./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/dll-backwards.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/dll-backwards.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 c60e32c20f00ce4bcc840493e283bd0e8c8c7f70f8b1b7ef734d9ded702e93b8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 18:07:27,303 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 18:07:27,373 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-10-11 18:07:27,380 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 18:07:27,381 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 18:07:27,402 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 18:07:27,402 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 18:07:27,402 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 18:07:27,403 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 18:07:27,403 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 18:07:27,404 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 18:07:27,404 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 18:07:27,406 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 18:07:27,410 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 18:07:27,410 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 18:07:27,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 18:07:27,410 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 18:07:27,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 18:07:27,411 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 18:07:27,411 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 18:07:27,411 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 18:07:27,413 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 18:07:27,413 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 18:07:27,413 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 18:07:27,414 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 18:07:27,414 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 18:07:27,414 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 18:07:27,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 18:07:27,415 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 18:07:27,415 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 18:07:27,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 18:07:27,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 18:07:27,415 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 18:07:27,415 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 18:07:27,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 18:07:27,416 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 18:07:27,416 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 18:07:27,416 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 18:07:27,416 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 18:07:27,417 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c60e32c20f00ce4bcc840493e283bd0e8c8c7f70f8b1b7ef734d9ded702e93b8 [2024-10-11 18:07:27,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 18:07:27,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 18:07:27,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 18:07:27,671 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 18:07:27,671 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 18:07:27,672 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/dll-backwards.i [2024-10-11 18:07:29,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 18:07:29,423 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 18:07:29,424 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/dll-backwards.i [2024-10-11 18:07:29,456 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/79aa3c251/044fd9dad0d945d2ba34341f081c88fa/FLAG5c0de1bf8 [2024-10-11 18:07:29,706 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/79aa3c251/044fd9dad0d945d2ba34341f081c88fa [2024-10-11 18:07:29,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 18:07:29,711 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 18:07:29,714 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 18:07:29,714 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 18:07:29,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 18:07:29,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:07:29" (1/1) ... [2024-10-11 18:07:29,724 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5faed81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:29, skipping insertion in model container [2024-10-11 18:07:29,724 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:07:29" (1/1) ... [2024-10-11 18:07:29,795 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 18:07:30,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 18:07:30,091 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 18:07:30,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 18:07:30,177 INFO L204 MainTranslator]: Completed translation [2024-10-11 18:07:30,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30 WrapperNode [2024-10-11 18:07:30,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 18:07:30,179 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 18:07:30,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 18:07:30,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 18:07:30,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,198 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,224 INFO L138 Inliner]: procedures = 119, calls = 19, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 73 [2024-10-11 18:07:30,225 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 18:07:30,226 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 18:07:30,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 18:07:30,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 18:07:30,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,242 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,273 INFO L175 MemorySlicer]: Split 9 memory accesses to 1 slices as follows [9]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 4 writes are split as follows [4]. [2024-10-11 18:07:30,273 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,274 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,284 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,290 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,293 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,295 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 18:07:30,301 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 18:07:30,305 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 18:07:30,305 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 18:07:30,306 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (1/1) ... [2024-10-11 18:07:30,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 18:07:30,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:30,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 18:07:30,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 18:07:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-10-11 18:07:30,396 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-10-11 18:07:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 18:07:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-11 18:07:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-11 18:07:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 18:07:30,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 18:07:30,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 18:07:30,523 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 18:07:30,525 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 18:07:30,747 INFO L? ?]: Removed 75 outVars from TransFormulas that were not future-live. [2024-10-11 18:07:30,748 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 18:07:30,798 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 18:07:30,798 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 18:07:30,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:07:30 BoogieIcfgContainer [2024-10-11 18:07:30,799 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 18:07:30,801 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 18:07:30,801 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 18:07:30,806 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 18:07:30,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 06:07:29" (1/3) ... [2024-10-11 18:07:30,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d23108f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:07:30, skipping insertion in model container [2024-10-11 18:07:30,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:07:30" (2/3) ... [2024-10-11 18:07:30,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d23108f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:07:30, skipping insertion in model container [2024-10-11 18:07:30,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:07:30" (3/3) ... [2024-10-11 18:07:30,809 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-backwards.i [2024-10-11 18:07:30,827 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 18:07:30,827 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-11 18:07:30,878 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 18:07:30,886 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;@2eeb51ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 18:07:30,887 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-10-11 18:07:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 25 states have (on average 2.2) internal successors, (55), 47 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:07:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-11 18:07:30,899 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:30,900 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-11 18:07:30,902 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:30,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:30,909 INFO L85 PathProgramCache]: Analyzing trace with hash 4543610, now seen corresponding path program 1 times [2024-10-11 18:07:30,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:30,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386496147] [2024-10-11 18:07:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:30,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386496147] [2024-10-11 18:07:31,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386496147] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:31,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:31,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 18:07:31,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8934613] [2024-10-11 18:07:31,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:31,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 18:07:31,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:31,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 18:07:31,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:07:31,187 INFO L87 Difference]: Start difference. First operand has 51 states, 25 states have (on average 2.2) internal successors, (55), 47 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:07:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:31,270 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2024-10-11 18:07:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 18:07:31,273 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 [2024-10-11 18:07:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:31,280 INFO L225 Difference]: With dead ends: 49 [2024-10-11 18:07:31,281 INFO L226 Difference]: Without dead ends: 48 [2024-10-11 18:07:31,283 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 [2024-10-11 18:07:31,289 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:31,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:31,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-11 18:07:31,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-11 18:07:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 25 states have (on average 1.92) internal successors, (48), 44 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:07:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-10-11 18:07:31,331 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 4 [2024-10-11 18:07:31,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:31,331 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-10-11 18:07:31,331 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) [2024-10-11 18:07:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-10-11 18:07:31,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-11 18:07:31,332 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:31,332 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-11 18:07:31,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 18:07:31,332 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:31,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:31,333 INFO L85 PathProgramCache]: Analyzing trace with hash 4543611, now seen corresponding path program 1 times [2024-10-11 18:07:31,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:31,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401994701] [2024-10-11 18:07:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:31,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:31,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:31,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401994701] [2024-10-11 18:07:31,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401994701] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:31,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:31,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 18:07:31,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547595970] [2024-10-11 