./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 32bit --witnessprinter.graph.data.programhash 0286582125bb2879636b8cf3b934bed172850a3a3b0d880c07306d10439134a7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 16:03:45,325 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 16:03:45,412 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 16:03:45,416 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 16:03:45,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 16:03:45,443 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 16:03:45,443 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 16:03:45,444 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 16:03:45,445 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 16:03:45,448 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 16:03:45,448 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 16:03:45,449 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 16:03:45,449 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 16:03:45,449 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 16:03:45,450 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 16:03:45,450 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 16:03:45,450 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 16:03:45,450 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 16:03:45,451 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 16:03:45,451 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 16:03:45,451 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 16:03:45,453 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 16:03:45,453 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 16:03:45,453 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 16:03:45,454 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 16:03:45,454 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 16:03:45,454 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 16:03:45,454 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 16:03:45,455 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 16:03:45,455 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 16:03:45,455 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 16:03:45,455 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 16:03:45,455 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 16:03:45,456 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:03:45,456 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 16:03:45,456 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 16:03:45,456 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 16:03:45,456 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 16:03:45,457 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 16:03:45,457 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 16:03:45,457 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 16:03:45,459 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 16:03:45,459 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0286582125bb2879636b8cf3b934bed172850a3a3b0d880c07306d10439134a7 [2024-10-24 16:03:45,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 16:03:45,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 16:03:45,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 16:03:45,740 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 16:03:45,741 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 16:03:45,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i [2024-10-24 16:03:47,241 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 16:03:47,436 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 16:03:47,437 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i [2024-10-24 16:03:47,443 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8bed63e7/774d0a2486b043a68822147fb233814b/FLAG76491ea91 [2024-10-24 16:03:47,456 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8bed63e7/774d0a2486b043a68822147fb233814b [2024-10-24 16:03:47,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 16:03:47,459 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 16:03:47,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 16:03:47,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 16:03:47,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 16:03:47,467 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5fa1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47, skipping insertion in model container [2024-10-24 16:03:47,468 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,490 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 16:03:47,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:03:47,727 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 16:03:47,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:03:47,782 INFO L204 MainTranslator]: Completed translation [2024-10-24 16:03:47,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47 WrapperNode [2024-10-24 16:03:47,783 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 16:03:47,796 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 16:03:47,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 16:03:47,802 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 16:03:47,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,831 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,879 INFO L138 Inliner]: procedures = 18, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 166 [2024-10-24 16:03:47,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 16:03:47,881 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 16:03:47,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 16:03:47,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 16:03:47,891 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,894 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,913 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 9, 3]. 64 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-10-24 16:03:47,914 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 16:03:47,942 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 16:03:47,942 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 16:03:47,942 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 16:03:47,943 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (1/1) ... [2024-10-24 16:03:47,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:03:47,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:47,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 16:03:47,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 16:03:48,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 16:03:48,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 16:03:48,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 16:03:48,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 16:03:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 16:03:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 16:03:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 16:03:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 16:03:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 16:03:48,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 16:03:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 16:03:48,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 16:03:48,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 16:03:48,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 16:03:48,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 16:03:48,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 16:03:48,119 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 16:03:48,120 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 16:03:48,397 INFO L? ?]: Removed 86 outVars from TransFormulas that were not future-live. [2024-10-24 16:03:48,397 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 16:03:48,448 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 16:03:48,448 INFO L314 CfgBuilder]: Removed 10 assume(true) statements. [2024-10-24 16:03:48,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:03:48 BoogieIcfgContainer [2024-10-24 16:03:48,449 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 16:03:48,451 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 16:03:48,451 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 16:03:48,454 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 16:03:48,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:03:47" (1/3) ... [2024-10-24 16:03:48,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151463ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:03:48, skipping insertion in model container [2024-10-24 16:03:48,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:03:47" (2/3) ... [2024-10-24 16:03:48,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151463ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:03:48, skipping insertion in model container [2024-10-24 16:03:48,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:03:48" (3/3) ... [2024-10-24 16:03:48,458 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2024-10-24 16:03:48,479 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 16:03:48,480 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2024-10-24 16:03:48,534 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 16:03:48,541 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;@3a0f64df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 16:03:48,542 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-10-24 16:03:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 73 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 16:03:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-24 16:03:48,553 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:48,553 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-24 16:03:48,554 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:48,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:48,558 INFO L85 PathProgramCache]: Analyzing trace with hash 256909, now seen corresponding path program 1 times [2024-10-24 16:03:48,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:48,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119198336] [2024-10-24 