./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/strchr_short.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/strchr_short.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b9f420c703006a20f84c0f072fc483abdc031419ba97e1947a58423e06686a36 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:44:15,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:44:15,153 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-13 12:44:15,161 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:44:15,161 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:44:15,201 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:44:15,202 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:44:15,202 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:44:15,203 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:44:15,203 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:44:15,203 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:44:15,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:44:15,204 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:44:15,205 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:44:15,205 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:44:15,205 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:44:15,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:44:15,207 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:44:15,207 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 12:44:15,207 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 12:44:15,207 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 12:44:15,207 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:44:15,208 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 12:44:15,208 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:44:15,208 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 12:44:15,208 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:44:15,208 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:44:15,208 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:44:15,208 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:44:15,208 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:44:15,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:44:15,209 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:44:15,209 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:44:15,209 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 12:44:15,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 12:44:15,210 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:44:15,210 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:44:15,210 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:44:15,210 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:44:15,210 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9f420c703006a20f84c0f072fc483abdc031419ba97e1947a58423e06686a36 [2024-11-13 12:44:15,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:44:15,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:44:15,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:44:15,583 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:44:15,584 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:44:15,587 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/termination-dietlibc/strchr_short.i Unable to find full path for "g++" [2024-11-13 12:44:17,661 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:44:17,942 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:44:17,943 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/sv-benchmarks/c/termination-dietlibc/strchr_short.i [2024-11-13 12:44:17,955 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/data/e8bd5bbab/896208a6819147399a349122476ddb81/FLAGe351b6436 [2024-11-13 12:44:17,982 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/data/e8bd5bbab/896208a6819147399a349122476ddb81 [2024-11-13 12:44:17,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:44:17,987 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:44:17,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:44:17,991 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:44:17,996 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:44:17,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:44:17" (1/1) ... [2024-11-13 12:44:17,998 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3236b04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:17, skipping insertion in model container [2024-11-13 12:44:17,998 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:44:17" (1/1) ... [2024-11-13 12:44:18,036 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:44:18,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:44:18,371 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:44:18,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:44:18,438 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:44:18,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18 WrapperNode [2024-11-13 12:44:18,439 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:44:18,440 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:44:18,440 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:44:18,441 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:44:18,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,466 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,488 INFO L138 Inliner]: procedures = 113, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2024-11-13 12:44:18,489 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:44:18,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:44:18,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:44:18,492 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:44:18,502 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,504 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,526 INFO L175 MemorySlicer]: Split 3 memory accesses to 1 slices as follows [3]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2024-11-13 12:44:18,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,539 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,546 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,548 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:44:18,557 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:44:18,557 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:44:18,559 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:44:18,560 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (1/1) ... [2024-11-13 12:44:18,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:44:18,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:18,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:44:18,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:44:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 12:44:18,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 12:44:18,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 12:44:18,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 12:44:18,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:44:18,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:44:18,774 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:44:18,777 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:44:18,998 INFO L? ?]: Removed 29 outVars from TransFormulas that were not future-live. [2024-11-13 12:44:18,998 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:44:19,013 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:44:19,013 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-13 12:44:19,014 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:19 BoogieIcfgContainer [2024-11-13 12:44:19,014 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:44:19,018 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:44:19,018 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:44:19,023 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:44:19,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:44:17" (1/3) ... [2024-11-13 12:44:19,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbecfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:19, skipping insertion in model container [2024-11-13 12:44:19,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:18" (2/3) ... [2024-11-13 12:44:19,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbecfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:19, skipping insertion in model container [2024-11-13 12:44:19,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:19" (3/3) ... [2024-11-13 12:44:19,026 INFO L112 eAbstractionObserver]: Analyzing ICFG strchr_short.i [2024-11-13 12:44:19,046 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:44:19,048 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG strchr_short.i that has 1 procedures, 21 locations, 1 initial locations, 1 loop locations, and 7 error locations. [2024-11-13 12:44:19,096 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:44:19,112 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@68ff454c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:44:19,112 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-13 12:44:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 20 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) [2024-11-13 12:44:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 12:44:19,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:19,129 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 12:44:19,130 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:19,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:19,137 INFO L85 PathProgramCache]: Analyzing trace with hash 925636, now seen corresponding path program 1 times [2024-11-13 12:44:19,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:19,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658545362] [2024-11-13 12:44:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:19,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:19,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:19,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658545362] [2024-11-13 12:44:19,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658545362] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:19,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:19,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:44:19,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667222561] [2024-11-13 12:44:19,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:19,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:44:19,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:19,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:44:19,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:19,385 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 20 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:19,455 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-11-13 12:44:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:44:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-13 12:44:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:19,464 INFO L225 Difference]: With dead ends: 22 [2024-11-13 12:44:19,464 INFO L226 Difference]: Without dead ends: 19 [2024-11-13 12:44:19,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:19,471 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:19,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-13 12:44:19,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-13 12:44:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-11-13 12:44:19,510 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2024-11-13 12:44:19,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:19,510 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-11-13 12:44:19,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-11-13 12:44:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 12:44:19,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:19,514 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 12:44:19,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 12:44:19,514 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:19,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2024-11-13 12:44:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443546986] [2024-11-13 12:44:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:19,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:19,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:19,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443546986] [2024-11-13 12:44:19,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443546986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:19,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:19,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:44:19,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087766556] [2024-11-13 12:44:19,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:19,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:44:19,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:19,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:44:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:19,687 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:19,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:19,743 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2024-11-13 12:44:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:44:19,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-13 12:44:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:19,744 INFO L225 Difference]: With dead ends: 18 [2024-11-13 12:44:19,744 INFO L226 Difference]: Without dead ends: 18 [2024-11-13 12:44:19,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:19,746 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:19,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-13 12:44:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-13 12:44:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-11-13 12:44:19,754 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2024-11-13 12:44:19,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:19,754 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-11-13 12:44:19,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-11-13 12:44:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 12:44:19,755 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:19,756 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 12:44:19,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 12:44:19,756 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:19,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:19,757 INFO L85 PathProgramCache]: Analyzing trace with hash 925670, now seen corresponding path program 1 times [2024-11-13 12:44:19,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:19,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978355205] [2024-11-13 12:44:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:19,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:20,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:20,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978355205] [2024-11-13 12:44:20,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978355205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:20,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:20,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:44:20,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757560205] [2024-11-13 12:44:20,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:20,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:20,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:20,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:20,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:20,037 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:20,071 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2024-11-13 12:44:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-13 12:44:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:20,072 INFO L225 Difference]: With dead ends: 17 [2024-11-13 12:44:20,072 INFO L226 Difference]: Without dead ends: 17 [2024-11-13 12:44:20,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:20,073 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:20,074 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:44:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-13 12:44:20,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-13 12:44:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 16 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) [2024-11-13 12:44:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-13 12:44:20,077 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2024-11-13 12:44:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:20,077 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-13 12:44:20,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-13 12:44:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 12:44:20,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:20,077 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 12:44:20,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 12:44:20,078 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:20,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:20,078 INFO L85 PathProgramCache]: Analyzing trace with hash 889567305, now seen corresponding path program 1 times [2024-11-13 12:44:20,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:20,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011502043] [2024-11-13 12:44:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:20,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:20,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:20,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011502043] [2024-11-13 12:44:20,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011502043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:20,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:20,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:44:20,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849087012] [2024-11-13 12:44:20,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:20,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:20,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:20,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:20,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:20,233 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:20,309 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2024-11-13 12:44:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:20,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-13 12:44:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:20,310 INFO L225 Difference]: With dead ends: 16 [2024-11-13 12:44:20,311 INFO L226 Difference]: Without dead ends: 16 [2024-11-13 12:44:20,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:20,312 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:20,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-13 12:44:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-11-13 12:44:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-13 12:44:20,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 6 [2024-11-13 12:44:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:20,318 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-13 12:44:20,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-13 12:44:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 12:44:20,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:20,319 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 12:44:20,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 12:44:20,321 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:20,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:20,322 INFO L85 PathProgramCache]: Analyzing trace with hash 889567306, now seen corresponding path program 1 times [2024-11-13 12:44:20,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:20,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389812766] [2024-11-13 12:44:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:20,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:20,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:20,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389812766] [2024-11-13 12:44:20,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389812766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:20,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:20,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:44:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054695139] [2024-11-13 12:44:20,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:20,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:44:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:44:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:44:20,666 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:20,743 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-13 12:44:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:44:20,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-13 12:44:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:20,744 INFO L225 Difference]: With dead ends: 21 [2024-11-13 12:44:20,744 INFO L226 Difference]: Without dead ends: 21 [2024-11-13 12:44:20,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:44:20,745 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:20,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 33 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-13 12:44:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-11-13 12:44:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-13 12:44:20,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2024-11-13 12:44:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:20,750 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-13 12:44:20,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-13 12:44:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 12:44:20,751 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:20,751 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:20,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 12:44:20,751 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:20,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1332342744, now seen corresponding path program 1 times [2024-11-13 12:44:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:20,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44523790] [2024-11-13 12:44:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:20,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:20,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:20,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44523790] [2024-11-13 12:44:20,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44523790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:20,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:20,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:44:20,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096110724] [2024-11-13 12:44:20,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:20,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:20,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:20,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:20,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:20,919 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2024-11-13 12:44:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:20,940 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2024-11-13 12:44:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 [2024-11-13 12:44:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:20,941 INFO L225 Difference]: With dead ends: 17 [2024-11-13 12:44:20,941 INFO L226 Difference]: Without dead ends: 14 [2024-11-13 12:44:20,942 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 [2024-11-13 12:44:20,943 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:20,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:44:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-13 12:44:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-13 12:44:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2024-11-13 12:44:20,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2024-11-13 12:44:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:20,948 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2024-11-13 12:44:20,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2024-11-13 12:44:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2024-11-13 12:44:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 12:44:20,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:20,950 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:20,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 12:44:20,951 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:20,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:20,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1332391548, now seen corresponding path program 1 times [2024-11-13 12:44:20,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:20,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793831424] [2024-11-13 12:44:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:20,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:21,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:21,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793831424] [2024-11-13 12:44:21,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793831424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:21,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204649055] [2024-11-13 12:44:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:21,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:21,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:21,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:21,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 12:44:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:21,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 12:44:21,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:21,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:44:21,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:44:21,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-13 12:44:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:22,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:22,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-13 12:44:22,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-13 12:44:22,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:44:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:22,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204649055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:22,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:22,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-11-13 12:44:22,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77837750] [2024-11-13 12:44:22,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:22,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 12:44:22,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:22,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 12:44:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:44:22,535 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 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) [2024-11-13 12:44:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:22,832 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2024-11-13 12:44:22,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:44:22,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 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 10 [2024-11-13 12:44:22,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:22,833 INFO L225 Difference]: With dead ends: 18 [2024-11-13 12:44:22,833 INFO L226 Difference]: Without dead ends: 18 [2024-11-13 12:44:22,834 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-13 12:44:22,835 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:22,835 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:44:22,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-13 12:44:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2024-11-13 12:44:22,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-11-13 12:44:22,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2024-11-13 12:44:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:22,838 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-11-13 12:44:22,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 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) [2024-11-13 12:44:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-11-13 12:44:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 12:44:22,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:22,839 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:22,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 12:44:23,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 12:44:23,044 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:23,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash 623197102, now seen corresponding path program 2 times [2024-11-13 12:44:23,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:23,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832612880] [2024-11-13 12:44:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:23,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:23,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:23,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832612880] [2024-11-13 12:44:23,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832612880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:23,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322430014] [2024-11-13 12:44:23,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:44:23,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:23,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:23,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:23,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 12:44:23,892 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:44:23,893 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:23,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 12:44:23,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:23,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:44:24,389 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2024-11-13 12:44:24,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 23 [2024-11-13 12:44:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:24,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:24,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 12:44:24,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-13 12:44:24,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2024-11-13 12:44:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:25,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322430014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:25,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:25,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-13 12:44:25,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090436962] [2024-11-13 12:44:25,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:25,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 12:44:25,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:25,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 12:44:25,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2024-11-13 12:44:25,008 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 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) [2024-11-13 12:44:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:25,629 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-11-13 12:44:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 12:44:25,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 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) Word has length 14 [2024-11-13 12:44:25,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:25,630 INFO L225 Difference]: With dead ends: 17 [2024-11-13 12:44:25,630 INFO L226 Difference]: Without dead ends: 0 [2024-11-13 12:44:25,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2024-11-13 12:44:25,632 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:25,632 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 58 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:44:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-13 12:44:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-13 12:44:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-13 12:44:25,634 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2024-11-13 12:44:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:25,634 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-13 12:44:25,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 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) [2024-11-13 12:44:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-13 12:44:25,635 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-13 12:44:25,637 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2024-11-13 12:44:25,638 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-13 12:44:25,638 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-13 12:44:25,638 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-13 12:44:25,638 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-13 12:44:25,639 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-13 12:44:25,639 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-13 12:44:25,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 12:44:25,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:25,846 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:25,848 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-13 12:44:25,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 12:44:25 BoogieIcfgContainer [2024-11-13 12:44:25,854 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-13 12:44:25,855 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 12:44:25,855 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 12:44:25,855 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 12:44:25,856 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:19" (3/4) ... [2024-11-13 12:44:25,858 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-13 12:44:25,869 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2024-11-13 12:44:25,870 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-13 12:44:25,870 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-11-13 12:44:25,870 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-13 12:44:25,909 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.witnessprinter has thrown an exception: java.lang.NullPointerException: Cannot invoke "org.eclipse.cdt.core.dom.ast.IASTNode.getRawSignature()" because "" is null at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromIASTNode(CACSLBacktranslationValueProvider.