./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/dll.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 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/memsafety-broom/dll.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 10681342956536030b52ca48e31ce31e2b55c374e7faf58302ff5a4410bd4b13 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 18:05:16,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 18:05:16,811 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-10-14 18:05:16,814 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 18:05:16,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 18:05:16,841 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 18:05:16,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 18:05:16,842 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 18:05:16,842 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 18:05:16,843 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 18:05:16,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 18:05:16,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 18:05:16,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 18:05:16,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 18:05:16,847 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 18:05:16,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 18:05:16,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 18:05:16,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 18:05:16,848 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 18:05:16,848 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 18:05:16,848 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 18:05:16,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 18:05:16,849 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 18:05:16,849 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 18:05:16,849 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 18:05:16,849 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 18:05:16,849 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 18:05:16,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 18:05:16,850 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 18:05:16,850 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 18:05:16,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 18:05:16,850 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 18:05:16,850 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 18:05:16,850 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 18:05:16,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 18:05:16,851 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 18:05:16,851 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 18:05:16,851 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 18:05:16,851 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 18:05:16,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10681342956536030b52ca48e31ce31e2b55c374e7faf58302ff5a4410bd4b13 [2024-10-14 18:05:17,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 18:05:17,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 18:05:17,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 18:05:17,128 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 18:05:17,128 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 18:05:17,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/dll.i [2024-10-14 18:05:18,535 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 18:05:19,051 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 18:05:19,053 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/dll.i [2024-10-14 18:05:19,109 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44d0dd7c6/a83034d6da7b43ae944e4071c79d0530/FLAG79cf83355 [2024-10-14 18:05:19,140 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44d0dd7c6/a83034d6da7b43ae944e4071c79d0530 [2024-10-14 18:05:19,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 18:05:19,145 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 18:05:19,148 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 18:05:19,148 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 18:05:19,154 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 18:05:19,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742b62da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19, skipping insertion in model container [2024-10-14 18:05:19,156 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,208 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 18:05:19,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 18:05:19,502 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 18:05:19,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 18:05:19,591 INFO L204 MainTranslator]: Completed translation [2024-10-14 18:05:19,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19 WrapperNode [2024-10-14 18:05:19,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 18:05:19,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 18:05:19,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 18:05:19,593 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 18:05:19,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,638 INFO L138 Inliner]: procedures = 118, calls = 17, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 57 [2024-10-14 18:05:19,639 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 18:05:19,639 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 18:05:19,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 18:05:19,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 18:05:19,660 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,663 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,681 INFO L175 MemorySlicer]: Split 8 memory accesses to 1 slices as follows [8]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 4 writes are split as follows [4]. [2024-10-14 18:05:19,682 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,687 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,691 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,692 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,693 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,695 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 18:05:19,696 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 18:05:19,696 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 18:05:19,697 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 18:05:19,697 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (1/1) ... [2024-10-14 18:05:19,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 18:05:19,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:19,731 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) [2024-10-14 18:05:19,735 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 [2024-10-14 18:05:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-10-14 18:05:19,790 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-10-14 18:05:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 18:05:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-14 18:05:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-14 18:05:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 18:05:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 18:05:19,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 18:05:19,920 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 18:05:19,926 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 18:05:20,110 INFO L? ?]: Removed 58 outVars from TransFormulas that were not future-live. [2024-10-14 18:05:20,110 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 18:05:20,156 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 18:05:20,156 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 18:05:20,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:20 BoogieIcfgContainer [2024-10-14 18:05:20,157 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 18:05:20,163 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 18:05:20,163 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 18:05:20,166 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 18:05:20,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:05:19" (1/3) ... [2024-10-14 18:05:20,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b406246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:05:20, skipping insertion in model container [2024-10-14 18:05:20,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:05:19" (2/3) ... [2024-10-14 18:05:20,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b406246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:05:20, skipping insertion in model container [2024-10-14 18:05:20,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:05:20" (3/3) ... [2024-10-14 18:05:20,169 INFO L112 eAbstractionObserver]: Analyzing ICFG dll.i [2024-10-14 18:05:20,189 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 18:05:20,190 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-10-14 18:05:20,237 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 18:05:20,243 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;@54480a92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 18:05:20,244 INFO L334 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2024-10-14 18:05:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 42 states have internal predecessors, (48), 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) [2024-10-14 18:05:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-14 18:05:20,255 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:20,255 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-14 18:05:20,258 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:20,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:20,263 INFO L85 PathProgramCache]: Analyzing trace with hash 3959322, now seen corresponding path program 1 times [2024-10-14 18:05:20,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:20,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019369489] [2024-10-14 18:05:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:20,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:20,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:20,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019369489] [2024-10-14 18:05:20,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019369489] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:20,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:20,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 18:05:20,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446344654] [2024-10-14 18:05:20,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:20,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 18:05:20,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 18:05:20,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:05:20,563 INFO L87 Difference]: Start difference. First operand has 46 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 42 states have internal predecessors, (48), 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 18:05:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:20,700 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2024-10-14 18:05:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 18:05:20,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-14 18:05:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:20,709 INFO L225 Difference]: With dead ends: 44 [2024-10-14 18:05:20,710 INFO L226 Difference]: Without dead ends: 43 [2024-10-14 18:05:20,712 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 [2024-10-14 18:05:20,714 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:20,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 59 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-14 18:05:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-14 18:05:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 39 states have internal predecessors, (42), 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) [2024-10-14 18:05:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2024-10-14 18:05:20,741 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 4 [2024-10-14 18:05:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:20,742 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2024-10-14 18:05:20,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 18:05:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2024-10-14 18:05:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-14 18:05:20,742 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:20,743 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-14 18:05:20,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 18:05:20,743 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:20,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash 3959323, now seen corresponding path program 1 times [2024-10-14 