16:03:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:48,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:48,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:48,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119198336] [2024-10-24 16:03:48,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119198336] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:48,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:03:48,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:03:48,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468857562] [2024-10-24 16:03:48,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:48,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:03:48,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:48,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:03:48,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:03:48,814 INFO L87 Difference]: Start difference. First operand has 78 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 73 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:48,941 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2024-10-24 16:03:48,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:03:48,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-10-24 16:03:48,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:48,951 INFO L225 Difference]: With dead ends: 70 [2024-10-24 16:03:48,952 INFO L226 Difference]: Without dead ends: 69 [2024-10-24 16:03:48,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:03:48,959 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 58 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:48,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 55 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-24 16:03:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-24 16:03:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 64 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 16:03:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2024-10-24 16:03:48,996 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 3 [2024-10-24 16:03:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:48,996 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2024-10-24 16:03:48,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2024-10-24 16:03:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-24 16:03:48,999 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:48,999 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-24 16:03:48,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 16:03:48,999 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:49,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash 256910, now seen corresponding path program 1 times [2024-10-24 16:03:49,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:49,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273388221] [2024-10-24 16:03:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:49,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:49,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:49,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273388221] [2024-10-24 16:03:49,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273388221] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:49,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:03:49,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:03:49,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214328884] [2024-10-24 16:03:49,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:49,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:03:49,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:49,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:03:49,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:03:49,144 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:49,247 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2024-10-24 16:03:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:03:49,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-10-24 16:03:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:49,248 INFO L225 Difference]: With dead ends: 71 [2024-10-24 16:03:49,250 INFO L226 Difference]: Without dead ends: 71 [2024-10-24 16:03:49,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:03:49,251 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:49,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-24 16:03:49,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-10-24 16:03:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.625) internal successors, (78), 66 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 16:03:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2024-10-24 16:03:49,268 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 3 [2024-10-24 16:03:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:49,268 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2024-10-24 16:03:49,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:49,269 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2024-10-24 16:03:49,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-24 16:03:49,269 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:49,269 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-10-24 16:03:49,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 16:03:49,269 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:49,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash 247108980, now seen corresponding path program 1 times [2024-10-24 16:03:49,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:49,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419085689] [2024-10-24 16:03:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:49,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:49,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:49,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419085689] [2024-10-24 16:03:49,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419085689] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:49,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18071466] [2024-10-24 16:03:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:49,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:49,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:49,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:03:49,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 16:03:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:49,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 16:03:49,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:49,615 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 8 treesize of output 1 [2024-10-24 16:03:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:49,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:49,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18071466] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:49,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:49,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-10-24 16:03:49,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291963934] [2024-10-24 16:03:49,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:49,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 16:03:49,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 16:03:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:03:49,778 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:49,980 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2024-10-24 16:03:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:03:49,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-24 16:03:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:49,981 INFO L225 Difference]: With dead ends: 86 [2024-10-24 16:03:49,981 INFO L226 Difference]: Without dead ends: 86 [2024-10-24 16:03:49,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:03:49,983 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:49,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 135 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:03:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-24 16:03:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2024-10-24 16:03:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 78 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 16:03:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2024-10-24 16:03:49,996 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 5 [2024-10-24 16:03:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:49,996 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2024-10-24 16:03:49,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2024-10-24 16:03:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-24 16:03:50,000 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:50,000 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:50,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 16:03:50,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:50,201 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:50,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1587345124, now seen corresponding path program 1 times [2024-10-24 16:03:50,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:50,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9540309] [2024-10-24 16:03:50,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:50,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:03:50,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:50,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9540309] [2024-10-24 16:03:50,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9540309] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:50,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:03:50,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:03:50,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687278467] [2024-10-24 16:03:50,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:50,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:03:50,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:50,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:03:50,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:03:50,315 