18:07:31,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:31,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 18:07:31,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:31,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 18:07:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:07:31,464 INFO L87 Difference]: Start difference. First operand 48 states and 52 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) [2024-10-11 18:07:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:31,529 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2024-10-11 18:07:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 18:07:31,530 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 [2024-10-11 18:07:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:31,531 INFO L225 Difference]: With dead ends: 46 [2024-10-11 18:07:31,531 INFO L226 Difference]: Without dead ends: 46 [2024-10-11 18:07:31,532 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 [2024-10-11 18:07:31,533 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:31,534 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 69 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:31,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-11 18:07:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-11 18:07:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.84) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:07:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-10-11 18:07:31,540 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 4 [2024-10-11 18:07:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:31,540 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-10-11 18:07:31,540 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) [2024-10-11 18:07:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-10-11 18:07:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 18:07:31,541 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:31,542 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:31,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 18:07:31,542 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:31,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1597871579, now seen corresponding path program 1 times [2024-10-11 18:07:31,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:31,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521695327] [2024-10-11 18:07:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:31,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:31,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:31,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:31,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521695327] [2024-10-11 18:07:31,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521695327] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:31,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:31,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 18:07:31,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795861364] [2024-10-11 18:07:31,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:31,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 18:07:31,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:31,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 18:07:31,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:07:31,847 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:32,021 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2024-10-11 18:07:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 18:07:32,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-10-11 18:07:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:32,024 INFO L225 Difference]: With dead ends: 51 [2024-10-11 18:07:32,024 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 18:07:32,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:07:32,026 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:32,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 159 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 18:07:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 18:07:32,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-10-11 18:07:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.793103448275862) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:07:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2024-10-11 18:07:32,035 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 11 [2024-10-11 18:07:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:32,035 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2024-10-11 18:07:32,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2024-10-11 18:07:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 18:07:32,036 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:32,036 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:32,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 18:07:32,037 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:32,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:32,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1597871580, now seen corresponding path program 1 times [2024-10-11 18:07:32,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:32,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223241256] [2024-10-11 18:07:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:32,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:32,218 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:32,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:32,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223241256] [2024-10-11 18:07:32,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223241256] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:32,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:32,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 18:07:32,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560374950] [2024-10-11 18:07:32,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:32,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 18:07:32,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:32,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 18:07:32,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:07:32,349 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:32,490 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2024-10-11 18:07:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 18:07:32,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-10-11 18:07:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:32,492 INFO L225 Difference]: With dead ends: 53 [2024-10-11 18:07:32,492 INFO L226 Difference]: Without dead ends: 53 [2024-10-11 18:07:32,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:07:32,494 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:32,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 180 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-11 18:07:32,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2024-10-11 18:07:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 46 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:07:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-10-11 18:07:32,506 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 11 [2024-10-11 18:07:32,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:32,506 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-10-11 18:07:32,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-10-11 18:07:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-11 18:07:32,510 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:32,510 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:32,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 18:07:32,510 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:32,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:32,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2043633508, now seen corresponding path program 1 times [2024-10-11 18:07:32,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:32,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537393970] [2024-10-11 18:07:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:32,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:32,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:32,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:32,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537393970] [2024-10-11 18:07:32,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537393970] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:32,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:32,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 18:07:32,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168847883] [2024-10-11 18:07:32,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:32,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 18:07:32,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:32,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 18:07:32,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:07:32,816 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:32,950 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2024-10-11 18:07:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 18:07:32,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-11 18:07:32,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:32,951 INFO L225 Difference]: With dead ends: 53 [2024-10-11 18:07:32,951 INFO L226 Difference]: Without dead ends: 53 [2024-10-11 18:07:32,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:07:32,953 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:32,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 245 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-11 18:07:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-10-11 18:07:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 47 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:07:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-10-11 18:07:32,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 13 [2024-10-11 18:07:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:32,958 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-10-11 18:07:32,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-10-11 18:07:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 18:07:32,959 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:32,959 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:32,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 18:07:32,959 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:32,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash 413516713, now seen corresponding path program 1 times [2024-10-11 18:07:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:32,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412486588] [2024-10-11 18:07:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:33,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:33,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:33,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:33,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412486588] [2024-10-11 18:07:33,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412486588] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517116420] [2024-10-11 18:07:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:33,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:33,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:33,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:33,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 18:07:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:33,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 18:07:33,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:33,360 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 [2024-10-11 18:07:33,436 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 [2024-10-11 18:07:33,503 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-11 18:07:33,504 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 [2024-10-11 18:07:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-10-11 18:07:33,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:33,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517116420] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:33,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:07:33,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2024-10-11 18:07:33,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677123272] [2024-10-11 18:07:33,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:33,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 18:07:33,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 18:07:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2024-10-11 18:07:33,605 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 18:07:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:33,819 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2024-10-11 18:07:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:07:33,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2024-10-11 18:07:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:33,821 INFO L225 Difference]: With dead ends: 51 [2024-10-11 18:07:33,821 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 18:07:33,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=124, Unknown=1, NotChecked=22, Total=182 [2024-10-11 18:07:33,822 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:33,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 161 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 207 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2024-10-11 18:07:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 18:07:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-10-11 