./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 10:36:37,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 10:36:37,341 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 10:36:37,346 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 10:36:37,348 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 10:36:37,377 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 10:36:37,378 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 10:36:37,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 10:36:37,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 10:36:37,379 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 10:36:37,379 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 10:36:37,380 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 10:36:37,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 10:36:37,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 10:36:37,382 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 10:36:37,382 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 10:36:37,383 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 10:36:37,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 10:36:37,383 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 10:36:37,384 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 10:36:37,384 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 10:36:37,384 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 10:36:37,385 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 10:36:37,385 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 10:36:37,385 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 10:36:37,386 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 10:36:37,386 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 10:36:37,386 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 10:36:37,386 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 10:36:37,387 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 10:36:37,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 10:36:37,387 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 10:36:37,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 10:36:37,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:36:37,388 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 10:36:37,388 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 10:36:37,388 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 10:36:37,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 10:36:37,389 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 10:36:37,389 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 10:36:37,389 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 10:36:37,390 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 10:36:37,390 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2024-10-13 10:36:37,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 10:36:37,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 10:36:37,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 10:36:37,737 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 10:36:37,737 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 10:36:37,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-10-13 10:36:39,170 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 10:36:39,352 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 10:36:39,352 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-10-13 10:36:39,360 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a240e627/f2a4021625164965b84e2b1f094dd60f/FLAGb0a094f63 [2024-10-13 10:36:39,373 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a240e627/f2a4021625164965b84e2b1f094dd60f [2024-10-13 10:36:39,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 10:36:39,378 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 10:36:39,380 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 10:36:39,380 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 10:36:39,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 10:36:39,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4227ad20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39, skipping insertion in model container [2024-10-13 10:36:39,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,413 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 10:36:39,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:36:39,626 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 10:36:39,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:36:39,665 INFO L204 MainTranslator]: Completed translation [2024-10-13 10:36:39,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39 WrapperNode [2024-10-13 10:36:39,666 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 10:36:39,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 10:36:39,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 10:36:39,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 10:36:39,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,683 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,703 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2024-10-13 10:36:39,704 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 10:36:39,705 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 10:36:39,705 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 10:36:39,708 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 10:36:39,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,721 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,736 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-10-13 10:36:39,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,737 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,744 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,749 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,753 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 10:36:39,753 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 10:36:39,754 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 10:36:39,754 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 10:36:39,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (1/1) ... [2024-10-13 10:36:39,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:36:39,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:36:39,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 10:36:39,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 10:36:39,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 10:36:39,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-13 10:36:39,843 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-13 10:36:39,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 10:36:39,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 10:36:39,844 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-10-13 10:36:39,844 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-10-13 10:36:39,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 10:36:39,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 10:36:39,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 10:36:39,844 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-10-13 10:36:39,846 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-10-13 10:36:39,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 10:36:39,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 10:36:39,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 10:36:39,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 10:36:39,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-10-13 10:36:39,848 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-10-13 10:36:39,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 10:36:39,938 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 10:36:39,940 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 10:36:40,368 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-10-13 10:36:40,368 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 10:36:40,403 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 10:36:40,403 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 10:36:40,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:36:40 BoogieIcfgContainer [2024-10-13 10:36:40,404 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 10:36:40,405 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 10:36:40,405 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 10:36:40,410 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 10:36:40,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:36:39" (1/3) ... [2024-10-13 10:36:40,412 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:36:40, skipping insertion in model container [2024-10-13 10:36:40,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:36:39" (2/3) ... [2024-10-13 10:36:40,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:36:40, skipping insertion in model container [2024-10-13 10:36:40,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:36:40" (3/3) ... [2024-10-13 10:36:40,415 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2024-10-13 10:36:40,430 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 10:36:40,431 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-10-13 10:36:40,485 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 10:36:40,493 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;@6bbc4d23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 10:36:40,493 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-10-13 10:36:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 79 states have internal predecessors, (89), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-13 10:36:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 10:36:40,505 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:40,506 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] [2024-10-13 10:36:40,508 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:40,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1534891119, now seen corresponding path program 1 times [2024-10-13 10:36:40,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:40,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822613573] [2024-10-13 10:36:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:40,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:40,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:40,685 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-13 10:36:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:40,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 10:36:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:40,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 10:36:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 10:36:40,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:40,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822613573] [2024-10-13 10:36:40,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822613573] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:36:40,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:36:40,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:36:40,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903548747] [2024-10-13 10:36:40,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:36:40,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 10:36:40,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:40,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 10:36:40,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:36:40,764 INFO L87 Difference]: Start difference. First operand has 94 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 79 states have internal predecessors, (89), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 10:36:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:40,888 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2024-10-13 10:36:40,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 10:36:40,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2024-10-13 10:36:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:40,899 INFO L225 Difference]: With dead ends: 103 [2024-10-13 10:36:40,899 INFO L226 Difference]: Without dead ends: 102 [2024-10-13 10:36:40,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:36:40,905 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 26 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:40,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:36:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-13 10:36:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2024-10-13 10:36:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 78 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-13 10:36:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-10-13 10:36:40,947 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 25 [2024-10-13 10:36:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:40,948 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-10-13 10:36:40,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 10:36:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-10-13 10:36:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 10:36:40,949 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:40,950 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] [2024-10-13 10:36:40,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 10:36:40,950 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:40,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:40,951 INFO L85 PathProgramCache]: Analyzing trace with hash 742628587, now seen corresponding path program 1 times [2024-10-13 10:36:40,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:40,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209006107] [2024-10-13 10:36:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:40,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:41,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:41,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-13 10:36:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:41,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 10:36:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:41,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 10:36:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 10:36:41,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209006107] [2024-10-13 10:36:41,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209006107] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:36:41,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:36:41,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:36:41,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52879920] [2024-10-13 10:36:41,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:36:41,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:36:41,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:36:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:36:41,323 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 10:36:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:41,503 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2024-10-13 10:36:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:36:41,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-10-13 10:36:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:41,505 INFO L225 Difference]: With dead ends: 99 [2024-10-13 10:36:41,506 INFO L226 Difference]: Without dead ends: 99 [2024-10-13 10:36:41,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:36:41,507 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 49 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:41,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 201 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:36:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-13 10:36:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2024-10-13 10:36:41,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 75 states have internal predecessors, (80), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-13 10:36:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2024-10-13 10:36:41,531 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 25 [2024-10-13 10:36:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:41,534 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2024-10-13 10:36:41,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 10:36:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2024-10-13 10:36:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 10:36:41,536 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:41,536 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] [2024-10-13 10:36:41,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 10:36:41,538 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:41,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash 742628588, now seen corresponding path program 1 times [2024-10-13 10:36:41,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:41,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698771739] [2024-10-13 10:36:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:41,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:42,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:42,182 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-13 10:36:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:42,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 10:36:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:42,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 10:36:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 10:36:42,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:42,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698771739] [2024-10-13 10:36:42,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698771739] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:36:42,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:36:42,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-13 10:36:42,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689022209] [2024-10-13 10:36:42,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:36:42,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 10:36:42,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:42,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 10:36:42,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-13 10:36:42,260 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-13 10:36:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:42,564 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2024-10-13 10:36:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 10:36:42,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2024-10-13 10:36:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:42,566 INFO L225 Difference]: With dead ends: 105 [2024-10-13 10:36:42,566 INFO L226 Difference]: Without dead ends: 105 [2024-10-13 10:36:42,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-10-13 10:36:42,567 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 97 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:42,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 485 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:36:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-13 10:36:42,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2024-10-13 10:36:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 77 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-13 10:36:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2024-10-13 10:36:42,584 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 25 [2024-10-13 10:36:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:42,584 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2024-10-13 10:36:42,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-13 10:36:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2024-10-13 10:36:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 10:36:42,585 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:42,585 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] [2024-10-13 10:36:42,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 10:36:42,586 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:42,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:42,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1546649782, now seen corresponding path program 1 times [2024-10-13 10:36:42,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:42,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912602179] [2024-10-13 10:36:42,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:42,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:42,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:42,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-13 10:36:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:42,959 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 10:36:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:42,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 10:36:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 10:36:42,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:42,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912602179] [2024-10-13 10:36:42,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912602179] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:36:42,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:36:42,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 10:36:42,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578853112] [2024-10-13 10:36:42,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:36:42,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 10:36:42,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:42,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 10:36:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-13 10:36:42,979 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 10:36:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:43,320 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2024-10-13 10:36:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 10:36:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2024-10-13 10:36:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:43,323 INFO L225 Difference]: With dead ends: 102 [2024-10-13 10:36:43,323 INFO L226 Difference]: Without dead ends: 102 [2024-10-13 10:36:43,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:36:43,324 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 28 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:43,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 354 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:36:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-13 10:36:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2024-10-13 10:36:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 78 states have internal predecessors, (85), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-13 10:36:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2024-10-13 10:36:43,337 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 26 [2024-10-13 10:36:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:43,338 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2024-10-13 10:36:43,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 10:36:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2024-10-13 10:36:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 10:36:43,340 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:43,340 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] [2024-10-13 10:36:43,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 10:36:43,341 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:43,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:43,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1546649781, now seen corresponding path program 1 times [2024-10-13 10:36:43,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:43,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428009280] [2024-10-13 10:36:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:43,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:43,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:43,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-13 10:36:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:43,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 10:36:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:43,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 10:36:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 10:36:43,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:43,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428009280] [2024-10-13 10:36:43,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428009280] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:36:43,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:36:43,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:36:43,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398558200] [2024-10-13 10:36:43,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:36:43,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:36:43,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:43,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:36:43,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:36:43,411 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 10:36:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:43,529 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2024-10-13 10:36:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:36:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-10-13 10:36:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:43,532 INFO L225 Difference]: With dead ends: 101 [2024-10-13 10:36:43,532 INFO L226 Difference]: Without dead ends: 101 [2024-10-13 10:36:43,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:36:43,533 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 49 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:43,534 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 211 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:36:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-13 10:36:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2024-10-13 10:36:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 77 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-13 10:36:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2024-10-13 10:36:43,546 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 26 [2024-10-13 10:36:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:43,546 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2024-10-13 10:36:43,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-13 10:36:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2024-10-13 10:36:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-13 10:36:43,547 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:43,547 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:36:43,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 10:36:43,548 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:43,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:43,548 INFO L85 PathProgramCache]: Analyzing trace with hash 272355240, now seen corresponding path program 1 times [2024-10-13 10:36:43,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:43,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139939307] [2024-10-13 10:36:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:43,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:43,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:43,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-13 10:36:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:43,807 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 10:36:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:43,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 10:36:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 10:36:43,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:43,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139939307] [2024-10-13 10:36:43,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139939307] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:36:43,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:36:43,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-13 10:36:43,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653969491] [2024-10-13 10:36:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:36:43,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 10:36:43,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:43,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 10:36:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-13 10:36:43,817 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 10:36:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:44,005 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-10-13 10:36:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 10:36:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-10-13 10:36:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:44,006 INFO L225 Difference]: With dead ends: 103 [2024-10-13 10:36:44,006 INFO L226 Difference]: Without dead ends: 103 [2024-10-13 10:36:44,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-13 10:36:44,007 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 58 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:44,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 507 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:36:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-13 10:36:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2024-10-13 10:36:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 77 states have internal predecessors, (82), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-13 10:36:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-10-13 10:36:44,013 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 28 [2024-10-13 10:36:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:44,013 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-10-13 10:36:44,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 10:36:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-10-13 10:36:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-13 10:36:44,014 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:44,014 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:36:44,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 10:36:44,014 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:44,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:44,015 INFO L85 PathProgramCache]: Analyzing trace with hash 271845459, now seen corresponding path program 1 times [2024-10-13 10:36:44,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:44,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844860477] [2024-10-13 10:36:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:44,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:44,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:44,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-13 10:36:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:44,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 10:36:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:44,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 10:36:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 10:36:44,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:44,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844860477] [2024-10-13 10:36:44,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844860477] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:44,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044718050] [2024-10-13 10:36:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:44,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:44,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:36:44,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:36:44,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 10:36:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:44,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 10:36:44,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:36:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 10:36:44,471 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 10:36:44,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044718050] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:36:44,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 10:36:44,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2024-10-13 10:36:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971020151] [2024-10-13 10:36:44,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:36:44,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 10:36:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:44,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 10:36:44,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-10-13 10:36:44,473 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 10:36:44,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:44,563 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2024-10-13 10:36:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 10:36:44,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-10-13 10:36:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:44,564 INFO L225 Difference]: With dead ends: 95 [2024-10-13 10:36:44,564 INFO L226 Difference]: Without dead ends: 93 [2024-10-13 10:36:44,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-10-13 10:36:44,565 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 14 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:44,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 370 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:36:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-13 10:36:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-10-13 10:36:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 78 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-13 10:36:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-10-13 10:36:44,571 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 28 [2024-10-13 10:36:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:44,571 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-10-13 10:36:44,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 10:36:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-10-13 10:36:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-13 10:36:44,572 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:44,572 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:36:44,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 10:36:44,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:44,774 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:44,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2110535227, now seen corresponding path program 1 times [2024-10-13 10:36:44,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:44,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382001428] [2024-10-13 10:36:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:44,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:45,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:45,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 10:36:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:45,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 10:36:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:45,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 10:36:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 10:36:45,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:45,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382001428] [2024-10-13 10:36:45,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382001428] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:45,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083870832] [2024-10-13 10:36:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:45,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:45,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:36:45,408 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:36:45,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 10:36:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:45,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 10:36:45,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:36:45,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 10:36:45,607 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 10 treesize of output 9 [2024-10-13 10:36:45,815 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 10:36:45,815 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 [2024-10-13 10:36:45,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-13 10:36:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 10:36:46,169 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:36:46,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083870832] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:46,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 10:36:46,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2024-10-13 10:36:46,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849843593] [2024-10-13 10:36:46,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 10:36:46,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 10:36:46,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:46,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 10:36:46,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2024-10-13 10:36:46,583 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-13 10:36:47,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:47,545 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2024-10-13 10:36:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 10:36:47,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 29 [2024-10-13 10:36:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:47,547 INFO L225 Difference]: With dead ends: 107 [2024-10-13 10:36:47,547 INFO L226 Difference]: Without dead ends: 107 [2024-10-13 10:36:47,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2024-10-13 10:36:47,548 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 228 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:47,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 352 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-13 10:36:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-13 10:36:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2024-10-13 10:36:47,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 80 states have internal predecessors, (85), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-13 10:36:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2024-10-13 10:36:47,560 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 29 [2024-10-13 10:36:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:47,560 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2024-10-13 10:36:47,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-13 10:36:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2024-10-13 10:36:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-13 10:36:47,564 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:47,564 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:36:47,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 10:36:47,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-13 10:36:47,765 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:47,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:47,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1002082631, now seen corresponding path program 1 times [2024-10-13 10:36:47,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:47,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099944635] [2024-10-13 10:36:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:47,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:48,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:48,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 10:36:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:48,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 10:36:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:48,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 10:36:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:48,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:48,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099944635] [2024-10-13 10:36:48,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099944635] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:48,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733739032] [2024-10-13 10:36:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:48,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:48,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:36:48,114 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:36:48,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 10:36:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:48,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 10:36:48,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:36:48,210 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 10 treesize of output 9 [2024-10-13 10:36:48,363 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-13 10:36:48,364 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 16 treesize of output 18 [2024-10-13 10:36:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:48,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:36:49,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733739032] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:49,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 10:36:49,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-10-13 10:36:49,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069957718] [2024-10-13 10:36:49,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 10:36:49,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 10:36:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 10:36:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-10-13 10:36:49,065 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-13 10:36:49,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:49,953 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2024-10-13 10:36:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 10:36:49,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2024-10-13 10:36:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:49,954 INFO L225 Difference]: With dead ends: 103 [2024-10-13 10:36:49,955 INFO L226 Difference]: Without dead ends: 103 [2024-10-13 10:36:49,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-10-13 10:36:49,956 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 121 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:49,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 453 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 10:36:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-13 10:36:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2024-10-13 10:36:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 51 states have (on average 1.6470588235294117) internal successors, (84), 79 states have internal predecessors, (84), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-13 10:36:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2024-10-13 10:36:49,969 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 30 [2024-10-13 10:36:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:49,970 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2024-10-13 10:36:49,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-13 10:36:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2024-10-13 10:36:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-13 10:36:49,971 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:49,971 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:36:49,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 10:36:50,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:50,172 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:50,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash 928823460, now seen corresponding path program 2 times [2024-10-13 10:36:50,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:50,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027905954] [2024-10-13 10:36:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:50,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:50,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:50,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 10:36:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:50,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 10:36:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:50,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 10:36:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 10:36:50,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:50,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027905954] [2024-10-13 10:36:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027905954] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:50,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926901619] [2024-10-13 10:36:50,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:36:50,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:50,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:36:50,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:36:50,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 10:36:50,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:36:50,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:36:50,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-13 10:36:50,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:36:50,603 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 [2024-10-13 10:36:50,609 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 10 treesize of output 9 [2024-10-13 10:36:50,737 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 10:36:50,737 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 [2024-10-13 10:36:50,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-13 10:36:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 10:36:51,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:36:51,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926901619] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:51,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 10:36:51,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2024-10-13 10:36:51,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266711948] [2024-10-13 10:36:51,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 10:36:51,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 10:36:51,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:51,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 10:36:51,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2024-10-13 10:36:51,386 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-13 10:36:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:52,723 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2024-10-13 10:36:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 10:36:52,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 32 [2024-10-13 10:36:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:52,725 INFO L225 Difference]: With dead ends: 126 [2024-10-13 10:36:52,725 INFO L226 Difference]: Without dead ends: 126 [2024-10-13 10:36:52,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2024-10-13 10:36:52,727 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 240 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:52,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 489 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 10:36:52,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-13 10:36:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2024-10-13 10:36:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 94 states have internal predecessors, (101), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-13 10:36:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2024-10-13 10:36:52,735 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 32 [2024-10-13 10:36:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:52,735 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2024-10-13 10:36:52,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-13 10:36:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2024-10-13 10:36:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-13 10:36:52,737 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:52,737 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:36:52,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 10:36:52,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:52,942 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:52,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:52,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1893959440, now seen corresponding path program 1 times [2024-10-13 10:36:52,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:52,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983397896] [2024-10-13 10:36:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:52,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:53,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:53,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 10:36:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:53,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 10:36:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:53,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 10:36:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:53,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:53,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983397896] [2024-10-13 10:36:53,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983397896] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:53,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492306989] [2024-10-13 10:36:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:53,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:53,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:36:53,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:36:53,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 10:36:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:53,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-13 10:36:53,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:36:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:53,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:36:54,069 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 71 treesize of output 65 [2024-10-13 10:36:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:54,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492306989] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:36:54,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:36:54,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-10-13 10:36:54,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096587481] [2024-10-13 10:36:54,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:36:54,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-13 10:36:54,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:54,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-13 10:36:54,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 10:36:54,371 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 36 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-13 10:36:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:55,436 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2024-10-13 10:36:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 10:36:55,437 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2024-10-13 10:36:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:55,439 INFO L225 Difference]: With dead ends: 171 [2024-10-13 10:36:55,439 INFO L226 Difference]: Without dead ends: 171 [2024-10-13 10:36:55,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=2564, Unknown=0, NotChecked=0, Total=2970 [2024-10-13 10:36:55,441 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 207 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:55,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1005 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-13 10:36:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-10-13 10:36:55,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2024-10-13 10:36:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.617283950617284) internal successors, (131), 108 states have internal predecessors, (131), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-13 10:36:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2024-10-13 10:36:55,451 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 35 [2024-10-13 10:36:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:55,453 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2024-10-13 10:36:55,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-13 10:36:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2024-10-13 10:36:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-13 10:36:55,454 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:55,454 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:36:55,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 10:36:55,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-13 10:36:55,655 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting upsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:55,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:55,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1893959441, now seen corresponding path program 1 times [2024-10-13 10:36:55,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:55,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289885424] [2024-10-13 10:36:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:55,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:55,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:55,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 10:36:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:55,728 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 10:36:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:55,731 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 10:36:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 10:36:55,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:55,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289885424] [2024-10-13 10:36:55,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289885424] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:36:55,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:36:55,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 10:36:55,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637156768] [2024-10-13 10:36:55,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:36:55,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 10:36:55,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:55,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 10:36:55,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:36:55,736 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 10:36:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:55,895 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2024-10-13 10:36:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:36:55,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2024-10-13 10:36:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:55,897 INFO L225 Difference]: With dead ends: 140 [2024-10-13 10:36:55,897 INFO L226 Difference]: Without dead ends: 140 [2024-10-13 10:36:55,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:36:55,898 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 62 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:55,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 215 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:36:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-13 10:36:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2024-10-13 10:36:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 105 states have internal predecessors, (120), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-13 10:36:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 156 transitions. [2024-10-13 10:36:55,904 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 156 transitions. Word has length 35 [2024-10-13 10:36:55,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:55,905 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 156 transitions. [2024-10-13 10:36:55,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 10:36:55,905 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 156 transitions. [2024-10-13 10:36:55,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-13 10:36:55,906 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:55,906 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:36:55,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 10:36:55,906 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:55,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:55,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1416799493, now seen corresponding path program 1 times [2024-10-13 10:36:55,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:55,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349561497] [2024-10-13 10:36:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:55,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:56,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:56,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 10:36:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:56,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 10:36:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:56,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 10:36:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:56,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:56,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349561497] [2024-10-13 10:36:56,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349561497] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:56,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087018621] [2024-10-13 10:36:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:56,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:56,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:36:56,182 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:36:56,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 10:36:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:56,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 10:36:56,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:36:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:56,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:36:56,653 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 28 treesize of output 24 [2024-10-13 10:36:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:56,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087018621] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:36:56,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:36:56,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-10-13 10:36:56,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557600537] [2024-10-13 10:36:56,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:36:56,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-13 10:36:56,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:56,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-13 10:36:56,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2024-10-13 10:36:56,758 INFO L87 Difference]: Start difference. First operand 130 states and 156 transitions. Second operand has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-13 10:36:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:57,275 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2024-10-13 10:36:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 10:36:57,276 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2024-10-13 10:36:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:57,277 INFO L225 Difference]: With dead ends: 151 [2024-10-13 10:36:57,279 INFO L226 Difference]: Without dead ends: 151 [2024-10-13 10:36:57,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-10-13 10:36:57,280 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 100 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:57,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 732 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:36:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-10-13 10:36:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 125. [2024-10-13 10:36:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 101 states have internal predecessors, (112), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-13 10:36:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2024-10-13 10:36:57,287 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 36 [2024-10-13 10:36:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:57,287 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2024-10-13 10:36:57,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-13 10:36:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2024-10-13 10:36:57,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-13 10:36:57,290 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:57,290 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:36:57,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 10:36:57,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:57,491 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:57,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash 38534880, now seen corresponding path program 1 times [2024-10-13 10:36:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:57,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906311348] [2024-10-13 10:36:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:57,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:57,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:57,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 10:36:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:57,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 10:36:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:57,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 10:36:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:57,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:57,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906311348] [2024-10-13 10:36:57,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906311348] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:57,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056237493] [2024-10-13 10:36:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:57,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:36:57,626 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:36:57,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 10:36:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:57,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 10:36:57,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:36:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:57,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:36:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:36:57,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056237493] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:36:57,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:36:57,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-10-13 10:36:57,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647078563] [2024-10-13 10:36:57,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:36:57,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 10:36:57,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:36:57,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 10:36:57,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-10-13 10:36:57,903 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 10:36:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:36:58,105 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2024-10-13 10:36:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 10:36:58,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-10-13 10:36:58,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:36:58,108 INFO L225 Difference]: With dead ends: 146 [2024-10-13 10:36:58,108 INFO L226 Difference]: Without dead ends: 146 [2024-10-13 10:36:58,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-10-13 10:36:58,109 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 41 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:36:58,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 605 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:36:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-13 10:36:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2024-10-13 10:36:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 107 states have internal predecessors, (117), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-13 10:36:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2024-10-13 10:36:58,114 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 38 [2024-10-13 10:36:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:36:58,115 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2024-10-13 10:36:58,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-13 10:36:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2024-10-13 10:36:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-13 10:36:58,116 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:36:58,116 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:36:58,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 10:36:58,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:58,317 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:36:58,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:36:58,317 INFO L85 PathProgramCache]: Analyzing trace with hash -546271565, now seen corresponding path program 3 times [2024-10-13 10:36:58,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:36:58,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764868106] [2024-10-13 10:36:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:36:58,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:36:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:58,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:36:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:58,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-13 10:36:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:58,954 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-13 10:36:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:58,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-13 10:36:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:36:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 10:36:58,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:36:58,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764868106] [2024-10-13 10:36:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764868106] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:36:58,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140828185] [2024-10-13 10:36:58,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:36:58,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:36:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:36:58,967 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:36:58,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 10:36:59,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 10:36:59,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:36:59,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-13 10:36:59,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:36:59,107 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 [2024-10-13 10:36:59,120 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 [2024-10-13 10:36:59,255 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 10:36:59,256 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 [2024-10-13 10:36:59,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-13 10:37:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-13 10:37:08,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:37:09,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140828185] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:37:09,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 10:37:09,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 27 [2024-10-13 10:37:09,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389893845] [2024-10-13 10:37:09,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 10:37:09,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-13 10:37:09,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:09,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-13 10:37:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=942, Unknown=2, NotChecked=0, Total=1122 [2024-10-13 10:37:09,229 INFO L87 Difference]: Start difference. First operand 132 states and 153 transitions. Second operand has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-13 10:37:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:57,433 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2024-10-13 10:37:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 10:37:57,434 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2024-10-13 10:37:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:57,437 INFO L225 Difference]: With dead ends: 142 [2024-10-13 10:37:57,437 INFO L226 Difference]: Without dead ends: 142 [2024-10-13 10:37:57,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=441, Invalid=2000, Unknown=9, NotChecked=0, Total=2450 [2024-10-13 10:37:57,438 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 199 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:57,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 374 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-13 10:37:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-10-13 10:37:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2024-10-13 10:37:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 83 states have (on average 1.3855421686746987) internal successors, (115), 105 states have internal predecessors, (115), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-13 10:37:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2024-10-13 10:37:57,443 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 36 [2024-10-13 10:37:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:57,444 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2024-10-13 10:37:57,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-13 10:37:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2024-10-13 10:37:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-13 10:37:57,444 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:57,445 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:37:57,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-13 10:37:57,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 10:37:57,649 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:37:57,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:57,649 INFO L85 PathProgramCache]: Analyzing trace with hash -95867863, now seen corresponding path program 1 times [2024-10-13 10:37:57,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:57,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968110625] [2024-10-13 10:37:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:57,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:57,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:37:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:57,726 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 10:37:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:57,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 10:37:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:57,736 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 10:37:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:57,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-13 10:37:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 10:37:57,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:57,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968110625] [2024-10-13 10:37:57,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968110625] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:57,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:57,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 10:37:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081238523] [2024-10-13 10:37:57,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:57,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 10:37:57,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 10:37:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:37:57,747 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-13 10:37:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:57,916 INFO L93 Difference]: Finished difference Result 135 states and 157 transitions. [2024-10-13 10:37:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:37:57,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-10-13 10:37:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:57,918 INFO L225 Difference]: With dead ends: 135 [2024-10-13 10:37:57,918 INFO L226 Difference]: Without dead ends: 135 [2024-10-13 10:37:57,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:37:57,918 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 58 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:57,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 194 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:37:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-13 10:37:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2024-10-13 10:37:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 100 states have internal predecessors, (110), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-10-13 10:37:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2024-10-13 10:37:57,926 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 42 [2024-10-13 10:37:57,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:57,927 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2024-10-13 10:37:57,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-13 10:37:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2024-10-13 10:37:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-13 10:37:57,928 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:57,928 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:37:57,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-13 10:37:57,928 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:37:57,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:57,929 INFO L85 PathProgramCache]: Analyzing trace with hash -95867862, now seen corresponding path program 1 times [2024-10-13 10:37:57,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:57,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946407993] [2024-10-13 10:37:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:57,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:58,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:37:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:58,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 10:37:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:58,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 10:37:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:58,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 10:37:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:58,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-13 10:37:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:37:58,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:58,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946407993] [2024-10-13 10:37:58,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946407993] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:37:58,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146588019] [2024-10-13 10:37:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:58,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:37:58,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:37:58,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:37:58,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 10:37:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:58,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 10:37:58,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:37:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:37:58,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:37:58,634 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 [2024-10-13 10:37:58,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:37:58,688 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 21 treesize of output 25 [2024-10-13 10:37:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:37:58,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146588019] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:37:58,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:37:58,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2024-10-13 10:37:58,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122071498] [2024-10-13 10:37:58,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:37:58,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-13 10:37:58,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:58,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-13 10:37:58,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-10-13 10:37:58,822 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 29 states have internal predecessors, (64), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-10-13 10:37:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:59,530 INFO L93 Difference]: Finished difference Result 167 states and 197 transitions. [2024-10-13 10:37:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-13 10:37:59,531 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 29 states have internal predecessors, (64), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 42 [2024-10-13 10:37:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:59,532 INFO L225 Difference]: With dead ends: 167 [2024-10-13 10:37:59,532 INFO L226 Difference]: Without dead ends: 167 [2024-10-13 10:37:59,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2024-10-13 10:37:59,533 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 122 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:59,534 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 542 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 10:37:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-13 10:37:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 147. [2024-10-13 10:37:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.306930693069307) internal successors, (132), 116 states have internal predecessors, (132), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-13 10:37:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 176 transitions. [2024-10-13 10:37:59,539 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 176 transitions. Word has length 42 [2024-10-13 10:37:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:59,539 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 176 transitions. [2024-10-13 10:37:59,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 29 states have internal predecessors, (64), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-10-13 10:37:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 176 transitions. [2024-10-13 10:37:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-13 10:37:59,540 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:59,540 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:37:59,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 10:37:59,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 10:37:59,741 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:37:59,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1624978001, now seen corresponding path program 2 times [2024-10-13 10:37:59,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:59,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128802704] [2024-10-13 10:37:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:59,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:59,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:37:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:59,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-13 10:37:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:59,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-13 10:37:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:59,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-13 10:37:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 10:37:59,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:59,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128802704] [2024-10-13 10:37:59,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128802704] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:37:59,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048281504] [2024-10-13 10:37:59,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:37:59,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:37:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:37:59,927 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:37:59,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 10:38:00,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:38:00,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:38:00,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 10:38:00,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:38:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 10:38:00,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:38:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:38:00,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048281504] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:38:00,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:38:00,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 12] total 26 [2024-10-13 10:38:00,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774460334] [2024-10-13 10:38:00,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:38:00,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 10:38:00,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:38:00,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 10:38:00,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2024-10-13 10:38:00,480 INFO L87 Difference]: Start difference. First operand 147 states and 176 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-13 10:38:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:38:00,966 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2024-10-13 10:38:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 10:38:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 42 [2024-10-13 10:38:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:38:00,967 INFO L225 Difference]: With dead ends: 169 [2024-10-13 10:38:00,968 INFO L226 Difference]: Without dead ends: 169 [2024-10-13 10:38:00,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 10:38:00,969 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 64 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:38:00,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 748 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:38:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-13 10:38:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 156. [2024-10-13 10:38:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 110 states have (on average 1.290909090909091) internal successors, (142), 125 states have internal predecessors, (142), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-13 10:38:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 186 transitions. [2024-10-13 10:38:00,980 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 186 transitions. Word has length 42 [2024-10-13 10:38:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:38:00,980 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 186 transitions. [2024-10-13 10:38:00,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-13 10:38:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 186 transitions. [2024-10-13 10:38:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-13 10:38:00,980 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:38:00,981 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:38:00,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 10:38:01,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 10:38:01,182 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:38:01,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:38:01,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1934539336, now seen corresponding path program 1 times [2024-10-13 10:38:01,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:38:01,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665361693] [2024-10-13 10:38:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:38:01,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:38:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:01,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:38:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:01,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 10:38:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:01,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 10:38:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:01,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-13 10:38:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:01,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-13 10:38:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:38:01,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:38:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665361693] [2024-10-13 10:38:01,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665361693] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:38:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448038608] [2024-10-13 10:38:01,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:38:01,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:38:01,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:38:01,457 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:38:01,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 10:38:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:01,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-13 10:38:01,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:38:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:38:01,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:38:01,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-13 10:38:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 10:38:02,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448038608] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:38:02,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:38:02,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2024-10-13 10:38:02,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136439404] [2024-10-13 10:38:02,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:38:02,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 10:38:02,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:38:02,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 10:38:02,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-10-13 10:38:02,380 INFO L87 Difference]: Start difference. First operand 156 states and 186 transitions. Second operand has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 27 states have internal predecessors, (68), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-13 10:38:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:38:03,257 INFO L93 Difference]: Finished difference Result 205 states and 250 transitions. [2024-10-13 10:38:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 10:38:03,258 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 27 states have internal predecessors, (68), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 44 [2024-10-13 10:38:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:38:03,259 INFO L225 Difference]: With dead ends: 205 [2024-10-13 10:38:03,260 INFO L226 Difference]: Without dead ends: 205 [2024-10-13 10:38:03,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2024-10-13 10:38:03,261 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 131 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 10:38:03,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 748 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 10:38:03,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-10-13 10:38:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2024-10-13 10:38:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 119 states have (on average 1.2521008403361344) internal successors, (149), 133 states have internal predecessors, (149), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-13 10:38:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 197 transitions. [2024-10-13 10:38:03,271 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 197 transitions. Word has length 44 [2024-10-13 10:38:03,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:38:03,271 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 197 transitions. [2024-10-13 10:38:03,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 27 states have internal predecessors, (68), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-13 10:38:03,271 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 197 transitions. [2024-10-13 10:38:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-13 10:38:03,272 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:38:03,272 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:38:03,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 10:38:03,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:38:03,476 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-13 10:38:03,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:38:03,476 INFO L85 PathProgramCache]: Analyzing trace with hash -92820120, now seen corresponding path program 3 times [2024-10-13 10:38:03,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:38:03,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147989346] [2024-10-13 10:38:03,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:38:03,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:38:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:03,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 10:38:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:03,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-13 10:38:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:03,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-13 10:38:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:03,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-13 10:38:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:38:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 10:38:03,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:38:03,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147989346] [2024-10-13 10:38:03,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147989346] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:38:03,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328184853] [2024-10-13 10:38:03,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:38:03,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:38:03,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:38:03,939 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:38:03,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 10:38:04,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 10:38:04,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:38:04,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-13 10:38:04,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:38:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 10:38:04,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:38:05,328 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 50 treesize of output 46 [2024-10-13 10:38:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-13 10:38:05,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328184853] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:38:05,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:38:05,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 47 [2024-10-13 10:38:05,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544306667] [2024-10-13 10:38:05,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:38:05,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-13 10:38:05,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:38:05,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-13 10:38:05,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2024-10-13 10:38:05,693 INFO L87 Difference]: Start difference. First operand 167 states and 197 transitions. Second operand has 48 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 15 states have call successors, (16), 8 states have call predecessors, (16), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10)