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:50,376 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2024-10-24 16:03:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:03:50,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-24 16:03:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:50,377 INFO L225 Difference]: With dead ends: 93 [2024-10-24 16:03:50,377 INFO L226 Difference]: Without dead ends: 93 [2024-10-24 16:03:50,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:03:50,378 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 32 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:50,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 122 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-24 16:03:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2024-10-24 16:03:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 82 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2024-10-24 16:03:50,387 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 10 [2024-10-24 16:03:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:50,387 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2024-10-24 16:03:50,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2024-10-24 16:03:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 16:03:50,388 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:50,388 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:50,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 16:03:50,389 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:50,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:50,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1963100095, now seen corresponding path program 1 times [2024-10-24 16:03:50,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:50,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469221533] [2024-10-24 16:03:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:50,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:03:50,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:50,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469221533] [2024-10-24 16:03:50,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469221533] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:50,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:03:50,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:03:50,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798582294] [2024-10-24 16:03:50,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:50,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:03:50,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:50,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:03:50,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:03:50,466 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:50,507 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2024-10-24 16:03:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:03:50,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-24 16:03:50,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:50,508 INFO L225 Difference]: With dead ends: 83 [2024-10-24 16:03:50,508 INFO L226 Difference]: Without dead ends: 83 [2024-10-24 16:03:50,509 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 [2024-10-24 16:03:50,509 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:50,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 57 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:03:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-24 16:03:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-10-24 16:03:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 79 states have internal predecessors, (100), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2024-10-24 16:03:50,516 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 11 [2024-10-24 16:03:50,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:50,516 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2024-10-24 16:03:50,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2024-10-24 16:03:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 16:03:50,517 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:50,517 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:50,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 16:03:50,518 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:50,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:50,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1963100094, now seen corresponding path program 1 times [2024-10-24 16:03:50,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:50,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058533694] [2024-10-24 16:03:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:50,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:50,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:50,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058533694] [2024-10-24 16:03:50,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058533694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:50,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105302276] [2024-10-24 16:03:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:50,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:50,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:50,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:03:50,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 16:03:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:50,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 16:03:50,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:50,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:50,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105302276] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:50,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:50,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-24 16:03:50,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393296625] [2024-10-24 16:03:50,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:50,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:03:50,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:50,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:03:50,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:03:50,683 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2024-10-24 16:03:50,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:50,854 INFO L93 Difference]: Finished difference Result 206 states and 286 transitions. [2024-10-24 16:03:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:03:50,855 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) Word has length 11 [2024-10-24 16:03:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:50,857 INFO L225 Difference]: With dead ends: 206 [2024-10-24 16:03:50,857 INFO L226 Difference]: Without dead ends: 206 [2024-10-24 16:03:50,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:03:50,858 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:50,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 169 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:03:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-10-24 16:03:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 86. [2024-10-24 16:03:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 82 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-10-24 16:03:50,869 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 11 [2024-10-24 16:03:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:50,869 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-10-24 16:03:50,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2024-10-24 16:03:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-10-24 16:03:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 16:03:50,870 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:50,870 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2024-10-24 16:03:50,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 16:03:51,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-24 16:03:51,075 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:51,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1702966746, now seen corresponding path program 2 times [2024-10-24 16:03:51,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:51,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78052331] [2024-10-24 16:03:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:51,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:51,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:51,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78052331] [2024-10-24 16:03:51,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78052331] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:51,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294551337] [2024-10-24 16:03:51,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:03:51,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:51,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:51,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:03:51,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 16:03:51,382 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:03:51,383 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:03:51,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 16:03:51,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:51,397 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 8 treesize of output 1 [2024-10-24 16:03:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:51,536 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:03:51,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294551337] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:51,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:03:51,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-24 16:03:51,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376523760] [2024-10-24 16:03:51,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:51,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 16:03:51,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 16:03:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-24 16:03:51,538 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:51,610 