:05,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:49:05,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [513, 513, 513] total 1026 [2024-11-14 03:49:05,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481649154] [2024-11-14 03:49:05,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:49:05,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 1027 states [2024-11-14 03:49:05,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:05,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1027 interpolants. [2024-11-14 03:49:05,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524817, Invalid=537113, Unknown=0, NotChecked=0, Total=1061930 [2024-11-14 03:49:05,646 INFO L87 Difference]: Start difference. First operand 1025 states and 1025 transitions. Second operand has 1027 states, 1027 states have (on average 1.997078870496592) internal successors, (2051), 1026 states have internal predecessors, (2051), 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)