18:05:20,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:20,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017118670] [2024-10-14 18:05:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:20,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:20,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:20,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017118670] [2024-10-14 18:05:20,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017118670] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:20,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:20,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 18:05:20,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515264329] [2024-10-14 18:05:20,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:20,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 18:05:20,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:20,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 18:05:20,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:05:20,823 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 18:05:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:20,860 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2024-10-14 18:05:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 18:05:20,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-14 18:05:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:20,862 INFO L225 Difference]: With dead ends: 41 [2024-10-14 18:05:20,862 INFO L226 Difference]: Without dead ends: 41 [2024-10-14 18:05:20,863 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 [2024-10-14 18:05:20,865 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:20,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 18:05:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-14 18:05:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-14 18:05:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 37 states have internal predecessors, (40), 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) [2024-10-14 18:05:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-10-14 18:05:20,873 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 4 [2024-10-14 18:05:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:20,873 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-10-14 18:05:20,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 18:05:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-10-14 18:05:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-14 18:05:20,876 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:20,876 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:20,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 18:05:20,876 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:20,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1182767623, now seen corresponding path program 1 times [2024-10-14 18:05:20,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:20,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571443489] [2024-10-14 18:05:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:20,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:21,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:21,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:21,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571443489] [2024-10-14 18:05:21,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571443489] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:21,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:21,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 18:05:21,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141598560] [2024-10-14 18:05:21,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:21,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 18:05:21,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:21,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 18:05:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:05:21,175 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:21,315 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2024-10-14 18:05:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:05:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-14 18:05:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:21,318 INFO L225 Difference]: With dead ends: 47 [2024-10-14 18:05:21,318 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 18:05:21,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:05:21,320 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:21,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 125 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 18:05:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-14 18:05:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 42 states have internal predecessors, (48), 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) [2024-10-14 18:05:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-10-14 18:05:21,330 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 12 [2024-10-14 18:05:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:21,331 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-10-14 18:05:21,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-10-14 18:05:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-14 18:05:21,333 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:21,333 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:21,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 18:05:21,334 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:21,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1182767624, now seen corresponding path program 1 times [2024-10-14 18:05:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:21,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418825613] [2024-10-14 18:05:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:21,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:21,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:21,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418825613] [2024-10-14 18:05:21,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418825613] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:21,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:21,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 18:05:21,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354785328] [2024-10-14 18:05:21,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:21,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 18:05:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:21,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 18:05:21,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:05:21,623 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:21,714 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2024-10-14 18:05:21,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:05:21,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-14 18:05:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:21,715 INFO L225 Difference]: With dead ends: 47 [2024-10-14 18:05:21,715 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 18:05:21,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:05:21,716 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:21,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 145 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 18:05:21,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-14 18:05:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 42 states have internal predecessors, (47), 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) [2024-10-14 18:05:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2024-10-14 18:05:21,720 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 12 [2024-10-14 18:05:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:21,720 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2024-10-14 18:05:21,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2024-10-14 18:05:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 18:05:21,721 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:21,721 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:21,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 18:05:21,722 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:21,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:21,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1526699279, now seen corresponding path program 1 times [2024-10-14 18:05:21,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:21,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569150572] [2024-10-14 18:05:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:21,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:21,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:21,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:21,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569150572] [2024-10-14 18:05:21,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569150572] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:21,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:21,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 18:05:21,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039796802] [2024-10-14 18:05:21,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:21,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 18:05:21,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:21,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 18:05:21,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:05:21,848 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:21,926 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2024-10-14 18:05:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:05:21,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-10-14 18:05:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:21,927 INFO L225 Difference]: With dead ends: 48 [2024-10-14 18:05:21,927 INFO L226 Difference]: Without dead ends: 48 [2024-10-14 18:05:21,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:05:21,928 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:21,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 188 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-14 18:05:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2024-10-14 18:05:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 43 states have internal predecessors, (47), 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) [2024-10-14 18:05:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2024-10-14 18:05:21,936 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 14 [2024-10-14 18:05:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:21,936 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2024-10-14 18:05:21,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2024-10-14 18:05:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 18:05:21,937 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:21,937 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:21,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 18:05:21,937 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:21,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:21,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1526606606, now seen corresponding path program 1 times [2024-10-14 18:05:21,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:21,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874803991] [2024-10-14 18:05:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:21,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:22,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:22,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:22,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874803991] [2024-10-14 18:05:22,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874803991] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:22,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591614135] [2024-10-14 18:05:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:22,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:22,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:22,169 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) [2024-10-14 18:05:22,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 18:05:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:22,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 18:05:22,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:22,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:05:22,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:05:22,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-14 18:05:22,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-14 18:05:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:22,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:22,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-14 