./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/sll-shared-sll-before.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.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 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 16:29:17,882 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 16:29:17,946 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-10-24 16:29:17,951 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 16:29:17,951 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 16:29:17,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 16:29:17,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 16:29:17,991 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 16:29:17,992 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 16:29:17,996 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 16:29:17,996 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 16:29:17,996 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 16:29:17,997 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 16:29:17,997 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 16:29:17,997 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 16:29:17,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 16:29:17,998 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 16:29:17,998 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 16:29:17,998 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 16:29:17,998 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 16:29:17,999 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 16:29:18,001 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 16:29:18,002 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 16:29:18,002 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 16:29:18,002 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 16:29:18,002 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 16:29:18,003 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 16:29:18,003 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 16:29:18,003 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 16:29:18,003 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 16:29:18,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:29:18,004 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 16:29:18,004 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 16:29:18,004 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 16:29:18,004 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 16:29:18,004 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 16:29:18,004 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 16:29:18,005 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 16:29:18,005 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 16:29:18,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d [2024-10-24 16:29:18,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 16:29:18,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 16:29:18,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 16:29:18,315 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 16:29:18,316 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 16:29:18,317 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2024-10-24 16:29:19,687 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 16:29:20,015 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 16:29:20,016 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2024-10-24 16:29:20,034 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/078a7e6e3/d39c2569465943c19ceb22b0f8032b9e/FLAG24e6057eb [2024-10-24 16:29:20,050 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/078a7e6e3/d39c2569465943c19ceb22b0f8032b9e [2024-10-24 16:29:20,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 16:29:20,054 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 16:29:20,057 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 16:29:20,057 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 16:29:20,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 16:29:20,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e246d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20, skipping insertion in model container [2024-10-24 16:29:20,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,118 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 16:29:20,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:29:20,455 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 16:29:20,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:29:20,532 INFO L204 MainTranslator]: Completed translation [2024-10-24 16:29:20,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20 WrapperNode [2024-10-24 16:29:20,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 16:29:20,534 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 16:29:20,534 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 16:29:20,534 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 16:29:20,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,582 INFO L138 Inliner]: procedures = 120, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2024-10-24 16:29:20,584 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 16:29:20,584 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 16:29:20,585 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 16:29:20,585 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 16:29:20,595 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,601 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,620 INFO L175 MemorySlicer]: Split 12 memory accesses to 1 slices as follows [12]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 7 writes are split as follows [7]. [2024-10-24 16:29:20,621 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,621 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,630 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,631 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,632 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 16:29:20,637 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 16:29:20,637 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 16:29:20,637 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 16:29:20,638 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (1/1) ... [2024-10-24 16:29:20,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:29:20,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:20,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 16:29:20,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 16:29:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2024-10-24 16:29:20,729 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2024-10-24 16:29:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-10-24 16:29:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-10-24 16:29:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 16:29:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-24 16:29:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-24 16:29:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 16:29:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 16:29:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 16:29:20,847 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 16:29:20,850 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 16:29:21,164 INFO L? ?]: Removed 84 outVars from TransFormulas that were not future-live. [2024-10-24 16:29:21,164 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 16:29:21,225 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 16:29:21,225 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 16:29:21,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:29:21 BoogieIcfgContainer [2024-10-24 16:29:21,226 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 16:29:21,229 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 16:29:21,229 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 16:29:21,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 16:29:21,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:29:20" (1/3) ... [2024-10-24 16:29:21,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1751fbf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:29:21, skipping insertion in model container [2024-10-24 16:29:21,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:29:20" (2/3) ... [2024-10-24 16:29:21,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1751fbf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:29:21, skipping insertion in model container [2024-10-24 16:29:21,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:29:21" (3/3) ... [2024-10-24 16:29:21,237 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-shared-sll-before.i [2024-10-24 16:29:21,253 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 16:29:21,254 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2024-10-24 16:29:21,304 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 16:29:21,309 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;@2ebe1d06, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 16:29:21,310 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-10-24 16:29:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 65 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:29:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-24 16:29:21,317 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:21,318 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-24 16:29:21,318 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:21,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash 5463475, now seen corresponding path program 1 times [2024-10-24 16:29:21,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:21,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717770725] [2024-10-24 16:29:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:21,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:21,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:21,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717770725] [2024-10-24 16:29:21,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717770725] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:21,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:21,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:29:21,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952421535] [2024-10-24 16:29:21,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:21,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:29:21,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:21,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:29:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:29:21,560 INFO L87 Difference]: Start difference. First operand has 72 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 65 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2024-10-24 16:29:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:21,651 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2024-10-24 16:29:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:29:21,653 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 [2024-10-24 16:29:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:21,659 INFO L225 Difference]: With dead ends: 71 [2024-10-24 16:29:21,659 INFO L226 Difference]: Without dead ends: 70 [2024-10-24 16:29:21,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:29:21,663 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:21,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-24 16:29:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-10-24 16:29:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 63 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:29:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2024-10-24 16:29:21,695 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 4 [2024-10-24 16:29:21,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:21,695 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2024-10-24 16:29:21,695 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) [2024-10-24 16:29:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2024-10-24 16:29:21,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-24 16:29:21,696 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:21,696 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-24 16:29:21,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 16:29:21,696 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:21,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash 5463476, now seen corresponding path program 1 times [2024-10-24 16:29:21,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:21,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681292854] [2024-10-24 16:29:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:21,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:21,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:21,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681292854] [2024-10-24 16:29:21,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681292854] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:21,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:21,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:29:21,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640396164] [2024-10-24 16:29:21,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:21,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:29:21,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:29:21,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:29:21,810 INFO L87 Difference]: Start difference. First operand 70 states and 75 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) [2024-10-24 16:29:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:21,881 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2024-10-24 16:29:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:29:21,881 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 [2024-10-24 16:29:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:21,883 INFO L225 Difference]: With dead ends: 69 [2024-10-24 16:29:21,883 INFO L226 Difference]: Without dead ends: 69 [2024-10-24 16:29:21,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:29:21,884 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:21,885 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 108 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:21,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-24 16:29:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-24 16:29:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 62 states have internal predecessors, (66), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:29:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2024-10-24 16:29:21,898 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 4 [2024-10-24 16:29:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:21,899 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2024-10-24 16:29:21,899 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) [2024-10-24 16:29:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2024-10-24 16:29:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-24 16:29:21,901 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:21,901 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:21,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 16:29:21,901 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:21,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1547906994, now seen corresponding path program 1 times [2024-10-24 16:29:21,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:21,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191723383] [2024-10-24 16:29:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:21,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:22,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:22,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:22,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191723383] [2024-10-24 16:29:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191723383] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:22,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:22,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:29:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857995724] [2024-10-24 16:29:22,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:22,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:29:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:29:22,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:29:22,045 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-10-24 16:29:22,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:22,196 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2024-10-24 16:29:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:29:22,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 12 [2024-10-24 16:29:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:22,198 INFO L225 Difference]: With dead ends: 67 [2024-10-24 16:29:22,198 INFO L226 Difference]: Without dead ends: 67 [2024-10-24 16:29:22,199 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:29:22,200 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 1 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:22,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 120 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-24 16:29:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-10-24 16:29:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 60 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:29:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-10-24 16:29:22,223 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 12 [2024-10-24 16:29:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:22,225 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-10-24 16:29:22,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-10-24 16:29:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-10-24 16:29:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-24 16:29:22,225 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:22,226 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:22,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 16:29:22,226 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:22,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:22,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1547906995, now seen corresponding path program 1 times [2024-10-24 16:29:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:22,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427109812] [2024-10-24 16:29:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:22,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:22,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:22,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:22,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427109812] [2024-10-24 16:29:22,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427109812] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:22,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:22,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:29:22,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889705888] [2024-10-24 16:29:22,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:22,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:29:22,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:22,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:29:22,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:29:22,393 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-10-24 16:29:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:22,495 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-10-24 16:29:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:29:22,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 12 [2024-10-24 16:29:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:22,497 INFO L225 Difference]: With dead ends: 65 [2024-10-24 16:29:22,497 INFO L226 Difference]: Without dead ends: 65 [2024-10-24 16:29:22,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:29:22,498 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 1 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:22,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 125 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:22,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-24 16:29:22,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-10-24 16:29:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 58 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:29:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2024-10-24 16:29:22,512 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 12 [2024-10-24 16:29:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:22,513 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2024-10-24 16:29:22,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-10-24 16:29:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2024-10-24 16:29:22,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-24 16:29:22,513 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:22,514 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:22,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 16:29:22,514 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:22,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash 788353883, now seen corresponding path program 1 times [2024-10-24 16:29:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:22,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827958777] [2024-10-24 16:29:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:22,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:22,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:22,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:29:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:22,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:22,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827958777] [2024-10-24 16:29:22,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827958777] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:22,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558921758] [2024-10-24 16:29:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:22,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:22,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:22,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:22,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 16:29:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:22,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 16:29:22,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:22,970 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 [2024-10-24 16:29:23,024 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-10-24 16:29:23,048 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-24 16:29:23,049 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 [2024-10-24 16:29:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-10-24 16:29:23,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:23,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558921758] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:29:23,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:29:23,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2024-10-24 16:29:23,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17089504] [2024-10-24 16:29:23,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:23,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 16:29:23,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:23,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 16:29:23,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2024-10-24 