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2024-10-24 16:03:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:03:51,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-24 16:03:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:51,611 INFO L225 Difference]: With dead ends: 85 [2024-10-24 16:03:51,611 INFO L226 Difference]: Without dead ends: 85 [2024-10-24 16:03:51,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-24 16:03:51,612 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:51,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:03:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-24 16:03:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-10-24 16:03:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 81 states have internal predecessors, (100), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2024-10-24 16:03:51,621 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 11 [2024-10-24 16:03:51,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:51,624 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2024-10-24 16:03:51,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2024-10-24 16:03:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-24 16:03:51,625 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:51,625 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:51,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 16:03:51,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:51,826 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:51,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:51,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1817984730, now seen corresponding path program 2 times [2024-10-24 16:03:51,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:51,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422055964] [2024-10-24 16:03:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:51,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:03:51,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:51,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422055964] [2024-10-24 16:03:51,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422055964] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:51,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549480573] [2024-10-24 16:03:51,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:03:51,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:51,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:51,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:03:51,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 16:03:52,026 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 16:03:52,026 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:03:52,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 16:03:52,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:52,048 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 8 treesize of output 1 [2024-10-24 16:03:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-24 16:03:52,073 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:03:52,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549480573] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:52,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:03:52,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2024-10-24 16:03:52,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459454680] [2024-10-24 16:03:52,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:52,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:03:52,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:52,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:03:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:03:52,075 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:52,120 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2024-10-24 16:03:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:03:52,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-24 16:03:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:52,121 INFO L225 Difference]: With dead ends: 87 [2024-10-24 16:03:52,122 INFO L226 Difference]: Without dead ends: 87 [2024-10-24 16:03:52,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:03:52,122 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:52,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:03:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-24 16:03:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-10-24 16:03:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.4366197183098592) internal successors, (102), 83 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2024-10-24 16:03:52,132 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 19 [2024-10-24 16:03:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:52,133 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2024-10-24 16:03:52,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2024-10-24 16:03:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:03:52,134 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:52,134 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:52,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 16:03:52,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:52,334 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:52,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash -968196663, now seen corresponding path program 1 times [2024-10-24 16:03:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:52,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522359982] [2024-10-24 16:03:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:03:52,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:52,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522359982] [2024-10-24 16:03:52,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522359982] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:52,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106513622] [2024-10-24 16:03:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:52,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:52,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:52,453 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:03:52,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 16:03:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:52,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 16:03:52,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:03:52,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:03:52,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106513622] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:52,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:52,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-10-24 16:03:52,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917078878] [2024-10-24 16:03:52,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:52,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 16:03:52,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 16:03:52,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-24 16:03:52,684 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2024-10-24 16:03:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:53,038 INFO L93 Difference]: Finished difference Result 383 states and 542 transitions. [2024-10-24 16:03:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 16:03:53,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 21 [2024-10-24 16:03:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:53,041 INFO L225 Difference]: With dead ends: 383 [2024-10-24 16:03:53,041 INFO L226 Difference]: Without dead ends: 383 [2024-10-24 16:03:53,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-24 16:03:53,042 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 575 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:53,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 223 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:03:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-10-24 16:03:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 103. [2024-10-24 16:03:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 99 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2024-10-24 16:03:53,059 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 21 [2024-10-24 16:03:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:53,059 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2024-10-24 16:03:53,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2024-10-24 16:03:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2024-10-24 16:03:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-24 16:03:53,060 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:53,060 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:53,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 16:03:53,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:53,262 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:53,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:53,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1093191943, now seen corresponding path program 2 times [2024-10-24 16:03:53,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:53,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964531806] [2024-10-24 16:03:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:53,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:03:53,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:53,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964531806] [2024-10-24 16:03:53,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964531806] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:53,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98940288] [2024-10-24 16:03:53,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:03:53,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:53,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:53,573 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:03:53,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 16:03:53,668 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:03:53,668 