18:05:22,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-14 18:05:22,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-14 18:05:22,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:05:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:22,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591614135] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:05:22,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:05:22,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-10-14 18:05:22,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642692605] [2024-10-14 18:05:22,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:22,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 18:05:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 18:05:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2024-10-14 18:05:22,902 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 18:05:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:23,119 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2024-10-14 18:05:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:05:23,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 14 [2024-10-14 18:05:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:23,120 INFO L225 Difference]: With dead ends: 49 [2024-10-14 18:05:23,120 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 18:05:23,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2024-10-14 18:05:23,121 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:23,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 395 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 18:05:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-10-14 18:05:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 44 states have internal predecessors, (48), 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) [2024-10-14 18:05:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-10-14 18:05:23,125 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 14 [2024-10-14 18:05:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:23,125 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-10-14 18:05:23,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 18:05:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-10-14 18:05:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 18:05:23,126 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:23,126 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:23,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 18:05:23,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 18:05:23,331 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:23,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:23,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1527636732, now seen corresponding path program 1 times [2024-10-14 18:05:23,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:23,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076817778] [2024-10-14 18:05:23,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:23,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:23,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:23,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:23,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:23,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076817778] [2024-10-14 18:05:23,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076817778] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:23,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124892325] [2024-10-14 18:05:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:23,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:23,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:23,506 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) [2024-10-14 18:05:23,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 18:05:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:23,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 18:05:23,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:23,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:05:23,596 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2024-10-14 18:05:23,624 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-14 18:05:23,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-10-14 18:05:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-10-14 18:05:23,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:23,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124892325] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:23,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:05:23,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2024-10-14 18:05:23,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561885763] [2024-10-14 18:05:23,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:23,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 18:05:23,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:23,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 18:05:23,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2024-10-14 18:05:23,666 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:05:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:23,794 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2024-10-14 18:05:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:05:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2024-10-14 18:05:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:23,795 INFO L225 Difference]: With dead ends: 48 [2024-10-14 18:05:23,795 INFO L226 Difference]: Without dead ends: 48 [2024-10-14 18:05:23,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=124, Unknown=1, NotChecked=22, Total=182 [2024-10-14 18:05:23,796 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:23,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 124 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 159 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2024-10-14 18:05:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-14 18:05:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-14 18:05:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.6) internal successors, (48), 43 states have internal predecessors, (48), 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) [2024-10-14 18:05:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2024-10-14 18:05:23,799 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 15 [2024-10-14 18:05:23,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:23,800 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2024-10-14 18:05:23,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:05:23,800 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2024-10-14 18:05:23,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 18:05:23,800 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:23,801 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:23,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 18:05:24,004 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,SelfDestructingSolverStorable6 [2024-10-14 18:05:24,005 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:24,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:24,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1527636733, now seen corresponding path program 1 times [2024-10-14 18:05:24,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:24,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268991412] [2024-10-14 18:05:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:24,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:24,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:24,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:24,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:24,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268991412] [2024-10-14 18:05:24,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268991412] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:24,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092009360] [2024-10-14 18:05:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:24,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:24,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:24,259 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) [2024-10-14 18:05:24,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 18:05:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:24,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-14 18:05:24,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:24,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:05:24,338 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 [2024-10-14 18:05:24,399 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-10-14 18:05:24,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:05:24,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-14 18:05:24,421 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:05:24,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:05:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-10-14 18:05:24,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:24,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092009360] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:24,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:05:24,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2024-10-14 18:05:24,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770531565] [2024-10-14 18:05:24,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:24,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 18:05:24,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:24,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 18:05:24,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2024-10-14 18:05:24,497 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:05:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:24,641 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2024-10-14 18:05:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:05:24,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2024-10-14 18:05:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:24,642 INFO L225 Difference]: With dead ends: 53 [2024-10-14 18:05:24,642 INFO L226 Difference]: Without dead ends: 53 [2024-10-14 18:05:24,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=224, Unknown=1, NotChecked=30, Total=306 [2024-10-14 18:05:24,643 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:24,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 135 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2024-10-14 18:05:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-14 18:05:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-10-14 18:05:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 46 states have internal predecessors, (52), 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) [2024-10-14 18:05:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-10-14 18:05:24,646 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 15 [2024-10-14 18:05:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:24,647 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-10-14 18:05:24,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:05:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-10-14 18:05:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-14 18:05:24,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:24,647 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:24,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 18:05:24,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:24,852 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:24,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:24,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1809815324, now seen corresponding path program 1 times [2024-10-14 18:05:24,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:24,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184899359] [2024-10-14 18:05:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:24,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:24,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:24,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:24,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184899359] [2024-10-14 18:05:24,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184899359] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:24,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:24,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 18:05:24,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413785168] [2024-10-14 18:05:24,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:24,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 18:05:24,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 18:05:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:05:24,936 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:25,059 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-10-14 18:05:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 18:05:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-10-14 18:05:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:25,060 INFO L225 Difference]: With dead ends: 53 [2024-10-14 18:05:25,060 INFO L226 Difference]: Without dead ends: 53 [2024-10-14 18:05:25,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:05:25,060 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:25,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 112 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-14 18:05:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-14 18:05:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 48 states have internal predecessors, (56), 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) [2024-10-14 18:05:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-10-14 18:05:25,066 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 16 [2024-10-14 18:05:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:25,066 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-10-14 18:05:25,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-10-14 18:05:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-14 18:05:25,067 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:25,067 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:25,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 18:05:25,067 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:25,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:25,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1809815325, now seen corresponding path program 1 times [2024-10-14 18:05:25,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:25,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663998948] [2024-10-14 18:05:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:25,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:25,185 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:25,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663998948] [2024-10-14 18:05:25,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663998948] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:25,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:25,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 18:05:25,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035260650] [2024-10-14 18:05:25,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:25,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 18:05:25,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:25,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 18:05:25,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:05:25,251 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:25,352 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2024-10-14 18:05:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 18:05:25,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-10-14 18:05:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:25,353 INFO L225 Difference]: With dead ends: 54 [2024-10-14 18:05:25,353 INFO L226 Difference]: Without dead ends: 54 [2024-10-14 18:05:25,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:05:25,354 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:25,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 125 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-14 18:05:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-14 18:05:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 49 states have internal predecessors, (56), 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) [2024-10-14 18:05:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-10-14 18:05:25,360 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 16 [2024-10-14 18:05:25,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:25,361 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-10-14 18:05:25,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-10-14 18:05:25,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 18:05:25,362 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:25,362 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:25,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 18:05:25,363 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:25,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:25,363 INFO L85 PathProgramCache]: Analyzing trace with hash -819841812, now seen corresponding path program 1 times [2024-10-14 18:05:25,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:25,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377997623] [2024-10-14 18:05:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:25,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:25,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:25,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 18:05:25,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:25,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377997623] [2024-10-14 18:05:25,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377997623] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:25,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:25,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 18:05:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470006164] [2024-10-14 18:05:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:25,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 18:05:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 18:05:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:05:25,467 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:05:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:25,550 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2024-10-14 18:05:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:05:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-10-14 18:05:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:25,551 INFO L225 Difference]: With dead ends: 53 [2024-10-14 18:05:25,551 INFO L226 Difference]: Without dead ends: 53 [2024-10-14 18:05:25,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:05:25,552 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:25,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 131 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-14 18:05:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-14 18:05:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 48 states have internal predecessors, (54), 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) [2024-10-14 18:05:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-10-14 18:05:25,557 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2024-10-14 18:05:25,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:25,557 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-10-14 18:05:25,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:05:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-10-14 18:05:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 18:05:25,559 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:25,559 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:25,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-14 18:05:25,559 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:25,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:25,560 INFO L85 PathProgramCache]: Analyzing trace with hash -819841811, now seen corresponding path program 1 times [2024-10-14 18:05:25,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:25,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857852259] [2024-10-14 18:05:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:25,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:25,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:25,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:25,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:25,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857852259] [2024-10-14 18:05:25,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857852259] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:25,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:25,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 18:05:25,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698694557] [2024-10-14 18:05:25,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:25,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 18:05:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 18:05:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:05:25,756 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:05:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:25,829 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2024-10-14 18:05:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:05:25,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-10-14 18:05:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:25,830 INFO L225 Difference]: With dead ends: 52 [2024-10-14 18:05:25,830 INFO L226 Difference]: Without dead ends: 52 [2024-10-14 18:05:25,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:05:25,831 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:25,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:25,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-14 18:05:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-10-14 18:05:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 47 states have internal predecessors, (52), 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) [2024-10-14 18:05:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2024-10-14 18:05:25,834 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 17 [2024-10-14 18:05:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:25,834 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2024-10-14 18:05:25,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:05:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2024-10-14 18:05:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 18:05:25,834 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:25,835 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:25,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-14 18:05:25,835 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:25,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:25,835 INFO L85 PathProgramCache]: Analyzing trace with hash 269698733, now seen corresponding path program 1 times [2024-10-14 18:05:25,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:25,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210233747] [2024-10-14 18:05:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:25,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:25,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:25,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:25,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210233747] [2024-10-14 18:05:25,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210233747] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:25,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:25,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 18:05:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509894962] [2024-10-14 18:05:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:25,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 18:05:25,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:25,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 18:05:25,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:05:25,912 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:25,985 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2024-10-14 18:05:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 18:05:25,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-10-14 18:05:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:25,986 INFO L225 Difference]: With dead ends: 58 [2024-10-14 18:05:25,986 INFO L226 Difference]: Without dead ends: 58 [2024-10-14 18:05:25,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:05:25,986 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:25,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 161 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:25,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-14 18:05:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-10-14 18:05:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.368421052631579) internal successors, (52), 48 states have internal predecessors, (52), 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) [2024-10-14 18:05:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2024-10-14 18:05:25,989 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 17 [2024-10-14 18:05:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:25,989 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2024-10-14 18:05:25,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2024-10-14 18:05:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 18:05:25,990 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:25,990 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:25,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-14 18:05:25,990 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:25,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:25,991 INFO L85 PathProgramCache]: Analyzing trace with hash -229199143, now seen corresponding path program 1 times [2024-10-14 18:05:25,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:25,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819259547] [2024-10-14 18:05:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:25,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:26,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:26,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:26,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819259547] [2024-10-14 18:05:26,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819259547] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:05:26,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:05:26,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 18:05:26,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428041507] [2024-10-14 18:05:26,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:05:26,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 18:05:26,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:26,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 18:05:26,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:05:26,082 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:26,165 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2024-10-14 18:05:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 18:05:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-10-14 18:05:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:26,166 INFO L225 Difference]: With dead ends: 57 [2024-10-14 18:05:26,167 INFO L226 Difference]: Without dead ends: 57 [2024-10-14 18:05:26,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:05:26,167 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:26,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 145 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-14 18:05:26,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-10-14 18:05:26,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 51 states have internal predecessors, (58), 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) [2024-10-14 18:05:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2024-10-14 18:05:26,170 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 18 [2024-10-14 18:05:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:26,171 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2024-10-14 18:05:26,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2024-10-14 18:05:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 18:05:26,171 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:26,171 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:26,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-14 18:05:26,171 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:26,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash 926441433, now seen corresponding path program 1 times [2024-10-14 18:05:26,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:26,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689444458] [2024-10-14 18:05:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:26,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:26,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:26,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689444458] [2024-10-14 18:05:26,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689444458] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:26,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288050175] [2024-10-14 18:05:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:26,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:26,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:26,409 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) [2024-10-14 18:05:26,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 18:05:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:26,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-14 18:05:26,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:26,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:05:26,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:05:26,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-14 18:05:26,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-14 18:05:26,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:05:26,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-14 18:05:26,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:05:26,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-14 18:05:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:26,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:26,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-14 18:05:26,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2024-10-14 18:05:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:26,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288050175] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:05:26,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:05:26,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2024-10-14 18:05:26,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547420829] [2024-10-14 18:05:26,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:26,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 18:05:26,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 18:05:26,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2024-10-14 18:05:26,845 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:05:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:27,164 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-10-14 18:05:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 18:05:27,164 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-10-14 18:05:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:27,165 INFO L225 Difference]: With dead ends: 59 [2024-10-14 18:05:27,165 INFO L226 Difference]: Without dead ends: 59 [2024-10-14 18:05:27,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2024-10-14 18:05:27,166 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:27,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 282 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:05:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-14 18:05:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-14 18:05:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 54 states have internal predecessors, (61), 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) [2024-10-14 18:05:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2024-10-14 18:05:27,168 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 21 [2024-10-14 18:05:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:27,168 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2024-10-14 18:05:27,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:05:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2024-10-14 18:05:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-14 18:05:27,169 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:27,169 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:27,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 18:05:27,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 18:05:27,374 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:27,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:27,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1345088112, now seen corresponding path program 1 times [2024-10-14 18:05:27,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:27,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951638798] [2024-10-14 18:05:27,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:27,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:27,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:27,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:27,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951638798] [2024-10-14 18:05:27,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951638798] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:27,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411610169] [2024-10-14 18:05:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:27,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:27,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:27,487 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) [2024-10-14 18:05:27,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 18:05:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:27,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 18:05:27,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:27,611 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 13 treesize of output 9 [2024-10-14 18:05:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:27,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:27,675 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_24| Int)) (or (= (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_24| 0) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_24|) 0)))) is different from false [2024-10-14 18:05:27,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411610169] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:27,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:05:27,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2024-10-14 18:05:27,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295126635] [2024-10-14 18:05:27,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:27,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 18:05:27,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:27,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 18:05:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=110, Unknown=1, NotChecked=20, Total=156 [2024-10-14 18:05:27,677 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:27,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:27,775 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-10-14 18:05:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:05:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-10-14 18:05:27,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:27,776 INFO L225 Difference]: With dead ends: 61 [2024-10-14 18:05:27,776 INFO L226 Difference]: Without dead ends: 48 [2024-10-14 18:05:27,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=110, Unknown=1, NotChecked=20, Total=156 [2024-10-14 18:05:27,777 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:27,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 138 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-14 18:05:27,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-14 18:05:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 43 states have internal predecessors, (49), 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) [2024-10-14 18:05:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-10-14 18:05:27,779 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 22 [2024-10-14 18:05:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:27,779 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-10-14 18:05:27,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:05:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-10-14 18:05:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 18:05:27,780 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:27,780 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:27,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 18:05:27,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 18:05:27,981 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:27,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash 354522767, now seen corresponding path program 1 times [2024-10-14 18:05:27,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:27,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754872165] [2024-10-14 18:05:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:27,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:28,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:28,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 18:05:28,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:28,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754872165] [2024-10-14 18:05:28,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754872165] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:28,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962480922] [2024-10-14 18:05:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:28,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:28,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:28,094 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) [2024-10-14 18:05:28,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 18:05:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:28,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 18:05:28,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 18:05:28,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:28,198 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 18:05:28,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2024-10-14 18:05:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 18:05:28,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962480922] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:05:28,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:05:28,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 6 [2024-10-14 18:05:28,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506732552] [2024-10-14 18:05:28,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:28,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 18:05:28,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:28,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 18:05:28,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:05:28,211 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:05:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:28,265 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-10-14 18:05:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:05:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-10-14 18:05:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:28,266 INFO L225 Difference]: With dead ends: 54 [2024-10-14 18:05:28,266 INFO L226 Difference]: Without dead ends: 54 [2024-10-14 18:05:28,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:05:28,267 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:28,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 112 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-14 18:05:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-10-14 18:05:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 48 states have internal predecessors, (56), 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) [2024-10-14 18:05:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-10-14 18:05:28,271 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 23 [2024-10-14 18:05:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:28,272 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-10-14 18:05:28,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:05:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-10-14 18:05:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 18:05:28,273 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:28,273 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:28,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 18:05:28,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 18:05:28,475 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:28,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash 354522768, now seen corresponding path program 1 times [2024-10-14 18:05:28,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:28,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251975983] [2024-10-14 18:05:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:28,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:28,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:28,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:28,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:28,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251975983] [2024-10-14 18:05:28,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251975983] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:28,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295005862] [2024-10-14 18:05:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:28,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:28,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:28,616 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) [2024-10-14 18:05:28,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 18:05:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:28,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 18:05:28,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 18:05:28,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:28,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:05:28,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2024-10-14 18:05:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 18:05:28,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295005862] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:05:28,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:05:28,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2024-10-14 18:05:28,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694539381] [2024-10-14 18:05:28,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:28,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 18:05:28,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:28,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 18:05:28,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-10-14 18:05:28,851 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 14 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-14 18:05:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:28,929 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-10-14 18:05:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:05:28,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 23 [2024-10-14 18:05:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:28,930 INFO L225 Difference]: With dead ends: 54 [2024-10-14 18:05:28,930 INFO L226 Difference]: Without dead ends: 54 [2024-10-14 18:05:28,931 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-10-14 18:05:28,931 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:28,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 219 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:05:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-14 18:05:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-10-14 18:05:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 48 states have internal predecessors, (55), 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) [2024-10-14 18:05:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2024-10-14 18:05:28,933 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 23 [2024-10-14 18:05:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:28,934 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2024-10-14 18:05:28,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-14 18:05:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2024-10-14 18:05:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 18:05:28,934 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:28,934 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:28,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 18:05:29,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:29,139 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:29,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:29,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1394003834, now seen corresponding path program 1 times [2024-10-14 18:05:29,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:29,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410402052] [2024-10-14 18:05:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:29,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:29,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:29,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:29,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:29,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410402052] [2024-10-14 18:05:29,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410402052] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:29,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565813047] [2024-10-14 18:05:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:29,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:29,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:29,439 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) [2024-10-14 18:05:29,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 18:05:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:29,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 18:05:29,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:29,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:05:29,682 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-14 18:05:29,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-10-14 18:05:29,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 18:05:29,820 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:05:29,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-10-14 18:05:29,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:05:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:29,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:30,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:05:30,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2024-10-14 18:05:30,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:05:30,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2024-10-14 18:05:30,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-14 18:05:30,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565813047] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:30,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:05:30,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2024-10-14 18:05:30,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769207920] [2024-10-14 18:05:30,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:30,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 18:05:30,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 18:05:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1135, Unknown=3, NotChecked=0, Total=1260 [2024-10-14 18:05:30,270 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 30 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 18:05:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:30,518 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2024-10-14 18:05:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 18:05:30,519 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-10-14 18:05:30,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:30,519 INFO L225 Difference]: With dead ends: 56 [2024-10-14 18:05:30,519 INFO L226 Difference]: Without dead ends: 56 [2024-10-14 18:05:30,520 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=1329, Unknown=3, NotChecked=0, Total=1482 [2024-10-14 18:05:30,520 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:30,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 316 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:05:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-14 18:05:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-10-14 18:05:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 50 states have internal predecessors, (59), 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) [2024-10-14 18:05:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-10-14 18:05:30,522 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 25 [2024-10-14 18:05:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:30,523 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-10-14 18:05:30,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 18:05:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-10-14 18:05:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 18:05:30,523 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:30,523 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:30,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 18:05:30,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:30,728 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:30,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:30,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1394003835, now seen corresponding path program 1 times [2024-10-14 18:05:30,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:30,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248608826] [2024-10-14 18:05:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:30,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:31,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:31,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:31,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:31,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248608826] [2024-10-14 18:05:31,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248608826] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:31,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145405187] [2024-10-14 18:05:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:31,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:31,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:31,136 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) [2024-10-14 18:05:31,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 18:05:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:31,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-14 18:05:31,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:31,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:05:31,370 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:05:31,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:05:31,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:05:31,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 18:05:31,485 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:05:31,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-10-14 18:05:31,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 18:05:31,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:05:31,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 18:05:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:31,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:31,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:05:31,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2024-10-14 18:05:31,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:05:31,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-10-14 18:05:31,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:05:31,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2024-10-14 18:05:31,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 18:05:31,887 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:05:31,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2024-10-14 18:05:31,892 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:05:31,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2024-10-14 18:05:31,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145405187] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:31,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:05:31,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2024-10-14 18:05:31,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663244613] [2024-10-14 18:05:31,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:31,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-14 18:05:31,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:31,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-14 18:05:31,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1027, Unknown=2, NotChecked=0, Total=1122 [2024-10-14 18:05:31,994 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 27 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 18:05:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:32,299 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-10-14 18:05:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 18:05:32,300 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-10-14 18:05:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:32,301 INFO L225 Difference]: With dead ends: 56 [2024-10-14 18:05:32,301 INFO L226 Difference]: Without dead ends: 56 [2024-10-14 18:05:32,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=1343, Unknown=2, NotChecked=0, Total=1482 [2024-10-14 18:05:32,302 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:32,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 369 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:05:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-14 18:05:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-10-14 18:05:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.45) internal successors, (58), 50 states have internal predecessors, (58), 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) [2024-10-14 18:05:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-10-14 18:05:32,304 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 25 [2024-10-14 18:05:32,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:32,304 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-10-14 18:05:32,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 18:05:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-10-14 18:05:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 18:05:32,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:32,316 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:32,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 18:05:32,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:32,517 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:32,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:32,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1872247156, now seen corresponding path program 1 times [2024-10-14 18:05:32,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:32,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021576540] [2024-10-14 18:05:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:32,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:32,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:32,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:32,905 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:05:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 18:05:32,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:32,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021576540] [2024-10-14 18:05:32,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021576540] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:32,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52287076] [2024-10-14 18:05:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:32,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:32,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:32,961 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) [2024-10-14 18:05:32,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 18:05:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:33,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-14 18:05:33,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:33,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:05:33,118 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:05:33,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:05:33,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 18:05:33,174 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:05:33,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-10-14 18:05:33,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:05:33,187 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base 1))) is different from true [2024-10-14 18:05:33,197 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-14 18:05:33,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-14 18:05:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 6 not checked. [2024-10-14 18:05:33,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:33,291 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2024-10-14 18:05:33,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-10-14 18:05:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:33,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52287076] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:05:33,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:05:33,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 28 [2024-10-14 18:05:33,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308401042] [2024-10-14 18:05:33,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:33,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-14 18:05:33,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:33,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-14 18:05:33,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=667, Unknown=9, NotChecked=52, Total=812 [2024-10-14 18:05:33,420 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 29 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-14 18:05:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:33,627 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-10-14 18:05:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:05:33,627 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 26 [2024-10-14 18:05:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:33,628 INFO L225 Difference]: With dead ends: 54 [2024-10-14 18:05:33,628 INFO L226 Difference]: Without dead ends: 54 [2024-10-14 18:05:33,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=924, Unknown=9, NotChecked=62, Total=1122 [2024-10-14 18:05:33,629 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:33,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 318 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 321 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2024-10-14 18:05:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-14 18:05:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-14 18:05:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.425) internal successors, (57), 49 states have internal predecessors, (57), 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) [2024-10-14 18:05:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-10-14 18:05:33,631 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 26 [2024-10-14 18:05:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:33,632 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-10-14 18:05:33,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-14 18:05:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-10-14 18:05:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 18:05:33,633 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:33,633 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:33,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-14 18:05:33,833 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,SelfDestructingSolverStorable20 [2024-10-14 18:05:33,834 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:33,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:33,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1872247157, now seen corresponding path program 1 times [2024-10-14 18:05:33,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:33,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559295594] [2024-10-14 18:05:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:33,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:34,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:34,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:34,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:05:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 18:05:34,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:34,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559295594] [2024-10-14 18:05:34,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559295594] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:34,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174322274] [2024-10-14 18:05:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:34,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:34,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:34,596 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) [2024-10-14 18:05:34,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 18:05:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:34,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-14 18:05:34,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:34,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:05:34,759 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 [2024-10-14 18:05:34,808 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:05:34,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:05:34,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 18:05:34,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:05:34,896 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:05:34,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2024-10-14 18:05:34,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 18:05:34,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2024-10-14 18:05:34,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 18:05:34,990 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-10-14 18:05:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:05:35,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-14 18:05:35,009 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:05:35,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:05:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-10-14 18:05:35,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:35,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174322274] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:35,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:05:35,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2024-10-14 18:05:35,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961260490] [2024-10-14 18:05:35,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:35,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 18:05:35,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 18:05:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=839, Unknown=1, NotChecked=58, Total=992 [2024-10-14 18:05:35,101 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 30 states, 25 states have (on average 1.48) internal successors, (37), 22 states have internal predecessors, (37), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 18:05:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:35,466 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2024-10-14 18:05:35,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 18:05:35,467 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.48) internal successors, (37), 22 states have internal predecessors, (37), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2024-10-14 18:05:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:35,468 INFO L225 Difference]: With dead ends: 51 [2024-10-14 18:05:35,468 INFO L226 Difference]: Without dead ends: 51 [2024-10-14 18:05:35,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1377, Unknown=1, NotChecked=76, Total=1640 [2024-10-14 18:05:35,469 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:35,469 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 331 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 387 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2024-10-14 18:05:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-14 18:05:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-10-14 18:05:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.35) internal successors, (54), 46 states have internal predecessors, (54), 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) [2024-10-14 18:05:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2024-10-14 18:05:35,471 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2024-10-14 18:05:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:35,471 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2024-10-14 18:05:35,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.48) internal successors, (37), 22 states have internal predecessors, (37), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 18:05:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2024-10-14 18:05:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 18:05:35,472 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:35,472 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:35,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-14 18:05:35,675 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,SelfDestructingSolverStorable21 [2024-10-14 18:05:35,675 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:35,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash -392163420, now seen corresponding path program 1 times [2024-10-14 18:05:35,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:35,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893928359] [2024-10-14 18:05:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:35,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:35,736 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:35,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 18:05:35,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:35,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893928359] [2024-10-14 18:05:35,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893928359] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:35,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474117999] [2024-10-14 18:05:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:35,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:35,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:35,748 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:05:35,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 18:05:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:35,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-14 18:05:35,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:35,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 18:05:35,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 18:05:35,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 18:05:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:05:36,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2024-10-14 18:05:36,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-10-14 18:05:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:36,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:36,102 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 18:05:36,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2024-10-14 18:05:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:05:36,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474117999] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:05:36,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:05:36,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 5] total 22 [2024-10-14 18:05:36,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115075961] [2024-10-14 18:05:36,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:05:36,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 18:05:36,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:05:36,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 18:05:36,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2024-10-14 18:05:36,152 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 22 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-14 18:05:36,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:05:36,444 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-10-14 18:05:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 18:05:36,444 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2024-10-14 18:05:36,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:05:36,445 INFO L225 Difference]: With dead ends: 62 [2024-10-14 18:05:36,445 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 18:05:36,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-10-14 18:05:36,445 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:05:36,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 317 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:05:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 18:05:36,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-10-14 18:05:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.425531914893617) internal successors, (67), 53 states have internal predecessors, (67), 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) [2024-10-14 18:05:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-10-14 18:05:36,448 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 27 [2024-10-14 18:05:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:05:36,448 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-10-14 18:05:36,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-14 18:05:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-10-14 18:05:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 18:05:36,449 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:05:36,449 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:05:36,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 18:05:36,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-14 18:05:36,653 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-10-14 18:05:36,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:05:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash -392070747, now seen corresponding path program 2 times [2024-10-14 18:05:36,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:05:36,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449875800] [2024-10-14 18:05:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:05:36,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:05:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:37,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:05:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:37,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:05:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:05:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:05:37,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:05:37,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449875800] [2024-10-14 18:05:37,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449875800] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:05:37,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823879484] [2024-10-14 18:05:37,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 18:05:37,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:05:37,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:05:37,208 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:05:37,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 18:05:37,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 18:05:37,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:05:37,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-10-14 18:05:37,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:05:37,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:05:37,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:05:37,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:05:37,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-14 18:05:37,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-14 18:05:37,393 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:05:37,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:05:37,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-10-14 18:05:37,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-10-14 18:05:37,472 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-10-14 18:05:37,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 50 [2024-10-14 18:05:37,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2024-10-14 18:05:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:05:37,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:05:38,783 INFO L349 Elim1Store]: treesize reduction 483, result has 42.8 percent of original size [2024-10-14 18:05:38,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 19 case distinctions, treesize of input 3001 treesize of output 1911 [2024-10-14 18:05:39,159 INFO L349 Elim1Store]: treesize reduction 192, result has 40.9 percent of original size [2024-10-14 18:05:39,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 2731 treesize of output 2255 [2024-10-14 18:05:39,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:05:39,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 2066 treesize of output 2126 [2024-10-14 18:05:39,961 INFO L349 Elim1Store]: treesize reduction 719, result has 41.6 percent of original size [2024-10-14 18:05:39,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 2733 treesize of output 2392 [2024-10-14 18:05:40,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:05:40,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2803 treesize of output 2918 [2024-10-14 18:05:41,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:52,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:52,284 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:05:52,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:52,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:52,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:52,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:52,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:53,116 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:05:53,163 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:05:53,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:53,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:53,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:53,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:05:53,911 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:05:53,963 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:06:44,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:06:45,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2024-10-14 18:06:46,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:06:49,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:06:49,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 142 [2024-10-14 18:06:50,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:06:50,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-14 18:06:51,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 104