./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de62.c --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_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/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_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de62.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/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_101df43d-1249-486f-9f47-89e160638e96/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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:13:43,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:13:43,127 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:13:43,133 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:13:43,133 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:13:43,160 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:13:43,161 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:13:43,161 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:13:43,161 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:13:43,162 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:13:43,162 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:13:43,162 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:13:43,162 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:13:43,162 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:13:43,162 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:13:43,163 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:13:43,163 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:13:43,163 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:13:43,163 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:13:43,163 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:13:43,164 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:13:43,164 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:13:43,164 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:13:43,164 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:13:43,165 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:13:43,165 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:13:43,165 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:13:43,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:13:43,165 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:13:43,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:13:43,166 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:13:43,166 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:13:43,166 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:13:43,166 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:13:43,166 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:13:43,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:13:43,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:13:43,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:13:43,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:13:43,167 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:13:43,167 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:13:43,167 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:13:43,168 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:13:43,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:13:43,168 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:13:43,168 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:13:43,168 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:13:43,168 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_101df43d-1249-486f-9f47-89e160638e96/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 -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2024-11-14 03:13:43,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:13:43,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:13:43,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:13:43,574 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:13:43,576 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:13:43,578 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loops-crafted-1/in-de62.c Unable to find full path for "g++" [2024-11-14 03:13:45,776 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:13:46,047 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:13:46,048 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-11-14 03:13:46,055 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/data/a4bf4e8df/cd476decb24f4d44b260fa2d2cb84ea7/FLAG364ac353c [2024-11-14 03:13:46,070 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/data/a4bf4e8df/cd476decb24f4d44b260fa2d2cb84ea7 [2024-11-14 03:13:46,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:13:46,074 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:13:46,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:13:46,076 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:13:46,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:13:46,082 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,083 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c317c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46, skipping insertion in model container [2024-11-14 03:13:46,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,100 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:13:46,267 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_101df43d-1249-486f-9f47-89e160638e96/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2024-11-14 03:13:46,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:13:46,309 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:13:46,326 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_101df43d-1249-486f-9f47-89e160638e96/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2024-11-14 03:13:46,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:13:46,358 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:13:46,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46 WrapperNode [2024-11-14 03:13:46,359 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:13:46,360 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:13:46,360 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:13:46,364 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:13:46,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,413 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2024-11-14 03:13:46,413 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:13:46,414 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:13:46,414 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:13:46,414 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:13:46,423 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,424 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,425 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,434 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,440 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,441 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,448 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:13:46,453 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:13:46,453 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:13:46,453 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:13:46,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (1/1) ... [2024-11-14 03:13:46,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:13:46,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:46,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:13:46,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:13:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:13:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:13:46,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:13:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:13:46,627 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:13:46,629 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:13:46,867 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-14 03:13:46,868 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:13:46,940 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:13:46,940 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-14 03:13:46,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:13:46 BoogieIcfgContainer [2024-11-14 03:13:46,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:13:46,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:13:46,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:13:46,955 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:13:46,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:13:46" (1/3) ... [2024-11-14 03:13:46,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7edc345c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:13:46, skipping insertion in model container [2024-11-14 03:13:46,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:13:46" (2/3) ... [2024-11-14 03:13:46,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7edc345c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:13:46, skipping insertion in model container [2024-11-14 03:13:46,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:13:46" (3/3) ... [2024-11-14 03:13:46,960 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2024-11-14 03:13:46,981 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:13:46,983 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG in-de62.c that has 1 procedures, 12 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-14 03:13:47,060 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:13:47,081 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;@c14ffc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:13:47,081 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:13:47,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 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 03:13:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 03:13:47,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:47,095 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:47,096 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:47,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:47,103 INFO L85 PathProgramCache]: Analyzing trace with hash 674655943, now seen corresponding path program 1 times [2024-11-14 03:13:47,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:47,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192435643] [2024-11-14 03:13:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:47,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:47,640 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 03:13:47,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:47,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192435643] [2024-11-14 03:13:47,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192435643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:47,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:13:47,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:13:47,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849360118] [2024-11-14 03:13:47,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:47,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:13:47,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:47,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:13:47,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:13:47,687 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) 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 03:13:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:47,843 INFO L93 Difference]: Finished difference Result 26 states and 41 transitions. [2024-11-14 03:13:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:13:47,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) 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 9 [2024-11-14 03:13:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:47,855 INFO L225 Difference]: With dead ends: 26 [2024-11-14 03:13:47,856 INFO L226 Difference]: Without dead ends: 15 [2024-11-14 03:13:47,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:13:47,868 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:47,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-14 03:13:47,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-14 03:13:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 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 03:13:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2024-11-14 03:13:47,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 9 [2024-11-14 03:13:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:47,914 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2024-11-14 03:13:47,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) 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 03:13:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2024-11-14 03:13:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:13:47,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:47,915 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:47,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:13:47,919 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:47,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:47,922 INFO L85 PathProgramCache]: Analyzing trace with hash -596325435, now seen corresponding path program 1 times [2024-11-14 03:13:47,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:47,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037469787] [2024-11-14 03:13:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:47,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:48,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:48,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037469787] [2024-11-14 03:13:48,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037469787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:48,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:13:48,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:13:48,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097876349] [2024-11-14 03:13:48,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:48,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:13:48,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:13:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:13:48,061 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:13:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:48,125 INFO L93 Difference]: Finished difference Result 25 states and 38 transitions. [2024-11-14 03:13:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:13:48,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2024-11-14 03:13:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:48,127 INFO L225 Difference]: With dead ends: 25 [2024-11-14 03:13:48,127 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 03:13:48,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 03:13:48,128 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:48,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 03:13:48,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-14 03:13:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 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 03:13:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2024-11-14 03:13:48,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 10 [2024-11-14 03:13:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:48,148 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2024-11-14 03:13:48,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:13:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2024-11-14 03:13:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:13:48,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:48,152 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:48,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:13:48,153 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:48,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash -561172055, now seen corresponding path program 1 times [2024-11-14 03:13:48,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:48,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359223280] [2024-11-14 03:13:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:48,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:13:48,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:48,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359223280] [2024-11-14 03:13:48,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359223280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:48,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:13:48,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:13:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011253975] [2024-11-14 03:13:48,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:48,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:13:48,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:13:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:13:48,241 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:13:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:48,329 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2024-11-14 03:13:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:13:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2024-11-14 03:13:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:48,331 INFO L225 Difference]: With dead ends: 43 [2024-11-14 03:13:48,331 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 03:13:48,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 03:13:48,334 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:48,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 03:13:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 03:13:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 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 03:13:48,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2024-11-14 03:13:48,346 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 42 transitions. Word has length 10 [2024-11-14 03:13:48,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:48,346 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 42 transitions. [2024-11-14 03:13:48,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:13:48,347 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 42 transitions. [2024-11-14 03:13:48,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:13:48,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:48,347 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:48,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:13:48,348 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:48,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1431153687, now seen corresponding path program 1 times [2024-11-14 03:13:48,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:48,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327348996] [2024-11-14 03:13:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:48,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:48,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:48,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327348996] [2024-11-14 03:13:48,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327348996] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:48,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:13:48,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:13:48,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820702499] [2024-11-14 03:13:48,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:48,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:13:48,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:13:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:13:48,521 INFO L87 Difference]: Start difference. First operand 28 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:48,614 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-11-14 03:13:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:13:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 03:13:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:48,615 INFO L225 Difference]: With dead ends: 36 [2024-11-14 03:13:48,615 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 03:13:48,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:13:48,617 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:48,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 03:13:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-14 03:13:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 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 03:13:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 37 transitions. [2024-11-14 03:13:48,627 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 37 transitions. Word has length 12 [2024-11-14 03:13:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:48,627 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 37 transitions. [2024-11-14 03:13:48,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 37 transitions. [2024-11-14 03:13:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:13:48,628 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:48,628 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:48,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:13:48,629 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:48,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:48,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1308513941, now seen corresponding path program 1 times [2024-11-14 03:13:48,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:48,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269042921] [2024-11-14 03:13:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:48,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:48,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:48,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269042921] [2024-11-14 03:13:48,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269042921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:48,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409819476] [2024-11-14 03:13:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:48,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:48,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:48,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:48,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:13:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:48,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 03:13:48,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:48,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409819476] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:49,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:13:49,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-14 03:13:49,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773534598] [2024-11-14 03:13:49,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:49,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:13:49,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:13:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:13:49,038 INFO L87 Difference]: Start difference. First operand 25 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:49,116 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2024-11-14 03:13:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:13:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 03:13:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:49,117 INFO L225 Difference]: With dead ends: 31 [2024-11-14 03:13:49,117 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 03:13:49,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:13:49,118 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:49,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 03:13:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 03:13:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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 03:13:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2024-11-14 03:13:49,127 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 12 [2024-11-14 03:13:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:49,127 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2024-11-14 03:13:49,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2024-11-14 03:13:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 03:13:49,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:49,128 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:49,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:13:49,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:49,333 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:49,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash -457667179, now seen corresponding path program 1 times [2024-11-14 03:13:49,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:49,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353414261] [2024-11-14 03:13:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:49,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:49,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353414261] [2024-11-14 03:13:49,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353414261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709962550] [2024-11-14 03:13:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:49,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:49,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:49,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:13:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:49,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:13:49,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:13:49,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:13:49,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709962550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:49,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549200192] [2024-11-14 03:13:49,768 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:49,768 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:49,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:49,777 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:49,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:50,170 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:50,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '667#(and (exists ((|v_ULTIMATE.start_main_~z~0#1_37| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_37| 4294967296) 0)) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_35| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_35| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_42| Int)) (not (= 0 (mod |v_ULTIMATE.start_main_~x~0#1_42| 4294967296)))))' at error location [2024-11-14 03:13:50,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:50,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:50,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-14 03:13:50,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551150409] [2024-11-14 03:13:50,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:50,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:13:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:50,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:13:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:13:50,396 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 03:13:50,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:50,655 INFO L93 Difference]: Finished difference Result 66 states and 106 transitions. [2024-11-14 03:13:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:13:50,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 13 [2024-11-14 03:13:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:50,658 INFO L225 Difference]: With dead ends: 66 [2024-11-14 03:13:50,658 INFO L226 Difference]: Without dead ends: 53 [2024-11-14 03:13:50,659 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:13:50,660 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:50,660 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 14 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:13:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-14 03:13:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2024-11-14 03:13:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:13:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 51 transitions. [2024-11-14 03:13:50,680 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 51 transitions. Word has length 13 [2024-11-14 03:13:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:50,681 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 51 transitions. [2024-11-14 03:13:50,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 03:13:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 51 transitions. [2024-11-14 03:13:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 03:13:50,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:50,682 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:50,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:13:50,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:50,883 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:50,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2069233201, now seen corresponding path program 1 times [2024-11-14 03:13:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:50,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280537660] [2024-11-14 03:13:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:50,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:13:51,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:51,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280537660] [2024-11-14 03:13:51,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280537660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:51,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465928823] [2024-11-14 03:13:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:51,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:51,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:51,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:51,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:13:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:51,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:13:51,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:51,169 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 03:13:51,169 