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:03:53,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 16:03:53,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:03:53,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:03:54,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98940288] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:54,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:54,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-10-24 16:03:54,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697654936] [2024-10-24 16:03:54,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:54,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-24 16:03:54,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:54,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-24 16:03:54,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-24 16:03:54,122 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:54,867 INFO L93 Difference]: Finished difference Result 735 states and 1054 transitions. [2024-10-24 16:03:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-24 16:03:54,867 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 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 37 [2024-10-24 16:03:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:54,870 INFO L225 Difference]: With dead ends: 735 [2024-10-24 16:03:54,871 INFO L226 Difference]: Without dead ends: 735 [2024-10-24 16:03:54,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-24 16:03:54,873 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 1626 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:54,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 351 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 16:03:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-10-24 16:03:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 135. [2024-10-24 16:03:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.2605042016806722) internal successors, (150), 131 states have internal predecessors, (150), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2024-10-24 16:03:54,901 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 37 [2024-10-24 16:03:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:54,901 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2024-10-24 16:03:54,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2024-10-24 16:03:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-24 16:03:54,903 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:54,903 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:54,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 16:03:55,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:55,107 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:55,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:55,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1216842073, now seen corresponding path program 3 times [2024-10-24 16:03:55,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:55,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276000043] [2024-10-24 16:03:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:55,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:03:56,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:56,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276000043] [2024-10-24 16:03:56,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276000043] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:56,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001273983] [2024-10-24 16:03:56,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:03:56,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:56,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:56,136 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:03:56,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 16:03:56,218 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 16:03:56,219 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:03:56,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 16:03:56,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:56,232 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 8 treesize of output 1 [2024-10-24 16:03:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2024-10-24 16:03:56,339 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:03:56,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001273983] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:03:56,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:03:56,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [32] total 36 [2024-10-24 16:03:56,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773744845] [2024-10-24 16:03:56,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:03:56,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:03:56,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:03:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=723, Unknown=0, NotChecked=0, Total=1260 [2024-10-24 16:03:56,342 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:03:56,383 INFO L93 Difference]: Finished difference Result 134 states and 153 transitions. [2024-10-24 16:03:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:03:56,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-10-24 16:03:56,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:03:56,384 INFO L225 Difference]: With dead ends: 134 [2024-10-24 16:03:56,384 INFO L226 Difference]: Without dead ends: 134 [2024-10-24 16:03:56,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=723, Unknown=0, NotChecked=0, Total=1260 [2024-10-24 16:03:56,385 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:03:56,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:03:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-24 16:03:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2024-10-24 16:03:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 129 states have internal predecessors, (148), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:03:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2024-10-24 16:03:56,390 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 69 [2024-10-24 16:03:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:03:56,391 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2024-10-24 16:03:56,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:03:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2024-10-24 16:03:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-24 16:03:56,393 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:03:56,393 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:03:56,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-24 16:03:56,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:56,594 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:03:56,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:03:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1154077349, now seen corresponding path program 1 times [2024-10-24 16:03:56,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:03:56,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337526605] [2024-10-24 16:03:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:56,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:03:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2024-10-24 16:03:56,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:03:56,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337526605] [2024-10-24 16:03:56,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337526605] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:03:56,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743530319] [2024-10-24 16:03:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:03:56,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:03:56,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:03:56,723 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:03:56,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 16:03:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:03:56,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 16:03:56,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:03:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:03:57,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:03:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:03:58,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743530319] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:03:58,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:03:58,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 32, 32] total 66 [2024-10-24 16:03:58,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866511127] [2024-10-24 16:03:58,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:03:58,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-24 16:03:58,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:03:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-24 16:03:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2024-10-24 16:03:58,465 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 66 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:06,505 INFO L93 Difference]: Finished difference Result 2748 states and 4031 transitions. [2024-10-24 16:04:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2024-10-24 16:04:06,507 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 66 states have internal predecessors, (143), 0 states have call successors, (0), 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 71 [2024-10-24 16:04:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:06,517 INFO L225 Difference]: With dead ends: 2748 [2024-10-24 16:04:06,517 INFO L226 Difference]: Without dead ends: 2748 [2024-10-24 16:04:06,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8558 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12096, Invalid=23814, Unknown=0, NotChecked=0, Total=35910 [2024-10-24 16:04:06,534 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 7625 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 1478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7751 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1478 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:06,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7751 