18:07:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 46 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-10-11 18:07:33,828 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 15 [2024-10-11 18:07:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:33,828 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-10-11 18:07:33,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 18:07:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-10-11 18:07:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 18:07:33,829 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:33,830 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:33,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 18:07:34,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:34,037 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:34,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:34,038 INFO L85 PathProgramCache]: Analyzing trace with hash 413516714, now seen corresponding path program 1 times [2024-10-11 18:07:34,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:34,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502678192] [2024-10-11 18:07:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:34,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:34,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:34,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:34,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502678192] [2024-10-11 18:07:34,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502678192] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836749122] [2024-10-11 18:07:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:34,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:34,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:34,408 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:34,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 18:07:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:34,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 18:07:34,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:34,504 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 [2024-10-11 18:07:34,508 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 [2024-10-11 18:07:34,634 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 [2024-10-11 18:07:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:07:34,664 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 [2024-10-11 18:07:34,673 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 18:07:34,674 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 [2024-10-11 18:07:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-10-11 18:07:34,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:34,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836749122] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:34,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:07:34,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2024-10-11 18:07:34,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438844689] [2024-10-11 18:07:34,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:34,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 18:07:34,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 18:07:34,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2024-10-11 18:07:34,812 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 18:07:35,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:35,051 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2024-10-11 18:07:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 18:07:35,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2024-10-11 18:07:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:35,052 INFO L225 Difference]: With dead ends: 56 [2024-10-11 18:07:35,052 INFO L226 Difference]: Without dead ends: 56 [2024-10-11 18:07:35,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=224, Unknown=1, NotChecked=30, Total=306 [2024-10-11 18:07:35,054 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:35,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 199 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2024-10-11 18:07:35,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-11 18:07:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-10-11 18:07:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:35,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-10-11 18:07:35,058 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 15 [2024-10-11 18:07:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:35,058 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-10-11 18:07:35,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 18:07:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-10-11 18:07:35,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 18:07:35,059 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:35,059 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:35,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 18:07:35,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:35,264 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:35,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:35,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1131737851, now seen corresponding path program 1 times [2024-10-11 18:07:35,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:35,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880287397] [2024-10-11 18:07:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:35,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:35,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:35,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:35,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880287397] [2024-10-11 18:07:35,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880287397] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:35,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:35,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 18:07:35,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824315966] [2024-10-11 18:07:35,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:35,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 18:07:35,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:35,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 18:07:35,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:07:35,374 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:35,504 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-10-11 18:07:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 18:07:35,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-10-11 18:07:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:35,506 INFO L225 Difference]: With dead ends: 56 [2024-10-11 18:07:35,506 INFO L226 Difference]: Without dead ends: 56 [2024-10-11 18:07:35,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:07:35,507 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:35,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 161 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:35,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-11 18:07:35,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-10-11 18:07:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2024-10-11 18:07:35,512 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 15 [2024-10-11 18:07:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:35,512 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2024-10-11 18:07:35,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2024-10-11 18:07:35,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 18:07:35,514 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:35,514 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:35,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 18:07:35,514 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:35,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:35,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1131737850, now seen corresponding path program 1 times [2024-10-11 18:07:35,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:35,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027284677] [2024-10-11 18:07:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:35,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:35,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:35,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:35,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027284677] [2024-10-11 18:07:35,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027284677] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:35,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:35,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 18:07:35,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372828749] [2024-10-11 18:07:35,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:35,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 18:07:35,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 18:07:35,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:07:35,731 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:35,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:35,888 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2024-10-11 18:07:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 18:07:35,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-10-11 18:07:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:35,890 INFO L225 Difference]: With dead ends: 59 [2024-10-11 18:07:35,890 INFO L226 Difference]: Without dead ends: 59 [2024-10-11 18:07:35,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:07:35,892 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:35,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 174 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-11 18:07:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-11 18:07:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.641025641025641) internal successors, (64), 54 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-10-11 18:07:35,900 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 15 [2024-10-11 18:07:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:35,900 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-10-11 18:07:35,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-10-11 18:07:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 18:07:35,901 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:35,901 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:35,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 18:07:35,902 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:35,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2042304147, now seen corresponding path program 1 times [2024-10-11 18:07:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:35,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724046575] [2024-10-11 18:07:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:35,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:35,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:36,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 18:07:36,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:36,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724046575] [2024-10-11 18:07:36,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724046575] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:36,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:36,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 18:07:36,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353274011] [2024-10-11 18:07:36,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:36,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 18:07:36,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:36,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 18:07:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:07:36,041 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:07:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:36,147 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-10-11 18:07:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 18:07:36,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-10-11 18:07:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:36,148 INFO L225 Difference]: With dead ends: 58 [2024-10-11 18:07:36,148 INFO L226 Difference]: Without dead ends: 58 [2024-10-11 18:07:36,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:07:36,149 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:36,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 153 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-11 18:07:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-11 18:07:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 53 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-10-11 18:07:36,157 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 17 [2024-10-11 18:07:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:36,157 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-10-11 18:07:36,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:07:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-10-11 18:07:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 18:07:36,158 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:36,158 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:36,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 18:07:36,159 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:36,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2042304146, now seen corresponding path program 1 times [2024-10-11 18:07:36,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:36,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090361169] [2024-10-11 18:07:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:36,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:36,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:36,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:36,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:36,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090361169] [2024-10-11 18:07:36,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090361169] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:36,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:36,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 18:07:36,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860143566] [2024-10-11 18:07:36,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:36,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 18:07:36,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:36,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 18:07:36,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:07:36,397 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:07:36,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:36,501 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2024-10-11 18:07:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 18:07:36,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-10-11 18:07:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:36,502 INFO L225 Difference]: With dead ends: 57 [2024-10-11 18:07:36,502 INFO L226 Difference]: Without dead ends: 57 [2024-10-11 18:07:36,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:07:36,503 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:36,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 169 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:36,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-11 18:07:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-10-11 18:07:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 52 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2024-10-11 18:07:36,507 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 17 [2024-10-11 18:07:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:36,507 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2024-10-11 18:07:36,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:07:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2024-10-11 18:07:36,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 18:07:36,510 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:36,510 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:36,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 18:07:36,510 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:36,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:36,513 INFO L85 PathProgramCache]: Analyzing trace with hash -973399857, now seen corresponding path program 1 times [2024-10-11 18:07:36,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:36,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635408582] [2024-10-11 18:07:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:36,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:36,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:36,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:36,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635408582] [2024-10-11 18:07:36,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635408582] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:36,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:36,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 18:07:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288670223] [2024-10-11 18:07:36,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:36,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 18:07:36,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 18:07:36,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:07:36,632 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:36,730 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-10-11 18:07:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 18:07:36,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-10-11 18:07:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:36,732 INFO L225 Difference]: With dead ends: 62 [2024-10-11 18:07:36,732 INFO L226 Difference]: Without dead ends: 62 [2024-10-11 18:07:36,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:07:36,733 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:36,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 211 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-11 18:07:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-10-11 18:07:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2024-10-11 18:07:36,740 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 17 [2024-10-11 18:07:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:36,740 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2024-10-11 18:07:36,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2024-10-11 18:07:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 18:07:36,741 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:36,741 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:36,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 18:07:36,745 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:36,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash -973307184, now seen corresponding path program 1 times [2024-10-11 18:07:36,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:36,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977623071] [2024-10-11 18:07:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:36,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:36,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:37,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:37,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977623071] [2024-10-11 18:07:37,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977623071] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:37,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987744208] [2024-10-11 18:07:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:37,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:37,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:37,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:37,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 18:07:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:37,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 18:07:37,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:37,142 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 [2024-10-11 18:07:37,146 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 [2024-10-11 18:07:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:37,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:37,788 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 43 treesize of output 41 [2024-10-11 18:07:37,795 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 41 treesize of output 39 [2024-10-11 18:07:37,800 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 42 treesize of output 38 [2024-10-11 18:07:37,813 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 36 treesize of output 32 [2024-10-11 18:07:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:37,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987744208] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:07:37,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:07:37,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-10-11 18:07:37,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327250096] [2024-10-11 18:07:37,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:37,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 18:07:37,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 18:07:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-10-11 18:07:37,853 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 18:07:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:38,055 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2024-10-11 18:07:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:07:38,056 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2024-10-11 18:07:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:38,056 INFO L225 Difference]: With dead ends: 62 [2024-10-11 18:07:38,056 INFO L226 Difference]: Without dead ends: 62 [2024-10-11 18:07:38,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-10-11 18:07:38,058 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:38,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 395 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 18:07:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-11 18:07:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-11 18:07:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 57 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2024-10-11 18:07:38,061 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 17 [2024-10-11 18:07:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:38,063 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2024-10-11 18:07:38,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 18:07:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2024-10-11 18:07:38,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 18:07:38,063 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:38,063 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:38,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 18:07:38,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:38,264 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:38,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash 954615770, now seen corresponding path program 1 times [2024-10-11 18:07:38,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:38,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167833649] [2024-10-11 18:07:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:38,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:38,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:38,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:38,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167833649] [2024-10-11 18:07:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167833649] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:38,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:38,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 18:07:38,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6389090] [2024-10-11 18:07:38,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:38,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 18:07:38,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 18:07:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:07:38,408 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:38,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:38,553 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-10-11 18:07:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:07:38,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-10-11 18:07:38,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:38,554 INFO L225 Difference]: With dead ends: 63 [2024-10-11 18:07:38,555 INFO L226 Difference]: Without dead ends: 63 [2024-10-11 18:07:38,555 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:07:38,556 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:38,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 137 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:38,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-11 18:07:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-10-11 18:07:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 58 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-10-11 18:07:38,563 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 19 [2024-10-11 18:07:38,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:38,563 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-10-11 18:07:38,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-10-11 18:07:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 18:07:38,564 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:38,564 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:38,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 18:07:38,565 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:38,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash 954615771, now seen corresponding path program 1 times [2024-10-11 18:07:38,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:38,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539983428] [2024-10-11 18:07:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:38,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:38,700 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:38,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:38,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539983428] [2024-10-11 18:07:38,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539983428] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:38,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:38,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 18:07:38,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845286463] [2024-10-11 18:07:38,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:38,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 18:07:38,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:38,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 18:07:38,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:07:38,759 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:38,907 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2024-10-11 18:07:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:07:38,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-10-11 18:07:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:38,909 INFO L225 Difference]: With dead ends: 67 [2024-10-11 18:07:38,909 INFO L226 Difference]: Without dead ends: 67 [2024-10-11 18:07:38,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:07:38,910 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:38,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 157 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-11 18:07:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-10-11 18:07:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.5) internal successors, (75), 62 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2024-10-11 18:07:38,913 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 19 [2024-10-11 18:07:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:38,914 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2024-10-11 18:07:38,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:38,914 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2024-10-11 18:07:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-11 18:07:38,914 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:38,914 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] [2024-10-11 18:07:38,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 18:07:38,915 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:38,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:38,915 INFO L85 PathProgramCache]: Analyzing trace with hash -471683646, now seen corresponding path program 1 times [2024-10-11 18:07:38,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:38,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807866292] [2024-10-11 18:07:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:38,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:38,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:39,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:39,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807866292] [2024-10-11 18:07:39,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807866292] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:39,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:39,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-11 18:07:39,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112550276] [2024-10-11 18:07:39,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:39,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 18:07:39,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 18:07:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:07:39,019 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:39,127 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2024-10-11 18:07:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:07:39,128 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-10-11 18:07:39,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:39,129 INFO L225 Difference]: With dead ends: 79 [2024-10-11 18:07:39,129 INFO L226 Difference]: Without dead ends: 79 [2024-10-11 18:07:39,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:07:39,130 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:39,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 206 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-11 18:07:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2024-10-11 18:07:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.509090909090909) internal successors, (83), 67 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:39,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2024-10-11 18:07:39,133 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 20 [2024-10-11 18:07:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:39,133 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2024-10-11 18:07:39,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2024-10-11 18:07:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-11 18:07:39,134 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:39,134 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] [2024-10-11 18:07:39,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-11 18:07:39,135 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:39,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:39,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1737215432, now seen corresponding path program 1 times [2024-10-11 18:07:39,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:39,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724194064] [2024-10-11 18:07:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:39,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:39,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:39,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:39,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724194064] [2024-10-11 18:07:39,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724194064] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:07:39,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:07:39,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 18:07:39,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435890486] [2024-10-11 18:07:39,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:07:39,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 18:07:39,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:39,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 18:07:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:07:39,277 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:39,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:39,405 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2024-10-11 18:07:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:07:39,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-10-11 18:07:39,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:39,406 INFO L225 Difference]: With dead ends: 78 [2024-10-11 18:07:39,406 INFO L226 Difference]: Without dead ends: 78 [2024-10-11 18:07:39,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:07:39,407 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:39,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 187 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-11 18:07:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2024-10-11 18:07:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 70 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2024-10-11 18:07:39,411 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 21 [2024-10-11 18:07:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:39,411 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2024-10-11 18:07:39,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:07:39,412 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2024-10-11 18:07:39,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-11 18:07:39,414 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:39,414 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:39,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-11 18:07:39,415 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:39,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1188610864, now seen corresponding path program 1 times [2024-10-11 18:07:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:39,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694713561] [2024-10-11 18:07:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:39,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:39,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:39,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 18:07:39,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:39,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694713561] [2024-10-11 18:07:39,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694713561] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:39,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719448049] [2024-10-11 18:07:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:39,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:39,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:39,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 18:07:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:39,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 18:07:39,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 18:07:39,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:39,648 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 18:07:39,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2024-10-11 18:07:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 18:07:39,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719448049] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:07:39,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:07:39,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 6 [2024-10-11 18:07:39,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611029256] [2024-10-11 18:07:39,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:39,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 18:07:39,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 18:07:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:07:39,671 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:07:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:39,749 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2024-10-11 18:07:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:07:39,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-10-11 18:07:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:39,750 INFO L225 Difference]: With dead ends: 80 [2024-10-11 18:07:39,751 INFO L226 Difference]: Without dead ends: 80 [2024-10-11 18:07:39,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:07:39,751 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:39,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 139 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-10-11 18:07:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2024-10-11 18:07:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 74 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2024-10-11 18:07:39,755 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 22 [2024-10-11 18:07:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:39,755 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2024-10-11 18:07:39,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:07:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2024-10-11 18:07:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-11 18:07:39,756 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:39,756 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:39,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 18:07:39,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 18:07:39,957 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:39,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:39,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1188610863, now seen corresponding path program 1 times [2024-10-11 18:07:39,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:39,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773109463] [2024-10-11 18:07:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:39,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:40,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:40,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:40,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:40,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773109463] [2024-10-11 18:07:40,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773109463] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:40,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322251874] [2024-10-11 18:07:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:40,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:40,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:40,144 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:40,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 18:07:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:40,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 18:07:40,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 18:07:40,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:40,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:40,411 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 [2024-10-11 18:07:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 18:07:40,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322251874] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:07:40,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:07:40,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2024-10-11 18:07:40,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111939360] [2024-10-11 18:07:40,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:40,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 18:07:40,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:40,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 18:07:40,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-10-11 18:07:40,492 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-11 18:07:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:40,610 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2024-10-11 18:07:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 18:07:40,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 22 [2024-10-11 18:07:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:40,611 INFO L225 Difference]: With dead ends: 82 [2024-10-11 18:07:40,611 INFO L226 Difference]: Without dead ends: 82 [2024-10-11 18:07:40,612 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-10-11 18:07:40,612 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:40,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 280 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-11 18:07:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2024-10-11 18:07:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.5) internal successors, (93), 74 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2024-10-11 18:07:40,618 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 22 [2024-10-11 18:07:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:40,618 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2024-10-11 18:07:40,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-11 18:07:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2024-10-11 18:07:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 18:07:40,619 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:40,619 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] [2024-10-11 18:07:40,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 18:07:40,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:40,820 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:40,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:40,821 INFO L85 PathProgramCache]: Analyzing trace with hash 206331473, now seen corresponding path program 1 times [2024-10-11 18:07:40,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:40,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36432694] [2024-10-11 18:07:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:40,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:41,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:41,156 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:41,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36432694] [2024-10-11 18:07:41,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36432694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939471100] [2024-10-11 18:07:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:41,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:41,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:41,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:41,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 18:07:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:41,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-11 18:07:41,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:41,539 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 [2024-10-11 18:07:41,545 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 [2024-10-11 18:07:41,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 18:07:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:07:41,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2024-10-11 18:07:41,698 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 [2024-10-11 18:07:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:41,702 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:41,724 INFO L349 Elim1Store]: treesize reduction 5, result has 77.3 percent of original size [2024-10-11 18:07:41,725 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 26 treesize of output 25 [2024-10-11 18:07:41,841 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 73 treesize of output 69 [2024-10-11 18:07:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:42,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939471100] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:07:42,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:07:42,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 35 [2024-10-11 18:07:42,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936808161] [2024-10-11 18:07:42,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:42,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-11 18:07:42,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-11 18:07:42,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2024-10-11 18:07:42,148 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 36 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-11 18:07:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:42,771 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2024-10-11 18:07:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 18:07:42,771 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2024-10-11 18:07:42,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:42,772 INFO L225 Difference]: With dead ends: 83 [2024-10-11 18:07:42,772 INFO L226 Difference]: Without dead ends: 83 [2024-10-11 18:07:42,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=1816, Unknown=0, NotChecked=0, Total=1980 [2024-10-11 18:07:42,774 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:42,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 696 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 18:07:42,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-11 18:07:42,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2024-10-11 18:07:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.515625) internal successors, (97), 76 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2024-10-11 18:07:42,777 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 24 [2024-10-11 18:07:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:42,777 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2024-10-11 18:07:42,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-11 18:07:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2024-10-11 18:07:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 18:07:42,778 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:42,778 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] [2024-10-11 18:07:42,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 18:07:42,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-10-11 18:07:42,979 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:42,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash 206331474, now seen corresponding path program 1 times [2024-10-11 18:07:42,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:42,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499626411] [2024-10-11 18:07:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:42,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:43,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:43,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:43,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:43,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499626411] [2024-10-11 18:07:43,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499626411] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:43,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077726240] [2024-10-11 18:07:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:43,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:43,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:43,625 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:43,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 18:07:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:43,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-11 18:07:43,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:43,750 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 [2024-10-11 18:07:43,838 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 [2024-10-11 18:07:43,924 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 18:07:43,925 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 [2024-10-11 18:07:43,972 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 [2024-10-11 18:07:43,987 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 [2024-10-11 18:07:44,072 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-11 18:07:44,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-10-11 18:07:44,080 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 [2024-10-11 18:07:44,168 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 [2024-10-11 18:07:44,172 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 [2024-10-11 18:07:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:44,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:44,373 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_774 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_774) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) (forall ((v_ArrVal_775 (Array Int Int)) (v_ArrVal_774 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_774) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_775) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))))) is different from false [2024-10-11 18:07:44,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:44,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2024-10-11 18:07:44,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:44,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-10-11 18:07:44,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:44,477 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 52 treesize of output 55 [2024-10-11 18:07:44,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:44,492 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 82 treesize of output 81 [2024-10-11 18:07:44,522 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 11 treesize of output 9 [2024-10-11 18:07:44,525 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 9 treesize of output 7 [2024-10-11 18:07:44,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:44,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-10-11 18:07:44,533 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 18:07:44,536 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2024-10-11 18:07:44,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077726240] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:44,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:07:44,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2024-10-11 18:07:44,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855897690] [2024-10-11 18:07:44,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:44,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 18:07:44,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 18:07:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1144, Unknown=13, NotChecked=68, Total=1332 [2024-10-11 18:07:44,682 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 29 states, 25 states have (on average 1.52) internal successors, (38), 23 states have internal predecessors, (38), 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) [2024-10-11 18:07:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:45,298 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-10-11 18:07:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 18:07:45,299 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.52) internal successors, (38), 23 states have internal predecessors, (38), 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 24 [2024-10-11 18:07:45,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:45,300 INFO L225 Difference]: With dead ends: 85 [2024-10-11 18:07:45,300 INFO L226 Difference]: Without dead ends: 85 [2024-10-11 18:07:45,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=1630, Unknown=14, NotChecked=82, Total=1892 [2024-10-11 18:07:45,301 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:45,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 564 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 18:07:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-11 18:07:45,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2024-10-11 18:07:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.5) internal successors, (96), 76 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2024-10-11 18:07:45,306 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 24 [2024-10-11 18:07:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:45,306 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2024-10-11 18:07:45,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.52) internal successors, (38), 23 states have internal predecessors, (38), 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) [2024-10-11 18:07:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2024-10-11 18:07:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 18:07:45,307 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:45,307 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] [2024-10-11 18:07:45,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 18:07:45,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:45,513 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:45,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash 971110861, now seen corresponding path program 1 times [2024-10-11 18:07:45,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:45,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129438310] [2024-10-11 18:07:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:45,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:45,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:45,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129438310] [2024-10-11 18:07:45,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129438310] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445845063] [2024-10-11 18:07:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:45,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:45,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:45,860 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:45,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 18:07:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:45,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-11 18:07:45,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:45,969 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 [2024-10-11 18:07:45,974 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 [2024-10-11 18:07:46,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:46,122 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 15 [2024-10-11 18:07:46,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:46,132 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 15 [2024-10-11 18:07:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:46,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:46,281 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 12 treesize of output 10 [2024-10-11 18:07:46,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-11 18:07:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:46,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445845063] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:07:46,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:07:46,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 20 [2024-10-11 18:07:46,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895261546] [2024-10-11 18:07:46,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:46,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 18:07:46,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:46,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 18:07:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2024-10-11 18:07:46,315 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:07:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:46,555 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2024-10-11 18:07:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 18:07:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-10-11 18:07:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:46,557 INFO L225 Difference]: With dead ends: 84 [2024-10-11 18:07:46,557 INFO L226 Difference]: Without dead ends: 84 [2024-10-11 18:07:46,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2024-10-11 18:07:46,558 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:46,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 313 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 18:07:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-11 18:07:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-10-11 18:07:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 79 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2024-10-11 18:07:46,561 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 24 [2024-10-11 18:07:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:46,561 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2024-10-11 18:07:46,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:07:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2024-10-11 18:07:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 18:07:46,564 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:46,564 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:46,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 18:07:46,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-11 18:07:46,766 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:46,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2033653730, now seen corresponding path program 1 times [2024-10-11 18:07:46,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:46,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219214525] [2024-10-11 18:07:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:46,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:47,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:47,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:47,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 18:07:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 18:07:47,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:47,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219214525] [2024-10-11 18:07:47,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219214525] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:47,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700858690] [2024-10-11 18:07:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:47,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:47,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:47,168 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:47,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 18:07:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:47,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 18:07:47,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:47,294 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 [2024-10-11 18:07:47,344 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 18:07:47,344 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 [2024-10-11 18:07:47,361 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 [2024-10-11 18:07:47,409 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-11 18:07:47,409 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 [2024-10-11 18:07:47,417 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 [2024-10-11 18:07:47,427 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base 1))) is different from true [2024-10-11 18:07:47,441 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 18:07:47,441 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 [2024-10-11 18:07:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 6 not checked. [2024-10-11 18:07:47,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:47,569 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2024-10-11 18:07:47,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-10-11 18:07:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:47,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700858690] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:07:47,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:07:47,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 28 [2024-10-11 18:07:47,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68325271] [2024-10-11 18:07:47,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:47,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 18:07:47,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:47,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 18:07:47,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=668, Unknown=8, NotChecked=52, Total=812 [2024-10-11 18:07:47,766 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 29 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 18:07:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:47,988 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2024-10-11 18:07:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:07:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 26 [2024-10-11 18:07:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:47,989 INFO L225 Difference]: With dead ends: 83 [2024-10-11 18:07:47,989 INFO L226 Difference]: Without dead ends: 83 [2024-10-11 18:07:47,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=925, Unknown=8, NotChecked=62, Total=1122 [2024-10-11 18:07:47,990 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:47,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 332 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 334 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2024-10-11 18:07:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-11 18:07:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-10-11 18:07:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.462686567164179) internal successors, (98), 78 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2024-10-11 18:07:47,995 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 26 [2024-10-11 18:07:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:47,996 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2024-10-11 18:07:47,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 3 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 18:07:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2024-10-11 18:07:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 18:07:47,996 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:47,996 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:07:48,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 18:07:48,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:48,197 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:48,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2033653729, now seen corresponding path program 1 times [2024-10-11 18:07:48,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:48,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647936985] [2024-10-11 18:07:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:48,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:48,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:48,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:48,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 18:07:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 18:07:48,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:48,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647936985] [2024-10-11 18:07:48,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647936985] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:48,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360605474] [2024-10-11 18:07:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:48,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:48,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:48,830 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:48,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 18:07:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:48,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-11 18:07:48,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:48,966 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 [2024-10-11 18:07:49,000 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 [2024-10-11 18:07:49,064 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 18:07:49,064 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 [2024-10-11 18:07:49,090 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 [2024-10-11 18:07:49,092 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 [2024-10-11 18:07:49,155 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-11 18:07:49,155 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 [2024-10-11 18:07:49,165 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 [2024-10-11 18:07:49,211 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 [2024-10-11 18:07:49,218 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 [2024-10-11 18:07:49,293 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 [2024-10-11 18:07:49,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:07:49,316 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 [2024-10-11 18:07:49,323 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 18:07:49,324 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 [2024-10-11 18:07:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-10-11 18:07:49,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:49,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360605474] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:49,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:07:49,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2024-10-11 18:07:49,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852310585] [2024-10-11 18:07:49,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:49,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 18:07:49,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 18:07:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=782, Unknown=1, NotChecked=56, Total=930 [2024-10-11 18:07:49,451 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-11 18:07:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:49,909 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2024-10-11 18:07:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 18:07:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 26 [2024-10-11 18:07:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:49,910 INFO L225 Difference]: With dead ends: 80 [2024-10-11 18:07:49,910 INFO L226 Difference]: Without dead ends: 80 [2024-10-11 18:07:49,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=1174, Unknown=1, NotChecked=70, Total=1406 [2024-10-11 18:07:49,912 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:49,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 492 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 582 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2024-10-11 18:07:49,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-10-11 18:07:49,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-10-11 18:07:49,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 75 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2024-10-11 18:07:49,915 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 26 [2024-10-11 18:07:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:49,915 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2024-10-11 18:07:49,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-11 18:07:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2024-10-11 18:07:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 18:07:49,916 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:49,916 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] [2024-10-11 18:07:49,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 18:07:50,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-11 18:07:50,121 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:50,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:50,121 INFO L85 PathProgramCache]: Analyzing trace with hash 39664175, now seen corresponding path program 1 times [2024-10-11 18:07:50,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:50,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903456117] [2024-10-11 18:07:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:50,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:50,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:50,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:50,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903456117] [2024-10-11 18:07:50,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903456117] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:50,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278783440] [2024-10-11 18:07:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:50,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:50,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:50,293 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:50,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 18:07:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:50,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-11 18:07:50,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:50,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 18:07:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:50,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:50,536 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_40| Int)) (or (= (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_40| 0) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_40|) 0)))) is different from false [2024-10-11 18:07:50,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278783440] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:50,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:07:50,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2024-10-11 18:07:50,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482660158] [2024-10-11 18:07:50,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:50,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 18:07:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:50,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 18:07:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=132, Unknown=1, NotChecked=22, Total=182 [2024-10-11 18:07:50,539 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 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) [2024-10-11 18:07:50,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:50,681 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2024-10-11 18:07:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 18:07:50,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 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 25 [2024-10-11 18:07:50,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:50,682 INFO L225 Difference]: With dead ends: 82 [2024-10-11 18:07:50,682 INFO L226 Difference]: Without dead ends: 66 [2024-10-11 18:07:50,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=132, Unknown=1, NotChecked=22, Total=182 [2024-10-11 18:07:50,683 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:50,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 151 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:07:50,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-11 18:07:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-10-11 18:07:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.509433962264151) internal successors, (80), 61 states have internal predecessors, (80), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2024-10-11 18:07:50,689 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 25 [2024-10-11 18:07:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:50,689 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2024-10-11 18:07:50,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 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) [2024-10-11 18:07:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2024-10-11 18:07:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 18:07:50,690 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:50,691 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] [2024-10-11 18:07:50,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 18:07:50,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 18:07:50,895 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:50,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash 716059003, now seen corresponding path program 1 times [2024-10-11 18:07:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:50,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692796015] [2024-10-11 18:07:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:50,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:51,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:51,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:51,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692796015] [2024-10-11 18:07:51,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692796015] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610972758] [2024-10-11 18:07:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:51,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:51,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:51,281 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:51,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 18:07:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:51,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-11 18:07:51,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:51,558 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 [2024-10-11 18:07:51,562 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 [2024-10-11 18:07:51,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 18:07:51,633 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-10-11 18:07:51,634 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 37 [2024-10-11 18:07:51,645 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 19 treesize of output 13 [2024-10-11 18:07:51,796 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 37 treesize of output 25 [2024-10-11 18:07:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:51,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:52,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:52,050 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 15 treesize of output 19 [2024-10-11 18:07:52,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:52,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-10-11 18:07:52,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:52,158 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 33 treesize of output 36 [2024-10-11 18:07:52,161 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 20 treesize of output 18 [2024-10-11 18:07:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:52,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610972758] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:07:52,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:07:52,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 15] total 39 [2024-10-11 18:07:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127063502] [2024-10-11 18:07:52,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:07:52,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-11 18:07:52,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:07:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-11 18:07:52,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 18:07:52,445 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 40 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-11 18:07:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:07:52,981 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2024-10-11 18:07:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 18:07:52,982 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2024-10-11 18:07:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:07:52,982 INFO L225 Difference]: With dead ends: 70 [2024-10-11 18:07:52,982 INFO L226 Difference]: Without dead ends: 70 [2024-10-11 18:07:52,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=230, Invalid=2320, Unknown=0, NotChecked=0, Total=2550 [2024-10-11 18:07:52,984 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:07:52,984 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 490 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 18:07:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-11 18:07:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-10-11 18:07:52,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.4821428571428572) internal successors, (83), 64 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:07:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2024-10-11 18:07:52,988 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 26 [2024-10-11 18:07:52,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:07:52,988 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2024-10-11 18:07:52,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-11 18:07:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2024-10-11 18:07:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 18:07:52,989 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:07:52,989 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] [2024-10-11 18:07:53,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 18:07:53,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-11 18:07:53,189 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-10-11 18:07:53,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:07:53,190 INFO L85 PathProgramCache]: Analyzing trace with hash 716120978, now seen corresponding path program 2 times [2024-10-11 18:07:53,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:07:53,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320621306] [2024-10-11 18:07:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:07:53,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:07:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:53,772 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 18:07:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:53,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 18:07:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:07:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:07:53,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:07:53,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320621306] [2024-10-11 18:07:53,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320621306] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:07:53,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212763184] [2024-10-11 18:07:53,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:07:53,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:07:53,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:07:53,971 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:07:53,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 18:07:54,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 18:07:54,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:07:54,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-10-11 18:07:54,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:07:54,111 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 [2024-10-11 18:07:54,152 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 [2024-10-11 18:07:54,158 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 [2024-10-11 18:07:54,171 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 [2024-10-11 18:07:54,177 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 [2024-10-11 18:07:54,194 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 18:07:54,194 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 [2024-10-11 18:07:54,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-10-11 18:07:54,223 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 [2024-10-11 18:07:54,283 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-10-11 18:07:54,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 50 [2024-10-11 18:07:54,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2024-10-11 18:07:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:07:54,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:07:55,553 INFO L349 Elim1Store]: treesize reduction 3117, result has 36.0 percent of original size [2024-10-11 18:07:55,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 19 case distinctions, treesize of input 7517 treesize of output 5494 [2024-10-11 18:07:55,968 INFO L349 Elim1Store]: treesize reduction 192, result has 40.9 percent of original size [2024-10-11 18:07:55,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 5471 treesize of output 4565 [2024-10-11 18:07:56,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:07:56,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 3688 treesize of output 3748 [2024-10-11 18:07:58,386 INFO L349 Elim1Store]: treesize reduction 2151, result has 38.5 percent of original size [2024-10-11 18:07:58,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 70 case distinctions, treesize of input 22263 treesize of output 11731 [2024-10-11 18:07:59,729 INFO L349 Elim1Store]: treesize reduction 296, result has 41.6 percent of original size [2024-10-11 18:07:59,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 5108 treesize of output 4830 [2024-10-11 18:08:00,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:08:00,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 4718 treesize of output 4692 [2024-10-11 18:08:35,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-11 18:08:36,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4