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:13:51,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465928823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:51,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [25730530] [2024-11-14 03:13:51,275 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:51,275 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:51,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:51,276 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:51,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:51,547 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:51,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '945#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_58| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_58| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~y~0#1_51| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_51| 4294967296) 0)))' at error location [2024-11-14 03:13:51,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:51,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:51,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-11-14 03:13:51,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116750202] [2024-11-14 03:13:51,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:51,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 03:13:51,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 03:13:51,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:13:51,719 INFO L87 Difference]: Start difference. First operand 34 states and 51 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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 03:13:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:52,007 INFO L93 Difference]: Finished difference Result 130 states and 220 transitions. [2024-11-14 03:13:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:13:52,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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 13 [2024-11-14 03:13:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:52,009 INFO L225 Difference]: With dead ends: 130 [2024-11-14 03:13:52,009 INFO L226 Difference]: Without dead ends: 107 [2024-11-14 03:13:52,010 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-11-14 03:13:52,010 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:52,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 24 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:13:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-14 03:13:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2024-11-14 03:13:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.5394736842105263) internal successors, (117), 76 states have internal predecessors, (117), 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 03:13:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 117 transitions. [2024-11-14 03:13:52,051 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 117 transitions. Word has length 13 [2024-11-14 03:13:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:52,052 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 117 transitions. [2024-11-14 03:13:52,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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 03:13:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 117 transitions. [2024-11-14 03:13:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 03:13:52,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:52,054 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:52,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:13:52,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 03:13:52,255 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:52,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash -725515635, now seen corresponding path program 1 times [2024-11-14 03:13:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:52,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016288380] [2024-11-14 03:13:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:52,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:52,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:52,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016288380] [2024-11-14 03:13:52,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016288380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:52,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553261983] [2024-11-14 03:13:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:52,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:52,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:52,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:52,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:13:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:52,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 03:13:52,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:52,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:52,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553261983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:52,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128946652] [2024-11-14 03:13:52,601 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:52,603 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:52,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:52,604 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:52,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:52,803 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:52,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1450#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_75| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_75| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~y~0#1_69| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_69| 4294967296) 0)))' at error location [2024-11-14 03:13:52,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:52,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:52,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-14 03:13:52,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543873546] [2024-11-14 03:13:52,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:52,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:13:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:13:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:13:52,980 INFO L87 Difference]: Start difference. First operand 77 states and 117 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 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 03:13:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:53,521 INFO L93 Difference]: Finished difference Result 149 states and 226 transitions. [2024-11-14 03:13:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 03:13:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 03:13:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:53,523 INFO L225 Difference]: With dead ends: 149 [2024-11-14 03:13:53,524 INFO L226 Difference]: Without dead ends: 116 [2024-11-14 03:13:53,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2024-11-14 03:13:53,525 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:53,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 15 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:13:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-14 03:13:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2024-11-14 03:13:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 95 states have internal predecessors, (140), 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 03:13:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions. [2024-11-14 03:13:53,568 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 14 [2024-11-14 03:13:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:53,568 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 140 transitions. [2024-11-14 03:13:53,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 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 03:13:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2024-11-14 03:13:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 03:13:53,570 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:53,570 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:53,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:13:53,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 03:13:53,774 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:53,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:53,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2106572793, now seen corresponding path program 1 times [2024-11-14 03:13:53,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:53,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510158439] [2024-11-14 03:13:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:53,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:54,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:54,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510158439] [2024-11-14 03:13:54,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510158439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186026676] [2024-11-14 03:13:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:54,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:54,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:54,027 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:54,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:13:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:54,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:13:54,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:13:54,118 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:13:54,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186026676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:54,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479664991] [2024-11-14 03:13:54,157 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:54,158 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:54,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:54,158 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:54,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:54,328 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:54,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2044#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_67| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_67| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_81| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_81| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_94| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_94| 4294967296) 0))))' at error location [2024-11-14 03:13:54,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:54,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:54,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-14 03:13:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851578161] [2024-11-14 03:13:54,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:54,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:13:54,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:13:54,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:13:54,464 INFO L87 Difference]: Start difference. First operand 96 states and 140 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 03:13:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:54,579 INFO L93 Difference]: Finished difference Result 123 states and 180 transitions. [2024-11-14 03:13:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:13:54,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 15 [2024-11-14 03:13:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:54,581 INFO L225 Difference]: With dead ends: 123 [2024-11-14 03:13:54,581 INFO L226 Difference]: Without dead ends: 110 [2024-11-14 03:13:54,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:13:54,582 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:54,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-14 03:13:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2024-11-14 03:13:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.5217391304347827) internal successors, (140), 92 states have internal predecessors, (140), 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 03:13:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 140 transitions. [2024-11-14 03:13:54,612 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 140 transitions. Word has length 15 [2024-11-14 03:13:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:54,613 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 140 transitions. [2024-11-14 03:13:54,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 03:13:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 140 transitions. [2024-11-14 03:13:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:13:54,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:54,614 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:54,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:13:54,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:54,815 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:54,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:54,816 INFO L85 PathProgramCache]: Analyzing trace with hash -239777577, now seen corresponding path program 2 times [2024-11-14 03:13:54,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:54,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838729901] [2024-11-14 03:13:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:54,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:13:54,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:54,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838729901] [2024-11-14 03:13:54,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838729901] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:54,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304982750] [2024-11-14 03:13:54,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:13:54,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:54,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:54,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:54,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:13:54,989 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:13:54,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:13:54,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:13:54,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:13:55,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:13:55,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304982750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:55,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2093121901] [2024-11-14 03:13:55,144 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:55,144 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:55,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:55,145 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:55,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:55,350 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:55,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2572#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_110| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_110| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~y~0#1_99| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_99| 4294967296) 0)))' at error location [2024-11-14 03:13:55,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:55,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:55,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-14 03:13:55,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296078302] [2024-11-14 03:13:55,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:55,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:13:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:13:55,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:13:55,516 INFO L87 Difference]: Start difference. First operand 93 states and 140 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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 03:13:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:55,789 INFO L93 Difference]: Finished difference Result 132 states and 199 transitions. [2024-11-14 03:13:55,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:13:55,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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 03:13:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:55,791 INFO L225 Difference]: With dead ends: 132 [2024-11-14 03:13:55,791 INFO L226 Difference]: Without dead ends: 88 [2024-11-14 03:13:55,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:13:55,792 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:55,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 25 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:13:55,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-14 03:13:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2024-11-14 03:13:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.5063291139240507) internal successors, (119), 79 states have internal predecessors, (119), 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 03:13:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 119 transitions. [2024-11-14 03:13:55,822 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 119 transitions. Word has length 16 [2024-11-14 03:13:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:55,822 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 119 transitions. [2024-11-14 03:13:55,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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 03:13:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 119 transitions. [2024-11-14 03:13:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 03:13:55,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:55,823 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:55,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:13:56,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:13:56,028 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:56,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:56,030 INFO L85 PathProgramCache]: Analyzing trace with hash 304514781, now seen corresponding path program 3 times [2024-11-14 03:13:56,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:56,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438098162] [2024-11-14 03:13:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:56,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:56,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:56,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438098162] [2024-11-14 03:13:56,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438098162] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:56,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128506030] [2024-11-14 03:13:56,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:13:56,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:56,233 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:56,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:13:56,288 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:13:56,289 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:13:56,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 03:13:56,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:13:56,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:13:56,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128506030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:56,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017876115] [2024-11-14 03:13:56,555 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:56,555 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:56,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:56,556 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:56,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:56,713 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:56,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3103#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_116| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_116| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_132| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_132| 4294967296) 0))))' at error location [2024-11-14 03:13:56,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:56,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:56,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2024-11-14 03:13:56,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520751229] [2024-11-14 03:13:56,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:56,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:13:56,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:13:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:13:56,905 INFO L87 Difference]: Start difference. First operand 80 states and 119 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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 03:13:57,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:57,482 INFO L93 Difference]: Finished difference Result 131 states and 197 transitions. [2024-11-14 03:13:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 03:13:57,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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 17 [2024-11-14 03:13:57,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:57,483 INFO L225 Difference]: With dead ends: 131 [2024-11-14 03:13:57,484 INFO L226 Difference]: Without dead ends: 79 [2024-11-14 03:13:57,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:13:57,485 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:57,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 28 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:13:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-14 03:13:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2024-11-14 03:13:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.463768115942029) internal successors, (101), 69 states have internal predecessors, (101), 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 03:13:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2024-11-14 03:13:57,514 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 17 [2024-11-14 03:13:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:57,514 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2024-11-14 03:13:57,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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 03:13:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2024-11-14 03:13:57,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 03:13:57,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:57,516 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:57,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 03:13:57,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:13:57,717 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:57,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1088115779, now seen corresponding path program 2 times [2024-11-14 03:13:57,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:57,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674065138] [2024-11-14 03:13:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:57,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:13:57,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:57,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674065138] [2024-11-14 03:13:57,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674065138] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:57,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910810854] [2024-11-14 03:13:57,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:13:57,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:57,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:57,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:57,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:13:57,966 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:13:57,966 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:13:57,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:13:57,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:13:58,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:13:58,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910810854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:58,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488021403] [2024-11-14 03:13:58,117 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:58,118 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:58,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:58,118 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:58,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:58,220 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:58,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3637#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_144| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_144| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_110| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_110| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_125| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_125| 4294967296) 0)))' at error location [2024-11-14 03:13:58,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:58,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:58,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-11-14 03:13:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143716382] [2024-11-14 03:13:58,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:58,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:13:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:13:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:13:58,418 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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 03:13:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:59,024 INFO L93 Difference]: Finished difference Result 155 states and 239 transitions. [2024-11-14 03:13:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 03:13:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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 19 [2024-11-14 03:13:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:59,026 INFO L225 Difference]: With dead ends: 155 [2024-11-14 03:13:59,026 INFO L226 Difference]: Without dead ends: 122 [2024-11-14 03:13:59,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:13:59,029 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:59,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 37 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:13:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-14 03:13:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2024-11-14 03:13:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.3805309734513274) internal successors, (156), 113 states have internal predecessors, (156), 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 03:13:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 156 transitions. [2024-11-14 03:13:59,066 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 156 transitions. Word has length 19 [2024-11-14 03:13:59,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:59,066 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 156 transitions. [2024-11-14 03:13:59,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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 03:13:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 156 transitions. [2024-11-14 03:13:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:13:59,067 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:59,068 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:59,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:13:59,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:13:59,268 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:59,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash 809664663, now seen corresponding path program 4 times [2024-11-14 03:13:59,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:59,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065404788] [2024-11-14 03:13:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:59,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:13:59,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:59,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065404788] [2024-11-14 03:13:59,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065404788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60071370] [2024-11-14 03:13:59,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:13:59,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:59,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:59,531 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:59,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:13:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:59,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:13:59,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:13:59,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:13:59,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60071370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:59,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227819620] [2024-11-14 03:13:59,998 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:13:59,998 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:59,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:59,998 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:59,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:00,143 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:00,347 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4339#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_147| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_147| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_162| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_162| 4294967296) 0))))' at error location [2024-11-14 03:14:00,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:00,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:00,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 8] total 22 [2024-11-14 03:14:00,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473644162] [2024-11-14 03:14:00,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:00,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:14:00,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:00,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:14:00,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:14:00,349 INFO L87 Difference]: Start difference. First operand 114 states and 156 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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 03:14:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:02,190 INFO L93 Difference]: Finished difference Result 225 states and 334 transitions. [2024-11-14 03:14:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 03:14:02,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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 20 [2024-11-14 03:14:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:02,192 INFO L225 Difference]: With dead ends: 225 [2024-11-14 03:14:02,192 INFO L226 Difference]: Without dead ends: 175 [2024-11-14 03:14:02,196 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=2765, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 03:14:02,197 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:02,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 57 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:14:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-14 03:14:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2024-11-14 03:14:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.3969465648854962) internal successors, (183), 131 states have internal predecessors, (183), 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 03:14:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 183 transitions. [2024-11-14 03:14:02,250 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 183 transitions. Word has length 20 [2024-11-14 03:14:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:02,250 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 183 transitions. [2024-11-14 03:14:02,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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 03:14:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 183 transitions. [2024-11-14 03:14:02,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:14:02,251 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:02,251 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:02,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:14:02,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:14:02,452 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:02,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:02,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1953173995, now seen corresponding path program 3 times [2024-11-14 03:14:02,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:02,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543837677] [2024-11-14 03:14:02,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:02,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:14:02,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:02,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543837677] [2024-11-14 03:14:02,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543837677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:02,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827550646] [2024-11-14 03:14:02,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:14:02,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:02,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:02,754 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:02,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:14:02,819 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:14:02,819 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:02,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:14:02,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:14:02,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:14:03,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827550646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:03,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [412835386] [2024-11-14 03:14:03,038 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:03,038 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:03,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:03,038 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:03,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:03,151 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:03,401 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5239#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_161| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_161| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~z~0#1_147| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_147| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_177| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_177| 4294967296) 0))))' at error location [2024-11-14 03:14:03,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:03,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:03,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 19 [2024-11-14 03:14:03,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504593525] [2024-11-14 03:14:03,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:03,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:14:03,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:14:03,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2024-11-14 03:14:03,404 INFO L87 Difference]: Start difference. First operand 132 states and 183 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:04,167 INFO L93 Difference]: Finished difference Result 299 states and 453 transitions. [2024-11-14 03:14:04,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 03:14:04,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-14 03:14:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:04,169 INFO L225 Difference]: With dead ends: 299 [2024-11-14 03:14:04,170 INFO L226 Difference]: Without dead ends: 233 [2024-11-14 03:14:04,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:14:04,172 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:04,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 59 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:14:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-14 03:14:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 167. [2024-11-14 03:14:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.3975903614457832) internal successors, (232), 166 states have internal predecessors, (232), 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 03:14:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 232 transitions. [2024-11-14 03:14:04,234 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 232 transitions. Word has length 20 [2024-11-14 03:14:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:04,235 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 232 transitions. [2024-11-14 03:14:04,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 232 transitions. [2024-11-14 03:14:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 03:14:04,236 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:04,236 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:04,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:14:04,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:04,441 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:04,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash 654471877, now seen corresponding path program 4 times [2024-11-14 03:14:04,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:04,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101365914] [2024-11-14 03:14:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:04,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:04,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:04,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101365914] [2024-11-14 03:14:04,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101365914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:04,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204284139] [2024-11-14 03:14:04,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:14:04,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:04,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:04,763 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:04,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:14:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:04,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:14:04,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:14:04,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:14:05,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204284139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:05,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [772919680] [2024-11-14 03:14:05,202 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:05,202 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:05,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:05,202 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:05,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:05,321 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:05,587 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6332#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_176| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_176| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~z~0#1_167| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_167| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_204| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_204| 4294967296) 0))))' at error location [2024-11-14 03:14:05,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:05,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:05,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2024-11-14 03:14:05,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188002324] [2024-11-14 03:14:05,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:05,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 03:14:05,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 03:14:05,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2024-11-14 03:14:05,590 INFO L87 Difference]: Start difference. First operand 167 states and 232 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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 03:14:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:09,479 INFO L93 Difference]: Finished difference Result 434 states and 634 transitions. [2024-11-14 03:14:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-11-14 03:14:09,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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 22 [2024-11-14 03:14:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:09,481 INFO L225 Difference]: With dead ends: 434 [2024-11-14 03:14:09,482 INFO L226 Difference]: Without dead ends: 377 [2024-11-14 03:14:09,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4786 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1078, Invalid=12494, Unknown=0, NotChecked=0, Total=13572 [2024-11-14 03:14:09,489 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 134 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:09,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 38 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:14:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2024-11-14 03:14:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 188. [2024-11-14 03:14:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.3903743315508021) internal successors, (260), 187 states have internal predecessors, (260), 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 03:14:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 260 transitions. [2024-11-14 03:14:09,557 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 260 transitions. Word has length 22 [2024-11-14 03:14:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:09,557 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 260 transitions. [2024-11-14 03:14:09,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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 03:14:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 260 transitions. [2024-11-14 03:14:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:14:09,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:09,558 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:09,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:14:09,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:09,759 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:09,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1056894023, now seen corresponding path program 2 times [2024-11-14 03:14:09,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:09,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706944296] [2024-11-14 03:14:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:14:10,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:10,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706944296] [2024-11-14 03:14:10,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706944296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:10,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675658105] [2024-11-14 03:14:10,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:14:10,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:10,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:10,179 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:10,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:14:10,252 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:14:10,253 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:10,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:14:10,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:14:10,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:14:10,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675658105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:10,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228684908] [2024-11-14 03:14:10,400 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:10,400 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:10,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:10,401 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:10,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:10,487 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:10,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7906#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_187| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_187| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_192| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_192| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_230| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_230| 4294967296) 0))))' at error location [2024-11-14 03:14:10,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:10,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:10,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 16 [2024-11-14 03:14:10,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453881658] [2024-11-14 03:14:10,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:10,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:14:10,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:10,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:14:10,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:14:10,631 INFO L87 Difference]: Start difference. First operand 188 states and 260 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 03:14:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:19,517 INFO L93 Difference]: Finished difference Result 542 states and 776 transitions. [2024-11-14 03:14:19,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:14:19,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 23 [2024-11-14 03:14:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:19,521 INFO L225 Difference]: With dead ends: 542 [2024-11-14 03:14:19,521 INFO L226 Difference]: Without dead ends: 474 [2024-11-14 03:14:19,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2024-11-14 03:14:19,523 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:19,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 39 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:14:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2024-11-14 03:14:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 214. [2024-11-14 03:14:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.3661971830985915) internal successors, (291), 213 states have internal predecessors, (291), 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 03:14:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 291 transitions. [2024-11-14 03:14:19,656 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 291 transitions. Word has length 23 [2024-11-14 03:14:19,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:19,656 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 291 transitions. [2024-11-14 03:14:19,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 03:14:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 291 transitions. [2024-11-14 03:14:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:14:19,657 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:19,658 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:19,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:14:19,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:14:19,862 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:19,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1894351965, now seen corresponding path program 1 times [2024-11-14 03:14:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:19,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497148951] [2024-11-14 03:14:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:19,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:14:20,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:20,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497148951] [2024-11-14 03:14:20,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497148951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:20,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342691492] [2024-11-14 03:14:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:20,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:20,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:20,112 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:20,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:14:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:20,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:14:20,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:14:20,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:14:20,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342691492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:20,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995397364] [2024-11-14 03:14:20,471 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:20,472 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:20,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:20,472 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:20,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:20,593 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:20,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9580#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_212| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_212| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_248| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_248| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_206| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_206| 4294967296) 0)))' at error location [2024-11-14 03:14:20,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:20,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:20,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2024-11-14 03:14:20,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850994190] [2024-11-14 03:14:20,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:20,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:14:20,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:14:20,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-11-14 03:14:20,794 INFO L87 Difference]: Start difference. First operand 214 states and 291 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 03:14:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:22,272 INFO L93 Difference]: Finished difference Result 390 states and 575 transitions. [2024-11-14 03:14:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-14 03:14:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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) Word has length 23 [2024-11-14 03:14:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:22,276 INFO L225 Difference]: With dead ends: 390 [2024-11-14 03:14:22,276 INFO L226 Difference]: Without dead ends: 326 [2024-11-14 03:14:22,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 03:14:22,280 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:22,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 85 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:14:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-14 03:14:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 262. [2024-11-14 03:14:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.3333333333333333) internal successors, (348), 261 states have internal predecessors, (348), 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 03:14:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 348 transitions. [2024-11-14 03:14:22,464 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 348 transitions. Word has length 23 [2024-11-14 03:14:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:22,465 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 348 transitions. [2024-11-14 03:14:22,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 03:14:22,465 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 348 transitions. [2024-11-14 03:14:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:14:22,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:22,467 INFO L215 NwaCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:22,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 03:14:22,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:14:22,671 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:22,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:22,671 INFO L85 PathProgramCache]: Analyzing trace with hash 827336325, now seen corresponding path program 3 times [2024-11-14 03:14:22,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:22,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944459678] [2024-11-14 03:14:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:22,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:14:22,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:22,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944459678] [2024-11-14 03:14:22,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944459678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:22,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555091245] [2024-11-14 03:14:22,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:14:22,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:22,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:22,950 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:22,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:14:23,025 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:14:23,025 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:23,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 03:14:23,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:14:23,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 03:14:23,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555091245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:23,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931788325] [2024-11-14 03:14:23,360 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:23,361 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:23,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:23,362 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:23,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:23,513 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:23,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11076#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_235| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_235| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_267| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_267| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_222| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_222| 4294967296) 0)))' at error location [2024-11-14 03:14:23,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:23,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:23,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 7] total 21 [2024-11-14 03:14:23,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782424259] [2024-11-14 03:14:23,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:23,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:14:23,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:23,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:14:23,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2024-11-14 03:14:23,845 INFO L87 Difference]: Start difference. First operand 262 states and 348 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 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 03:14:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:25,210 INFO L93 Difference]: Finished difference Result 528 states and 770 transitions. [2024-11-14 03:14:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 03:14:25,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 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 23 [2024-11-14 03:14:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:25,213 INFO L225 Difference]: With dead ends: 528 [2024-11-14 03:14:25,213 INFO L226 Difference]: Without dead ends: 449 [2024-11-14 03:14:25,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:14:25,214 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 146 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:25,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 129 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:14:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-11-14 03:14:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 271. [2024-11-14 03:14:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.3407407407407408) internal successors, (362), 270 states have internal predecessors, (362), 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 03:14:25,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 362 transitions. [2024-11-14 03:14:25,340 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 362 transitions. Word has length 23 [2024-11-14 03:14:25,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:25,340 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 362 transitions. [2024-11-14 03:14:25,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 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 03:14:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 362 transitions. [2024-11-14 03:14:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 03:14:25,342 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:25,342 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:25,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 03:14:25,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:14:25,546 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:25,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1739257081, now seen corresponding path program 4 times [2024-11-14 03:14:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:25,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136399314] [2024-11-14 03:14:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:14:25,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:25,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136399314] [2024-11-14 03:14:25,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136399314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:25,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502905685] [2024-11-14 03:14:25,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:14:25,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:25,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:25,846 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:25,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:14:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:25,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:14:25,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:14:25,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:14:26,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502905685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:26,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956883355] [2024-11-14 03:14:26,073 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:26,073 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:26,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:26,074 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:26,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:26,226 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:26,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12863#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_294| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_294| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~y~0#1_249| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_249| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~z~0#1_235| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_235| 4294967296) 0)))' at error location [2024-11-14 03:14:26,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:26,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:26,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-11-14 03:14:26,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501460210] [2024-11-14 03:14:26,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:26,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:14:26,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:14:26,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:14:26,452 INFO L87 Difference]: Start difference. First operand 271 states and 362 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 03:14:26,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:26,964 INFO L93 Difference]: Finished difference Result 350 states and 475 transitions. [2024-11-14 03:14:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:14:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 27 [2024-11-14 03:14:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:26,968 INFO L225 Difference]: With dead ends: 350 [2024-11-14 03:14:26,968 INFO L226 Difference]: Without dead ends: 327 [2024-11-14 03:14:26,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 13 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:14:26,969 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:26,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:14:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-14 03:14:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 265. [2024-11-14 03:14:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.3636363636363635) internal successors, (360), 264 states have internal predecessors, (360), 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 03:14:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 360 transitions. [2024-11-14 03:14:27,098 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 360 transitions. Word has length 27 [2024-11-14 03:14:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:27,098 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 360 transitions. [2024-11-14 03:14:27,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 03:14:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 360 transitions. [2024-11-14 03:14:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:14:27,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:27,099 INFO L215 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:27,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-14 03:14:27,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:27,300 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:27,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash 662794475, now seen corresponding path program 5 times [2024-11-14 03:14:27,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:27,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572429917] [2024-11-14 03:14:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:27,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:14:27,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:27,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572429917] [2024-11-14 03:14:27,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572429917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:27,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500119195] [2024-11-14 03:14:27,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:14:27,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:27,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:27,606 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:27,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:14:27,686 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:14:27,686 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:27,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:14:27,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 03:14:27,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 03:14:28,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500119195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:28,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1552272811] [2024-11-14 03:14:28,228 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:28,228 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:28,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:28,228 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:28,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:28,323 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:28,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14274#(and (exists ((|v_ULTIMATE.start_main_~x~0#1_305| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_305| 4294967296) 0))) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_258| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_258| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_261| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_261| 4294967296) 0)))' at error location [2024-11-14 03:14:28,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:28,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:28,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2024-11-14 03:14:28,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843071638] [2024-11-14 03:14:28,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:28,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 03:14:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:28,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 03:14:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:14:28,618 INFO L87 Difference]: Start difference. First operand 265 states and 360 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 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 03:14:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:31,215 INFO L93 Difference]: Finished difference Result 768 states and 1149 transitions. [2024-11-14 03:14:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 03:14:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 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 28 [2024-11-14 03:14:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:31,223 INFO L225 Difference]: With dead ends: 768 [2024-11-14 03:14:31,224 INFO L226 Difference]: Without dead ends: 681 [2024-11-14 03:14:31,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=938, Invalid=3892, Unknown=0, NotChecked=0, Total=4830 [2024-11-14 03:14:31,226 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 159 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:31,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 55 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:14:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2024-11-14 03:14:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 412. [2024-11-14 03:14:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.3771289537712896) internal successors, (566), 411 states have internal predecessors, (566), 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 03:14:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 566 transitions. [2024-11-14 03:14:31,513 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 566 transitions. Word has length 28 [2024-11-14 03:14:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:31,513 INFO L471 AbstractCegarLoop]: Abstraction has 412 states and 566 transitions. [2024-11-14 03:14:31,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 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 03:14:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 566 transitions. [2024-11-14 03:14:31,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:14:31,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:31,515 INFO L215 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:31,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 03:14:31,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:31,720 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:31,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash 761266081, now seen corresponding path program 2 times [2024-11-14 03:14:31,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:31,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534727165] [2024-11-14 03:14:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:14:32,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:32,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534727165] [2024-11-14 03:14:32,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534727165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654124446] [2024-11-14 03:14:32,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:14:32,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:32,094 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:32,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 03:14:32,167 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:14:32,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:32,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:14:32,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 03:14:32,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 03:14:32,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654124446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:32,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [107079735] [2024-11-14 03:14:32,710 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:32,710 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:32,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:32,711 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:32,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:32,876 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:33,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16907#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_278| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_278| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_326| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_326| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~y~0#1_278| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_278| 4294967296) 0)))' at error location [2024-11-14 03:14:33,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:33,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:33,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 25 [2024-11-14 03:14:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729494877] [2024-11-14 03:14:33,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:33,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 03:14:33,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 03:14:33,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2024-11-14 03:14:33,194 INFO L87 Difference]: Start difference. First operand 412 states and 566 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 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 03:14:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:35,225 INFO L93 Difference]: Finished difference Result 798 states and 1158 transitions. [2024-11-14 03:14:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 03:14:35,226 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 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 28 [2024-11-14 03:14:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:35,229 INFO L225 Difference]: With dead ends: 798 [2024-11-14 03:14:35,229 INFO L226 Difference]: Without dead ends: 619 [2024-11-14 03:14:35,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=560, Invalid=2862, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 03:14:35,231 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:35,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 109 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:14:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2024-11-14 03:14:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 473. [2024-11-14 03:14:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.3792372881355932) internal successors, (651), 472 states have internal predecessors, (651), 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 03:14:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 651 transitions. [2024-11-14 03:14:35,569 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 651 transitions. Word has length 28 [2024-11-14 03:14:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:35,569 INFO L471 AbstractCegarLoop]: Abstraction has 473 states and 651 transitions. [2024-11-14 03:14:35,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 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 03:14:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 651 transitions. [2024-11-14 03:14:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 03:14:35,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:35,571 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:35,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-14 03:14:35,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:35,773 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:35,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:35,773 INFO L85 PathProgramCache]: Analyzing trace with hash -695586275, now seen corresponding path program 5 times [2024-11-14 03:14:35,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:35,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094520468] [2024-11-14 03:14:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:35,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 03:14:36,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:36,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094520468] [2024-11-14 03:14:36,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094520468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:36,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46024776] [2024-11-14 03:14:36,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:14:36,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:36,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:36,041 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:36,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 03:14:36,128 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:14:36,128 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:36,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 03:14:36,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:14:36,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:14:36,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46024776] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:36,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [456110206] [2024-11-14 03:14:36,431 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:36,431 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:36,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:36,431 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:36,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:36,524 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:36,728 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19696#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_301| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_301| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_299| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_299| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_361| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_361| 4294967296) 0))))' at error location [2024-11-14 03:14:36,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:36,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:36,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-14 03:14:36,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770554620] [2024-11-14 03:14:36,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:36,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:14:36,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:36,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:14:36,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:14:36,729 INFO L87 Difference]: Start difference. First operand 473 states and 651 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 03:14:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:38,110 INFO L93 Difference]: Finished difference Result 1173 states and 1633 transitions. [2024-11-14 03:14:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 03:14:38,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 31 [2024-11-14 03:14:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:38,116 INFO L225 Difference]: With dead ends: 1173 [2024-11-14 03:14:38,116 INFO L226 Difference]: Without dead ends: 1015 [2024-11-14 03:14:38,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2024-11-14 03:14:38,119 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:38,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 26 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:14:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2024-11-14 03:14:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 542. [2024-11-14 03:14:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 1.3955637707948243) internal successors, (755), 541 states have internal predecessors, (755), 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 03:14:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 755 transitions. [2024-11-14 03:14:38,434 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 755 transitions. Word has length 31 [2024-11-14 03:14:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:38,434 INFO L471 AbstractCegarLoop]: Abstraction has 542 states and 755 transitions. [2024-11-14 03:14:38,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 03:14:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 755 transitions. [2024-11-14 03:14:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 03:14:38,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:38,436 INFO L215 NwaCegarLoop]: trace histogram [8, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:38,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-14 03:14:38,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:38,636 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:38,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:38,637 INFO L85 PathProgramCache]: Analyzing trace with hash 208919367, now seen corresponding path program 6 times [2024-11-14 03:14:38,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:38,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581315957] [2024-11-14 03:14:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:38,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:14:38,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:38,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581315957] [2024-11-14 03:14:38,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581315957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749497459] [2024-11-14 03:14:38,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:14:38,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:38,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:38,986 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:38,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 03:14:39,063 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:14:39,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:39,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 03:14:39,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:14:39,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:14:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749497459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:39,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063908448] [2024-11-14 03:14:39,637 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:39,637 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:39,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:39,638 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:39,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:39,749 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:40,045 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23350#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_340| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_340| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_318| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_318| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_377| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_377| 4294967296) 0))))' at error location [2024-11-14 03:14:40,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:40,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:40,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 9] total 25 [2024-11-14 03:14:40,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029643494] [2024-11-14 03:14:40,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:40,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 03:14:40,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 03:14:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:14:40,046 INFO L87 Difference]: Start difference. First operand 542 states and 755 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 03:14:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:42,501 INFO L93 Difference]: Finished difference Result 924 states and 1274 transitions. [2024-11-14 03:14:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-14 03:14:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 31 [2024-11-14 03:14:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:42,505 INFO L225 Difference]: With dead ends: 924 [2024-11-14 03:14:42,505 INFO L226 Difference]: Without dead ends: 793 [2024-11-14 03:14:42,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1149, Invalid=5493, Unknown=0, NotChecked=0, Total=6642 [2024-11-14 03:14:42,507 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 191 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:42,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 42 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:14:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2024-11-14 03:14:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 591. [2024-11-14 03:14:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.3847457627118644) internal successors, (817), 590 states have internal predecessors, (817), 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 03:14:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 817 transitions. [2024-11-14 03:14:42,864 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 817 transitions. Word has length 31 [2024-11-14 03:14:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:42,864 INFO L471 AbstractCegarLoop]: Abstraction has 591 states and 817 transitions. [2024-11-14 03:14:42,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 03:14:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 817 transitions. [2024-11-14 03:14:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 03:14:42,865 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:42,866 INFO L215 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:42,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 03:14:43,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:43,066 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:43,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:43,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1105816927, now seen corresponding path program 3 times [2024-11-14 03:14:43,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:43,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917450394] [2024-11-14 03:14:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:43,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 03:14:43,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:43,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917450394] [2024-11-14 03:14:43,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917450394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:43,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436485874] [2024-11-14 03:14:43,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:14:43,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:43,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:43,367 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:43,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 03:14:43,428 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:14:43,428 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:43,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 03:14:43,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:14:43,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 03:14:43,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436485874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:43,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297095332] [2024-11-14 03:14:43,669 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:43,669 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:43,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:43,669 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:43,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:43,764 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:44,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26702#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_360| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_360| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_351| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_351| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_399| Int)) (not (= 0 (mod |v_ULTIMATE.start_main_~x~0#1_399| 4294967296)))))' at error location [2024-11-14 03:14:44,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:44,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:44,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 7] total 23 [2024-11-14 03:14:44,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956260802] [2024-11-14 03:14:44,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:44,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 03:14:44,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:44,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 03:14:44,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:14:44,046 INFO L87 Difference]: Start difference. First operand 591 states and 817 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 03:14:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:45,766 INFO L93 Difference]: Finished difference Result 1180 states and 1705 transitions. [2024-11-14 03:14:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 03:14:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 31 [2024-11-14 03:14:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:45,769 INFO L225 Difference]: With dead ends: 1180 [2024-11-14 03:14:45,769 INFO L226 Difference]: Without dead ends: 968 [2024-11-14 03:14:45,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=350, Invalid=1290, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:14:45,771 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:45,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 182 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:14:45,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2024-11-14 03:14:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 730. [2024-11-14 03:14:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.3635116598079562) internal successors, (994), 729 states have internal predecessors, (994), 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 03:14:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 994 transitions. [2024-11-14 03:14:46,472 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 994 transitions. Word has length 31 [2024-11-14 03:14:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:46,472 INFO L471 AbstractCegarLoop]: Abstraction has 730 states and 994 transitions. [2024-11-14 03:14:46,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 03:14:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 994 transitions. [2024-11-14 03:14:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:14:46,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:46,474 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:46,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 03:14:46,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-14 03:14:46,679 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:46,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:46,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1692168903, now seen corresponding path program 6 times [2024-11-14 03:14:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:46,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680088057] [2024-11-14 03:14:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:46,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:14:47,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:47,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680088057] [2024-11-14 03:14:47,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680088057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:47,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184076991] [2024-11-14 03:14:47,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:14:47,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:47,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:47,034 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:47,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 03:14:47,113 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:14:47,113 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:14:47,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 03:14:47,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:14:47,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:14:47,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184076991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:47,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156306215] [2024-11-14 03:14:47,308 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:47,308 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:47,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:47,308 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:47,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:47,424 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:47,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30747#(and (exists ((|v_ULTIMATE.start_main_~x~0#1_430| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_430| 4294967296) 0))) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_366| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_366| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~z~0#1_374| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_374| 4294967296) 0)))' at error location [2024-11-14 03:14:47,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:47,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:47,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-14 03:14:47,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417640438] [2024-11-14 03:14:47,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:47,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 03:14:47,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:47,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 03:14:47,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:14:47,669 INFO L87 Difference]: Start difference. First operand 730 states and 994 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:48,562 INFO L93 Difference]: Finished difference Result 938 states and 1243 transitions. [2024-11-14 03:14:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:14:48,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-14 03:14:48,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:48,567 INFO L225 Difference]: With dead ends: 938 [2024-11-14 03:14:48,567 INFO L226 Difference]: Without dead ends: 910 [2024-11-14 03:14:48,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 16 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:14:48,568 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:48,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:14:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2024-11-14 03:14:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 738. [2024-11-14 03:14:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 1.3690637720488468) internal successors, (1009), 737 states have internal predecessors, (1009), 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 03:14:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1009 transitions. [2024-11-14 03:14:48,948 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1009 transitions. Word has length 33 [2024-11-14 03:14:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:48,948 INFO L471 AbstractCegarLoop]: Abstraction has 738 states and 1009 transitions. [2024-11-14 03:14:48,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:14:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1009 transitions. [2024-11-14 03:14:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:14:48,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:48,950 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:48,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-14 03:14:49,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 03:14:49,154 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:49,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:49,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1330423009, now seen corresponding path program 7 times [2024-11-14 03:14:49,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:49,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092103983] [2024-11-14 03:14:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:49,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:14:49,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:49,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092103983] [2024-11-14 03:14:49,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092103983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:49,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471452707] [2024-11-14 03:14:49,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:14:49,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:49,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:49,494 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:49,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 03:14:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:49,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:14:49,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-14 03:14:50,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-14 03:14:50,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471452707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:50,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1364650397] [2024-11-14 03:14:50,489 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:14:50,489 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:50,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:50,489 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:50,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:50,562 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:50,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34320#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_380| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_380| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_458| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_458| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_402| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_402| 4294967296) 0)))' at error location [2024-11-14 03:14:50,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:50,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:50,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 36 [2024-11-14 03:14:50,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271122749] [2024-11-14 03:14:50,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:50,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 03:14:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 03:14:50,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:14:50,896 INFO L87 Difference]: Start difference. First operand 738 states and 1009 transitions. Second operand has 36 states, 36 states have (on average 1.5) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:01,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:01,793 INFO L93 Difference]: Finished difference Result 2730 states and 3858 transitions. [2024-11-14 03:15:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-11-14 03:15:01,794 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 36 states have internal predecessors, (54), 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 33 [2024-11-14 03:15:01,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:01,800 INFO L225 Difference]: With dead ends: 2730 [2024-11-14 03:15:01,800 INFO L226 Difference]: Without dead ends: 2422 [2024-11-14 03:15:01,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8807 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4868, Invalid=18388, Unknown=0, NotChecked=0, Total=23256 [2024-11-14 03:15:01,803 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 468 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 3447 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 4129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 3447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:01,803 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 88 Invalid, 4129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 3447 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-14 03:15:01,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2024-11-14 03:15:02,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 815. [2024-11-14 03:15:02,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 1.3513513513513513) internal successors, (1100), 814 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1100 transitions. [2024-11-14 03:15:02,370 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1100 transitions. Word has length 33 [2024-11-14 03:15:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:02,371 INFO L471 AbstractCegarLoop]: Abstraction has 815 states and 1100 transitions. [2024-11-14 03:15:02,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1100 transitions. [2024-11-14 03:15:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:15:02,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:02,373 INFO L215 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:02,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 03:15:02,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 03:15:02,573 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:02,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:02,574 INFO L85 PathProgramCache]: Analyzing trace with hash -981347641, now seen corresponding path program 7 times [2024-11-14 03:15:02,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:02,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477381626] [2024-11-14 03:15:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:02,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:15:02,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:02,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477381626] [2024-11-14 03:15:02,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477381626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:02,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075502467] [2024-11-14 03:15:02,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:15:02,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:02,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:02,866 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:02,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:15:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:02,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 03:15:02,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 03:15:03,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-14 03:15:03,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075502467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:03,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415406798] [2024-11-14 03:15:03,304 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:15:03,305 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:03,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:03,305 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:03,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:03,415 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:03,702 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41847#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_482| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_482| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_423| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_423| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_417| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_417| 4294967296) 0)))' at error location [2024-11-14 03:15:03,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:03,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:03,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 8] total 26 [2024-11-14 03:15:03,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956706877] [2024-11-14 03:15:03,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:03,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 03:15:03,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:03,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 03:15:03,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:15:03,704 INFO L87 Difference]: Start difference. First operand 815 states and 1100 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:06,185 INFO L93 Difference]: Finished difference Result 1707 states and 2405 transitions. [2024-11-14 03:15:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 03:15:06,186 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-14 03:15:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:06,191 INFO L225 Difference]: With dead ends: 1707 [2024-11-14 03:15:06,191 INFO L226 Difference]: Without dead ends: 1436 [2024-11-14 03:15:06,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 03:15:06,192 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 180 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:06,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 198 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:15:06,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2024-11-14 03:15:06,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1002. [2024-11-14 03:15:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.3336663336663337) internal successors, (1335), 1001 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1335 transitions. [2024-11-14 03:15:06,949 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1335 transitions. Word has length 33 [2024-11-14 03:15:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:06,950 INFO L471 AbstractCegarLoop]: Abstraction has 1002 states and 1335 transitions. [2024-11-14 03:15:06,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1335 transitions. [2024-11-14 03:15:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:15:06,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:06,952 INFO L215 NwaCegarLoop]: trace histogram [12, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:06,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 03:15:07,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 03:15:07,152 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:07,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1911049635, now seen corresponding path program 4 times [2024-11-14 03:15:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:07,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832172072] [2024-11-14 03:15:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 03:15:07,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:07,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832172072] [2024-11-14 03:15:07,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832172072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:07,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670544727] [2024-11-14 03:15:07,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:15:07,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:07,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:07,521 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:07,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 03:15:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:07,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 03:15:07,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:15:07,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-14 03:15:07,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670544727] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:07,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927352923] [2024-11-14 03:15:07,999 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:15:07,999 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:07,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:07,999 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:07,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:08,088 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:08,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47527#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_449| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_449| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_506| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_506| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_447| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_447| 4294967296) 0)))' at error location [2024-11-14 03:15:08,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:08,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:08,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 10] total 32 [2024-11-14 03:15:08,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409857117] [2024-11-14 03:15:08,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:08,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 03:15:08,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 03:15:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:15:08,309 INFO L87 Difference]: Start difference. First operand 1002 states and 1335 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:10,735 INFO L93 Difference]: Finished difference Result 1920 states and 2713 transitions. [2024-11-14 03:15:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 03:15:10,735 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 03:15:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:10,740 INFO L225 Difference]: With dead ends: 1920 [2024-11-14 03:15:10,740 INFO L226 Difference]: Without dead ends: 1613 [2024-11-14 03:15:10,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=572, Invalid=2184, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 03:15:10,741 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 217 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:10,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 214 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:15:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2024-11-14 03:15:11,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1142. [2024-11-14 03:15:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 1.326906222611744) internal successors, (1514), 1141 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1514 transitions. [2024-11-14 03:15:11,389 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1514 transitions. Word has length 35 [2024-11-14 03:15:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:11,389 INFO L471 AbstractCegarLoop]: Abstraction has 1142 states and 1514 transitions. [2024-11-14 03:15:11,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1514 transitions. [2024-11-14 03:15:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 03:15:11,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:11,390 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:11,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-14 03:15:11,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 03:15:11,595 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:11,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:11,595 INFO L85 PathProgramCache]: Analyzing trace with hash 36134871, now seen corresponding path program 8 times [2024-11-14 03:15:11,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:11,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662476784] [2024-11-14 03:15:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:11,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 03:15:11,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:11,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662476784] [2024-11-14 03:15:11,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662476784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:11,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954938799] [2024-11-14 03:15:11,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:11,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:11,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:11,878 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:11,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 03:15:12,076 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 03:15:12,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:12,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 03:15:12,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 03:15:12,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-14 03:15:12,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954938799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:12,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934491331] [2024-11-14 03:15:12,418 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:15:12,419 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:12,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:12,419 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:12,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:12,524 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:12,788 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53918#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_531| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_531| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_474| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_474| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_481| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_481| 4294967296) 0)))' at error location [2024-11-14 03:15:12,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:12,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:12,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 27 [2024-11-14 03:15:12,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144534106] [2024-11-14 03:15:12,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:12,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 03:15:12,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 03:15:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:15:12,789 INFO L87 Difference]: Start difference. First operand 1142 states and 1514 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:15,739 INFO L93 Difference]: Finished difference Result 1490 states and 1907 transitions. [2024-11-14 03:15:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-14 03:15:15,740 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 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 36 [2024-11-14 03:15:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:15,743 INFO L225 Difference]: With dead ends: 1490 [2024-11-14 03:15:15,743 INFO L226 Difference]: Without dead ends: 1298 [2024-11-14 03:15:15,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=450, Invalid=3710, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 03:15:15,744 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:15,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 112 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:15:15,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2024-11-14 03:15:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1056. [2024-11-14 03:15:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 1.3270142180094786) internal successors, (1400), 1055 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1400 transitions. [2024-11-14 03:15:16,491 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1400 transitions. Word has length 36 [2024-11-14 03:15:16,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:16,492 INFO L471 AbstractCegarLoop]: Abstraction has 1056 states and 1400 transitions. [2024-11-14 03:15:16,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1400 transitions. [2024-11-14 03:15:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:15:16,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:16,494 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:16,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 03:15:16,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 03:15:16,694 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:16,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:16,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1508862249, now seen corresponding path program 9 times [2024-11-14 03:15:16,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:16,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960349635] [2024-11-14 03:15:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:16,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-14 03:15:17,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:17,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960349635] [2024-11-14 03:15:17,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960349635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:17,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056332649] [2024-11-14 03:15:17,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:15:17,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:17,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:17,172 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:17,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 03:15:17,258 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:15:17,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:17,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 03:15:17,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:15:17,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:15:18,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056332649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:18,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [6125052] [2024-11-14 03:15:18,688 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:15:18,689 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:18,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:18,689 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:18,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:18,781 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:19,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59323#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_584| Int)) (not (= 0 (mod |v_ULTIMATE.start_main_~x~0#1_584| 4294967296)))) (exists ((|v_ULTIMATE.start_main_~y~0#1_510| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_510| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~z~0#1_504| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_504| 4294967296) 0)))' at error location [2024-11-14 03:15:19,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:19,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:19,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 30 [2024-11-14 03:15:19,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274546614] [2024-11-14 03:15:19,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:19,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 03:15:19,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:19,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 03:15:19,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1051, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:15:19,130 INFO L87 Difference]: Start difference. First operand 1056 states and 1400 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:37,911 INFO L93 Difference]: Finished difference Result 2235 states and 2913 transitions. [2024-11-14 03:15:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2024-11-14 03:15:37,911 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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 38 [2024-11-14 03:15:37,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:37,916 INFO L225 Difference]: With dead ends: 2235 [2024-11-14 03:15:37,917 INFO L226 Difference]: Without dead ends: 2067 [2024-11-14 03:15:37,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 79 SyntacticMatches, 20 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15203 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3306, Invalid=37700, Unknown=0, NotChecked=0, Total=41006 [2024-11-14 03:15:37,921 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 334 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3679 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 4360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 3679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:37,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 65 Invalid, 4360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 3679 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-14 03:15:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2024-11-14 03:15:38,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1073. [2024-11-14 03:15:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 1.3031716417910448) internal successors, (1397), 1072 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1397 transitions. [2024-11-14 03:15:38,681 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1397 transitions. Word has length 38 [2024-11-14 03:15:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:38,681 INFO L471 AbstractCegarLoop]: Abstraction has 1073 states and 1397 transitions. [2024-11-14 03:15:38,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1397 transitions. [2024-11-14 03:15:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:15:38,683 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:38,683 INFO L215 NwaCegarLoop]: trace histogram [13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:38,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 03:15:38,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:38,883 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:38,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:38,884 INFO L85 PathProgramCache]: Analyzing trace with hash 335525775, now seen corresponding path program 5 times [2024-11-14 03:15:38,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:38,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66663096] [2024-11-14 03:15:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:38,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 03:15:39,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66663096] [2024-11-14 03:15:39,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66663096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945150946] [2024-11-14 03:15:39,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:39,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:39,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:39,293 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:39,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 03:15:39,367 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:15:39,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:39,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:15:39,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-11-14 03:15:39,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-11-14 03:15:39,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945150946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:39,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687316322] [2024-11-14 03:15:39,951 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:15:39,951 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:39,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:39,951 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:39,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:40,021 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:40,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66520#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_537| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_537| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_609| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_609| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_527| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_527| 4294967296) 0)))' at error location [2024-11-14 03:15:40,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:40,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:40,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 28 [2024-11-14 03:15:40,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457101437] [2024-11-14 03:15:40,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:40,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 03:15:40,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:40,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 03:15:40,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:15:40,226 INFO L87 Difference]: Start difference. First operand 1073 states and 1397 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:43,561 INFO L93 Difference]: Finished difference Result 2043 states and 2840 transitions. [2024-11-14 03:15:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 03:15:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-14 03:15:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:43,566 INFO L225 Difference]: With dead ends: 2043 [2024-11-14 03:15:43,566 INFO L226 Difference]: Without dead ends: 1817 [2024-11-14 03:15:43,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=759, Invalid=3147, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 03:15:43,568 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 342 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:43,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 210 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:15:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2024-11-14 03:15:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1219. [2024-11-14 03:15:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 1.299671592775041) internal successors, (1583), 1218 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1583 transitions. [2024-11-14 03:15:44,380 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1583 transitions. Word has length 38 [2024-11-14 03:15:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:44,381 INFO L471 AbstractCegarLoop]: Abstraction has 1219 states and 1583 transitions. [2024-11-14 03:15:44,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1583 transitions. [2024-11-14 03:15:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:15:44,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:44,382 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:44,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-14 03:15:44,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:44,583 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:44,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:44,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1390188039, now seen corresponding path program 10 times [2024-11-14 03:15:44,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:44,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033905395] [2024-11-14 03:15:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:44,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 03:15:44,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:44,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033905395] [2024-11-14 03:15:44,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033905395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:44,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821961910] [2024-11-14 03:15:44,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:15:44,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:44,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:44,971 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:44,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 03:15:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:45,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 03:15:45,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 03:15:45,087 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 03:15:45,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821961910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:45,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533568392] [2024-11-14 03:15:45,189 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:15:45,189 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:45,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:45,189 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:45,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:45,255 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:45,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73341#(and (exists ((|v_ULTIMATE.start_main_~x~0#1_644| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_644| 4294967296) 0))) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_553| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_553| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~z~0#1_542| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_542| 4294967296) 0)))' at error location [2024-11-14 03:15:45,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:45,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:45,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2024-11-14 03:15:45,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906171896] [2024-11-14 03:15:45,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:45,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 03:15:45,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:45,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 03:15:45,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-11-14 03:15:45,431 INFO L87 Difference]: Start difference. First operand 1219 states and 1583 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:47,088 INFO L93 Difference]: Finished difference Result 1477 states and 1927 transitions. [2024-11-14 03:15:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:15:47,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 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 39 [2024-11-14 03:15:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:47,093 INFO L225 Difference]: With dead ends: 1477 [2024-11-14 03:15:47,094 INFO L226 Difference]: Without dead ends: 1444 [2024-11-14 03:15:47,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 19 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-11-14 03:15:47,095 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:47,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 36 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:15:47,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2024-11-14 03:15:48,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1215. [2024-11-14 03:15:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 1.3113673805601318) internal successors, (1592), 1214 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1592 transitions. [2024-11-14 03:15:48,065 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1592 transitions. Word has length 39 [2024-11-14 03:15:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:48,066 INFO L471 AbstractCegarLoop]: Abstraction has 1215 states and 1592 transitions. [2024-11-14 03:15:48,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1592 transitions. [2024-11-14 03:15:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 03:15:48,067 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:48,067 INFO L215 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:48,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 03:15:48,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:48,268 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:48,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:48,268 INFO L85 PathProgramCache]: Analyzing trace with hash 12638505, now seen corresponding path program 11 times [2024-11-14 03:15:48,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:48,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824716157] [2024-11-14 03:15:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:48,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:15:48,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:48,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824716157] [2024-11-14 03:15:48,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824716157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:48,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365029628] [2024-11-14 03:15:48,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:48,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:48,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:48,665 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:48,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 03:15:48,724 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:15:48,724 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:48,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:15:48,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-14 03:15:48,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-14 03:15:49,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365029628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:49,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [739757244] [2024-11-14 03:15:49,115 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:15:49,116 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:49,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:49,116 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:49,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:49,192 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:49,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '78979#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_559| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_559| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_667| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_667| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~y~0#1_582| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_582| 4294967296) 0)))' at error location [2024-11-14 03:15:49,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:49,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:49,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 27 [2024-11-14 03:15:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760660624] [2024-11-14 03:15:49,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:49,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 03:15:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:49,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 03:15:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:15:49,510 INFO L87 Difference]: Start difference. First operand 1215 states and 1592 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:53,160 INFO L93 Difference]: Finished difference Result 2355 states and 3328 transitions. [2024-11-14 03:15:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 03:15:53,161 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-14 03:15:53,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:53,167 INFO L225 Difference]: With dead ends: 2355 [2024-11-14 03:15:53,167 INFO L226 Difference]: Without dead ends: 2060 [2024-11-14 03:15:53,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=662, Invalid=2418, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 03:15:53,168 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 303 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:53,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 314 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:15:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2024-11-14 03:15:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1254. [2024-11-14 03:15:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.3192338387869114) internal successors, (1653), 1253 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1653 transitions. [2024-11-14 03:15:54,051 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1653 transitions. Word has length 40 [2024-11-14 03:15:54,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:54,051 INFO L471 AbstractCegarLoop]: Abstraction has 1254 states and 1653 transitions. [2024-11-14 03:15:54,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:15:54,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1653 transitions. [2024-11-14 03:15:54,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 03:15:54,052 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:54,052 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:54,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 03:15:54,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-14 03:15:54,253 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:54,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash 507320055, now seen corresponding path program 12 times [2024-11-14 03:15:54,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:54,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275746252] [2024-11-14 03:15:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:54,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 03:15:54,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:54,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275746252] [2024-11-14 03:15:54,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275746252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:54,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185532754] [2024-11-14 03:15:54,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:15:54,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:54,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:54,644 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:54,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 03:15:54,703 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:15:54,704 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:54,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 03:15:54,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 9 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:15:55,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 9 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:15:55,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185532754] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:55,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214541692] [2024-11-14 03:15:55,923 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:15:55,923 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:55,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:55,924 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:55,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:15:56,029 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:56,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '86522#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_613| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_613| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_724| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_724| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_591| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_591| 4294967296) 0)))' at error location [2024-11-14 03:15:56,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:56,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:56,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 13] total 33 [2024-11-14 03:15:56,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152234735] [2024-11-14 03:15:56,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:56,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 03:15:56,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 03:15:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1255, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 03:15:56,427 INFO L87 Difference]: Start difference. First operand 1254 states and 1653 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 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 03:16:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:35,421 INFO L93 Difference]: Finished difference Result 3107 states and 4026 transitions. [2024-11-14 03:16:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2024-11-14 03:16:35,421 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 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 41 [2024-11-14 03:16:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:35,429 INFO L225 Difference]: With dead ends: 3107 [2024-11-14 03:16:35,429 INFO L226 Difference]: Without dead ends: 2828 [2024-11-14 03:16:35,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 85 SyntacticMatches, 22 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 48264 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=7291, Invalid=108649, Unknown=0, NotChecked=0, Total=115940 [2024-11-14 03:16:35,432 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 453 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 6213 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 7197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 6213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:35,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 72 Invalid, 7197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [984 Valid, 6213 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2024-11-14 03:16:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2024-11-14 03:16:37,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 1500. [2024-11-14 03:16:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 1.274849899933289) internal successors, (1911), 1499 states have internal predecessors, (1911), 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 03:16:37,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1911 transitions. [2024-11-14 03:16:37,031 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1911 transitions. Word has length 41 [2024-11-14 03:16:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:37,032 INFO L471 AbstractCegarLoop]: Abstraction has 1500 states and 1911 transitions. [2024-11-14 03:16:37,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 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 03:16:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1911 transitions. [2024-11-14 03:16:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:16:37,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:37,035 INFO L215 NwaCegarLoop]: trace histogram [15, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:37,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 03:16:37,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-14 03:16:37,236 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:37,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:37,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1634629217, now seen corresponding path program 6 times [2024-11-14 03:16:37,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:37,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751181967] [2024-11-14 03:16:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:37,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-14 03:16:37,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:37,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751181967] [2024-11-14 03:16:37,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751181967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:37,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444365140] [2024-11-14 03:16:37,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:16:37,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:37,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:37,908 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:37,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 03:16:37,996 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:16:37,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:37,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-14 03:16:38,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:16:38,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-14 03:16:38,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444365140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:38,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132060609] [2024-11-14 03:16:38,657 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:16:38,657 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:38,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:38,657 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:38,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:38,771 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:39,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '96622#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_751| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_751| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_619| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_619| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_651| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_651| 4294967296) 0)))' at error location [2024-11-14 03:16:39,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:39,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:39,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 12] total 39 [2024-11-14 03:16:39,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542179980] [2024-11-14 03:16:39,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:39,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 03:16:39,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:39,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 03:16:39,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1492, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:16:39,099 INFO L87 Difference]: Start difference. First operand 1500 states and 1911 transitions. Second operand has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 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 03:16:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:44,444 INFO L93 Difference]: Finished difference Result 2676 states and 3690 transitions. [2024-11-14 03:16:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-14 03:16:44,445 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 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 42 [2024-11-14 03:16:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:44,453 INFO L225 Difference]: With dead ends: 2676 [2024-11-14 03:16:44,454 INFO L226 Difference]: Without dead ends: 2352 [2024-11-14 03:16:44,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=998, Invalid=3694, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 03:16:44,455 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 395 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:44,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 308 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 03:16:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2024-11-14 03:16:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1566. [2024-11-14 03:16:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 1.2926517571884983) internal successors, (2023), 1565 states have internal predecessors, (2023), 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 03:16:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2023 transitions. [2024-11-14 03:16:46,030 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2023 transitions. Word has length 42 [2024-11-14 03:16:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:46,031 INFO L471 AbstractCegarLoop]: Abstraction has 1566 states and 2023 transitions. [2024-11-14 03:16:46,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 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 03:16:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2023 transitions. [2024-11-14 03:16:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 03:16:46,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:46,033 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:46,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 03:16:46,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-14 03:16:46,234 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:46,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:46,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1026699975, now seen corresponding path program 13 times [2024-11-14 03:16:46,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:46,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113725600] [2024-11-14 03:16:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:46,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-14 03:16:46,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:46,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113725600] [2024-11-14 03:16:46,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113725600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:46,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970524196] [2024-11-14 03:16:46,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:16:46,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:46,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:46,615 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:46,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 03:16:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:46,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 03:16:46,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-14 03:16:46,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-11-14 03:16:47,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970524196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:47,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933014709] [2024-11-14 03:16:47,285 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:16:47,285 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:47,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:47,285 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:47,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:47,374 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:47,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '105440#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_779| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_779| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~y~0#1_689| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_689| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~z~0#1_650| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_650| 4294967296) 0)))' at error location [2024-11-14 03:16:47,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:47,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:47,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 12] total 33 [2024-11-14 03:16:47,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353093311] [2024-11-14 03:16:47,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:47,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 03:16:47,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 03:16:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 03:16:47,757 INFO L87 Difference]: Start difference. First operand 1566 states and 2023 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 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 03:16:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:53,705 INFO L93 Difference]: Finished difference Result 1899 states and 2462 transitions. [2024-11-14 03:16:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-14 03:16:53,706 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 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 43 [2024-11-14 03:16:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:53,712 INFO L225 Difference]: With dead ends: 1899 [2024-11-14 03:16:53,712 INFO L226 Difference]: Without dead ends: 1557 [2024-11-14 03:16:53,713 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=739, Invalid=7271, Unknown=0, NotChecked=0, Total=8010 [2024-11-14 03:16:53,714 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:53,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 188 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 03:16:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2024-11-14 03:16:55,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1362. [2024-11-14 03:16:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 1.3130051432770022) internal successors, (1787), 1361 states have internal predecessors, (1787), 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 03:16:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1787 transitions. [2024-11-14 03:16:55,097 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1787 transitions. Word has length 43 [2024-11-14 03:16:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:55,097 INFO L471 AbstractCegarLoop]: Abstraction has 1362 states and 1787 transitions. [2024-11-14 03:16:55,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 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 03:16:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1787 transitions. [2024-11-14 03:16:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:16:55,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:55,099 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:55,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-14 03:16:55,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 03:16:55,300 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:55,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash 10720343, now seen corresponding path program 14 times [2024-11-14 03:16:55,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:55,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131878732] [2024-11-14 03:16:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 03:16:55,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131878732] [2024-11-14 03:16:55,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131878732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:55,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649353894] [2024-11-14 03:16:55,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:16:55,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:55,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:55,781 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:55,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 03:16:55,942 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:16:55,942 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:16:55,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:16:55,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-11-14 03:16:56,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:16:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-11-14 03:16:57,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649353894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:16:57,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556578436] [2024-11-14 03:16:57,070 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:16:57,070 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:16:57,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:16:57,070 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:16:57,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:57,174 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:57,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '112365#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_712| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_712| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_797| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_797| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_685| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_685| 4294967296) 0)))' at error location [2024-11-14 03:16:57,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:57,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:57,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 46 [2024-11-14 03:16:57,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937749869] [2024-11-14 03:16:57,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:57,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 03:16:57,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:57,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 03:16:57,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 03:16:57,591 INFO L87 Difference]: Start difference. First operand 1362 states and 1787 transitions. Second operand has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 46 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:14,743 INFO L93 Difference]: Finished difference Result 2989 states and 4268 transitions. [2024-11-14 03:17:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2024-11-14 03:17:14,743 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 46 states have internal predecessors, (72), 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 44 [2024-11-14 03:17:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:14,752 INFO L225 Difference]: With dead ends: 2989 [2024-11-14 03:17:14,752 INFO L226 Difference]: Without dead ends: 2800 [2024-11-14 03:17:14,754 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12654 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=6425, Invalid=30631, Unknown=0, NotChecked=0, Total=37056 [2024-11-14 03:17:14,755 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 651 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6467 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 7023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 6467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:14,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 78 Invalid, 7023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 6467 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-14 03:17:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2024-11-14 03:17:16,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1379. [2024-11-14 03:17:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 1.3461538461538463) internal successors, (1855), 1378 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1855 transitions. [2024-11-14 03:17:16,471 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1855 transitions. Word has length 44 [2024-11-14 03:17:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:16,471 INFO L471 AbstractCegarLoop]: Abstraction has 1379 states and 1855 transitions. [2024-11-14 03:17:16,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 46 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1855 transitions. [2024-11-14 03:17:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:17:16,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:16,473 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:16,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 03:17:16,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 03:17:16,673 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:17:16,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:16,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1277455161, now seen corresponding path program 15 times [2024-11-14 03:17:16,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:16,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963703757] [2024-11-14 03:17:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:16,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 03:17:17,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:17,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963703757] [2024-11-14 03:17:17,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963703757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:17,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255408700] [2024-11-14 03:17:17,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:17:17,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:17,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:17,168 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:17,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 03:17:17,270 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:17:17,270 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:17:17,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 03:17:17,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-14 03:17:17,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-14 03:17:17,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255408700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:17,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965424422] [2024-11-14 03:17:17,536 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:17:17,536 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:17,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:17,536 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:17,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:17,632 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:17,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '121707#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_729| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_729| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_836| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_836| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_701| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_701| 4294967296) 0)))' at error location [2024-11-14 03:17:17,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:17,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:17,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-11-14 03:17:17,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45500991] [2024-11-14 03:17:17,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:17,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:17:17,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:17,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:17:17,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:17:17,897 INFO L87 Difference]: Start difference. First operand 1379 states and 1855 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:21,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:21,715 INFO L93 Difference]: Finished difference Result 1998 states and 2577 transitions. [2024-11-14 03:17:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:17:21,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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 45 [2024-11-14 03:17:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:21,719 INFO L225 Difference]: With dead ends: 1998 [2024-11-14 03:17:21,720 INFO L226 Difference]: Without dead ends: 1960 [2024-11-14 03:17:21,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 22 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:17:21,720 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:21,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:17:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2024-11-14 03:17:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1394. [2024-11-14 03:17:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 1.3575017946877244) internal successors, (1891), 1393 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1891 transitions. [2024-11-14 03:17:23,324 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1891 transitions. Word has length 45 [2024-11-14 03:17:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:23,324 INFO L471 AbstractCegarLoop]: Abstraction has 1394 states and 1891 transitions. [2024-11-14 03:17:23,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1891 transitions. [2024-11-14 03:17:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:17:23,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:23,326 INFO L215 NwaCegarLoop]: trace histogram [16, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:23,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:23,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:23,526 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:17:23,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash 779986913, now seen corresponding path program 7 times [2024-11-14 03:17:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:23,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209137669] [2024-11-14 03:17:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:23,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 03:17:24,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:24,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209137669] [2024-11-14 03:17:24,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209137669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:24,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573528065] [2024-11-14 03:17:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:17:24,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:24,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:24,151 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:24,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 03:17:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:24,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-14 03:17:24,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 03:17:24,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2024-11-14 03:17:24,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573528065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:24,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628766926] [2024-11-14 03:17:24,584 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:17:24,584 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:24,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:24,585 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:24,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:24,670 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:24,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '128779#(and (exists ((|v_ULTIMATE.start_main_~x~0#1_859| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_859| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_721| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_721| 4294967296) 0)) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_776| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_776| 4294967296) 0)))' at error location [2024-11-14 03:17:24,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:24,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:24,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 8] total 31 [2024-11-14 03:17:24,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671647052] [2024-11-14 03:17:24,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:24,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 03:17:24,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 03:17:24,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:17:24,925 INFO L87 Difference]: Start difference. First operand 1394 states and 1891 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:17:30,878 INFO L93 Difference]: Finished difference Result 2956 states and 4129 transitions. [2024-11-14 03:17:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-14 03:17:30,878 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 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 45 [2024-11-14 03:17:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:17:30,884 INFO L225 Difference]: With dead ends: 2956 [2024-11-14 03:17:30,885 INFO L226 Difference]: Without dead ends: 2513 [2024-11-14 03:17:30,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=834, Invalid=3326, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 03:17:30,886 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 362 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 3165 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 3293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 3165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:17:30,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 400 Invalid, 3293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 3165 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 03:17:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2024-11-14 03:17:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1635. [2024-11-14 03:17:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 1.332313341493268) internal successors, (2177), 1634 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 2177 transitions. [2024-11-14 03:17:32,872 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 2177 transitions. Word has length 45 [2024-11-14 03:17:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:17:32,872 INFO L471 AbstractCegarLoop]: Abstraction has 1635 states and 2177 transitions. [2024-11-14 03:17:32,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:17:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 2177 transitions. [2024-11-14 03:17:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:17:32,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:17:32,873 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:17:32,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-14 03:17:33,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:33,074 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:17:33,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:17:33,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1663580743, now seen corresponding path program 16 times [2024-11-14 03:17:33,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:17:33,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297014867] [2024-11-14 03:17:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:17:33,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:17:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:17:33,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:17:33,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297014867] [2024-11-14 03:17:33,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297014867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:17:33,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061421985] [2024-11-14 03:17:33,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:17:33,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:17:33,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:17:33,803 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:17:33,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 03:17:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:17:33,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-14 03:17:33,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:17:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 20 proven. 112 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-14 03:17:34,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:17:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 20 proven. 112 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-14 03:17:35,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061421985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:17:35,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136838388] [2024-11-14 03:17:35,304 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:17:35,304 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:17:35,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:17:35,304 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:17:35,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:17:35,365 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:17:35,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '138334#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_810| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_810| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~z~0#1_757| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_757| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_921| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_921| 4294967296) 0))))' at error location [2024-11-14 03:17:35,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:17:35,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:17:35,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 39 [2024-11-14 03:17:35,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367364510] [2024-11-14 03:17:35,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:17:35,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 03:17:35,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:17:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 03:17:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:17:35,704 INFO L87 Difference]: Start difference. First operand 1635 states and 2177 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 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 03:19:32,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:32,499 INFO L93 Difference]: Finished difference Result 4564 states and 5808 transitions. [2024-11-14 03:19:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 786 states. [2024-11-14 03:19:32,500 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 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 47 [2024-11-14 03:19:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:32,516 INFO L225 Difference]: With dead ends: 4564 [2024-11-14 03:19:32,517 INFO L226 Difference]: Without dead ends: 4210 [2024-11-14 03:19:32,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 118 SyntacticMatches, 24 SemanticMatches, 812 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 305944 ImplicationChecksByTransitivity, 84.2s TimeCoverageRelationStatistics Valid=24997, Invalid=636785, Unknown=0, NotChecked=0, Total=661782 [2024-11-14 03:19:32,547 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 831 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 13375 mSolverCounterSat, 1933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 15308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1933 IncrementalHoareTripleChecker+Valid, 13375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:32,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 84 Invalid, 15308 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1933 Valid, 13375 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2024-11-14 03:19:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2024-11-14 03:19:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 1684. [2024-11-14 03:19:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.3273915626856803) internal successors, (2234), 1683 states have internal predecessors, (2234), 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 03:19:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2234 transitions. [2024-11-14 03:19:35,820 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2234 transitions. Word has length 47 [2024-11-14 03:19:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:35,821 INFO L471 AbstractCegarLoop]: Abstraction has 1684 states and 2234 transitions. [2024-11-14 03:19:35,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 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 03:19:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2234 transitions. [2024-11-14 03:19:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:19:35,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:35,824 INFO L215 NwaCegarLoop]: trace histogram [17, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:35,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-14 03:19:36,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 03:19:36,027 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:19:36,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash -587332729, now seen corresponding path program 17 times [2024-11-14 03:19:36,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:36,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553377002] [2024-11-14 03:19:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:36,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 03:19:36,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:36,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553377002] [2024-11-14 03:19:36,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553377002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:36,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76568676] [2024-11-14 03:19:36,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:19:36,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:36,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:36,655 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:36,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 03:19:36,859 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:19:36,859 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:36,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:19:36,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-14 03:19:37,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-14 03:19:37,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76568676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:37,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144462111] [2024-11-14 03:19:37,535 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:19:37,535 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:37,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:37,535 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:37,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:37,658 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:37,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152678#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_844| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_844| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_946| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_946| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_776| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_776| 4294967296) 0)))' at error location [2024-11-14 03:19:37,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:37,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:37,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8, 8] total 32 [2024-11-14 03:19:37,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414683103] [2024-11-14 03:19:37,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:37,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 03:19:37,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:37,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 03:19:37,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:19:37,991 INFO L87 Difference]: Start difference. First operand 1684 states and 2234 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 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 03:19:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:47,171 INFO L93 Difference]: Finished difference Result 3356 states and 4636 transitions. [2024-11-14 03:19:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 03:19:47,172 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 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 47 [2024-11-14 03:19:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:47,178 INFO L225 Difference]: With dead ends: 3356 [2024-11-14 03:19:47,179 INFO L226 Difference]: Without dead ends: 2805 [2024-11-14 03:19:47,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 131 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1037, Invalid=3793, Unknown=0, NotChecked=0, Total=4830 [2024-11-14 03:19:47,180 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 430 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 2906 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:47,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 451 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2906 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 03:19:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2024-11-14 03:19:49,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 1648. [2024-11-14 03:19:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 1.3302975106253794) internal successors, (2191), 1647 states have internal predecessors, (2191), 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 03:19:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2191 transitions. [2024-11-14 03:19:49,768 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2191 transitions. Word has length 47 [2024-11-14 03:19:49,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:49,768 INFO L471 AbstractCegarLoop]: Abstraction has 1648 states and 2191 transitions. [2024-11-14 03:19:49,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 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 03:19:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2191 transitions. [2024-11-14 03:19:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 03:19:49,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:49,770 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:49,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 03:19:49,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-14 03:19:49,975 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:19:49,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:49,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1734963157, now seen corresponding path program 18 times [2024-11-14 03:19:49,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:49,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825279687] [2024-11-14 03:19:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:49,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-11-14 03:19:50,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825279687] [2024-11-14 03:19:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825279687] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840818090] [2024-11-14 03:19:50,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:19:50,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:50,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:50,690 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:50,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 03:19:50,768 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:19:50,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:50,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-14 03:19:50,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-14 03:19:51,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-14 03:19:51,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840818090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:51,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631295284] [2024-11-14 03:19:51,418 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:19:51,418 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:51,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:51,418 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:51,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:51,490 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:51,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '163077#(and (exists ((|v_ULTIMATE.start_main_~x~0#1_1007| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_1007| 4294967296) 0))) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_814| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_814| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_875| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_875| 4294967296) 0)))' at error location [2024-11-14 03:19:51,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:51,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:51,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 30 [2024-11-14 03:19:51,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877675475] [2024-11-14 03:19:51,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:51,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 03:19:51,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 03:19:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:19:51,711 INFO L87 Difference]: Start difference. First operand 1648 states and 2191 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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 03:19:59,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 03:20:03,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 03:20:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:20:07,626 INFO L93 Difference]: Finished difference Result 3518 states and 4485 transitions. [2024-11-14 03:20:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-14 03:20:07,627 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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 49 [2024-11-14 03:20:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:20:07,636 INFO L225 Difference]: With dead ends: 3518 [2024-11-14 03:20:07,636 INFO L226 Difference]: Without dead ends: 3307 [2024-11-14 03:20:07,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 113 SyntacticMatches, 23 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=803, Invalid=3229, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 03:20:07,638 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 200 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:20:07,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 82 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 864 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2024-11-14 03:20:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2024-11-14 03:20:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 1719. [2024-11-14 03:20:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.3050058207217694) internal successors, (2242), 1718 states have internal predecessors, (2242), 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 03:20:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2242 transitions. [2024-11-14 03:20:10,337 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2242 transitions. Word has length 49 [2024-11-14 03:20:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:20:10,337 INFO L471 AbstractCegarLoop]: Abstraction has 1719 states and 2242 transitions. [2024-11-14 03:20:10,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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 03:20:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2242 transitions. [2024-11-14 03:20:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 03:20:10,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:20:10,339 INFO L215 NwaCegarLoop]: trace histogram [18, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:20:10,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-14 03:20:10,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:20:10,540 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:20:10,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:20:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash -465962013, now seen corresponding path program 8 times [2024-11-14 03:20:10,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:20:10,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853303693] [2024-11-14 03:20:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:20:10,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:20:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:20:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 03:20:11,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:20:11,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853303693] [2024-11-14 03:20:11,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853303693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:20:11,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028150181] [2024-11-14 03:20:11,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:20:11,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:20:11,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:20:11,162 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:20:11,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 03:20:11,323 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:20:11,323 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:20:11,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 03:20:11,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:20:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-11-14 03:20:11,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:20:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-11-14 03:20:12,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028150181] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:20:12,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1929361979] [2024-11-14 03:20:12,875 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:20:12,875 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:20:12,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:20:12,875 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:20:12,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:20:12,973 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:20:13,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '173939#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_1037| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_1037| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~y~0#1_901| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_901| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~z~0#1_846| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_846| 4294967296) 0)))' at error location [2024-11-14 03:20:13,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:20:13,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:20:13,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 46 [2024-11-14 03:20:13,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151597195] [2024-11-14 03:20:13,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:20:13,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 03:20:13,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:20:13,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 03:20:13,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2113, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 03:20:13,305 INFO L87 Difference]: Start difference. First operand 1719 states and 2242 transitions. Second operand has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 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 03:20:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:20:25,404 INFO L93 Difference]: Finished difference Result 3221 states and 4398 transitions. [2024-11-14 03:20:25,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2024-11-14 03:20:25,405 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 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 49 [2024-11-14 03:20:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:20:25,413 INFO L225 Difference]: With dead ends: 3221 [2024-11-14 03:20:25,413 INFO L226 Difference]: Without dead ends: 2564 [2024-11-14 03:20:25,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 123 SyntacticMatches, 7 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8304 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3943, Invalid=23447, Unknown=0, NotChecked=0, Total=27390 [2024-11-14 03:20:25,416 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 687 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 6339 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 6598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 6339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:20:25,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 358 Invalid, 6598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 6339 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-14 03:20:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2024-11-14 03:20:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1770. [2024-11-14 03:20:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 1.3199547767100057) internal successors, (2335), 1769 states have internal predecessors, (2335), 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 03:20:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2335 transitions. [2024-11-14 03:20:28,228 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2335 transitions. Word has length 49 [2024-11-14 03:20:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:20:28,228 INFO L471 AbstractCegarLoop]: Abstraction has 1770 states and 2335 transitions. [2024-11-14 03:20:28,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 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 03:20:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2335 transitions. [2024-11-14 03:20:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:20:28,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:20:28,231 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:20:28,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-14 03:20:28,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-14 03:20:28,431 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:20:28,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:20:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1393323017, now seen corresponding path program 19 times [2024-11-14 03:20:28,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:20:28,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044977407] [2024-11-14 03:20:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:20:28,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:20:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:20:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:20:29,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:20:29,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044977407] [2024-11-14 03:20:29,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044977407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:20:29,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778854515] [2024-11-14 03:20:29,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:20:29,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:20:29,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:20:29,233 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:20:29,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 03:20:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:20:29,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-14 03:20:29,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:20:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 22 proven. 134 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-14 03:20:30,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:20:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 22 proven. 134 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-14 03:20:31,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778854515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:20:31,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065838605] [2024-11-14 03:20:31,477 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:20:31,477 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:20:31,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:20:31,477 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:20:31,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:20:31,561 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:20:32,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '184487#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_884| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_884| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_1103| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_1103| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~y~0#1_937| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_937| 4294967296) 0)))' at error location [2024-11-14 03:20:32,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:20:32,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:20:32,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 15, 15] total 42 [2024-11-14 03:20:32,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118347921] [2024-11-14 03:20:32,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:20:32,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 03:20:32,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:20:32,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 03:20:32,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1971, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 03:20:32,048 INFO L87 Difference]: Start difference. First operand 1770 states and 2335 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 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 03:23:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:42,783 INFO L93 Difference]: Finished difference Result 5556 states and 7071 transitions. [2024-11-14 03:23:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1010 states. [2024-11-14 03:23:42,783 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-14 03:23:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:42,795 INFO L225 Difference]: With dead ends: 5556 [2024-11-14 03:23:42,796 INFO L226 Difference]: Without dead ends: 5200 [2024-11-14 03:23:42,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 124 SyntacticMatches, 26 SemanticMatches, 1038 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 508113 ImplicationChecksByTransitivity, 136.3s TimeCoverageRelationStatistics Valid=37373, Invalid=1043187, Unknown=0, NotChecked=0, Total=1080560 [2024-11-14 03:23:42,841 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 1120 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 17217 mSolverCounterSat, 3019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 20236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3019 IncrementalHoareTripleChecker+Valid, 17217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:42,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 94 Invalid, 20236 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3019 Valid, 17217 Invalid, 0 Unknown, 0 Unchecked, 26.5s Time] [2024-11-14 03:23:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5200 states. [2024-11-14 03:23:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5200 to 1908. [2024-11-14 03:23:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 1.311484006292606) internal successors, (2501), 1907 states have internal predecessors, (2501), 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 03:23:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2501 transitions. [2024-11-14 03:23:46,955 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2501 transitions. Word has length 50 [2024-11-14 03:23:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:46,956 INFO L471 AbstractCegarLoop]: Abstraction has 1908 states and 2501 transitions. [2024-11-14 03:23:46,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 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 03:23:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2501 transitions. [2024-11-14 03:23:46,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-14 03:23:46,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:46,959 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:46,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-14 03:23:47,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-14 03:23:47,162 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:23:47,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:47,162 INFO L85 PathProgramCache]: Analyzing trace with hash 321839367, now seen corresponding path program 20 times [2024-11-14 03:23:47,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:47,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9386610] [2024-11-14 03:23:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:47,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:23:47,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:47,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9386610] [2024-11-14 03:23:47,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9386610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:47,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762396265] [2024-11-14 03:23:47,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:23:47,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:47,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:47,791 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:47,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 03:23:48,003 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 03:23:48,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:23:48,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-14 03:23:48,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:23:48,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:23:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:23:48,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762396265] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:23:48,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1626804454] [2024-11-14 03:23:48,507 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:23:48,507 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:23:48,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:23:48,507 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:23:48,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:23:48,597 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:23:48,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '201712#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_969| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_969| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_1174| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_1174| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~z~0#1_916| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_916| 4294967296) 0)))' at error location [2024-11-14 03:23:48,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:23:48,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:23:48,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2024-11-14 03:23:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409344606] [2024-11-14 03:23:48,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:23:48,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:23:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:23:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:23:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:23:48,902 INFO L87 Difference]: Start difference. First operand 1908 states and 2501 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 03:23:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:59,600 INFO L93 Difference]: Finished difference Result 2996 states and 3743 transitions. [2024-11-14 03:23:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:23:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 51 [2024-11-14 03:23:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:59,609 INFO L225 Difference]: With dead ends: 2996 [2024-11-14 03:23:59,609 INFO L226 Difference]: Without dead ends: 2953 [2024-11-14 03:23:59,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 38 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:23:59,610 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:59,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 49 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:23:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2024-11-14 03:24:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1938. [2024-11-14 03:24:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 1.3205988642230253) internal successors, (2558), 1937 states have internal predecessors, (2558), 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 03:24:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2558 transitions. [2024-11-14 03:24:03,214 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2558 transitions. Word has length 51 [2024-11-14 03:24:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:24:03,214 INFO L471 AbstractCegarLoop]: Abstraction has 1938 states and 2558 transitions. [2024-11-14 03:24:03,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 03:24:03,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2558 transitions. [2024-11-14 03:24:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 03:24:03,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:24:03,216 INFO L215 NwaCegarLoop]: trace histogram [19, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:24:03,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-14 03:24:03,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-14 03:24:03,416 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:24:03,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:24:03,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1066500431, now seen corresponding path program 9 times [2024-11-14 03:24:03,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:24:03,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009062085] [2024-11-14 03:24:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:24:03,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:24:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 03:24:04,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:24:04,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009062085] [2024-11-14 03:24:04,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009062085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:24:04,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513051340] [2024-11-14 03:24:04,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:24:04,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:24:04,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:24:04,333 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:24:04,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 03:24:04,439 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:24:04,439 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:24:04,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-14 03:24:04,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:24:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:24:04,773 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:24:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-11-14 03:24:05,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513051340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:24:05,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645161244] [2024-11-14 03:24:05,233 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:24:05,233 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:24:05,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:24:05,234 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:24:05,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:24:05,323 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:24:05,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '211917#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_945| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_945| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~y~0#1_1023| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_1023| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_1205| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_1205| 4294967296) 0))))' at error location [2024-11-14 03:24:05,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:24:05,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:24:05,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 10] total 38 [2024-11-14 03:24:05,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382999585] [2024-11-14 03:24:05,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:24:05,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 03:24:05,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:24:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 03:24:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:24:05,631 INFO L87 Difference]: Start difference. First operand 1938 states and 2558 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 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 03:24:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:24:15,110 INFO L93 Difference]: Finished difference Result 3768 states and 5174 transitions. [2024-11-14 03:24:15,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-14 03:24:15,110 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 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 52 [2024-11-14 03:24:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:24:15,118 INFO L225 Difference]: With dead ends: 3768 [2024-11-14 03:24:15,119 INFO L226 Difference]: Without dead ends: 3227 [2024-11-14 03:24:15,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1265, Invalid=5055, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 03:24:15,121 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 565 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 3657 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 3850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:24:15,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 524 Invalid, 3850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3657 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 03:24:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2024-11-14 03:24:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 2230. [2024-11-14 03:24:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 1.2992373261552266) internal successors, (2896), 2229 states have internal predecessors, (2896), 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 03:24:19,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 2896 transitions. [2024-11-14 03:24:19,535 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 2896 transitions. Word has length 52 [2024-11-14 03:24:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:24:19,535 INFO L471 AbstractCegarLoop]: Abstraction has 2230 states and 2896 transitions. [2024-11-14 03:24:19,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 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 03:24:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 2896 transitions. [2024-11-14 03:24:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 03:24:19,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:24:19,537 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:24:19,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-14 03:24:19,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:24:19,738 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:24:19,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:24:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash 346844615, now seen corresponding path program 21 times [2024-11-14 03:24:19,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:24:19,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290822956] [2024-11-14 03:24:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:24:19,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:24:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:24:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:24:20,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:24:20,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290822956] [2024-11-14 03:24:20,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290822956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:24:20,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892530873] [2024-11-14 03:24:20,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:24:20,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:24:20,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:24:20,511 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:24:20,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_101df43d-1249-486f-9f47-89e160638e96/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 03:24:20,595 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:24:20,595 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:24:20,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-14 03:24:20,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:24:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 24 proven. 158 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-14 03:24:21,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:24:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 24 proven. 158 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-14 03:24:23,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892530873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:24:23,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172078991] [2024-11-14 03:24:23,072 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:24:23,072 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:24:23,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:24:23,072 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:24:23,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:24:23,146 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:24:23,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '224345#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~z~0#1_985| Int)) (<= (mod |v_ULTIMATE.start_main_~z~0#1_985| 4294967296) 0)) (exists ((|v_ULTIMATE.start_main_~x~0#1_1275| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_1275| 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~y~0#1_1061| Int)) (<= (mod |v_ULTIMATE.start_main_~y~0#1_1061| 4294967296) 0)))' at error location [2024-11-14 03:24:23,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:24:23,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:24:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16, 16] total 45 [2024-11-14 03:24:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135612921] [2024-11-14 03:24:23,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:24:23,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 03:24:23,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:24:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 03:24:23,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2247, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:24:23,661 INFO L87 Difference]: Start difference. First operand 2230 states and 2896 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 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)