Valid, 738 Invalid, 2509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1478 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-24 16:04:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2024-10-24 16:04:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 225. [2024-10-24 16:04:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 209 states have (on average 1.2105263157894737) internal successors, (253), 220 states have internal predecessors, (253), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 16:04:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 259 transitions. [2024-10-24 16:04:06,588 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 259 transitions. Word has length 71 [2024-10-24 16:04:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:06,588 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 259 transitions. [2024-10-24 16:04:06,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 66 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 259 transitions. [2024-10-24 16:04:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-10-24 16:04:06,595 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:06,595 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:06,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 16:04:06,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-24 16:04:06,797 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:04:06,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:06,797 INFO L85 PathProgramCache]: Analyzing trace with hash 682697428, now seen corresponding path program 2 times [2024-10-24 16:04:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:06,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848201561] [2024-10-24 16:04:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3845 trivial. 0 not checked. [2024-10-24 16:04:07,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:07,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848201561] [2024-10-24 16:04:07,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848201561] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:07,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587694993] [2024-10-24 16:04:07,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:04:07,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:07,148 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:07,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 16:04:07,273 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 16:04:07,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:07,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 16:04:07,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:07,306 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 8 treesize of output 1 [2024-10-24 16:04:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3848 trivial. 0 not checked. [2024-10-24 16:04:07,344 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:04:07,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587694993] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:07,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:04:07,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-10-24 16:04:07,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458795213] [2024-10-24 16:04:07,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:07,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:04:07,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:07,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:04:07,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:04:07,346 INFO L87 Difference]: Start difference. First operand 225 states and 259 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:07,416 INFO L93 Difference]: Finished difference Result 231 states and 257 transitions. [2024-10-24 16:04:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:04:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 137 [2024-10-24 16:04:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:07,418 INFO L225 Difference]: With dead ends: 231 [2024-10-24 16:04:07,418 INFO L226 Difference]: Without dead ends: 231 [2024-10-24 16:04:07,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:04:07,418 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:07,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-10-24 16:04:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2024-10-24 16:04:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 209 states have (on average 1.200956937799043) internal successors, (251), 220 states have internal predecessors, (251), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 16:04:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 257 transitions. [2024-10-24 16:04:07,423 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 257 transitions. Word has length 137 [2024-10-24 16:04:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:07,425 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 257 transitions. [2024-10-24 16:04:07,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 257 transitions. [2024-10-24 16:04:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-10-24 16:04:07,429 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:07,429 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:07,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 16:04:07,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-24 16:04:07,630 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:04:07,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:07,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1057625689, now seen corresponding path program 1 times [2024-10-24 16:04:07,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:07,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557953092] [2024-10-24 16:04:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:07,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3848 trivial. 0 not checked. [2024-10-24 16:04:07,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:07,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557953092] [2024-10-24 16:04:07,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557953092] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:07,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:07,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:04:07,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022628370] [2024-10-24 16:04:07,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:07,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:04:07,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:07,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:04:07,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:07,891 INFO L87 Difference]: Start difference. First operand 225 states and 257 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2024-10-24 16:04:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:07,931 INFO L93 Difference]: Finished difference Result 224 states and 247 transitions. [2024-10-24 16:04:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:04:07,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) Word has length 139 [2024-10-24 16:04:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:07,933 INFO L225 Difference]: With dead ends: 224 [2024-10-24 16:04:07,933 INFO L226 Difference]: Without dead ends: 224 [2024-10-24 16:04:07,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:04:07,933 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:07,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 140 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-10-24 16:04:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2024-10-24 16:04:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 205 states have (on average 1.1658536585365853) internal successors, (239), 216 states have internal predecessors, (239), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 16:04:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2024-10-24 16:04:07,938 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 139 [2024-10-24 16:04:07,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:07,939 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2024-10-24 16:04:07,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2024-10-24 16:04:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2024-10-24 16:04:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-10-24 16:04:07,940 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:07,940 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:07,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-24 16:04:07,941 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:04:07,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:07,943 INFO L85 PathProgramCache]: Analyzing trace with hash 410844167, now seen corresponding path program 1 times [2024-10-24 16:04:07,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:07,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374802454] [2024-10-24 16:04:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:07,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3848 trivial. 