16:29:23,199 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 16:29:23,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:23,556 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2024-10-24 16:29:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:29:23,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 13 [2024-10-24 16:29:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:23,558 INFO L225 Difference]: With dead ends: 69 [2024-10-24 16:29:23,559 INFO L226 Difference]: Without dead ends: 69 [2024-10-24 16:29:23,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=119, Unknown=1, NotChecked=22, Total=182 [2024-10-24 16:29:23,560 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 4 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:23,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 279 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 319 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2024-10-24 16:29:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-24 16:29:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2024-10-24 16:29:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 60 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 16:29:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2024-10-24 16:29:23,572 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 13 [2024-10-24 16:29:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:23,572 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2024-10-24 16:29:23,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 16:29:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2024-10-24 16:29:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-24 16:29:23,573 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:23,573 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:23,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 16:29:23,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:23,774 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:23,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:23,775 INFO L85 PathProgramCache]: Analyzing trace with hash 788353884, now seen corresponding path program 1 times [2024-10-24 16:29:23,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:23,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13500770] [2024-10-24 16:29:23,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:23,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:23,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:24,045 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:29:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:24,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:24,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13500770] [2024-10-24 16:29:24,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13500770] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:24,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956911921] [2024-10-24 16:29:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:24,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:24,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:24,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:24,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 16:29:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:24,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-24 16:29:24,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:24,212 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 [2024-10-24 16:29:24,375 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-10-24 16:29:24,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:29:24,398 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 16 treesize of output 11 [2024-10-24 16:29:24,406 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:24,408 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 [2024-10-24 16:29:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-10-24 16:29:24,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:24,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956911921] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:24,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:24,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2024-10-24 16:29:24,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110309636] [2024-10-24 16:29:24,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:24,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 16:29:24,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:24,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 16:29:24,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2024-10-24 16:29:24,546 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 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) [2024-10-24 16:29:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:24,877 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2024-10-24 16:29:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 16:29:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 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 13 [2024-10-24 16:29:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:24,879 INFO L225 Difference]: With dead ends: 69 [2024-10-24 16:29:24,881 INFO L226 Difference]: Without dead ends: 69 [2024-10-24 16:29:24,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=288, Unknown=1, NotChecked=34, Total=380 [2024-10-24 16:29:24,882 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:24,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 338 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 336 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2024-10-24 16:29:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-24 16:29:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2024-10-24 16:29:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 59 states have internal predecessors, (64), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 16:29:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2024-10-24 16:29:24,889 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 13 [2024-10-24 16:29:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:24,889 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2024-10-24 16:29:24,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 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) [2024-10-24 16:29:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2024-10-24 16:29:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-24 16:29:24,891 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:24,891 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:24,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 16:29:25,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-24 16:29:25,096 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:25,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash 588517071, now seen corresponding path program 1 times [2024-10-24 16:29:25,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:25,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624072998] [2024-10-24 16:29:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:25,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,174 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:25,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:25,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624072998] [2024-10-24 16:29:25,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624072998] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:25,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:25,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 16:29:25,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174763986] [2024-10-24 16:29:25,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:25,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 16:29:25,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 16:29:25,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:29:25,207 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2024-10-24 16:29:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:25,330 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2024-10-24 16:29:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:29:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 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 16 [2024-10-24 16:29:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:25,332 INFO L225 Difference]: With dead ends: 68 [2024-10-24 16:29:25,333 INFO L226 Difference]: Without dead ends: 68 [2024-10-24 16:29:25,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:29:25,334 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:25,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 188 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:25,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-24 16:29:25,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2024-10-24 16:29:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 56 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 16:29:25,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2024-10-24 16:29:25,339 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 16 [2024-10-24 16:29:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:25,339 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2024-10-24 16:29:25,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2024-10-24 16:29:25,339 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2024-10-24 16:29:25,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-24 16:29:25,340 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:25,340 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:25,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 16:29:25,341 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:25,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:25,341 INFO L85 PathProgramCache]: Analyzing trace with hash 588517072, now seen corresponding path program 1 times [2024-10-24 16:29:25,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:25,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529288269] [2024-10-24 16:29:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:25,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:25,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529288269] [2024-10-24 16:29:25,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529288269] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:25,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:25,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 16:29:25,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568202381] [2024-10-24 16:29:25,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:25,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 16:29:25,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:25,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 16:29:25,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:29:25,523 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2024-10-24 16:29:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:25,636 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2024-10-24 16:29:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:29:25,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 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 16 [2024-10-24 16:29:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:25,637 INFO L225 Difference]: With dead ends: 67 [2024-10-24 16:29:25,638 INFO L226 Difference]: Without dead ends: 67 [2024-10-24 16:29:25,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:29:25,638 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 4 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:25,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 213 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-24 16:29:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2024-10-24 16:29:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 55 states have internal predecessors, (60), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 16:29:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-10-24 16:29:25,643 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 16 [2024-10-24 16:29:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:25,643 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-10-24 16:29:25,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2024-10-24 16:29:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-10-24 16:29:25,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:29:25,644 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:25,645 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:25,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 16:29:25,645 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:25,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:25,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1064676751, now seen corresponding path program 1 times [2024-10-24 16:29:25,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:25,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097313727] [2024-10-24 16:29:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:25,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:29:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:29:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:29:25,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097313727] [2024-10-24 16:29:25,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097313727] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405820977] [2024-10-24 16:29:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:25,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:25,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:25,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:25,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 16:29:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:25,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 16:29:25,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:25,944 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 [2024-10-24 16:29:25,968 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 [2024-10-24 16:29:25,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-24 16:29:25,996 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-10-24 16:29:26,012 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-24 16:29:26,013 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 [2024-10-24 16:29:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-24 16:29:26,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:26,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405820977] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:29:26,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:29:26,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 12 [2024-10-24 16:29:26,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751481920] [2024-10-24 16:29:26,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:26,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 16:29:26,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:26,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 16:29:26,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=104, Unknown=1, NotChecked=20, Total=156 [2024-10-24 16:29:26,128 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 13 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-24 16:29:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:26,386 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-10-24 16:29:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 16:29:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 21 [2024-10-24 16:29:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:26,388 INFO L225 Difference]: With dead ends: 63 [2024-10-24 16:29:26,388 INFO L226 Difference]: Without dead ends: 63 [2024-10-24 16:29:26,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2024-10-24 16:29:26,389 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:26,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 339 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 326 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2024-10-24 16:29:26,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-24 16:29:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-10-24 16:29:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 54 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 16:29:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-10-24 16:29:26,393 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 21 [2024-10-24 16:29:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:26,393 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-10-24 16:29:26,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-24 16:29:26,394 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-10-24 16:29:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:29:26,394 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:26,394 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:26,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 16:29:26,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:26,596 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:26,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1064676752, now seen corresponding path program 1 times [2024-10-24 16:29:26,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:26,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589953054] [2024-10-24 16:29:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:26,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:26,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:26,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:29:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:26,849 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:29:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 16:29:26,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:26,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589953054] [2024-10-24 16:29:26,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589953054] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:26,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808633652] [2024-10-24 16:29:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:26,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:26,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:26,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:26,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 16:29:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:26,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-24 16:29:26,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:27,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:29:27,003 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 [2024-10-24 16:29:27,077 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 [2024-10-24 16:29:27,080 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 [2024-10-24 16:29:27,116 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 26 treesize of output 14 [2024-10-24 16:29:27,184 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-10-24 16:29:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:29:27,202 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 [2024-10-24 16:29:27,209 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:27,210 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 [2024-10-24 16:29:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-24 16:29:27,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:27,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808633652] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:27,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:27,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-10-24 16:29:27,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419135342] [2024-10-24 16:29:27,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:27,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 16:29:27,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 16:29:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=298, Unknown=1, NotChecked=34, Total=380 [2024-10-24 16:29:27,346 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 16:29:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:27,804 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-10-24 16:29:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 16:29:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 21 [2024-10-24 16:29:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:27,805 INFO L225 Difference]: With dead ends: 63 [2024-10-24 16:29:27,805 INFO L226 Difference]: Without dead ends: 63 [2024-10-24 16:29:27,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=561, Unknown=1, NotChecked=48, Total=702 [2024-10-24 16:29:27,806 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 3 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:27,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 532 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 473 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2024-10-24 16:29:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-24 16:29:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2024-10-24 16:29:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:29:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-10-24 16:29:27,814 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 21 [2024-10-24 16:29:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:27,814 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-10-24 16:29:27,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 16:29:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-10-24 16:29:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:29:27,815 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:27,815 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] [2024-10-24 16:29:27,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 16:29:28,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:28,020 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:28,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash -276248669, now seen corresponding path program 1 times [2024-10-24 16:29:28,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:28,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623703465] [2024-10-24 16:29:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:28,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:28,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:28,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:28,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:28,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623703465] [2024-10-24 16:29:28,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623703465] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:28,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:28,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 16:29:28,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197958708] [2024-10-24 16:29:28,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:28,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 16:29:28,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:28,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 16:29:28,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:29:28,223 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:29:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:28,400 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2024-10-24 16:29:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 16:29:28,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-10-24 16:29:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:28,401 INFO L225 Difference]: With dead ends: 58 [2024-10-24 16:29:28,401 INFO L226 Difference]: Without dead ends: 58 [2024-10-24 16:29:28,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:29:28,402 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:28,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 155 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:29:28,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-24 16:29:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-24 16:29:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 51 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 16:29:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2024-10-24 16:29:28,405 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 21 [2024-10-24 16:29:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:28,406 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2024-10-24 16:29:28,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:29:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2024-10-24 16:29:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:29:28,407 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:28,407 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] [2024-10-24 16:29:28,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-24 16:29:28,407 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:28,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:28,408 INFO L85 PathProgramCache]: Analyzing trace with hash -276248668, now seen corresponding path program 1 times [2024-10-24 16:29:28,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:28,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4264396] [2024-10-24 16:29:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:28,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:28,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:28,640 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:28,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:28,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4264396] [2024-10-24 16:29:28,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4264396] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:28,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:28,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-24 16:29:28,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043535073] [2024-10-24 16:29:28,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:28,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 16:29:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:28,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 16:29:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-10-24 16:29:28,718 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 12 states, 8 states have (on average 2.125) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:29:28,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:28,994 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-10-24 16:29:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 16:29:28,994 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 2.125) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-10-24 16:29:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:28,995 INFO L225 Difference]: With dead ends: 72 [2024-10-24 16:29:28,995 INFO L226 Difference]: Without dead ends: 72 [2024-10-24 16:29:28,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-10-24 16:29:28,996 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:28,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 244 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:29:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-24 16:29:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-10-24 16:29:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 62 states have internal predecessors, (71), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 16:29:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2024-10-24 16:29:29,000 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 21 [2024-10-24 16:29:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:29,000 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2024-10-24 16:29:29,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 2.125) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:29:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2024-10-24 16:29:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-24 16:29:29,001 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:29,001 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, 1] [2024-10-24 16:29:29,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-24 16:29:29,002 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:29,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:29,002 INFO L85 PathProgramCache]: Analyzing trace with hash 812956819, now seen corresponding path program 1 times [2024-10-24 16:29:29,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:29,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680966359] [2024-10-24 16:29:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:29,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:29,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:29,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680966359] [2024-10-24 16:29:29,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680966359] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:29,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:29,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 16:29:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188364541] [2024-10-24 16:29:29,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:29,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:29:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:29:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:29:29,112 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:29:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:29,211 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2024-10-24 16:29:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:29:29,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-10-24 16:29:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:29,212 INFO L225 Difference]: With dead ends: 74 [2024-10-24 16:29:29,212 INFO L226 Difference]: Without dead ends: 74 [2024-10-24 16:29:29,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:29:29,213 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 19 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:29,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 300 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-24 16:29:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2024-10-24 16:29:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 62 states have internal predecessors, (69), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 16:29:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2024-10-24 16:29:29,216 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 23 [2024-10-24 16:29:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:29,217 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2024-10-24 16:29:29,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:29:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2024-10-24 16:29:29,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-24 16:29:29,218 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:29,218 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, 1] [2024-10-24 16:29:29,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-24 16:29:29,218 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:29,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:29,219 INFO L85 PathProgramCache]: Analyzing trace with hash 813066789, now seen corresponding path program 1 times [2024-10-24 16:29:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:29,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408697061] [2024-10-24 16:29:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:29,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,293 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:29,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:29,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408697061] [2024-10-24 16:29:29,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408697061] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:29,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:29,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 16:29:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237040693] [2024-10-24 16:29:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:29,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:29:29,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:29:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:29:29,336 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:29:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:29,473 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2024-10-24 16:29:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:29:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-10-24 16:29:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:29,475 INFO L225 Difference]: With dead ends: 73 [2024-10-24 16:29:29,475 INFO L226 Difference]: Without dead ends: 73 [2024-10-24 16:29:29,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:29:29,476 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:29,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 250 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-24 16:29:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2024-10-24 16:29:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.469387755102041) internal successors, (72), 64 states have internal predecessors, (72), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 16:29:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2024-10-24 16:29:29,483 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 23 [2024-10-24 16:29:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:29,483 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2024-10-24 16:29:29,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 16:29:29,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2024-10-24 16:29:29,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-24 16:29:29,484 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:29,484 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:29,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-24 16:29:29,484 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:29,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:29,485 INFO L85 PathProgramCache]: Analyzing trace with hash 899246978, now seen corresponding path program 1 times [2024-10-24 16:29:29,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:29,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835047949] [2024-10-24 16:29:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:29,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-24 16:29:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:29,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:29,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835047949] [2024-10-24 16:29:29,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835047949] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:29,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023190216] [2024-10-24 16:29:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:29,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:29,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:29,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:29,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 16:29:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:29,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 16:29:29,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:29,811 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 [2024-10-24 16:29:29,838 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-24 16:29:29,838 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 [2024-10-24 16:29:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:29,841 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:29:29,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023190216] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:29,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:29:29,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-10-24 16:29:29,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721914445] [2024-10-24 16:29:29,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:29,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:29:29,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:29,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:29:29,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2024-10-24 16:29:29,843 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 16:29:29,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:29,895 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2024-10-24 16:29:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:29:29,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-24 16:29:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:29,897 INFO L225 Difference]: With dead ends: 77 [2024-10-24 16:29:29,897 INFO L226 Difference]: Without dead ends: 77 [2024-10-24 16:29:29,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2024-10-24 16:29:29,898 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:29,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 96 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 78 Unchecked, 0.0s Time] [2024-10-24 16:29:29,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-24 16:29:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-10-24 16:29:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 67 states have internal predecessors, (77), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 16:29:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2024-10-24 16:29:29,903 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 24 [2024-10-24 16:29:29,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:29,904 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2024-10-24 16:29:29,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 16:29:29,904 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2024-10-24 16:29:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-24 16:29:29,906 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:29,906 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:29,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-24 16:29:30,106 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,SelfDestructingSolverStorable14 [2024-10-24 16:29:30,107 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:30,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash 899246979, now seen corresponding path program 1 times [2024-10-24 16:29:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:30,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302460535] [2024-10-24 16:29:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:30,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:30,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:30,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:30,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-24 16:29:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:30,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302460535] [2024-10-24 16:29:30,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302460535] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832979470] [2024-10-24 16:29:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:30,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:30,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:30,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:30,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 16:29:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:30,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 16:29:30,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:30,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:29:30,706 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 [2024-10-24 16:29:30,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:29:30,727 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 [2024-10-24 16:29:30,734 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:30,735 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 [2024-10-24 16:29:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-10-24 16:29:30,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:30,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832979470] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:30,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:30,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2024-10-24 16:29:30,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013003909] [2024-10-24 16:29:30,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:30,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 16:29:30,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:30,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 16:29:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=257, Unknown=1, NotChecked=32, Total=342 [2024-10-24 16:29:30,825 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 17 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 16:29:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:31,107 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2024-10-24 16:29:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 16:29:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2024-10-24 16:29:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:31,109 INFO L225 Difference]: With dead ends: 82 [2024-10-24 16:29:31,109 INFO L226 Difference]: Without dead ends: 82 [2024-10-24 16:29:31,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2024-10-24 16:29:31,110 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:31,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 313 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 335 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2024-10-24 16:29:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-24 16:29:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2024-10-24 16:29:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 70 states have internal predecessors, (81), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 16:29:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2024-10-24 16:29:31,115 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 24 [2024-10-24 16:29:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:31,115 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2024-10-24 16:29:31,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 16:29:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2024-10-24 16:29:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 16:29:31,117 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:31,117 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:31,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 16:29:31,318 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,SelfDestructingSolverStorable15 [2024-10-24 16:29:31,318 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:31,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:31,319 INFO L85 PathProgramCache]: Analyzing trace with hash 888010628, now seen corresponding path program 1 times [2024-10-24 16:29:31,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:31,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259871973] [2024-10-24 16:29:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:31,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:31,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:31,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:31,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-24 16:29:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:31,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:31,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259871973] [2024-10-24 16:29:31,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259871973] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:31,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:31,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 16:29:31,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24140956] [2024-10-24 16:29:31,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:31,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 16:29:31,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 16:29:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:29:31,576 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-24 16:29:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:31,695 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2024-10-24 16:29:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:29:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-10-24 16:29:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:31,697 INFO L225 Difference]: With dead ends: 78 [2024-10-24 16:29:31,697 INFO L226 Difference]: Without dead ends: 78 [2024-10-24 16:29:31,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:29:31,697 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:31,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 237 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-24 16:29:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-10-24 16:29:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 69 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 16:29:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2024-10-24 16:29:31,702 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 26 [2024-10-24 16:29:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:31,702 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2024-10-24 16:29:31,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-24 16:29:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2024-10-24 16:29:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 16:29:31,703 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:31,703 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:31,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-24 16:29:31,704 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:31,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash 888010627, now seen corresponding path program 1 times [2024-10-24 16:29:31,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:31,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291717133] [2024-10-24 16:29:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:31,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:31,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:31,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:31,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-24 16:29:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:29:31,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:31,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291717133] [2024-10-24 16:29:31,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291717133] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:31,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:31,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 16:29:31,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281238112] [2024-10-24 16:29:31,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:31,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 16:29:31,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:31,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 16:29:31,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:29:31,841 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-24 16:29:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:31,958 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2024-10-24 16:29:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:29:31,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-10-24 16:29:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:31,960 INFO L225 Difference]: With dead ends: 77 [2024-10-24 16:29:31,960 INFO L226 Difference]: Without dead ends: 77 [2024-10-24 16:29:31,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:29:31,960 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:31,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 221 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-24 16:29:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-10-24 16:29:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.4) internal successors, (77), 68 states have internal predecessors, (77), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 16:29:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2024-10-24 16:29:31,964 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 26 [2024-10-24 16:29:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:31,964 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2024-10-24 16:29:31,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-24 16:29:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2024-10-24 16:29:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 16:29:31,965 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:31,965 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, 1, 1, 1, 1, 1] [2024-10-24 16:29:31,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-24 16:29:31,965 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:31,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:31,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1542715526, now seen corresponding path program 1 times [2024-10-24 16:29:31,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:31,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99795328] [2024-10-24 16:29:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:31,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:32,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:32,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:32,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99795328] [2024-10-24 16:29:32,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99795328] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926814898] [2024-10-24 16:29:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:32,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:32,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 16:29:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:32,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-24 16:29:32,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:32,660 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 [2024-10-24 16:29:32,686 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 [2024-10-24 16:29:32,692 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 [2024-10-24 16:29:32,967 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:32,967 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 [2024-10-24 16:29:36,976 WARN L851 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (or (= (select (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (exists ((|v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_#memory_$Pointer$#0.offset|))) (and (= |c_#memory_$Pointer$#0.offset| (store |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| .cse0 (select |c_#memory_$Pointer$#0.offset| .cse0))) (= |c_ULTIMATE.start_create_#t~ret9#1.base| .cse0) (= (select (select |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))))) (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))) is different from false [2024-10-24 16:29:36,979 WARN L873 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (or (= (select (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (exists ((|v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_#memory_$Pointer$#0.offset|))) (and (= |c_#memory_$Pointer$#0.offset| (store |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| .cse0 (select |c_#memory_$Pointer$#0.offset| .cse0))) (= |c_ULTIMATE.start_create_#t~ret9#1.base| .cse0) (= (select (select |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))))) (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))) is different from true [2024-10-24 16:29:37,032 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 16 treesize of output 11 [2024-10-24 16:29:37,040 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 16 treesize of output 11 [2024-10-24 16:29:37,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:29:37,130 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 [2024-10-24 16:29:37,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:29:37,142 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 [2024-10-24 16:29:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:37,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:37,345 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_824 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_824) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_825 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_825) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) is different from false [2024-10-24 16:29:37,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926814898] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:37,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:37,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2024-10-24 16:29:37,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647092818] [2024-10-24 16:29:37,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:37,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-24 16:29:37,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:37,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-24 16:29:37,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=728, Unknown=22, NotChecked=110, Total=930 [2024-10-24 16:29:37,468 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:29:37,720 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|))) (let ((.cse1 (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|)) (.cse2 (= (select .cse0 0) 0))) (and (= (select .cse0 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (= (select .cse1 0) 0) (= (select .cse1 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (or .cse2 (exists ((|v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse3 (@diff |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_#memory_$Pointer$#0.offset|))) (and (= |c_#memory_$Pointer$#0.offset| (store |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| .cse3 (select |c_#memory_$Pointer$#0.offset| .cse3))) (= |c_ULTIMATE.start_create_#t~ret9#1.base| .cse3) (= (select (select |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))))) .cse2 (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))))) is different from false [2024-10-24 16:29:37,721 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|))) (let ((.cse1 (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|)) (.cse2 (= (select .cse0 0) 0))) (and (= (select .cse0 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (= (select .cse1 0) 0) (= (select .cse1 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (or .cse2 (exists ((|v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse3 (@diff |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_#memory_$Pointer$#0.offset|))) (and (= |c_#memory_$Pointer$#0.offset| (store |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| .cse3 (select |c_#memory_$Pointer$#0.offset| .cse3))) (= |c_ULTIMATE.start_create_#t~ret9#1.base| .cse3) (= (select (select |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))))) .cse2 (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))))) is different from true [2024-10-24 16:29:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:38,089 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2024-10-24 16:29:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 16:29:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2024-10-24 16:29:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:38,090 INFO L225 Difference]: With dead ends: 82 [2024-10-24 16:29:38,090 INFO L226 Difference]: Without dead ends: 82 [2024-10-24 16:29:38,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=116, Invalid=1201, Unknown=27, NotChecked=216, Total=1560 [2024-10-24 16:29:38,092 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:38,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 510 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 612 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2024-10-24 16:29:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-24 16:29:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-10-24 16:29:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 71 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 16:29:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2024-10-24 16:29:38,097 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 26 [2024-10-24 16:29:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:38,097 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2024-10-24 16:29:38,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 16:29:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2024-10-24 16:29:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 16:29:38,097 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:38,097 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, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:38,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 16:29:38,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:38,299 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:38,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:38,299 INFO L85 PathProgramCache]: Analyzing trace with hash -785947990, now seen corresponding path program 1 times [2024-10-24 16:29:38,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:38,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061412334] [2024-10-24 16:29:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:38,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:38,489 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:38,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:38,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:38,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061412334] [2024-10-24 16:29:38,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061412334] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:38,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777312696] [2024-10-24 16:29:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:38,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:38,594 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:38,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 16:29:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:38,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-24 16:29:38,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:38,720 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 [2024-10-24 16:29:38,790 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:38,792 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 [2024-10-24 16:29:38,866 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 [2024-10-24 16:29:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:38,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:38,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:29:38,923 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 17 treesize of output 21 [2024-10-24 16:29:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:39,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777312696] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:29:39,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:29:39,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 25 [2024-10-24 16:29:39,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692679587] [2024-10-24 16:29:39,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:39,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 16:29:39,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:39,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 16:29:39,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2024-10-24 16:29:39,082 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 26 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 16:29:39,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:39,620 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2024-10-24 16:29:39,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 16:29:39,621 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2024-10-24 16:29:39,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:39,622 INFO L225 Difference]: With dead ends: 103 [2024-10-24 16:29:39,622 INFO L226 Difference]: Without dead ends: 103 [2024-10-24 16:29:39,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 16:29:39,623 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:39,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 336 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:29:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-24 16:29:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2024-10-24 16:29:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 82 states have internal predecessors, (97), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 16:29:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2024-10-24 16:29:39,627 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 28 [2024-10-24 16:29:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:39,627 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2024-10-24 16:29:39,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 16:29:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2024-10-24 16:29:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 16:29:39,628 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:39,628 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, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:39,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-24 16:29:39,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:39,833 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:39,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:39,833 INFO L85 PathProgramCache]: Analyzing trace with hash -785947989, now seen corresponding path program 1 times [2024-10-24 16:29:39,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:39,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976345159] [2024-10-24 16:29:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:39,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:39,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:39,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:40,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:40,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976345159] [2024-10-24 16:29:40,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976345159] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:40,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:40,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 16:29:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492761692] [2024-10-24 16:29:40,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:40,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 16:29:40,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:40,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 16:29:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:29:40,024 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2024-10-24 16:29:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:40,167 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2024-10-24 16:29:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 16:29:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 28 [2024-10-24 16:29:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:40,175 INFO L225 Difference]: With dead ends: 114 [2024-10-24 16:29:40,175 INFO L226 Difference]: Without dead ends: 114 [2024-10-24 16:29:40,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:29:40,176 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:40,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 302 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-10-24 16:29:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2024-10-24 16:29:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 89 states have (on average 1.4269662921348314) internal successors, (127), 101 states have internal predecessors, (127), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 16:29:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 139 transitions. [2024-10-24 16:29:40,181 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 139 transitions. Word has length 28 [2024-10-24 16:29:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:40,181 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 139 transitions. [2024-10-24 16:29:40,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2024-10-24 16:29:40,182 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 139 transitions. [2024-10-24 16:29:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-24 16:29:40,182 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:40,182 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:40,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-24 16:29:40,183 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:40,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash 887991768, now seen corresponding path program 1 times [2024-10-24 16:29:40,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:40,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827383487] [2024-10-24 16:29:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:40,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:40,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:40,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:29:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:40,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 16:29:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:40,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:40,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827383487] [2024-10-24 16:29:40,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827383487] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:40,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179157828] [2024-10-24 16:29:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:40,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:40,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:40,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:40,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 16:29:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:40,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-24 16:29:40,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:40,690 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 [2024-10-24 16:29:40,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:29:40,837 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-10-24 16:29:40,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:29:40,850 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 [2024-10-24 16:29:40,857 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:40,857 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 [2024-10-24 16:29:40,926 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 [2024-10-24 16:29:40,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:29:40,947 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 [2024-10-24 16:29:40,954 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:40,955 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 [2024-10-24 16:29:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-10-24 16:29:40,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:41,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179157828] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:41,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:41,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2024-10-24 16:29:41,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350034520] [2024-10-24 16:29:41,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:41,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 16:29:41,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 16:29:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=451, Unknown=2, NotChecked=86, Total=600 [2024-10-24 16:29:41,124 INFO L87 Difference]: Start difference. First operand 110 states and 139 transitions. Second operand has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-24 16:29:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:41,560 INFO L93 Difference]: Finished difference Result 127 states and 162 transitions. [2024-10-24 16:29:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 16:29:41,561 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2024-10-24 16:29:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:41,562 INFO L225 Difference]: With dead ends: 127 [2024-10-24 16:29:41,562 INFO L226 Difference]: Without dead ends: 127 [2024-10-24 16:29:41,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=676, Unknown=2, NotChecked=106, Total=870 [2024-10-24 16:29:41,562 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:41,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 404 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 456 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2024-10-24 16:29:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-24 16:29:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-10-24 16:29:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.392156862745098) internal successors, (142), 114 states have internal predecessors, (142), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-24 16:29:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 158 transitions. [2024-10-24 16:29:41,569 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 158 transitions. Word has length 29 [2024-10-24 16:29:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:41,570 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 158 transitions. [2024-10-24 16:29:41,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-24 16:29:41,570 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 158 transitions. [2024-10-24 16:29:41,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-24 16:29:41,571 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:41,571 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:41,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 16:29:41,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:41,774 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:41,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1405414659, now seen corresponding path program 1 times [2024-10-24 16:29:41,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:41,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710587144] [2024-10-24 16:29:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:41,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:41,885 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:41,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:41,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:41,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710587144] [2024-10-24 16:29:41,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710587144] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:41,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:41,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 16:29:41,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051849496] [2024-10-24 16:29:41,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:41,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:29:41,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:29:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:29:41,927 INFO L87 Difference]: Start difference. First operand 125 states and 158 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2024-10-24 16:29:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:42,036 INFO L93 Difference]: Finished difference Result 131 states and 164 transitions. [2024-10-24 16:29:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:29:42,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 29 [2024-10-24 16:29:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:42,037 INFO L225 Difference]: With dead ends: 131 [2024-10-24 16:29:42,037 INFO L226 Difference]: Without dead ends: 131 [2024-10-24 16:29:42,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:29:42,038 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 18 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:42,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 263 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-24 16:29:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2024-10-24 16:29:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 103 states have (on average 1.3592233009708738) internal successors, (140), 115 states have internal predecessors, (140), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-24 16:29:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 156 transitions. [2024-10-24 16:29:42,046 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 156 transitions. Word has length 29 [2024-10-24 16:29:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:42,046 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 156 transitions. [2024-10-24 16:29:42,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2024-10-24 16:29:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 156 transitions. [2024-10-24 16:29:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-24 16:29:42,047 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:42,047 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:42,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-24 16:29:42,047 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:42,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:42,048 INFO L85 PathProgramCache]: Analyzing trace with hash 618268724, now seen corresponding path program 1 times [2024-10-24 16:29:42,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:42,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889393608] [2024-10-24 16:29:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:42,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:42,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:42,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:42,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:42,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889393608] [2024-10-24 16:29:42,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889393608] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:29:42,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:29:42,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 16:29:42,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32379789] [2024-10-24 16:29:42,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:29:42,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:29:42,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:29:42,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:29:42,172 INFO L87 Difference]: Start difference. First operand 126 states and 156 transitions. Second operand has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2024-10-24 16:29:42,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:42,307 INFO L93 Difference]: Finished difference Result 130 states and 162 transitions. [2024-10-24 16:29:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:29:42,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 30 [2024-10-24 16:29:42,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:42,309 INFO L225 Difference]: With dead ends: 130 [2024-10-24 16:29:42,309 INFO L226 Difference]: Without dead ends: 130 [2024-10-24 16:29:42,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:29:42,310 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 15 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:42,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 233 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:29:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-24 16:29:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2024-10-24 16:29:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 118 states have internal predecessors, (146), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-24 16:29:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 162 transitions. [2024-10-24 16:29:42,314 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 162 transitions. Word has length 30 [2024-10-24 16:29:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:42,315 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 162 transitions. [2024-10-24 16:29:42,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2024-10-24 16:29:42,315 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 162 transitions. [2024-10-24 16:29:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-24 16:29:42,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:42,316 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, 1, 1, 1, 1, 1] [2024-10-24 16:29:42,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-24 16:29:42,316 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:42,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1656647488, now seen corresponding path program 1 times [2024-10-24 16:29:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:42,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588718697] [2024-10-24 16:29:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:42,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:42,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:42,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:42,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-24 16:29:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:42,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:42,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588718697] [2024-10-24 16:29:42,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588718697] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:42,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474572441] [2024-10-24 16:29:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:42,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:42,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:42,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:42,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 16:29:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:42,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-24 16:29:42,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:42,941 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 [2024-10-24 16:29:42,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:29:43,194 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 16:29:43,195 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 14 treesize of output 13 [2024-10-24 16:29:43,217 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-24 16:29:43,217 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 [2024-10-24 16:29:43,344 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 [2024-10-24 16:29:43,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:29:43,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2024-10-24 16:29:43,380 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-10-24 16:29:43,381 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 16 treesize of output 18 [2024-10-24 16:29:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2024-10-24 16:29:43,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:43,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474572441] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:43,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:43,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2024-10-24 16:29:43,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71460209] [2024-10-24 16:29:43,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:43,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-24 16:29:43,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-24 16:29:43,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=829, Unknown=1, NotChecked=58, Total=992 [2024-10-24 16:29:43,580 INFO L87 Difference]: Start difference. First operand 129 states and 162 transitions. Second operand has 29 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 24 states have internal predecessors, (51), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:29:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:44,109 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2024-10-24 16:29:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 16:29:44,109 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 24 states have internal predecessors, (51), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2024-10-24 16:29:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:44,110 INFO L225 Difference]: With dead ends: 155 [2024-10-24 16:29:44,110 INFO L226 Difference]: Without dead ends: 155 [2024-10-24 16:29:44,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=1316, Unknown=1, NotChecked=74, Total=1560 [2024-10-24 16:29:44,111 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:44,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 335 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 608 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2024-10-24 16:29:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-10-24 16:29:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2024-10-24 16:29:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 126 states have (on average 1.3650793650793651) internal successors, (172), 138 states have internal predecessors, (172), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 16:29:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 192 transitions. [2024-10-24 16:29:44,116 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 192 transitions. Word has length 32 [2024-10-24 16:29:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:44,116 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 192 transitions. [2024-10-24 16:29:44,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 24 states have internal predecessors, (51), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:29:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 192 transitions. [2024-10-24 16:29:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-24 16:29:44,117 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:44,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:44,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 16:29:44,321 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,SelfDestructingSolverStorable24 [2024-10-24 16:29:44,322 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:44,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:44,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2023937090, now seen corresponding path program 1 times [2024-10-24 16:29:44,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:44,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225834820] [2024-10-24 16:29:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:44,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:44,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:44,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:44,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:44,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225834820] [2024-10-24 16:29:44,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225834820] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:44,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860475195] [2024-10-24 16:29:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:44,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:44,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:44,708 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:44,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 16:29:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:44,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-24 16:29:44,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:44,862 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 [2024-10-24 16:29:44,867 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 [2024-10-24 16:29:44,876 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 [2024-10-24 16:29:44,880 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 [2024-10-24 16:29:44,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:29:44,962 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 11 [2024-10-24 16:29:44,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:29:44,968 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 11 [2024-10-24 16:29:45,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:29:45,070 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 [2024-10-24 16:29:45,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:29:45,080 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 [2024-10-24 16:29:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:45,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:45,615 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 20 treesize of output 18 [2024-10-24 16:29:45,625 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 250 treesize of output 246 [2024-10-24 16:29:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:45,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860475195] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:29:45,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:29:45,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-10-24 16:29:45,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069727237] [2024-10-24 16:29:45,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:45,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 16:29:45,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:45,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 16:29:45,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2024-10-24 16:29:45,666 INFO L87 Difference]: Start difference. First operand 151 states and 192 transitions. Second operand has 25 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:29:46,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:46,085 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2024-10-24 16:29:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 16:29:46,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-10-24 16:29:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:46,086 INFO L225 Difference]: With dead ends: 158 [2024-10-24 16:29:46,086 INFO L226 Difference]: Without dead ends: 158 [2024-10-24 16:29:46,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2024-10-24 16:29:46,087 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:46,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 610 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:29:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-24 16:29:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2024-10-24 16:29:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 129 states have (on average 1.3565891472868217) internal successors, (175), 141 states have internal predecessors, (175), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 16:29:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2024-10-24 16:29:46,092 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 33 [2024-10-24 16:29:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:46,092 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2024-10-24 16:29:46,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 16:29:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2024-10-24 16:29:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-24 16:29:46,093 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:46,093 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:46,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-24 16:29:46,297 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,SelfDestructingSolverStorable25 [2024-10-24 16:29:46,298 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:46,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:46,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1749859558, now seen corresponding path program 1 times [2024-10-24 16:29:46,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:46,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116794660] [2024-10-24 16:29:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:46,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:46,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:46,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:46,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-24 16:29:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:46,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-24 16:29:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:29:46,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:46,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116794660] [2024-10-24 16:29:46,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116794660] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:46,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789735456] [2024-10-24 16:29:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:46,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:46,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:46,678 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) [2024-10-24 16:29:46,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 16:29:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:46,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-24 16:29:46,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:46,878 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:46,878 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 [2024-10-24 16:29:46,896 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 [2024-10-24 16:29:46,941 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-24 16:29:46,942 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 [2024-10-24 16:29:46,948 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 [2024-10-24 16:29:46,977 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 [2024-10-24 16:29:46,998 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-24 16:29:46,999 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 [2024-10-24 16:29:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2024-10-24 16:29:47,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:47,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789735456] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:47,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:47,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 21 [2024-10-24 16:29:47,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109421051] [2024-10-24 16:29:47,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:47,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 16:29:47,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:47,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 16:29:47,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=407, Unknown=1, NotChecked=40, Total=506 [2024-10-24 16:29:47,054 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand has 22 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-24 16:29:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:47,340 INFO L93 Difference]: Finished difference Result 153 states and 193 transitions. [2024-10-24 16:29:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 16:29:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 35 [2024-10-24 16:29:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:47,341 INFO L225 Difference]: With dead ends: 153 [2024-10-24 16:29:47,342 INFO L226 Difference]: Without dead ends: 153 [2024-10-24 16:29:47,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=611, Unknown=1, NotChecked=50, Total=756 [2024-10-24 16:29:47,343 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:47,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 389 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 371 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2024-10-24 16:29:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-24 16:29:47,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-10-24 16:29:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 129 states have (on average 1.3410852713178294) internal successors, (173), 140 states have internal predecessors, (173), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 16:29:47,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 193 transitions. [2024-10-24 16:29:47,349 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 193 transitions. Word has length 35 [2024-10-24 16:29:47,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:47,349 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 193 transitions. [2024-10-24 16:29:47,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-24 16:29:47,350 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 193 transitions. [2024-10-24 16:29:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-24 16:29:47,350 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:47,350 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:47,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-24 16:29:47,554 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,SelfDestructingSolverStorable26 [2024-10-24 16:29:47,555 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:47,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1749859559, now seen corresponding path program 1 times [2024-10-24 16:29:47,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:47,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532543662] [2024-10-24 16:29:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:47,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:47,934 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:47,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:47,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-24 16:29:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:48,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-24 16:29:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 16:29:48,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:48,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532543662] [2024-10-24 16:29:48,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532543662] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:48,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115604992] [2024-10-24 16:29:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:48,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:48,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:48,140 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) [2024-10-24 16:29:48,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 16:29:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:48,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-24 16:29:48,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:48,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:29:48,397 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:48,397 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 [2024-10-24 16:29:48,425 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 [2024-10-24 16:29:48,431 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 [2024-10-24 16:29:48,504 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-24 16:29:48,504 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 [2024-10-24 16:29:48,509 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 [2024-10-24 16:29:48,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2024-10-24 16:29:48,528 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 [2024-10-24 16:29:48,570 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 [2024-10-24 16:29:48,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:29:48,585 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 [2024-10-24 16:29:48,593 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:48,594 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 [2024-10-24 16:29:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-10-24 16:29:48,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:48,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115604992] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:48,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:48,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2024-10-24 16:29:48,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442829947] [2024-10-24 16:29:48,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:48,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 16:29:48,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:48,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 16:29:48,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=631, Unknown=1, NotChecked=50, Total=756 [2024-10-24 16:29:48,701 INFO L87 Difference]: Start difference. First operand 153 states and 193 transitions. Second operand has 26 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-24 16:29:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:49,136 INFO L93 Difference]: Finished difference Result 150 states and 187 transitions. [2024-10-24 16:29:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 16:29:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 35 [2024-10-24 16:29:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:49,137 INFO L225 Difference]: With dead ends: 150 [2024-10-24 16:29:49,137 INFO L226 Difference]: Without dead ends: 150 [2024-10-24 16:29:49,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=990, Unknown=1, NotChecked=64, Total=1190 [2024-10-24 16:29:49,138 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:49,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 593 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 603 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2024-10-24 16:29:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-24 16:29:49,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-10-24 16:29:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 129 states have (on average 1.2945736434108528) internal successors, (167), 137 states have internal predecessors, (167), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 16:29:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 187 transitions. [2024-10-24 16:29:49,144 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 187 transitions. Word has length 35 [2024-10-24 16:29:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:49,144 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 187 transitions. [2024-10-24 16:29:49,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-24 16:29:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 187 transitions. [2024-10-24 16:29:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 16:29:49,145 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:49,145 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:49,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-24 16:29:49,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-24 16:29:49,350 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:49,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:49,350 INFO L85 PathProgramCache]: Analyzing trace with hash -259857978, now seen corresponding path program 1 times [2024-10-24 16:29:49,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:49,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419645104] [2024-10-24 16:29:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:49,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:49,708 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:49,730 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:29:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:49,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 16:29:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:49,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:49,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419645104] [2024-10-24 16:29:49,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419645104] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:49,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352062121] [2024-10-24 16:29:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:49,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:49,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:49,954 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:49,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 16:29:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:50,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-24 16:29:50,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:50,101 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 [2024-10-24 16:29:50,287 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-24 16:29:50,287 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 [2024-10-24 16:29:50,325 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 [2024-10-24 16:29:50,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:29:50,505 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 26 treesize of output 19 [2024-10-24 16:29:50,526 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2024-10-24 16:29:50,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-10-24 16:29:50,605 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 34 treesize of output 25 [2024-10-24 16:29:50,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:29:50,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 33 treesize of output 25 [2024-10-24 16:29:50,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-24 16:29:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:50,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:51,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352062121] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:51,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:51,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 40 [2024-10-24 16:29:51,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135328884] [2024-10-24 16:29:51,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:51,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-24 16:29:51,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-24 16:29:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2024-10-24 16:29:51,315 INFO L87 Difference]: Start difference. First operand 150 states and 187 transitions. Second operand has 41 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:29:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:52,307 INFO L93 Difference]: Finished difference Result 163 states and 205 transitions. [2024-10-24 16:29:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 16:29:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2024-10-24 16:29:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:52,308 INFO L225 Difference]: With dead ends: 163 [2024-10-24 16:29:52,308 INFO L226 Difference]: Without dead ends: 163 [2024-10-24 16:29:52,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=3298, Unknown=0, NotChecked=0, Total=3540 [2024-10-24 16:29:52,310 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 32 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:52,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 774 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 16:29:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-10-24 16:29:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 154. [2024-10-24 16:29:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 133 states have (on average 1.300751879699248) internal successors, (173), 141 states have internal predecessors, (173), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 16:29:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 193 transitions. [2024-10-24 16:29:52,314 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 193 transitions. Word has length 34 [2024-10-24 16:29:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:52,314 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 193 transitions. [2024-10-24 16:29:52,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:29:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 193 transitions. [2024-10-24 16:29:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 16:29:52,315 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:52,315 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:52,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-24 16:29:52,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:52,520 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:52,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash -259857977, now seen corresponding path program 1 times [2024-10-24 16:29:52,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:52,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209558475] [2024-10-24 16:29:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:52,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:52,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:29:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:53,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 16:29:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:53,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:53,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209558475] [2024-10-24 16:29:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209558475] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:53,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515308677] [2024-10-24 16:29:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:53,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:53,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:53,266 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:53,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 16:29:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:53,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-10-24 16:29:53,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:53,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:29:53,597 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 [2024-10-24 16:29:53,600 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 [2024-10-24 16:29:53,791 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:53,792 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 [2024-10-24 16:29:53,795 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 16 treesize of output 11 [2024-10-24 16:29:53,800 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 18 treesize of output 13 [2024-10-24 16:29:53,810 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-10-24 16:29:53,811 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 1 case distinctions, treesize of input 18 treesize of output 21 [2024-10-24 16:29:53,877 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 18 treesize of output 13 [2024-10-24 16:29:53,882 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 16 treesize of output 11 [2024-10-24 16:29:53,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:29:53,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 17 treesize of output 17 [2024-10-24 16:29:54,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:29:54,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-24 16:29:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:54,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:54,370 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1758 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1758) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (forall ((v_ArrVal_1758 (Array Int Int)) (v_ArrVal_1757 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1758) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1757) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))))) is different from false [2024-10-24 16:29:54,378 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1758 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1758) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (forall ((v_ArrVal_1758 (Array Int Int)) (v_ArrVal_1757 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1758) |c_ULTIMATE.start_main_~shared~0#1.base|) 0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1757) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))))) is different from false [2024-10-24 16:29:54,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515308677] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:54,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:54,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2024-10-24 16:29:54,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222473907] [2024-10-24 16:29:54,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:54,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-24 16:29:54,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-24 16:29:54,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1774, Unknown=2, NotChecked=170, Total=2070 [2024-10-24 16:29:54,532 INFO L87 Difference]: Start difference. First operand 154 states and 193 transitions. Second operand has 38 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 32 states have internal predecessors, (55), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:29:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:55,430 INFO L93 Difference]: Finished difference Result 157 states and 197 transitions. [2024-10-24 16:29:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 16:29:55,431 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 32 states have internal predecessors, (55), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2024-10-24 16:29:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:55,432 INFO L225 Difference]: With dead ends: 157 [2024-10-24 16:29:55,432 INFO L226 Difference]: Without dead ends: 157 [2024-10-24 16:29:55,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=199, Invalid=2777, Unknown=2, NotChecked=214, Total=3192 [2024-10-24 16:29:55,434 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:55,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 908 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 16:29:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-10-24 16:29:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2024-10-24 16:29:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 134 states have (on average 1.291044776119403) internal successors, (173), 142 states have internal predecessors, (173), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 16:29:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 193 transitions. [2024-10-24 16:29:55,438 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 193 transitions. Word has length 34 [2024-10-24 16:29:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:55,439 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 193 transitions. [2024-10-24 16:29:55,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 32 states have internal predecessors, (55), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:29:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 193 transitions. [2024-10-24 16:29:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 16:29:55,439 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:55,440 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:55,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-24 16:29:55,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:55,644 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:55,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:55,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1682461077, now seen corresponding path program 1 times [2024-10-24 16:29:55,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:55,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82987363] [2024-10-24 16:29:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:55,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:55,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:55,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:29:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:55,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:55,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82987363] [2024-10-24 16:29:55,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82987363] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:55,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856332905] [2024-10-24 16:29:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:55,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:55,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:55,997 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:55,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 16:29:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:56,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-24 16:29:56,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:56,202 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-24 16:29:56,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 20 treesize of output 27 [2024-10-24 16:29:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:29:56,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:56,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856332905] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:56,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:56,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2024-10-24 16:29:56,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328081531] [2024-10-24 16:29:56,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:56,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 16:29:56,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 16:29:56,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2024-10-24 16:29:56,781 INFO L87 Difference]: Start difference. First operand 155 states and 193 transitions. Second operand has 25 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 16:29:57,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:57,185 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2024-10-24 16:29:57,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 16:29:57,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-10-24 16:29:57,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:57,186 INFO L225 Difference]: With dead ends: 164 [2024-10-24 16:29:57,186 INFO L226 Difference]: Without dead ends: 148 [2024-10-24 16:29:57,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2024-10-24 16:29:57,187 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:57,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 362 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:29:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-10-24 16:29:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2024-10-24 16:29:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 127 states have (on average 1.2992125984251968) internal successors, (165), 135 states have internal predecessors, (165), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 16:29:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 185 transitions. [2024-10-24 16:29:57,190 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 185 transitions. Word has length 34 [2024-10-24 16:29:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:57,190 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 185 transitions. [2024-10-24 16:29:57,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 16:29:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 185 transitions. [2024-10-24 16:29:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-24 16:29:57,191 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:57,191 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:57,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-24 16:29:57,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:57,392 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:57,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash -615348344, now seen corresponding path program 1 times [2024-10-24 16:29:57,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:57,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573753191] [2024-10-24 16:29:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:57,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:57,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:57,680 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:29:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:57,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 16:29:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:57,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:57,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573753191] [2024-10-24 16:29:57,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573753191] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:57,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972507923] [2024-10-24 16:29:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:57,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:57,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:57,806 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:57,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 16:29:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:57,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-24 16:29:57,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:29:58,059 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 [2024-10-24 16:29:58,115 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 9 treesize of output 5 [2024-10-24 16:29:58,190 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:29:58,190 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 [2024-10-24 16:29:58,245 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 18 treesize of output 13 [2024-10-24 16:29:58,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:29:58,301 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 17 treesize of output 17 [2024-10-24 16:29:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:29:58,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:29:58,481 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1925 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1925) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) |c_#StackHeapBarrier|)) is different from false [2024-10-24 16:29:58,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972507923] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:58,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:29:58,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 31 [2024-10-24 16:29:58,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354116390] [2024-10-24 16:29:58,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:29:58,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-24 16:29:58,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:29:58,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-24 16:29:58,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1092, Unknown=17, NotChecked=66, Total=1260 [2024-10-24 16:29:58,545 INFO L87 Difference]: Start difference. First operand 148 states and 185 transitions. Second operand has 32 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:29:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:29:59,260 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2024-10-24 16:29:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 16:29:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2024-10-24 16:29:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:29:59,261 INFO L225 Difference]: With dead ends: 151 [2024-10-24 16:29:59,261 INFO L226 Difference]: Without dead ends: 151 [2024-10-24 16:29:59,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=2080, Unknown=18, NotChecked=92, Total=2352 [2024-10-24 16:29:59,263 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 15 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 16:29:59,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 981 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 16:29:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-10-24 16:29:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2024-10-24 16:29:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 128 states have (on average 1.296875) internal successors, (166), 136 states have internal predecessors, (166), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 16:29:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 186 transitions. [2024-10-24 16:29:59,266 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 186 transitions. Word has length 36 [2024-10-24 16:29:59,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:29:59,267 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 186 transitions. [2024-10-24 16:29:59,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:29:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 186 transitions. [2024-10-24 16:29:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-24 16:29:59,267 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:29:59,268 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:29:59,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-24 16:29:59,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:59,468 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:29:59,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:29:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1878204428, now seen corresponding path program 2 times [2024-10-24 16:29:59,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:29:59,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678495044] [2024-10-24 16:29:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:29:59,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:29:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:59,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:29:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:59,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:29:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:59,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:29:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:59,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-24 16:29:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:29:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 16:29:59,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:29:59,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678495044] [2024-10-24 16:29:59,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678495044] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:29:59,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820596575] [2024-10-24 16:29:59,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:29:59,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:29:59,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:29:59,860 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:29:59,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 16:30:00,037 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:30:00,037 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:30:00,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-10-24 16:30:00,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:30:00,046 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 [2024-10-24 16:30:00,050 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 [2024-10-24 16:30:00,251 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-24 16:30:00,251 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 [2024-10-24 16:30:00,261 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 12 treesize of output 14 [2024-10-24 16:30:00,310 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 [2024-10-24 16:30:00,328 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 [2024-10-24 16:30:00,396 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 [2024-10-24 16:30:00,405 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 15 treesize of output 7 [2024-10-24 16:30:00,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:30:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:30:00,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2024-10-24 16:30:00,536 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-10-24 16:30:00,537 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 16 treesize of output 18 [2024-10-24 16:30:00,859 INFO L349 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2024-10-24 16:30:00,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 37 [2024-10-24 16:30:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:30:01,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:30:01,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820596575] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:01,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:30:01,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 35 [2024-10-24 16:30:01,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244145688] [2024-10-24 16:30:01,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:30:01,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-24 16:30:01,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:30:01,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-24 16:30:01,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1358, Unknown=0, NotChecked=0, Total=1482 [2024-10-24 16:30:01,572 INFO L87 Difference]: Start difference. First operand 149 states and 186 transitions. Second operand has 36 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 7 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 16:30:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:30:02,379 INFO L93 Difference]: Finished difference Result 153 states and 186 transitions. [2024-10-24 16:30:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 16:30:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 7 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 37 [2024-10-24 16:30:02,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:30:02,382 INFO L225 Difference]: With dead ends: 153 [2024-10-24 16:30:02,382 INFO L226 Difference]: Without dead ends: 153 [2024-10-24 16:30:02,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=2072, Unknown=0, NotChecked=0, Total=2256 [2024-10-24 16:30:02,384 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 25 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 16:30:02,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 701 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 16:30:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-24 16:30:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 127. [2024-10-24 16:30:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 108 states have (on average 1.2777777777777777) internal successors, (138), 116 states have internal predecessors, (138), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-24 16:30:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 154 transitions. [2024-10-24 16:30:02,391 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 154 transitions. Word has length 37 [2024-10-24 16:30:02,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:30:02,391 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 154 transitions. [2024-10-24 16:30:02,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 7 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 16:30:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 154 transitions. [2024-10-24 16:30:02,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-24 16:30:02,395 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:30:02,395 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:30:02,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-24 16:30:02,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:30:02,596 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:30:02,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:30:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash -147812386, now seen corresponding path program 1 times [2024-10-24 16:30:02,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:30:02,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290824762] [2024-10-24 16:30:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:30:02,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:30:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:03,060 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:30:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:03,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:30:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:03,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-24 16:30:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:30:03,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:30:03,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290824762] [2024-10-24 16:30:03,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290824762] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:03,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924029293] [2024-10-24 16:30:03,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:30:03,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:30:03,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:30:03,500 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:30:03,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 16:30:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:03,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-10-24 16:30:03,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:30:03,693 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 [2024-10-24 16:30:03,726 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 [2024-10-24 16:30:03,731 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 [2024-10-24 16:30:04,012 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 16:30:04,012 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-10-24 16:30:04,030 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-24 16:30:04,031 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 [2024-10-24 16:30:04,035 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 16 treesize of output 11 [2024-10-24 16:30:04,103 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 16 treesize of output 11 [2024-10-24 16:30:04,108 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 16 treesize of output 11 [2024-10-24 16:30:04,185 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:30:04,185 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 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 16:30:08,194 WARN L851 $PredicateComparison]: unable to prove that (and (or (= (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (exists ((|v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| |c_#memory_$Pointer$#0.base|))) (and (= (store |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| .cse0 (select |c_#memory_$Pointer$#0.base| .cse0)) |c_#memory_$Pointer$#0.base|) (= (select (select |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (= .cse0 |c_ULTIMATE.start_create_#t~ret11#1.base|))))) (not (= |c_ULTIMATE.start_main_~shared~0#1.base| |c_ULTIMATE.start_create_~now~1#1.base|)) (not (= |c_ULTIMATE.start_create_#t~ret11#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|)) (= (select (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) is different from false [2024-10-24 16:30:08,196 WARN L873 $PredicateComparison]: unable to prove that (and (or (= (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (exists ((|v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| |c_#memory_$Pointer$#0.base|))) (and (= (store |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| .cse0 (select |c_#memory_$Pointer$#0.base| .cse0)) |c_#memory_$Pointer$#0.base|) (= (select (select |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (= .cse0 |c_ULTIMATE.start_create_#t~ret11#1.base|))))) (not (= |c_ULTIMATE.start_main_~shared~0#1.base| |c_ULTIMATE.start_create_~now~1#1.base|)) (not (= |c_ULTIMATE.start_create_#t~ret11#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|)) (= (select (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) is different from true [2024-10-24 16:30:08,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2024-10-24 16:30:08,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 16:30:08,319 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-10-24 16:30:08,320 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 48 treesize of output 52 [2024-10-24 16:30:08,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 11 [2024-10-24 16:30:08,329 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 12 treesize of output 8 [2024-10-24 16:30:08,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:30:08,408 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 [2024-10-24 16:30:08,414 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:30:08,414 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 [2024-10-24 16:30:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:30:08,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:30:08,530 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2170 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_2170) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_2171 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_2171) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) is different from false [2024-10-24 16:30:08,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924029293] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:08,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:30:08,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 37 [2024-10-24 16:30:08,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203392401] [2024-10-24 16:30:08,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:30:08,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-24 16:30:08,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:30:08,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-24 16:30:08,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1415, Unknown=45, NotChecked=154, Total=1722 [2024-10-24 16:30:08,794 INFO L87 Difference]: Start difference. First operand 127 states and 154 transitions. Second operand has 37 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:30:09,232 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|))) (let ((.cse1 (= (select .cse3 0) 0)) (.cse0 (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|))) (and (= (select .cse0 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (or .cse1 (exists ((|v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| (Array Int (Array Int Int)))) (let ((.cse2 (@diff |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| |c_#memory_$Pointer$#0.base|))) (and (= (store |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| .cse2 (select |c_#memory_$Pointer$#0.base| .cse2)) |c_#memory_$Pointer$#0.base|) (= (select (select |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (= .cse2 |c_ULTIMATE.start_create_#t~ret11#1.base|))))) .cse1 (= (select .cse3 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (not (= |c_ULTIMATE.start_main_~shared~0#1.base| |c_ULTIMATE.start_create_~now~1#1.base|)) (not (= |c_ULTIMATE.start_create_#t~ret11#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|)) (= (select .cse0 0) 0) (= (select |c_#valid| |c_ULTIMATE.start_main_~shared~0#1.base|) 1)))) is different from false [2024-10-24 16:30:09,234 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|))) (let ((.cse1 (= (select .cse3 0) 0)) (.cse0 (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|))) (and (= (select .cse0 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (or .cse1 (exists ((|v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| (Array Int (Array Int Int)))) (let ((.cse2 (@diff |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| |c_#memory_$Pointer$#0.base|))) (and (= (store |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| .cse2 (select |c_#memory_$Pointer$#0.base| .cse2)) |c_#memory_$Pointer$#0.base|) (= (select (select |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_54| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (= .cse2 |c_ULTIMATE.start_create_#t~ret11#1.base|))))) .cse1 (= (select .cse3 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (not (= |c_ULTIMATE.start_main_~shared~0#1.base| |c_ULTIMATE.start_create_~now~1#1.base|)) (not (= |c_ULTIMATE.start_create_#t~ret11#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|)) (= (select .cse0 0) 0) (= (select |c_#valid| |c_ULTIMATE.start_main_~shared~0#1.base|) 1)))) is different from true [2024-10-24 16:30:09,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:30:09,625 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2024-10-24 16:30:09,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 16:30:09,625 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2024-10-24 16:30:09,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:30:09,626 INFO L225 Difference]: With dead ends: 142 [2024-10-24 16:30:09,626 INFO L226 Difference]: Without dead ends: 142 [2024-10-24 16:30:09,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=191, Invalid=2422, Unknown=51, NotChecked=306, Total=2970 [2024-10-24 16:30:09,627 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 10 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 16:30:09,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 638 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 968 Invalid, 0 Unknown, 116 Unchecked, 0.5s Time] [2024-10-24 16:30:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-10-24 16:30:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2024-10-24 16:30:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 121 states have (on average 1.256198347107438) internal successors, (152), 129 states have internal predecessors, (152), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-24 16:30:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 170 transitions. [2024-10-24 16:30:09,633 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 170 transitions. Word has length 37 [2024-10-24 16:30:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:30:09,633 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 170 transitions. [2024-10-24 16:30:09,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:30:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 170 transitions. [2024-10-24 16:30:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-24 16:30:09,634 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:30:09,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:30:09,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-24 16:30:09,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:30:09,839 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:30:09,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:30:09,839 INFO L85 PathProgramCache]: Analyzing trace with hash -313826801, now seen corresponding path program 1 times [2024-10-24 16:30:09,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:30:09,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506921541] [2024-10-24 16:30:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:30:09,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:30:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:09,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:30:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:09,996 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 16:30:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:10,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-24 16:30:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:30:10,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:30:10,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506921541] [2024-10-24 16:30:10,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506921541] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:10,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485727436] [2024-10-24 16:30:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:30:10,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:30:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:30:10,044 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:30:10,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-24 16:30:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:10,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-24 16:30:10,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:30:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:30:10,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:30:10,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:30:10,403 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 [2024-10-24 16:30:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 16:30:10,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485727436] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:30:10,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:30:10,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2024-10-24 16:30:10,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921922585] [2024-10-24 16:30:10,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:30:10,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 16:30:10,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:30:10,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 16:30:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-10-24 16:30:10,473 INFO L87 Difference]: Start difference. First operand 141 states and 170 transitions. Second operand has 16 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-24 16:30:10,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:30:10,613 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2024-10-24 16:30:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 16:30:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2024-10-24 16:30:10,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:30:10,614 INFO L225 Difference]: With dead ends: 155 [2024-10-24 16:30:10,614 INFO L226 Difference]: Without dead ends: 155 [2024-10-24 16:30:10,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-10-24 16:30:10,615 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 16 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:30:10,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 289 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:30:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-10-24 16:30:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 150. [2024-10-24 16:30:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 130 states have (on average 1.2769230769230768) internal successors, (166), 138 states have internal predecessors, (166), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-24 16:30:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2024-10-24 16:30:10,623 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 39 [2024-10-24 16:30:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:30:10,623 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2024-10-24 16:30:10,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-24 16:30:10,626 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2024-10-24 16:30:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-24 16:30:10,626 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:30:10,626 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:30:10,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-24 16:30:10,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-24 16:30:10,827 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:30:10,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:30:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash -921973961, now seen corresponding path program 2 times [2024-10-24 16:30:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:30:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62576448] [2024-10-24 16:30:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:30:10,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:30:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:11,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:30:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:11,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:30:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:11,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 16:30:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:30:11,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:30:11,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62576448] [2024-10-24 16:30:11,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62576448] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:11,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256938183] [2024-10-24 16:30:11,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:30:11,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:30:11,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:30:11,600 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:30:11,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-24 16:30:11,777 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:30:11,777 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:30:11,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-10-24 16:30:11,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:30:11,784 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 [2024-10-24 16:30:11,888 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 [2024-10-24 16:30:11,893 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 [2024-10-24 16:30:11,937 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-24 16:30:11,937 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 [2024-10-24 16:30:11,987 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 20 treesize of output 15 [2024-10-24 16:30:11,992 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 [2024-10-24 16:30:12,295 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-10-24 16:30:12,295 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 20 treesize of output 22 [2024-10-24 16:30:12,506 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-10-24 16:30:12,507 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 47 treesize of output 42 [2024-10-24 16:30:12,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-10-24 16:30:12,922 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 16:30:12,923 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 16:30:12,937 INFO L349 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2024-10-24 16:30:12,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 42 [2024-10-24 16:30:12,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:30:12,945 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 [2024-10-24 16:30:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:30:12,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:30:13,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256938183] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:13,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:30:13,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 41 [2024-10-24 16:30:13,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357904116] [2024-10-24 16:30:13,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:30:13,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-24 16:30:13,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:30:13,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-24 16:30:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2214, Unknown=2, NotChecked=0, Total=2352 [2024-10-24 16:30:13,429 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 41 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 33 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 16:30:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:30:14,641 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2024-10-24 16:30:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 16:30:14,642 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 33 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 39 [2024-10-24 16:30:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:30:14,643 INFO L225 Difference]: With dead ends: 154 [2024-10-24 16:30:14,643 INFO L226 Difference]: Without dead ends: 154 [2024-10-24 16:30:14,644 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=208, Invalid=3212, Unknown=2, NotChecked=0, Total=3422 [2024-10-24 16:30:14,644 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-24 16:30:14,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1036 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-24 16:30:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-10-24 16:30:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2024-10-24 16:30:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 132 states have (on average 1.2727272727272727) internal successors, (168), 140 states have internal predecessors, (168), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-24 16:30:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 186 transitions. [2024-10-24 16:30:14,650 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 186 transitions. Word has length 39 [2024-10-24 16:30:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:30:14,651 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 186 transitions. [2024-10-24 16:30:14,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 33 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 16:30:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 186 transitions. [2024-10-24 16:30:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-24 16:30:14,652 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:30:14,652 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:30:14,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-24 16:30:14,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-10-24 16:30:14,853 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:30:14,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:30:14,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1253758169, now seen corresponding path program 1 times [2024-10-24 16:30:14,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:30:14,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945143223] [2024-10-24 16:30:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:30:14,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:30:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:15,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:30:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:15,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:30:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:15,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 16:30:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:30:15,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:30:15,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945143223] [2024-10-24 16:30:15,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945143223] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:15,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717921036] [2024-10-24 16:30:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:30:15,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:30:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:30:15,297 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:30:15,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-24 16:30:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:15,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-24 16:30:15,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:30:15,549 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 [2024-10-24 16:30:15,599 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 [2024-10-24 16:30:15,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:30:15,774 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 18 treesize of output 13 [2024-10-24 16:30:15,787 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2024-10-24 16:30:15,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2024-10-24 16:30:15,857 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 17 treesize of output 12 [2024-10-24 16:30:15,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:30:15,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 16 treesize of output 16 [2024-10-24 16:30:15,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2024-10-24 16:30:16,004 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 [2024-10-24 16:30:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:30:16,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:30:16,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:30:16,119 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 28 treesize of output 32 [2024-10-24 16:30:16,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717921036] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:16,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:30:16,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 35 [2024-10-24 16:30:16,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791128538] [2024-10-24 16:30:16,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:30:16,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-24 16:30:16,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:30:16,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-24 16:30:16,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1312, Unknown=0, NotChecked=0, Total=1406 [2024-10-24 16:30:16,255 INFO L87 Difference]: Start difference. First operand 152 states and 186 transitions. Second operand has 36 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:30:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:30:17,015 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2024-10-24 16:30:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 16:30:17,016 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2024-10-24 16:30:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:30:17,018 INFO L225 Difference]: With dead ends: 160 [2024-10-24 16:30:17,018 INFO L226 Difference]: Without dead ends: 160 [2024-10-24 16:30:17,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2024-10-24 16:30:17,019 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 19 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 16:30:17,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 861 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 16:30:17,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-24 16:30:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2024-10-24 16:30:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 132 states have (on average 1.2727272727272727) internal successors, (168), 140 states have internal predecessors, (168), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-24 16:30:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 186 transitions. [2024-10-24 16:30:17,025 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 186 transitions. Word has length 41 [2024-10-24 16:30:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:30:17,025 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 186 transitions. [2024-10-24 16:30:17,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 16:30:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 186 transitions. [2024-10-24 16:30:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-24 16:30:17,026 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:30:17,026 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:30:17,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-24 16:30:17,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-24 16:30:17,227 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:30:17,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:30:17,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1311723502, now seen corresponding path program 3 times [2024-10-24 16:30:17,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:30:17,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146370087] [2024-10-24 16:30:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:30:17,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:30:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:17,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:30:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:17,995 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:30:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:18,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:30:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:18,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-24 16:30:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 16:30:18,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:30:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146370087] [2024-10-24 16:30:18,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146370087] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117969413] [2024-10-24 16:30:18,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:30:18,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:30:18,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:30:18,339 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:30:18,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-24 16:30:18,541 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 16:30:18,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:30:18,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-10-24 16:30:18,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:30:18,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-24 16:30:18,695 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:30:18,695 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 [2024-10-24 16:30:18,726 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 [2024-10-24 16:30:18,872 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_alloc_and_zero_internal_~pi~1.base_75 Int)) (and (= |c_#valid| (store |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_75 (select |c_#valid| v_alloc_and_zero_internal_~pi~1.base_75))) (= (select |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_75) 0) (= |c_#memory_$Pointer$#0.base| (store |c_old(#memory_$Pointer$#0.base)| v_alloc_and_zero_internal_~pi~1.base_75 (select |c_#memory_$Pointer$#0.base| v_alloc_and_zero_internal_~pi~1.base_75))))) is different from true [2024-10-24 16:30:18,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:30:18,876 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 17 [2024-10-24 16:30:18,893 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-24 16:30:18,893 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 [2024-10-24 16:30:18,904 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-24 16:30:18,904 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 [2024-10-24 16:30:19,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:30:19,089 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 26 treesize of output 19 [2024-10-24 16:30:19,109 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2024-10-24 16:30:19,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2024-10-24 16:30:19,201 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 34 treesize of output 25 [2024-10-24 16:30:19,333 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 33 treesize of output 17 [2024-10-24 16:30:19,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-24 16:30:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-10-24 16:30:19,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:30:19,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117969413] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:19,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 16:30:19,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2024-10-24 16:30:19,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179870181] [2024-10-24 16:30:19,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 16:30:19,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-10-24 16:30:19,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:30:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-10-24 16:30:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3114, Unknown=5, NotChecked=112, Total=3422 [2024-10-24 16:30:19,874 INFO L87 Difference]: Start difference. First operand 152 states and 186 transitions. Second operand has 52 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 7 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 16:30:21,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:30:21,203 INFO L93 Difference]: Finished difference Result 181 states and 224 transitions. [2024-10-24 16:30:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 16:30:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 7 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2024-10-24 16:30:21,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:30:21,204 INFO L225 Difference]: With dead ends: 181 [2024-10-24 16:30:21,204 INFO L226 Difference]: Without dead ends: 181 [2024-10-24 16:30:21,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=285, Invalid=4544, Unknown=5, NotChecked=136, Total=4970 [2024-10-24 16:30:21,206 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 22 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-24 16:30:21,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1078 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1758 Invalid, 0 Unknown, 103 Unchecked, 0.9s Time] [2024-10-24 16:30:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-10-24 16:30:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 171. [2024-10-24 16:30:21,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 149 states have (on average 1.2684563758389262) internal successors, (189), 157 states have internal predecessors, (189), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-24 16:30:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 211 transitions. [2024-10-24 16:30:21,210 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 211 transitions. Word has length 42 [2024-10-24 16:30:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:30:21,210 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 211 transitions. [2024-10-24 16:30:21,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 7 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 16:30:21,211 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 211 transitions. [2024-10-24 16:30:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-24 16:30:21,211 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:30:21,211 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:30:21,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-24 16:30:21,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:30:21,412 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-24 16:30:21,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:30:21,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1311723501, now seen corresponding path program 2 times [2024-10-24 16:30:21,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:30:21,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120860906] [2024-10-24 16:30:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:30:21,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:30:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:21,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 16:30:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:21,988 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 16:30:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:22,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-24 16:30:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:22,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-24 16:30:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:30:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 16:30:22,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:30:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120860906] [2024-10-24 16:30:22,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120860906] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:30:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098704717] [2024-10-24 16:30:22,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:30:22,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:30:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:30:22,383 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:30:22,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-24 16:30:22,571 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:30:22,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:30:22,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-10-24 16:30:22,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:30:22,581 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 [2024-10-24 16:30:22,683 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 [2024-10-24 16:30:22,754 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 16:30:22,754 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 [2024-10-24 16:30:22,790 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 [2024-10-24 16:30:22,795 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