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromStep(CACSLBacktranslationValueProvider.java:61) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromStep(CACSLBacktranslationValueProvider.java:1) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.GeneratedWitnessEdge.getSourceCode(GeneratedWitnessEdge.java:156) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.GraphMLCorrectnessWitnessGenerator.lambda$2(GraphMLCorrectnessWitnessGenerator.java:91) at edu.uci.ics.jung.io.GraphMLWriter.writeEdgeData(GraphMLWriter.java:237) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.UltimateGraphMLWriter.save(UltimateGraphMLWriter.java:106) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.GraphMLCorrectnessWitnessGenerator.makeGraphMLString(GraphMLCorrectnessWitnessGenerator.java:111) at de.uni_freiburg.informatik.ultimate.witnessprinter.WitnessPrinter.generateProofWitness(WitnessPrinter.java:168) at de.uni_freiburg.informatik.ultimate.witnessprinter.WitnessPrinter.finish(WitnessPrinter.java:143) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:130) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 12:44:25,915 INFO L158 Benchmark]: Toolchain (without parser) took 7928.32ms. Allocated memory is still 142.6MB. Free memory was 116.5MB in the beginning and 40.7MB in the end (delta: 75.8MB). Peak memory consumption was 73.2MB. Max. memory is 16.1GB. [2024-11-13 12:44:25,915 INFO L158 Benchmark]: CDTParser took 2.03ms. Allocated memory is still 117.4MB. Free memory is still 74.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:44:25,915 INFO L158 Benchmark]: CACSL2BoogieTranslator took 449.65ms. Allocated memory is still 142.6MB. Free memory was 116.5MB in the beginning and 100.2MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 12:44:25,916 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.36ms. Allocated memory is still 142.6MB. Free memory was 100.2MB in the beginning and 98.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:44:25,916 INFO L158 Benchmark]: Boogie Preprocessor took 66.37ms. Allocated memory is still 142.6MB. Free memory was 98.7MB in the beginning and 97.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:44:25,916 INFO L158 Benchmark]: RCFGBuilder took 457.07ms. Allocated memory is still 142.6MB. Free memory was 97.2MB in the beginning and 86.0MB in the end (delta: 11.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 12:44:25,916 INFO L158 Benchmark]: TraceAbstraction took 6836.56ms. Allocated memory is still 142.6MB. Free memory was 85.4MB in the beginning and 42.3MB in the end (delta: 43.1MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. [2024-11-13 12:44:25,916 INFO L158 Benchmark]: Witness Printer took 59.44ms. Allocated memory is still 142.6MB. Free memory was 42.3MB in the beginning and 40.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:44:25,921 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.03ms. Allocated memory is still 117.4MB. Free memory is still 74.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 449.65ms. Allocated memory is still 142.6MB. Free memory was 116.5MB in the beginning and 100.2MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.36ms. Allocated memory is still 142.6MB. Free memory was 100.2MB in the beginning and 98.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 66.37ms. Allocated memory is still 142.6MB. Free memory was 98.7MB in the beginning and 97.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 457.07ms. Allocated memory is still 142.6MB. Free memory was 97.2MB in the beginning and 86.0MB in the end (delta: 11.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 6836.56ms. Allocated memory is still 142.6MB. Free memory was 85.4MB in the beginning and 42.3MB in the end (delta: 43.1MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. * Witness Printer took 59.44ms. Allocated memory is still 142.6MB. Free memory was 42.3MB in the beginning and 40.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 514]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 6.8s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30 mSDsluCounter, 253 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 159 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 335 IncrementalHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 94 mSDtfsCounter, 335 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 94 ConstructedInterpolants, 13 QuantifiedInterpolants, 1279 SizeOfPredicates, 10 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 3/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold * Results from de.uni_freiburg.informatik.ultimate.witnessprinter: - ExceptionOrErrorResult: NullPointerException: Cannot invoke "org.eclipse.cdt.core.dom.ast.IASTNode.getRawSignature()" because "" is null de.uni_freiburg.informatik.ultimate.witnessprinter: NullPointerException: Cannot invoke "org.eclipse.cdt.core.dom.ast.IASTNode.getRawSignature()" because "" is null: de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromIASTNode(CACSLBacktranslationValueProvider.java:80) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2024-11-13 12:44:25,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/strchr_short.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b9f420c703006a20f84c0f072fc483abdc031419ba97e1947a58423e06686a36 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:44:29,407 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:44:29,564 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2024-11-13 12:44:29,571 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:44:29,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:44:29,653 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:44:29,653 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:44:29,654 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:44:29,655 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:44:29,655 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:44:29,656 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:44:29,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:44:29,657 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:44:29,657 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:44:29,658 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:44:29,658 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:44:29,658 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:44:29,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:44:29,659 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 12:44:29,659 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 12:44:29,659 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 12:44:29,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:44:29,659 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 12:44:29,660 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 12:44:29,660 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:44:29,660 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 12:44:29,660 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 12:44:29,660 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:44:29,661 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:44:29,661 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:44:29,661 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:44:29,662 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:44:29,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:44:29,662 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:44:29,662 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:44:29,662 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 12:44:29,662 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 12:44:29,662 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:44:29,663 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:44:29,663 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:44:29,663 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:44:29,663 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9f420c703006a20f84c0f072fc483abdc031419ba97e1947a58423e06686a36 [2024-11-13 12:44:30,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:44:30,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:44:30,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:44:30,074 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:44:30,074 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:44:30,076 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/termination-dietlibc/strchr_short.i Unable to find full path for "g++" [2024-11-13 12:44:32,403 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:44:32,855 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:44:32,855 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/sv-benchmarks/c/termination-dietlibc/strchr_short.i [2024-11-13 12:44:32,876 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/data/6d28b1b08/dcf45ef802da431ebc44226f19ce37ec/FLAGeb1a345bc [2024-11-13 12:44:32,903 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/data/6d28b1b08/dcf45ef802da431ebc44226f19ce37ec [2024-11-13 12:44:32,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:44:32,908 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:44:32,910 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:44:32,910 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:44:32,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:44:32,918 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:44:32" (1/1) ... [2024-11-13 12:44:32,919 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d3a245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:32, skipping insertion in model container [2024-11-13 12:44:32,919 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:44:32" (1/1) ... [2024-11-13 12:44:32,963 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:44:33,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:44:33,500 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:44:33,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:44:33,588 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:44:33,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33 WrapperNode [2024-11-13 12:44:33,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:44:33,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:44:33,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:44:33,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:44:33,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,627 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,650 INFO L138 Inliner]: procedures = 114, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2024-11-13 12:44:33,652 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:44:33,653 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:44:33,654 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:44:33,654 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:44:33,665 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,674 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,696 INFO L175 MemorySlicer]: Split 3 memory accesses to 1 slices as follows [3]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2024-11-13 12:44:33,696 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,697 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,709 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,716 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,720 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,721 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,726 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:44:33,730 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:44:33,730 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:44:33,730 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:44:33,731 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (1/1) ... [2024-11-13 12:44:33,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:44:33,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:33,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:44:33,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:44:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-11-13 12:44:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 12:44:33,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-11-13 12:44:33,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 12:44:33,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:44:33,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:44:33,945 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:44:33,947 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:44:34,220 INFO L? ?]: Removed 29 outVars from TransFormulas that were not future-live. [2024-11-13 12:44:34,220 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:44:34,230 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:44:34,230 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-13 12:44:34,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:34 BoogieIcfgContainer [2024-11-13 12:44:34,231 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:44:34,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:44:34,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:44:34,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:44:34,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:44:32" (1/3) ... [2024-11-13 12:44:34,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192e6fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:34, skipping insertion in model container [2024-11-13 12:44:34,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:33" (2/3) ... [2024-11-13 12:44:34,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192e6fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:34, skipping insertion in model container [2024-11-13 12:44:34,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:34" (3/3) ... [2024-11-13 12:44:34,242 INFO L112 eAbstractionObserver]: Analyzing ICFG strchr_short.i [2024-11-13 12:44:34,259 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:44:34,261 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG strchr_short.i that has 1 procedures, 21 locations, 1 initial locations, 1 loop locations, and 7 error locations. [2024-11-13 12:44:34,301 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:44:34,314 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@2d69f9ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:44:34,314 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-13 12:44:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 20 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) [2024-11-13 12:44:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 12:44:34,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:34,325 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 12:44:34,325 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:34,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:34,330 INFO L85 PathProgramCache]: Analyzing trace with hash 925636, now seen corresponding path program 1 times [2024-11-13 12:44:34,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:34,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596477215] [2024-11-13 12:44:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:34,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:34,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:34,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 12:44:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:34,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 12:44:34,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:34,469 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:44:34,470 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:44:34,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596477215] [2024-11-13 12:44:34,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596477215] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:34,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:34,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:44:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923570488] [2024-11-13 12:44:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:34,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:44:34,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:44:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:44:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:34,503 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 20 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:34,572 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-11-13 12:44:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:44:34,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-13 12:44:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:34,581 INFO L225 Difference]: With dead ends: 22 [2024-11-13 12:44:34,581 INFO L226 Difference]: Without dead ends: 19 [2024-11-13 12:44:34,583 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 [2024-11-13 12:44:34,586 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:34,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:34,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-13 12:44:34,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-13 12:44:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-11-13 12:44:34,619 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2024-11-13 12:44:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:34,619 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-11-13 12:44:34,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-11-13 12:44:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 12:44:34,620 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:34,620 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 12:44:34,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 12:44:34,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:34,825 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:34,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:34,826 INFO L85 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2024-11-13 12:44:34,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:34,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364382502] [2024-11-13 12:44:34,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:34,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:34,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:34,829 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:34,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 12:44:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:34,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 12:44:34,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:34,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-13 12:44:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:35,001 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:44:35,002 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:44:35,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364382502] [2024-11-13 12:44:35,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364382502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:35,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:35,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:44:35,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378615070] [2024-11-13 12:44:35,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:35,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:44:35,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:44:35,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:44:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:35,005 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:35,078 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2024-11-13 12:44:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:44:35,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-13 12:44:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:35,079 INFO L225 Difference]: With dead ends: 18 [2024-11-13 12:44:35,079 INFO L226 Difference]: Without dead ends: 18 [2024-11-13 12:44:35,079 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 [2024-11-13 12:44:35,080 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:35,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-13 12:44:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-13 12:44:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-11-13 12:44:35,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2024-11-13 12:44:35,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:35,085 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-11-13 12:44:35,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:35,085 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-11-13 12:44:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 12:44:35,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:35,086 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 12:44:35,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 12:44:35,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:35,290 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:35,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:35,290 INFO L85 PathProgramCache]: Analyzing trace with hash 925670, now seen corresponding path program 1 times [2024-11-13 12:44:35,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:35,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969697683] [2024-11-13 12:44:35,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:35,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:35,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:35,293 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:35,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 12:44:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:35,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:44:35,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:35,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-13 12:44:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:35,458 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:44:35,458 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:44:35,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969697683] [2024-11-13 12:44:35,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969697683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:35,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:35,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:44:35,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764577267] [2024-11-13 12:44:35,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:35,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:44:35,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:44:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:44:35,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:35,461 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:35,534 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2024-11-13 12:44:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:44:35,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-13 12:44:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:35,536 INFO L225 Difference]: With dead ends: 17 [2024-11-13 12:44:35,536 INFO L226 Difference]: Without dead ends: 17 [2024-11-13 12:44:35,537 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 [2024-11-13 12:44:35,538 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:35,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-13 12:44:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-13 12:44:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 16 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) [2024-11-13 12:44:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-13 12:44:35,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2024-11-13 12:44:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:35,542 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-13 12:44:35,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-13 12:44:35,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 12:44:35,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:35,543 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 12:44:35,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 12:44:35,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:35,744 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:35,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash 889567305, now seen corresponding path program 1 times [2024-11-13 12:44:35,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:35,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265975989] [2024-11-13 12:44:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:35,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:35,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:35,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 12:44:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:35,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 12:44:35,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:35,889 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:44:35,889 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:44:35,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265975989] [2024-11-13 12:44:35,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265975989] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:35,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:35,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:44:35,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530340692] [2024-11-13 12:44:35,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:35,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:35,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:44:35,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:35,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:35,893 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:36,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:36,036 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2024-11-13 12:44:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:36,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-13 12:44:36,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:36,037 INFO L225 Difference]: With dead ends: 16 [2024-11-13 12:44:36,037 INFO L226 Difference]: Without dead ends: 16 [2024-11-13 12:44:36,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:36,039 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:36,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-13 12:44:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-11-13 12:44:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-13 12:44:36,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 6 [2024-11-13 12:44:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:36,044 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-13 12:44:36,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-13 12:44:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 12:44:36,044 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:36,044 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 12:44:36,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 12:44:36,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:36,245 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:36,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:36,246 INFO L85 PathProgramCache]: Analyzing trace with hash 889567306, now seen corresponding path program 1 times [2024-11-13 12:44:36,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:36,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512497232] [2024-11-13 12:44:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:36,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:36,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:36,249 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:36,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 12:44:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:36,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:44:36,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:36,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-13 12:44:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:36,559 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:44:36,559 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:44:36,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512497232] [2024-11-13 12:44:36,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512497232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:36,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:36,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:44:36,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347476854] [2024-11-13 12:44:36,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:36,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:36,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:44:36,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:36,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:36,561 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:36,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:36,705 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-13 12:44:36,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:36,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-13 12:44:36,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:36,706 INFO L225 Difference]: With dead ends: 21 [2024-11-13 12:44:36,707 INFO L226 Difference]: Without dead ends: 21 [2024-11-13 12:44:36,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:36,708 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:36,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:36,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-13 12:44:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-11-13 12:44:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-13 12:44:36,712 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2024-11-13 12:44:36,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:36,712 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-13 12:44:36,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-13 12:44:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 12:44:36,713 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:36,713 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:36,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 12:44:36,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:36,914 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:36,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:36,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1332342744, now seen corresponding path program 1 times [2024-11-13 12:44:36,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:36,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214236431] [2024-11-13 12:44:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:36,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:36,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:36,917 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:36,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 12:44:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:36,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:44:36,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:37,110 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc6#1.base_6| (_ BitVec 64))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc6#1.base_6| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc6#1.base_6|)))) is different from true [2024-11-13 12:44:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:37,111 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:44:37,111 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:44:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214236431] [2024-11-13 12:44:37,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214236431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:37,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:37,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:44:37,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644100655] [2024-11-13 12:44:37,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:37,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:44:37,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:44:37,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:44:37,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2024-11-13 12:44:37,114 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2024-11-13 12:44:37,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:37,219 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2024-11-13 12:44:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:44:37,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 [2024-11-13 12:44:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:37,220 INFO L225 Difference]: With dead ends: 17 [2024-11-13 12:44:37,220 INFO L226 Difference]: Without dead ends: 14 [2024-11-13 12:44:37,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-11-13 12:44:37,222 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:37,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2024-11-13 12:44:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-13 12:44:37,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-13 12:44:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2024-11-13 12:44:37,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2024-11-13 12:44:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:37,225 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2024-11-13 12:44:37,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2024-11-13 12:44:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2024-11-13 12:44:37,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 12:44:37,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:37,226 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:37,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 12:44:37,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:37,427 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:37,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:37,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1332391548, now seen corresponding path program 1 times [2024-11-13 12:44:37,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:37,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424118878] [2024-11-13 12:44:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:37,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:37,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:37,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:37,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 12:44:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:37,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 12:44:37,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:37,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-13 12:44:37,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 12:44:37,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:44:37,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-13 12:44:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:38,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:39,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-13 12:44:39,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2024-11-13 12:44:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:39,959 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:44:39,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424118878] [2024-11-13 12:44:39,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424118878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:39,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:44:39,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-11-13 12:44:39,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609074433] [2024-11-13 12:44:39,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:39,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:44:39,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:44:39,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:44:39,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:44:39,962 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 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) [2024-11-13 12:44:41,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:41,043 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2024-11-13 12:44:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:44:41,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 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) Word has length 10 [2024-11-13 12:44:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:41,046 INFO L225 Difference]: With dead ends: 19 [2024-11-13 12:44:41,047 INFO L226 Difference]: Without dead ends: 19 [2024-11-13 12:44:41,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:44:41,049 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:41,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 12:44:41,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-13 12:44:41,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-13 12:44:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2024-11-13 12:44:41,057 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2024-11-13 12:44:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:41,058 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2024-11-13 12:44:41,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 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) [2024-11-13 12:44:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2024-11-13 12:44:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 12:44:41,058 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:41,059 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:41,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 12:44:41,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:41,259 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:41,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1402068960, now seen corresponding path program 2 times [2024-11-13 12:44:41,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:41,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947644778] [2024-11-13 12:44:41,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:44:41,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:41,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:41,263 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:41,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 12:44:41,366 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:44:41,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:41,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 12:44:41,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:41,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-13 12:44:41,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 12:44:42,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:44:42,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-13 12:44:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:42,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:45,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-13 12:44:45,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-13 12:44:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:46,617 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:44:46,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947644778] [2024-11-13 12:44:46,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947644778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:46,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:44:46,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2024-11-13 12:44:46,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444312811] [2024-11-13 12:44:46,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:46,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 12:44:46,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:44:46,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 12:44:46,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-13 12:44:46,619 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 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) [2024-11-13 12:44:53,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:44:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:53,719 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2024-11-13 12:44:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 12:44:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 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 18 [2024-11-13 12:44:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:53,721 INFO L225 Difference]: With dead ends: 35 [2024-11-13 12:44:53,721 INFO L226 Difference]: Without dead ends: 35 [2024-11-13 12:44:53,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2024-11-13 12:44:53,722 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:53,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 56 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-11-13 12:44:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-13 12:44:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-13 12:44:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2024-11-13 12:44:53,727 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 18 [2024-11-13 12:44:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:53,727 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2024-11-13 12:44:53,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 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) [2024-11-13 12:44:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2024-11-13 12:44:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 12:44:53,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:53,728 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:53,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 12:44:53,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:53,929 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:44:53,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash 548624040, now seen corresponding path program 3 times [2024-11-13 12:44:53,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:44:53,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822612199] [2024-11-13 12:44:53,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:44:53,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:53,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:53,932 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:53,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 12:44:54,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-13 12:44:54,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:54,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 12:44:54,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:54,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-13 12:44:54,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 12:44:55,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:44:55,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-13 12:44:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:55,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:02,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-13 12:45:02,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-13 12:45:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:03,648 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:45:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822612199] [2024-11-13 12:45:03,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822612199] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:03,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:45:03,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2024-11-13 12:45:03,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888023782] [2024-11-13 12:45:03,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:03,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 12:45:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:45:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 12:45:03,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:45:03,651 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:16,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:45:24,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:45:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:31,632 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2024-11-13 12:45:31,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 12:45:31,633 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2024-11-13 12:45:31,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:31,634 INFO L225 Difference]: With dead ends: 67 [2024-11-13 12:45:31,634 INFO L226 Difference]: Without dead ends: 67 [2024-11-13 12:45:31,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=591, Invalid=2061, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 12:45:31,637 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:31,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 140 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 378 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2024-11-13 12:45:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-13 12:45:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-13 12:45:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2024-11-13 12:45:31,644 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 34 [2024-11-13 12:45:31,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:31,644 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2024-11-13 12:45:31,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2024-11-13 12:45:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 12:45:31,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:31,647 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:31,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 12:45:31,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:31,847 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:45:31,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1489857480, now seen corresponding path program 4 times [2024-11-13 12:45:31,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:45:31,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812224870] [2024-11-13 12:45:31,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:45:31,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:31,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:31,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:31,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 12:45:32,036 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:45:32,036 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:32,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-13 12:45:32,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:32,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-13 12:45:32,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 12:45:34,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:45:34,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-13 12:45:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:35,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:52,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-13 12:45:52,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-13 12:45:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:54,245 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:45:54,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812224870] [2024-11-13 12:45:54,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812224870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:54,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:45:54,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2024-11-13 12:45:54,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615456312] [2024-11-13 12:45:54,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:54,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 12:45:54,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:45:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 12:45:54,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 12:45:54,252 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 43 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:20,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:46:38,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:46:55,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:47:11,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:47:25,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:47:38,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:47:52,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:48:05,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:48:17,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:48:28,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:48:38,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:48:47,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:48:55,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:48:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:57,495 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2024-11-13 12:48:57,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-13 12:48:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 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 66 [2024-11-13 12:48:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:57,497 INFO L225 Difference]: With dead ends: 131 [2024-11-13 12:48:57,497 INFO L226 Difference]: Without dead ends: 131 [2024-11-13 12:48:57,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 139.6s TimeCoverageRelationStatistics Valid=2259, Invalid=7641, Unknown=0, NotChecked=0, Total=9900 [2024-11-13 12:48:57,503 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 128 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 18 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:57,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 426 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1202 Invalid, 13 Unknown, 0 Unchecked, 58.5s Time] [2024-11-13 12:48:57,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-13 12:48:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2024-11-13 12:48:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:48:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2024-11-13 12:48:57,514 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 66 [2024-11-13 12:48:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:57,514 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2024-11-13 12:48:57,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:48:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2024-11-13 12:48:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-13 12:48:57,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:57,519 INFO L215 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:57,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 12:48:57,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:57,720 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-13 12:48:57,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash 211963736, now seen corresponding path program 5 times [2024-11-13 12:48:57,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:57,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942017275] [2024-11-13 12:48:57,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:48:57,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:57,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:57,729 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:57,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab3830d-2d3a-4710-941f-6bc09df12080/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 12:48:58,363 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2024-11-13 12:48:58,363 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:48:58,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-13 12:48:58,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:58,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-13 12:48:58,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 12:49:05,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:49:05,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-13 12:49:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:49:06,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:50:02,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-13 12:50:02,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-13 12:50:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:50:05,267 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:50:05,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942017275] [2024-11-13 12:50:05,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942017275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:50:05,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:50:05,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 74 [2024-11-13 12:50:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615198495] [2024-11-13 12:50:05,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:50:05,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-13 12:50:05,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:50:05,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-13 12:50:05,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=4366, Unknown=0, NotChecked=0, Total=5550 [2024-11-13 12:50:05,273 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 75 states, 74 states have (on average 3.4864864864864864) internal successors, (258), 75 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:51:03,129 WARN L286 SmtUtils]: Spent 21.79s on a formula simplification. DAG size of input: 340 DAG size of output: 311 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:51:37,528 WARN L286 SmtUtils]: Spent 25.46s on a formula simplification. DAG size of input: 343 DAG size of output: 314 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:51:41,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:52:11,582 WARN L286 SmtUtils]: Spent 24.65s on a formula simplification. DAG size of input: 331 DAG size of output: 301 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:52:44,031 WARN L286 SmtUtils]: Spent 22.89s on a formula simplification. DAG size of input: 329 DAG size of output: 301 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:53:15,529 WARN L286 SmtUtils]: Spent 22.56s on a formula simplification. DAG size of input: 332 DAG size of output: 304 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:53:19,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:53:48,701 WARN L286 SmtUtils]: Spent 22.93s on a formula simplification. DAG size of input: 320 DAG size of output: 291 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:54:25,741 WARN L286 SmtUtils]: Spent 17.35s on a formula simplification. DAG size of input: 321 DAG size of output: 294 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:54:29,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:54:59,191 WARN L286 SmtUtils]: Spent 23.00s on a formula simplification. DAG size of input: 309 DAG size of output: 281 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:55:39,354 WARN L286 SmtUtils]: Spent 21.15s on a formula simplification. DAG size of input: 310 DAG size of output: 284 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:55:43,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:56:09,118 WARN L286 SmtUtils]: Spent 19.70s on a formula simplification. DAG size of input: 298 DAG size of output: 271 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:56:48,228 WARN L286 SmtUtils]: Spent 19.77s on a formula simplification. DAG size of input: 299 DAG size of output: 274 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:56:52,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:57:16,400 WARN L286 SmtUtils]: Spent 17.75s on a formula simplification. DAG size of input: 287 DAG size of output: 261 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:57:53,868 WARN L286 SmtUtils]: Spent 17.67s on a formula simplification. DAG size of input: 288 DAG size of output: 264 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:57:57,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:58:17,707 WARN L286 SmtUtils]: Spent 13.76s on a formula simplification. DAG size of input: 276 DAG size of output: 251 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:58:51,580 WARN L286 SmtUtils]: Spent 15.95s on a formula simplification. DAG size of input: 277 DAG size of output: 254 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 12:58:55,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 12:59:18,316 WARN L286 SmtUtils]: Spent 15.16s on a formula simplification. DAG size of input: 265 DAG size of output: 241 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)