0 not checked. [2024-10-24 16:04:08,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:08,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374802454] [2024-10-24 16:04:08,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374802454] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:08,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:08,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:04:08,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389463725] [2024-10-24 16:04:08,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:08,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:04:08,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:08,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:04:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:08,157 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2024-10-24 16:04:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:08,174 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2024-10-24 16:04:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:04:08,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2024-10-24 16:04:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:08,175 INFO L225 Difference]: With dead ends: 160 [2024-10-24 16:04:08,176 INFO L226 Difference]: Without dead ends: 160 [2024-10-24 16:04:08,176 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 [2024-10-24 16:04:08,176 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:08,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-24 16:04:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-10-24 16:04:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2024-10-24 16:04:08,181 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 143 [2024-10-24 16:04:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:08,182 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2024-10-24 16:04:08,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2024-10-24 16:04:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2024-10-24 16:04:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-10-24 16:04:08,183 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:08,183 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:08,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-24 16:04:08,183 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:04:08,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash -951061960, now seen corresponding path program 1 times [2024-10-24 16:04:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:08,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077890469] [2024-10-24 16:04:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:08,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:04:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077890469] [2024-10-24 16:04:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077890469] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247070412] [2024-10-24 16:04:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:11,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:11,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:11,096 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:11,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 16:04:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:11,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-24 16:04:11,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:04:11,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:04:15,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247070412] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:15,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:15,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 128 [2024-10-24 16:04:15,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175496396] [2024-10-24 16:04:15,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:15,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-10-24 16:04:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-10-24 16:04:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2024-10-24 16:04:15,669 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 129 states, 129 states have (on average 2.108527131782946) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:16,019 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2024-10-24 16:04:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-10-24 16:04:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.108527131782946) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 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 146 [2024-10-24 16:04:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:16,021 INFO L225 Difference]: With dead ends: 288 [2024-10-24 16:04:16,021 INFO L226 Difference]: Without dead ends: 288 [2024-10-24 16:04:16,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2024-10-24 16:04:16,022 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:16,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:04:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-10-24 16:04:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2024-10-24 16:04:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 286 states have (on average 1.013986013986014) internal successors, (290), 287 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 290 transitions. [2024-10-24 16:04:16,027 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 290 transitions. Word has length 146 [2024-10-24 16:04:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:16,027 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 290 transitions. [2024-10-24 16:04:16,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.108527131782946) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 290 transitions. [2024-10-24 16:04:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2024-10-24 16:04:16,030 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:16,030 INFO L215 NwaCegarLoop]: trace histogram [126, 126, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:16,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:16,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-24 16:04:16,231 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:04:16,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash -544401224, now seen corresponding path program 2 times [2024-10-24 16:04:16,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:16,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54428386] [2024-10-24 16:04:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:16,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15882 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:04:25,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:25,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54428386] [2024-10-24 16:04:25,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54428386] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:25,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293549434] [2024-10-24 16:04:25,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:04:25,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:25,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:25,886 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:25,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 16:04:26,259 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:04:26,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:26,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-10-24 16:04:26,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15882 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:04:26,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15882 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:04:42,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293549434] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:42,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:42,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 256 [2024-10-24 16:04:42,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871272887] [2024-10-24 16:04:42,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:42,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2024-10-24 16:04:42,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2024-10-24 16:04:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2024-10-24 16:04:42,567 INFO L87 Difference]: Start difference. First operand 288 states and 290 transitions. Second operand has 257 states, 257 states have (on average 2.054474708171206) internal successors, (528), 256 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:43,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:43,527 INFO L93 Difference]: Finished difference Result 544 states and 546 transitions. [2024-10-24 16:04:43,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2024-10-24 16:04:43,527 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 2.054474708171206) internal successors, (528), 256 states have internal predecessors, (528), 0 states have call successors, (0), 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 274 [2024-10-24 16:04:43,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:43,529 INFO L225 Difference]: With dead ends: 544 [2024-10-24 16:04:43,529 INFO L226 Difference]: Without dead ends: 544 [2024-10-24 16:04:43,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2024-10-24 16:04:43,534 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:43,534 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 16:04:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2024-10-24 16:04:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2024-10-24 16:04:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 542 states have (on average 1.007380073800738) internal successors, (546), 543 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 546 transitions. [2024-10-24 16:04:43,541 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 546 transitions. Word has length 274 [2024-10-24 16:04:43,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:43,542 INFO L471 AbstractCegarLoop]: Abstraction has 544 states and 546 transitions. [2024-10-24 16:04:43,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 2.054474708171206) internal successors, (528), 256 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 546 transitions. [2024-10-24 16:04:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2024-10-24 16:04:43,549 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:43,550 INFO L215 NwaCegarLoop]: trace histogram [254, 254, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:43,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:43,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-24 16:04:43,750 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-24 16:04:43,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:43,751 INFO L85 PathProgramCache]: Analyzing trace with hash -984652360, now seen corresponding path program 3 times [2024-10-24 16:04:43,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:43,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790382643] [2024-10-24 16:04:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:43,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat