./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 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 17:53:13,678 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 17:53:13,748 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 17:53:13,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 17:53:13,756 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 17:53:13,784 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 17:53:13,784 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 17:53:13,785 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 17:53:13,785 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 17:53:13,785 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 17:53:13,786 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 17:53:13,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 17:53:13,786 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 17:53:13,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 17:53:13,787 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 17:53:13,790 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 17:53:13,791 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 17:53:13,791 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 17:53:13,791 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 17:53:13,791 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 17:53:13,791 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 17:53:13,792 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 17:53:13,792 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 17:53:13,792 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 17:53:13,792 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 17:53:13,793 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 17:53:13,793 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 17:53:13,793 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 17:53:13,793 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 17:53:13,794 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 17:53:13,794 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 17:53:13,794 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 17:53:13,794 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 17:53:13,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:53:13,795 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 17:53:13,795 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 17:53:13,795 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 17:53:13,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 17:53:13,798 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 17:53:13,799 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 17:53:13,799 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 17:53:13,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 17:53:13,802 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2024-10-11 17:53:14,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 17:53:14,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 17:53:14,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 17:53:14,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 17:53:14,025 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 17:53:14,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-10-11 17:53:15,363 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 17:53:15,532 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 17:53:15,533 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-10-11 17:53:15,546 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/1476e3935/69709077c5e74831b64ed10ae2ad2595/FLAG02c17e558 [2024-10-11 17:53:15,568 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/1476e3935/69709077c5e74831b64ed10ae2ad2595 [2024-10-11 17:53:15,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 17:53:15,571 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 17:53:15,577 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 17:53:15,577 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 17:53:15,581 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 17:53:15,585 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28077d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15, skipping insertion in model container [2024-10-11 17:53:15,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,614 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 17:53:15,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:53:15,844 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 17:53:15,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:53:15,882 INFO L204 MainTranslator]: Completed translation [2024-10-11 17:53:15,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15 WrapperNode [2024-10-11 17:53:15,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 17:53:15,884 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 17:53:15,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 17:53:15,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 17:53:15,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,905 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,921 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2024-10-11 17:53:15,921 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 17:53:15,922 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 17:53:15,922 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 17:53:15,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 17:53:15,931 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,933 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,945 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]. [2024-10-11 17:53:15,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,951 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,954 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,955 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,958 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 17:53:15,959 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 17:53:15,959 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 17:53:15,959 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 17:53:15,960 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (1/1) ... [2024-10-11 17:53:15,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:53:15,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:15,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 17:53:15,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 17:53:16,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 17:53:16,022 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 17:53:16,022 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 17:53:16,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 17:53:16,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 17:53:16,023 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-10-11 17:53:16,023 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-10-11 17:53:16,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 17:53:16,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 17:53:16,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 17:53:16,023 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-10-11 17:53:16,023 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-10-11 17:53:16,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 17:53:16,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 17:53:16,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 17:53:16,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 17:53:16,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-10-11 17:53:16,024 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-10-11 17:53:16,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 17:53:16,092 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 17:53:16,094 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 17:53:16,405 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-10-11 17:53:16,405 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 17:53:16,446 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 17:53:16,447 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 17:53:16,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:53:16 BoogieIcfgContainer [2024-10-11 17:53:16,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 17:53:16,450 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 17:53:16,450 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 17:53:16,453 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 17:53:16,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 05:53:15" (1/3) ... [2024-10-11 17:53:16,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258e8eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:53:16, skipping insertion in model container [2024-10-11 17:53:16,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:53:15" (2/3) ... [2024-10-11 17:53:16,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258e8eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:53:16, skipping insertion in model container [2024-10-11 17:53:16,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:53:16" (3/3) ... [2024-10-11 17:53:16,456 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2024-10-11 17:53:16,468 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 17:53:16,469 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-10-11 17:53:16,502 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 17:53:16,506 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;@20d6eae3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 17:53:16,507 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-10-11 17:53:16,510 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) [2024-10-11 17:53:16,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 17:53:16,518 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:16,519 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] [2024-10-11 17:53:16,519 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:16,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1534891119, now seen corresponding path program 1 times [2024-10-11 17:53:16,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:16,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786776824] [2024-10-11 17:53:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:16,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:16,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786776824] [2024-10-11 17:53:16,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786776824] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:16,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:16,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:53:16,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820207800] [2024-10-11 17:53:16,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:16,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:53:16,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:16,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:53:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:53:16,779 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) [2024-10-11 17:53:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:16,879 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2024-10-11 17:53:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:53:16,881 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 [2024-10-11 17:53:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:16,887 INFO L225 Difference]: With dead ends: 103 [2024-10-11 17:53:16,887 INFO L226 Difference]: Without dead ends: 102 [2024-10-11 17:53:16,888 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 [2024-10-11 17:53:16,891 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 [2024-10-11 17:53:16,891 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] [2024-10-11 17:53:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-11 17:53:16,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2024-10-11 17:53:16,920 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) [2024-10-11 17:53:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-10-11 17:53:16,923 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 25 [2024-10-11 17:53:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:16,924 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-10-11 17:53:16,924 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) [2024-10-11 17:53:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-10-11 17:53:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 17:53:16,926 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:16,926 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] [2024-10-11 17:53:16,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 17:53:16,926 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:16,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:16,927 INFO L85 PathProgramCache]: Analyzing trace with hash 742628587, now seen corresponding path program 1 times [2024-10-11 17:53:16,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:16,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912975753] [2024-10-11 17:53:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:16,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,117 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,123 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:17,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:17,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912975753] [2024-10-11 17:53:17,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912975753] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:17,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:17,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:53:17,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776001211] [2024-10-11 17:53:17,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:17,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:53:17,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:17,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:53:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:53:17,130 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) [2024-10-11 17:53:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:17,283 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2024-10-11 17:53:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:53:17,284 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 [2024-10-11 17:53:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:17,285 INFO L225 Difference]: With dead ends: 99 [2024-10-11 17:53:17,285 INFO L226 Difference]: Without dead ends: 99 [2024-10-11 17:53:17,285 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 [2024-10-11 17:53:17,286 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:17,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 201 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:53:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-11 17:53:17,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2024-10-11 17:53:17,297 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) [2024-10-11 17:53:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2024-10-11 17:53:17,298 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 25 [2024-10-11 17:53:17,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:17,299 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2024-10-11 17:53:17,300 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) [2024-10-11 17:53:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2024-10-11 17:53:17,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 17:53:17,302 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:17,302 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] [2024-10-11 17:53:17,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 17:53:17,302 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:17,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash 742628588, now seen corresponding path program 1 times [2024-10-11 17:53:17,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:17,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850614212] [2024-10-11 17:53:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:17,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,786 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 17:53:17,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850614212] [2024-10-11 17:53:17,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850614212] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:17,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:17,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-11 17:53:17,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324047188] [2024-10-11 17:53:17,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:17,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 17:53:17,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 17:53:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-11 17:53:17,854 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) [2024-10-11 17:53:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:18,182 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2024-10-11 17:53:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 17:53:18,183 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 [2024-10-11 17:53:18,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:18,183 INFO L225 Difference]: With dead ends: 105 [2024-10-11 17:53:18,183 INFO L226 Difference]: Without dead ends: 105 [2024-10-11 17:53:18,184 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 [2024-10-11 17:53:18,185 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, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:18,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 485 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:53:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-11 17:53:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2024-10-11 17:53:18,190 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) [2024-10-11 17:53:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2024-10-11 17:53:18,191 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 25 [2024-10-11 17:53:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:18,191 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2024-10-11 17:53:18,191 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) [2024-10-11 17:53:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2024-10-11 17:53:18,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 17:53:18,192 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:18,192 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:53:18,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 17:53:18,192 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:18,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1546649782, now seen corresponding path program 1 times [2024-10-11 17:53:18,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:18,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893937018] [2024-10-11 17:53:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:18,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:18,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:18,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893937018] [2024-10-11 17:53:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893937018] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:18,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:18,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 17:53:18,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061369229] [2024-10-11 17:53:18,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:18,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 17:53:18,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 17:53:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-11 17:53:18,550 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) [2024-10-11 17:53:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:18,794 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2024-10-11 17:53:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:53:18,794 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 [2024-10-11 17:53:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:18,795 INFO L225 Difference]: With dead ends: 102 [2024-10-11 17:53:18,795 INFO L226 Difference]: Without dead ends: 102 [2024-10-11 17:53:18,795 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 [2024-10-11 17:53:18,796 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, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:18,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 354 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:53:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-11 17:53:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2024-10-11 17:53:18,800 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) [2024-10-11 17:53:18,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2024-10-11 17:53:18,801 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 26 [2024-10-11 17:53:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:18,802 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2024-10-11 17:53:18,802 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) [2024-10-11 17:53:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2024-10-11 17:53:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 17:53:18,802 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:18,802 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:53:18,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 17:53:18,803 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:18,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:18,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1546649781, now seen corresponding path program 1 times [2024-10-11 17:53:18,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:18,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297129030] [2024-10-11 17:53:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:18,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,858 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,871 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:53:18,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:18,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297129030] [2024-10-11 17:53:18,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297129030] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:18,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:18,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:53:18,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788484061] [2024-10-11 17:53:18,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:18,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:53:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:18,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:53:18,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:53:18,884 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) [2024-10-11 17:53:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:19,010 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2024-10-11 17:53:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:53:19,013 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 [2024-10-11 17:53:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:19,014 INFO L225 Difference]: With dead ends: 101 [2024-10-11 17:53:19,014 INFO L226 Difference]: Without dead ends: 101 [2024-10-11 17:53:19,014 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 [2024-10-11 17:53:19,015 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 [2024-10-11 17:53:19,015 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] [2024-10-11 17:53:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-11 17:53:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2024-10-11 17:53:19,023 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) [2024-10-11 17:53:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2024-10-11 17:53:19,023 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 26 [2024-10-11 17:53:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:19,023 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2024-10-11 17:53:19,024 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) [2024-10-11 17:53:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2024-10-11 17:53:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-11 17:53:19,024 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:19,024 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] [2024-10-11 17:53:19,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 17:53:19,024 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:19,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:19,025 INFO L85 PathProgramCache]: Analyzing trace with hash 272355240, now seen corresponding path program 1 times [2024-10-11 17:53:19,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:19,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813439579] [2024-10-11 17:53:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:19,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,155 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,178 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 17:53:19,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:19,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813439579] [2024-10-11 17:53:19,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813439579] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:19,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:19,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-11 17:53:19,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525568420] [2024-10-11 17:53:19,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:19,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 17:53:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:19,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 17:53:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-11 17:53:19,184 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) [2024-10-11 17:53:19,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:19,319 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-10-11 17:53:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:53:19,320 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 [2024-10-11 17:53:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:19,320 INFO L225 Difference]: With dead ends: 103 [2024-10-11 17:53:19,320 INFO L226 Difference]: Without dead ends: 103 [2024-10-11 17:53:19,320 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 [2024-10-11 17:53:19,321 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 [2024-10-11 17:53:19,321 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] [2024-10-11 17:53:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-11 17:53:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2024-10-11 17:53:19,328 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) [2024-10-11 17:53:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-10-11 17:53:19,329 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 28 [2024-10-11 17:53:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:19,329 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-10-11 17:53:19,329 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) [2024-10-11 17:53:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-10-11 17:53:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-11 17:53:19,330 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:19,330 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] [2024-10-11 17:53:19,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 17:53:19,330 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:19,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash 271845459, now seen corresponding path program 1 times [2024-10-11 17:53:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:19,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743580113] [2024-10-11 17:53:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-11 17:53:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-11 17:53:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-11 17:53:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 17:53:19,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:19,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743580113] [2024-10-11 17:53:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743580113] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:19,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817168913] [2024-10-11 17:53:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:19,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:19,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:19,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:19,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 17:53:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:19,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 17:53:19,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:53:19,705 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:53:19,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817168913] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:19,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:53:19,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2024-10-11 17:53:19,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456349727] [2024-10-11 17:53:19,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:19,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:53:19,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:19,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:53:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-10-11 17:53:19,708 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) [2024-10-11 17:53:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:19,792 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2024-10-11 17:53:19,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:53:19,792 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 [2024-10-11 17:53:19,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:19,793 INFO L225 Difference]: With dead ends: 95 [2024-10-11 17:53:19,793 INFO L226 Difference]: Without dead ends: 93 [2024-10-11 17:53:19,793 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 [2024-10-11 17:53:19,794 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 [2024-10-11 17:53:19,794 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] [2024-10-11 17:53:19,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-11 17:53:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-10-11 17:53:19,802 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) [2024-10-11 17:53:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-10-11 17:53:19,803 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 28 [2024-10-11 17:53:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:19,803 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-10-11 17:53:19,804 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) [2024-10-11 17:53:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-10-11 17:53:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 17:53:19,804 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:19,804 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] [2024-10-11 17:53:19,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:20,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:20,009 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:20,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:20,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2110535227, now seen corresponding path program 1 times [2024-10-11 17:53:20,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:20,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959659433] [2024-10-11 17:53:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,388 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 17:53:20,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:20,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959659433] [2024-10-11 17:53:20,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959659433] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:20,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717283609] [2024-10-11 17:53:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:20,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:20,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:20,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:20,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 17:53:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:20,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 17:53:20,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:20,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 17:53:20,633 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 [2024-10-11 17:53:20,836 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 17:53:20,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 17:53:20,843 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 [2024-10-11 17:53:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 17:53:21,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:21,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717283609] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:21,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:53:21,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2024-10-11 17:53:21,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560980986] [2024-10-11 17:53:21,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:21,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 17:53:21,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:21,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 17:53:21,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2024-10-11 17:53:21,652 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) [2024-10-11 17:53:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:22,723 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2024-10-11 17:53:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 17:53:22,727 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 [2024-10-11 17:53:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:22,727 INFO L225 Difference]: With dead ends: 107 [2024-10-11 17:53:22,727 INFO L226 Difference]: Without dead ends: 107 [2024-10-11 17:53:22,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2024-10-11 17:53:22,728 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 228 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:22,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 352 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 17:53:22,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-11 17:53:22,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2024-10-11 17:53:22,734 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) [2024-10-11 17:53:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2024-10-11 17:53:22,735 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 29 [2024-10-11 17:53:22,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:22,735 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2024-10-11 17:53:22,735 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) [2024-10-11 17:53:22,735 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2024-10-11 17:53:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-11 17:53:22,736 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:22,736 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] [2024-10-11 17:53:22,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 17:53:22,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:22,937 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:22,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:22,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1002082631, now seen corresponding path program 1 times [2024-10-11 17:53:22,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:22,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108223081] [2024-10-11 17:53:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:22,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:23,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:23,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108223081] [2024-10-11 17:53:23,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108223081] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:23,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991952872] [2024-10-11 17:53:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:23,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:23,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:23,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:23,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 17:53:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:23,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 17:53:23,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:23,238 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 [2024-10-11 17:53:23,317 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-11 17:53:23,317 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 [2024-10-11 17:53:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:23,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:23,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991952872] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:23,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:53:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-10-11 17:53:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353896288] [2024-10-11 17:53:23,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:23,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 17:53:23,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 17:53:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-10-11 17:53:23,859 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) [2024-10-11 17:53:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:24,657 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2024-10-11 17:53:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:53:24,658 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 [2024-10-11 17:53:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:24,658 INFO L225 Difference]: With dead ends: 103 [2024-10-11 17:53:24,658 INFO L226 Difference]: Without dead ends: 103 [2024-10-11 17:53:24,659 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-10-11 17:53:24,659 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, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:24,659 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 453 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 17:53:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-11 17:53:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2024-10-11 17:53:24,662 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) [2024-10-11 17:53:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2024-10-11 17:53:24,662 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 30 [2024-10-11 17:53:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:24,662 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2024-10-11 17:53:24,663 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) [2024-10-11 17:53:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2024-10-11 17:53:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-11 17:53:24,663 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:24,663 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] [2024-10-11 17:53:24,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 17:53:24,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:24,864 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:24,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:24,865 INFO L85 PathProgramCache]: Analyzing trace with hash 928823460, now seen corresponding path program 2 times [2024-10-11 17:53:24,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:24,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857636305] [2024-10-11 17:53:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:24,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,099 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 17:53:25,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:25,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857636305] [2024-10-11 17:53:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857636305] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:25,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181021695] [2024-10-11 17:53:25,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:53:25,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:25,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:25,135 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:25,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 17:53:25,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:53:25,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:53:25,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-11 17:53:25,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:25,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 17:53:25,251 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 [2024-10-11 17:53:25,374 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 17:53:25,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 17:53:25,379 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 [2024-10-11 17:53:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 17:53:25,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:25,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181021695] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:25,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:53:25,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2024-10-11 17:53:25,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193222201] [2024-10-11 17:53:25,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:25,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 17:53:25,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:25,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 17:53:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2024-10-11 17:53:25,884 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) [2024-10-11 17:53:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:26,884 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2024-10-11 17:53:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 17:53:26,885 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 [2024-10-11 17:53:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:26,886 INFO L225 Difference]: With dead ends: 126 [2024-10-11 17:53:26,886 INFO L226 Difference]: Without dead ends: 126 [2024-10-11 17:53:26,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2024-10-11 17:53:26,887 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 240 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:26,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 489 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:53:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-11 17:53:26,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2024-10-11 17:53:26,890 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) [2024-10-11 17:53:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2024-10-11 17:53:26,891 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 32 [2024-10-11 17:53:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:26,891 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2024-10-11 17:53:26,891 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) [2024-10-11 17:53:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2024-10-11 17:53:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 17:53:26,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:26,892 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] [2024-10-11 17:53:26,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 17:53:27,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 17:53:27,093 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:27,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:27,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1893959440, now seen corresponding path program 1 times [2024-10-11 17:53:27,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:27,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956893361] [2024-10-11 17:53:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:27,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:27,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956893361] [2024-10-11 17:53:27,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956893361] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:27,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489299871] [2024-10-11 17:53:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:27,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:27,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:27,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:27,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 17:53:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:27,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-11 17:53:27,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:27,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:27,852 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 [2024-10-11 17:53:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:28,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489299871] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:28,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:28,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-10-11 17:53:28,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076160967] [2024-10-11 17:53:28,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:28,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-11 17:53:28,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:28,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-11 17:53:28,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2024-10-11 17:53:28,074 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) [2024-10-11 17:53:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:29,006 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2024-10-11 17:53:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 17:53:29,007 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 [2024-10-11 17:53:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:29,008 INFO L225 Difference]: With dead ends: 171 [2024-10-11 17:53:29,008 INFO L226 Difference]: Without dead ends: 171 [2024-10-11 17:53:29,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=2564, Unknown=0, NotChecked=0, Total=2970 [2024-10-11 17:53:29,009 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 207 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:29,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1005 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:53:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-10-11 17:53:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2024-10-11 17:53:29,012 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) [2024-10-11 17:53:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2024-10-11 17:53:29,013 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 35 [2024-10-11 17:53:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:29,013 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2024-10-11 17:53:29,014 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) [2024-10-11 17:53:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2024-10-11 17:53:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 17:53:29,014 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:29,014 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] [2024-10-11 17:53:29,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 17:53:29,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 17:53:29,215 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting upsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:29,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:29,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1893959441, now seen corresponding path program 1 times [2024-10-11 17:53:29,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:29,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819185786] [2024-10-11 17:53:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:29,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:53:29,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:29,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819185786] [2024-10-11 17:53:29,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819185786] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:53:29,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:53:29,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:53:29,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80577886] [2024-10-11 17:53:29,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:53:29,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:53:29,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:29,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:53:29,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:53:29,283 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) [2024-10-11 17:53:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:29,417 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2024-10-11 17:53:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 17:53:29,417 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 [2024-10-11 17:53:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:29,418 INFO L225 Difference]: With dead ends: 140 [2024-10-11 17:53:29,418 INFO L226 Difference]: Without dead ends: 140 [2024-10-11 17:53:29,418 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 [2024-10-11 17:53:29,418 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 [2024-10-11 17:53:29,419 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] [2024-10-11 17:53:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-11 17:53:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2024-10-11 17:53:29,422 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) [2024-10-11 17:53:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 156 transitions. [2024-10-11 17:53:29,422 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 156 transitions. Word has length 35 [2024-10-11 17:53:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:29,423 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 156 transitions. [2024-10-11 17:53:29,423 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) [2024-10-11 17:53:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 156 transitions. [2024-10-11 17:53:29,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-11 17:53:29,424 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:29,424 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] [2024-10-11 17:53:29,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 17:53:29,424 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:29,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:29,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1416799493, now seen corresponding path program 1 times [2024-10-11 17:53:29,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:29,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806476676] [2024-10-11 17:53:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:29,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,767 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:29,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:29,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806476676] [2024-10-11 17:53:29,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806476676] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:29,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319423291] [2024-10-11 17:53:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:29,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:29,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:29,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:29,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 17:53:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:29,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 17:53:29,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:30,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:30,186 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 [2024-10-11 17:53:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:30,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319423291] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:30,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:30,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-10-11 17:53:30,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186601864] [2024-10-11 17:53:30,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:30,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 17:53:30,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:30,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 17:53:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 17:53:30,289 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) [2024-10-11 17:53:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:30,915 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2024-10-11 17:53:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 17:53:30,918 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 [2024-10-11 17:53:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:30,919 INFO L225 Difference]: With dead ends: 151 [2024-10-11 17:53:30,919 INFO L226 Difference]: Without dead ends: 151 [2024-10-11 17:53:30,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-10-11 17:53:30,920 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, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:53:30,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 732 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:53:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-10-11 17:53:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 125. [2024-10-11 17:53:30,928 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) [2024-10-11 17:53:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2024-10-11 17:53:30,928 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 36 [2024-10-11 17:53:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:30,928 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2024-10-11 17:53:30,928 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) [2024-10-11 17:53:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2024-10-11 17:53:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 17:53:30,929 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:30,929 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] [2024-10-11 17:53:30,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 17:53:31,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 17:53:31,130 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:31,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:31,131 INFO L85 PathProgramCache]: Analyzing trace with hash 38534880, now seen corresponding path program 1 times [2024-10-11 17:53:31,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:31,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802270057] [2024-10-11 17:53:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:31,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,320 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:53:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:53:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:53:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:31,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:31,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802270057] [2024-10-11 17:53:31,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802270057] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:31,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792039093] [2024-10-11 17:53:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:31,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:31,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:31,350 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:31,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 17:53:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:31,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 17:53:31,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:31,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:53:31,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792039093] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:53:31,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:53:31,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-10-11 17:53:31,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858243128] [2024-10-11 17:53:31,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:31,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 17:53:31,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 17:53:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-10-11 17:53:31,589 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) [2024-10-11 17:53:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:53:31,818 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2024-10-11 17:53:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 17:53:31,819 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 [2024-10-11 17:53:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:53:31,820 INFO L225 Difference]: With dead ends: 146 [2024-10-11 17:53:31,820 INFO L226 Difference]: Without dead ends: 146 [2024-10-11 17:53:31,820 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 [2024-10-11 17:53:31,821 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 41 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-10-11 17:53:31,822 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] [2024-10-11 17:53:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-11 17:53:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2024-10-11 17:53:31,827 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) [2024-10-11 17:53:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2024-10-11 17:53:31,828 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 38 [2024-10-11 17:53:31,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:53:31,830 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2024-10-11 17:53:31,830 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) [2024-10-11 17:53:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2024-10-11 17:53:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-11 17:53:31,830 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:53:31,830 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] [2024-10-11 17:53:31,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 17:53:32,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:32,031 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:53:32,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:53:32,032 INFO L85 PathProgramCache]: Analyzing trace with hash -546271565, now seen corresponding path program 3 times [2024-10-11 17:53:32,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:53:32,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033028815] [2024-10-11 17:53:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:53:32,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:53:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,519 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:53:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 17:53:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 17:53:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 17:53:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:53:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 17:53:32,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:53:32,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033028815] [2024-10-11 17:53:32,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033028815] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:32,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998645743] [2024-10-11 17:53:32,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:53:32,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:53:32,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:53:32,578 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:53:32,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 17:53:32,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 17:53:32,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:53:32,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-11 17:53:32,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:53:32,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 17:53:32,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:53:32,802 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 17:53:32,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 17:53:32,807 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 [2024-10-11 17:53:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-11 17:53:37,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:53:37,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998645743] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:53:37,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:53:37,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 27 [2024-10-11 17:53:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446198139] [2024-10-11 17:53:37,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:53:37,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-11 17:53:37,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:53:37,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-11 17:53:37,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=943, Unknown=1, NotChecked=0, Total=1122 [2024-10-11 17:53:37,774 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) [2024-10-11 17:53:42,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 17:54:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:02,409 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2024-10-11 17:54:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 17:54:02,409 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 [2024-10-11 17:54:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:02,413 INFO L225 Difference]: With dead ends: 142 [2024-10-11 17:54:02,413 INFO L226 Difference]: Without dead ends: 142 [2024-10-11 17:54:02,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=448, Invalid=2001, Unknown=1, NotChecked=0, Total=2450 [2024-10-11 17:54:02,417 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 181 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:02,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 374 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 835 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2024-10-11 17:54:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-10-11 17:54:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2024-10-11 17:54:02,420 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) [2024-10-11 17:54:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2024-10-11 17:54:02,421 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 36 [2024-10-11 17:54:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:02,421 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2024-10-11 17:54:02,421 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) [2024-10-11 17:54:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2024-10-11 17:54:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-11 17:54:02,422 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:02,422 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] [2024-10-11 17:54:02,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 17:54:02,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-11 17:54:02,627 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:02,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:02,627 INFO L85 PathProgramCache]: Analyzing trace with hash -95867863, now seen corresponding path program 1 times [2024-10-11 17:54:02,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:02,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910788089] [2024-10-11 17:54:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:02,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:02,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:02,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:02,685 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:02,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:02,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:02,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:02,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910788089] [2024-10-11 17:54:02,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910788089] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:54:02,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:54:02,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:54:02,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537748210] [2024-10-11 17:54:02,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:54:02,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:54:02,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:02,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:54:02,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:54:02,696 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) [2024-10-11 17:54:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:02,836 INFO L93 Difference]: Finished difference Result 135 states and 157 transitions. [2024-10-11 17:54:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 17:54:02,837 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 [2024-10-11 17:54:02,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:02,837 INFO L225 Difference]: With dead ends: 135 [2024-10-11 17:54:02,837 INFO L226 Difference]: Without dead ends: 135 [2024-10-11 17:54:02,838 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 [2024-10-11 17:54:02,838 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 [2024-10-11 17:54:02,838 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] [2024-10-11 17:54:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-11 17:54:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2024-10-11 17:54:02,845 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) [2024-10-11 17:54:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2024-10-11 17:54:02,847 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 42 [2024-10-11 17:54:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:02,848 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2024-10-11 17:54:02,848 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) [2024-10-11 17:54:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2024-10-11 17:54:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-11 17:54:02,848 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:02,848 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] [2024-10-11 17:54:02,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-11 17:54:02,848 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:02,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:02,849 INFO L85 PathProgramCache]: Analyzing trace with hash -95867862, now seen corresponding path program 1 times [2024-10-11 17:54:02,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:02,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578981538] [2024-10-11 17:54:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:02,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:03,067 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:03,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:03,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:03,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:03,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:03,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:03,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578981538] [2024-10-11 17:54:03,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578981538] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:03,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739214193] [2024-10-11 17:54:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:03,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:03,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:03,195 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:03,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 17:54:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:03,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 17:54:03,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:03,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:03,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-10-11 17:54:03,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 17:54:03,631 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 [2024-10-11 17:54:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:03,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739214193] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:03,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:03,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2024-10-11 17:54:03,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573934218] [2024-10-11 17:54:03,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:03,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 17:54:03,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:03,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 17:54:03,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 17:54:03,760 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) [2024-10-11 17:54:04,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:04,512 INFO L93 Difference]: Finished difference Result 167 states and 197 transitions. [2024-10-11 17:54:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 17:54:04,512 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 [2024-10-11 17:54:04,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:04,513 INFO L225 Difference]: With dead ends: 167 [2024-10-11 17:54:04,513 INFO L226 Difference]: Without dead ends: 167 [2024-10-11 17:54:04,514 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 [2024-10-11 17:54:04,514 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 126 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:04,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 629 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:54:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-11 17:54:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 147. [2024-10-11 17:54:04,518 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) [2024-10-11 17:54:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 176 transitions. [2024-10-11 17:54:04,519 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 176 transitions. Word has length 42 [2024-10-11 17:54:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:04,519 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 176 transitions. [2024-10-11 17:54:04,519 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) [2024-10-11 17:54:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 176 transitions. [2024-10-11 17:54:04,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-11 17:54:04,520 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:04,520 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] [2024-10-11 17:54:04,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 17:54:04,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 17:54:04,720 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:04,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1624978001, now seen corresponding path program 2 times [2024-10-11 17:54:04,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:04,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16340321] [2024-10-11 17:54:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:04,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:04,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:04,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 17:54:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:04,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 17:54:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:04,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 17:54:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:04,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16340321] [2024-10-11 17:54:04,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16340321] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277092268] [2024-10-11 17:54:04,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:54:04,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:04,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:04,850 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:04,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 17:54:04,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:54:04,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:54:04,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 17:54:04,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:05,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:05,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277092268] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:05,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:05,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 12] total 26 [2024-10-11 17:54:05,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390508471] [2024-10-11 17:54:05,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:05,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 17:54:05,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:05,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 17:54:05,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2024-10-11 17:54:05,380 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) [2024-10-11 17:54:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:05,775 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2024-10-11 17:54:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 17:54:05,775 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 [2024-10-11 17:54:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:05,777 INFO L225 Difference]: With dead ends: 169 [2024-10-11 17:54:05,777 INFO L226 Difference]: Without dead ends: 169 [2024-10-11 17:54:05,777 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 [2024-10-11 17:54:05,779 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 80 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:05,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 601 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:54:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-11 17:54:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 156. [2024-10-11 17:54:05,786 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) [2024-10-11 17:54:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 186 transitions. [2024-10-11 17:54:05,787 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 186 transitions. Word has length 42 [2024-10-11 17:54:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:05,787 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 186 transitions. [2024-10-11 17:54:05,787 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) [2024-10-11 17:54:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 186 transitions. [2024-10-11 17:54:05,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-11 17:54:05,788 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:05,788 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] [2024-10-11 17:54:05,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 17:54:05,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 17:54:05,989 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:05,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1934539336, now seen corresponding path program 1 times [2024-10-11 17:54:05,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:05,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734560329] [2024-10-11 17:54:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:06,174 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:06,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:06,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:06,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:06,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:06,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:06,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734560329] [2024-10-11 17:54:06,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734560329] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:06,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214280352] [2024-10-11 17:54:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:06,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:06,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:06,195 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:06,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 17:54:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:06,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 17:54:06,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:06,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:06,499 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 [2024-10-11 17:54:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:06,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214280352] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:06,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:06,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2024-10-11 17:54:06,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672566913] [2024-10-11 17:54:06,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:06,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 17:54:06,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:06,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 17:54:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-10-11 17:54:06,996 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) [2024-10-11 17:54:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:07,751 INFO L93 Difference]: Finished difference Result 205 states and 250 transitions. [2024-10-11 17:54:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 17:54:07,751 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 [2024-10-11 17:54:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:07,752 INFO L225 Difference]: With dead ends: 205 [2024-10-11 17:54:07,752 INFO L226 Difference]: Without dead ends: 205 [2024-10-11 17:54:07,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2024-10-11 17:54:07,753 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 144 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:07,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 753 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:54:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-10-11 17:54:07,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2024-10-11 17:54:07,768 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) [2024-10-11 17:54:07,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 197 transitions. [2024-10-11 17:54:07,770 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 197 transitions. Word has length 44 [2024-10-11 17:54:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:07,770 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 197 transitions. [2024-10-11 17:54:07,771 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) [2024-10-11 17:54:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 197 transitions. [2024-10-11 17:54:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 17:54:07,772 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:07,772 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] [2024-10-11 17:54:07,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 17:54:07,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:07,976 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:07,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash -92820120, now seen corresponding path program 3 times [2024-10-11 17:54:07,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:07,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884874809] [2024-10-11 17:54:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:07,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:08,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:08,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 17:54:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:08,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 17:54:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:08,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 17:54:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:08,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:08,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884874809] [2024-10-11 17:54:08,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884874809] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:08,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390293701] [2024-10-11 17:54:08,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:54:08,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:08,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:08,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:08,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 17:54:08,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 17:54:08,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:54:08,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-11 17:54:08,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-11 17:54:09,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:09,580 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 [2024-10-11 17:54:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-11 17:54:09,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390293701] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:09,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:09,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 47 [2024-10-11 17:54:09,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326537710] [2024-10-11 17:54:09,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:09,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-11 17:54:09,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:09,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-11 17:54:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2024-10-11 17:54:09,882 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) [2024-10-11 17:54:12,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:12,258 INFO L93 Difference]: Finished difference Result 195 states and 228 transitions. [2024-10-11 17:54:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-11 17:54:12,258 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 45 [2024-10-11 17:54:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:12,259 INFO L225 Difference]: With dead ends: 195 [2024-10-11 17:54:12,259 INFO L226 Difference]: Without dead ends: 195 [2024-10-11 17:54:12,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=667, Invalid=5653, Unknown=0, NotChecked=0, Total=6320 [2024-10-11 17:54:12,260 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 127 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:12,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1082 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-11 17:54:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-10-11 17:54:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2024-10-11 17:54:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 125 states have (on average 1.256) internal successors, (157), 139 states have internal predecessors, (157), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-11 17:54:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 209 transitions. [2024-10-11 17:54:12,264 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 209 transitions. Word has length 45 [2024-10-11 17:54:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:12,265 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 209 transitions. [2024-10-11 17:54:12,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-10-11 17:54:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 209 transitions. [2024-10-11 17:54:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-11 17:54:12,265 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:12,265 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, 1] [2024-10-11 17:54:12,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 17:54:12,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:12,470 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:12,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1417543565, now seen corresponding path program 1 times [2024-10-11 17:54:12,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:12,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776035734] [2024-10-11 17:54:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:12,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:12,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:12,901 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 17:54:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:12,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 17:54:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:12,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 17:54:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:12,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:12,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776035734] [2024-10-11 17:54:12,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776035734] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:12,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402385821] [2024-10-11 17:54:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:12,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:12,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:12,933 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:12,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 17:54:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:13,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-11 17:54:13,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:13,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:14,094 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 79 treesize of output 73 [2024-10-11 17:54:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:14,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402385821] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:14,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:14,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 15] total 48 [2024-10-11 17:54:14,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095580814] [2024-10-11 17:54:14,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:14,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-11 17:54:14,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:14,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-11 17:54:14,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2024-10-11 17:54:14,523 INFO L87 Difference]: Start difference. First operand 176 states and 209 transitions. Second operand has 49 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 42 states have internal predecessors, (81), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-11 17:54:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:17,574 INFO L93 Difference]: Finished difference Result 275 states and 324 transitions. [2024-10-11 17:54:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-10-11 17:54:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 42 states have internal predecessors, (81), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 46 [2024-10-11 17:54:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:17,576 INFO L225 Difference]: With dead ends: 275 [2024-10-11 17:54:17,576 INFO L226 Difference]: Without dead ends: 275 [2024-10-11 17:54:17,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1172, Invalid=11484, Unknown=0, NotChecked=0, Total=12656 [2024-10-11 17:54:17,583 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 259 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:17,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1250 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-11 17:54:17,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-10-11 17:54:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 233. [2024-10-11 17:54:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 178 states have internal predecessors, (205), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-10-11 17:54:17,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 283 transitions. [2024-10-11 17:54:17,597 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 283 transitions. Word has length 46 [2024-10-11 17:54:17,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:17,597 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 283 transitions. [2024-10-11 17:54:17,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 42 states have internal predecessors, (81), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-11 17:54:17,597 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 283 transitions. [2024-10-11 17:54:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-11 17:54:17,598 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:17,598 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:17,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 17:54:17,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:17,799 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:17,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:17,799 INFO L85 PathProgramCache]: Analyzing trace with hash 753588072, now seen corresponding path program 4 times [2024-10-11 17:54:17,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:17,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214390352] [2024-10-11 17:54:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:17,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:18,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:18,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 17:54:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:18,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 17:54:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:18,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 17:54:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:18,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:18,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214390352] [2024-10-11 17:54:18,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214390352] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:18,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482693604] [2024-10-11 17:54:18,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:54:18,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:18,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:18,118 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:18,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 17:54:18,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:54:18,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:54:18,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 17:54:18,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:18,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:19,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482693604] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:19,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:19,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2024-10-11 17:54:19,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954494335] [2024-10-11 17:54:19,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:19,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 17:54:19,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 17:54:19,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2024-10-11 17:54:19,127 INFO L87 Difference]: Start difference. First operand 233 states and 283 transitions. Second operand has 32 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 8 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-11 17:54:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:19,894 INFO L93 Difference]: Finished difference Result 276 states and 324 transitions. [2024-10-11 17:54:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-11 17:54:19,894 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 8 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2024-10-11 17:54:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:19,895 INFO L225 Difference]: With dead ends: 276 [2024-10-11 17:54:19,895 INFO L226 Difference]: Without dead ends: 276 [2024-10-11 17:54:19,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2024-10-11 17:54:19,897 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 93 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:19,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 633 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:54:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-10-11 17:54:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2024-10-11 17:54:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 156 states have (on average 1.2435897435897436) internal successors, (194), 171 states have internal predecessors, (194), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2024-10-11 17:54:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 260 transitions. [2024-10-11 17:54:19,902 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 260 transitions. Word has length 48 [2024-10-11 17:54:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:19,902 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 260 transitions. [2024-10-11 17:54:19,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 8 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-11 17:54:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 260 transitions. [2024-10-11 17:54:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-11 17:54:19,903 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:19,903 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:19,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-11 17:54:20,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-11 17:54:20,107 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:20,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:20,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1616791872, now seen corresponding path program 1 times [2024-10-11 17:54:20,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:20,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580577944] [2024-10-11 17:54:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:20,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:20,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:20,235 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:20,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:20,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:20,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:20,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:20,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580577944] [2024-10-11 17:54:20,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580577944] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:20,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8839451] [2024-10-11 17:54:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:20,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:20,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:20,256 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:20,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 17:54:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:20,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 17:54:20,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:20,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:20,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8839451] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:20,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:20,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-10-11 17:54:20,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792708764] [2024-10-11 17:54:20,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:20,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 17:54:20,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:20,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 17:54:20,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2024-10-11 17:54:20,759 INFO L87 Difference]: Start difference. First operand 219 states and 260 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-10-11 17:54:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:21,003 INFO L93 Difference]: Finished difference Result 253 states and 297 transitions. [2024-10-11 17:54:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 17:54:21,006 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 50 [2024-10-11 17:54:21,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:21,007 INFO L225 Difference]: With dead ends: 253 [2024-10-11 17:54:21,007 INFO L226 Difference]: Without dead ends: 253 [2024-10-11 17:54:21,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2024-10-11 17:54:21,009 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 77 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:21,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 647 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:54:21,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-10-11 17:54:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 230. [2024-10-11 17:54:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 165 states have (on average 1.2303030303030302) internal successors, (203), 180 states have internal predecessors, (203), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2024-10-11 17:54:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 271 transitions. [2024-10-11 17:54:21,015 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 271 transitions. Word has length 50 [2024-10-11 17:54:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:21,015 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 271 transitions. [2024-10-11 17:54:21,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-10-11 17:54:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 271 transitions. [2024-10-11 17:54:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-11 17:54:21,016 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:21,016 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2024-10-11 17:54:21,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-11 17:54:21,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:21,217 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:21,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:21,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1867937572, now seen corresponding path program 1 times [2024-10-11 17:54:21,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:21,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376553656] [2024-10-11 17:54:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:21,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:21,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:21,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 17:54:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:21,655 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 17:54:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:21,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 17:54:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:21,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-11 17:54:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:21,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:21,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376553656] [2024-10-11 17:54:21,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376553656] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:21,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96891177] [2024-10-11 17:54:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:21,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:21,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:21,773 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:21,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 17:54:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:21,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-11 17:54:21,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:22,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:23,820 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 256 treesize of output 246 [2024-10-11 17:54:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:24,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96891177] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:24,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:24,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 16] total 55 [2024-10-11 17:54:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92377028] [2024-10-11 17:54:24,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:24,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-11 17:54:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-11 17:54:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2800, Unknown=0, NotChecked=0, Total=3080 [2024-10-11 17:54:24,881 INFO L87 Difference]: Start difference. First operand 230 states and 271 transitions. Second operand has 56 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 48 states have internal predecessors, (93), 15 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-10-11 17:54:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:30,651 INFO L93 Difference]: Finished difference Result 322 states and 374 transitions. [2024-10-11 17:54:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-10-11 17:54:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 48 states have internal predecessors, (93), 15 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 52 [2024-10-11 17:54:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:30,653 INFO L225 Difference]: With dead ends: 322 [2024-10-11 17:54:30,653 INFO L226 Difference]: Without dead ends: 314 [2024-10-11 17:54:30,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3750 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1227, Invalid=12579, Unknown=0, NotChecked=0, Total=13806 [2024-10-11 17:54:30,658 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 262 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 3081 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 2026 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 3081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:30,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 2026 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 3081 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-10-11 17:54:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2024-10-11 17:54:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 239. [2024-10-11 17:54:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 171 states have (on average 1.2105263157894737) internal successors, (207), 186 states have internal predecessors, (207), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 17:54:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 279 transitions. [2024-10-11 17:54:30,664 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 279 transitions. Word has length 52 [2024-10-11 17:54:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:30,664 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 279 transitions. [2024-10-11 17:54:30,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 48 states have internal predecessors, (93), 15 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-10-11 17:54:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 279 transitions. [2024-10-11 17:54:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-11 17:54:30,665 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:30,665 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:30,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-11 17:54:30,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-11 17:54:30,868 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:30,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:30,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1007382601, now seen corresponding path program 1 times [2024-10-11 17:54:30,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:30,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575394328] [2024-10-11 17:54:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:30,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:30,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:30,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:30,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:30,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:30,918 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:30,934 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 17:54:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 17:54:30,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:30,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575394328] [2024-10-11 17:54:30,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575394328] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:54:30,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:54:30,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:54:30,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807949062] [2024-10-11 17:54:30,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:54:30,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:54:30,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:54:30,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:54:30,943 INFO L87 Difference]: Start difference. First operand 239 states and 279 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 17:54:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:31,018 INFO L93 Difference]: Finished difference Result 257 states and 300 transitions. [2024-10-11 17:54:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:54:31,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2024-10-11 17:54:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:31,019 INFO L225 Difference]: With dead ends: 257 [2024-10-11 17:54:31,020 INFO L226 Difference]: Without dead ends: 257 [2024-10-11 17:54:31,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:54:31,020 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:31,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 174 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:54:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-10-11 17:54:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 238. [2024-10-11 17:54:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 171 states have (on average 1.2046783625730995) internal successors, (206), 185 states have internal predecessors, (206), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 17:54:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 278 transitions. [2024-10-11 17:54:31,027 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 278 transitions. Word has length 52 [2024-10-11 17:54:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:31,027 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 278 transitions. [2024-10-11 17:54:31,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 17:54:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 278 transitions. [2024-10-11 17:54:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-11 17:54:31,027 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:31,028 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:31,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-11 17:54:31,028 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:31,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:31,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1007382600, now seen corresponding path program 1 times [2024-10-11 17:54:31,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:31,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892174184] [2024-10-11 17:54:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:31,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 17:54:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 17:54:31,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:31,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892174184] [2024-10-11 17:54:31,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892174184] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:54:31,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:54:31,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-11 17:54:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736499918] [2024-10-11 17:54:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:54:31,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 17:54:31,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 17:54:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-11 17:54:31,172 INFO L87 Difference]: Start difference. First operand 238 states and 278 transitions. Second operand has 10 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-11 17:54:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:31,339 INFO L93 Difference]: Finished difference Result 265 states and 310 transitions. [2024-10-11 17:54:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 17:54:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2024-10-11 17:54:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:31,340 INFO L225 Difference]: With dead ends: 265 [2024-10-11 17:54:31,340 INFO L226 Difference]: Without dead ends: 265 [2024-10-11 17:54:31,341 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-11 17:54:31,341 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 61 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:31,341 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 319 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:54:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-10-11 17:54:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 240. [2024-10-11 17:54:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 173 states have (on average 1.2080924855491328) internal successors, (209), 187 states have internal predecessors, (209), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 17:54:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 281 transitions. [2024-10-11 17:54:31,352 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 281 transitions. Word has length 52 [2024-10-11 17:54:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:31,352 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 281 transitions. [2024-10-11 17:54:31,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-11 17:54:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 281 transitions. [2024-10-11 17:54:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-11 17:54:31,353 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:31,353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:31,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-10-11 17:54:31,353 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:31,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1727070895, now seen corresponding path program 1 times [2024-10-11 17:54:31,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:31,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206028005] [2024-10-11 17:54:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,417 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 17:54:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:54:31,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:31,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206028005] [2024-10-11 17:54:31,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206028005] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:31,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473141237] [2024-10-11 17:54:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:31,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:31,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:31,429 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:31,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 17:54:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:31,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 17:54:31,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:31,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:31,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473141237] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:31,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:31,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-10-11 17:54:31,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413940612] [2024-10-11 17:54:31,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:31,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 17:54:31,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:31,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 17:54:31,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-11 17:54:31,621 INFO L87 Difference]: Start difference. First operand 240 states and 281 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 17:54:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:31,759 INFO L93 Difference]: Finished difference Result 266 states and 310 transitions. [2024-10-11 17:54:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 17:54:31,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2024-10-11 17:54:31,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:31,764 INFO L225 Difference]: With dead ends: 266 [2024-10-11 17:54:31,764 INFO L226 Difference]: Without dead ends: 266 [2024-10-11 17:54:31,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-10-11 17:54:31,764 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 39 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:31,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 469 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:54:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-10-11 17:54:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 244. [2024-10-11 17:54:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 177 states have (on average 1.2146892655367232) internal successors, (215), 191 states have internal predecessors, (215), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 17:54:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 287 transitions. [2024-10-11 17:54:31,769 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 287 transitions. Word has length 54 [2024-10-11 17:54:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:31,770 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 287 transitions. [2024-10-11 17:54:31,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 17:54:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 287 transitions. [2024-10-11 17:54:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-11 17:54:31,770 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:31,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:31,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-11 17:54:31,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:31,971 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:31,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1726964864, now seen corresponding path program 1 times [2024-10-11 17:54:31,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:31,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241947627] [2024-10-11 17:54:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:31,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:33,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:33,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:33,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:33,039 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:33,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:33,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 17:54:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:54:33,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:33,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241947627] [2024-10-11 17:54:33,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241947627] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:33,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297809088] [2024-10-11 17:54:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:33,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:33,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:33,879 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:33,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 17:54:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:33,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-11 17:54:33,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:34,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-11 17:54:34,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-10-11 17:54:34,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2024-10-11 17:54:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 17:54:34,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:34,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-10-11 17:54:34,664 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 27 treesize of output 25 [2024-10-11 17:54:34,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-10-11 17:54:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:35,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297809088] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:35,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:54:35,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [22, 18] total 49 [2024-10-11 17:54:35,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316155932] [2024-10-11 17:54:35,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:54:35,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 17:54:35,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:35,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 17:54:35,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2024-10-11 17:54:35,440 INFO L87 Difference]: Start difference. First operand 244 states and 287 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 17:54:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:36,082 INFO L93 Difference]: Finished difference Result 297 states and 358 transitions. [2024-10-11 17:54:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 17:54:36,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2024-10-11 17:54:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:36,083 INFO L225 Difference]: With dead ends: 297 [2024-10-11 17:54:36,083 INFO L226 Difference]: Without dead ends: 297 [2024-10-11 17:54:36,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2024-10-11 17:54:36,084 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 49 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:36,084 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 460 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:54:36,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-10-11 17:54:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 248. [2024-10-11 17:54:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 194 states have internal predecessors, (219), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 17:54:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 291 transitions. [2024-10-11 17:54:36,089 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 291 transitions. Word has length 54 [2024-10-11 17:54:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:36,089 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 291 transitions. [2024-10-11 17:54:36,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-11 17:54:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 291 transitions. [2024-10-11 17:54:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-11 17:54:36,089 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:36,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:36,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-11 17:54:36,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-11 17:54:36,290 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:36,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:36,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1996297117, now seen corresponding path program 1 times [2024-10-11 17:54:36,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:36,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093574101] [2024-10-11 17:54:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:36,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,342 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 17:54:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 17:54:36,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:36,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093574101] [2024-10-11 17:54:36,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093574101] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:54:36,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:54:36,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:54:36,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92055016] [2024-10-11 17:54:36,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:54:36,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:54:36,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:36,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:54:36,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:54:36,352 INFO L87 Difference]: Start difference. First operand 248 states and 291 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 17:54:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:36,541 INFO L93 Difference]: Finished difference Result 266 states and 311 transitions. [2024-10-11 17:54:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:54:36,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2024-10-11 17:54:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:36,542 INFO L225 Difference]: With dead ends: 266 [2024-10-11 17:54:36,543 INFO L226 Difference]: Without dead ends: 266 [2024-10-11 17:54:36,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:54:36,546 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:36,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 177 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:54:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-10-11 17:54:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 247. [2024-10-11 17:54:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 181 states have (on average 1.1988950276243093) internal successors, (217), 193 states have internal predecessors, (217), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 17:54:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 289 transitions. [2024-10-11 17:54:36,551 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 289 transitions. Word has length 55 [2024-10-11 17:54:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:36,551 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 289 transitions. [2024-10-11 17:54:36,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 17:54:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 289 transitions. [2024-10-11 17:54:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-11 17:54:36,552 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:36,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:36,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-10-11 17:54:36,552 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:36,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1996297116, now seen corresponding path program 1 times [2024-10-11 17:54:36,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:36,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711204598] [2024-10-11 17:54:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:36,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,807 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 17:54:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:36,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711204598] [2024-10-11 17:54:36,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711204598] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840397890] [2024-10-11 17:54:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:36,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:36,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:36,822 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:36,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 17:54:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:36,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 17:54:36,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:37,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:37,398 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 22 treesize of output 18 [2024-10-11 17:54:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:37,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840397890] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:37,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:37,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2024-10-11 17:54:37,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730949874] [2024-10-11 17:54:37,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:37,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 17:54:37,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 17:54:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:54:37,468 INFO L87 Difference]: Start difference. First operand 247 states and 289 transitions. Second operand has 17 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-11 17:54:41,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 17:54:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:41,784 INFO L93 Difference]: Finished difference Result 274 states and 318 transitions. [2024-10-11 17:54:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 17:54:41,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 55 [2024-10-11 17:54:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:41,785 INFO L225 Difference]: With dead ends: 274 [2024-10-11 17:54:41,785 INFO L226 Difference]: Without dead ends: 274 [2024-10-11 17:54:41,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-10-11 17:54:41,786 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 116 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:41,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 337 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 474 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-10-11 17:54:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-10-11 17:54:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 251. [2024-10-11 17:54:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 185 states have (on average 1.2) internal successors, (222), 197 states have internal predecessors, (222), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 17:54:41,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 294 transitions. [2024-10-11 17:54:41,790 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 294 transitions. Word has length 55 [2024-10-11 17:54:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:41,790 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 294 transitions. [2024-10-11 17:54:41,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-11 17:54:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 294 transitions. [2024-10-11 17:54:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-11 17:54:41,791 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:41,791 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:41,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-11 17:54:41,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:41,995 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:41,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1039276801, now seen corresponding path program 5 times [2024-10-11 17:54:41,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:41,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349744142] [2024-10-11 17:54:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:41,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:42,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:42,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 17:54:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:42,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 17:54:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:42,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 17:54:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 17:54:42,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:42,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349744142] [2024-10-11 17:54:42,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349744142] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:42,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655215759] [2024-10-11 17:54:42,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:54:42,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:42,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:42,170 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:42,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 17:54:42,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-11 17:54:42,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:54:42,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 17:54:42,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 17:54:42,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 70 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:43,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655215759] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:43,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:43,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 40 [2024-10-11 17:54:43,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826619401] [2024-10-11 17:54:43,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:43,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-11 17:54:43,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-11 17:54:43,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 17:54:43,438 INFO L87 Difference]: Start difference. First operand 251 states and 294 transitions. Second operand has 40 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 6 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-11 17:54:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:44,686 INFO L93 Difference]: Finished difference Result 294 states and 344 transitions. [2024-10-11 17:54:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-11 17:54:44,687 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 6 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2024-10-11 17:54:44,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:44,688 INFO L225 Difference]: With dead ends: 294 [2024-10-11 17:54:44,688 INFO L226 Difference]: Without dead ends: 294 [2024-10-11 17:54:44,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=601, Invalid=3689, Unknown=0, NotChecked=0, Total=4290 [2024-10-11 17:54:44,689 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 116 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:44,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 953 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 17:54:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-10-11 17:54:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 272. [2024-10-11 17:54:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 218 states have internal predecessors, (246), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 17:54:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 318 transitions. [2024-10-11 17:54:44,693 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 318 transitions. Word has length 57 [2024-10-11 17:54:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:44,693 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 318 transitions. [2024-10-11 17:54:44,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 6 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-11 17:54:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 318 transitions. [2024-10-11 17:54:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-11 17:54:44,694 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:44,694 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:44,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-11 17:54:44,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:44,895 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:44,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:44,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1408911296, now seen corresponding path program 1 times [2024-10-11 17:54:44,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:44,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011392546] [2024-10-11 17:54:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:44,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:45,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 17:54:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:45,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 17:54:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:45,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 17:54:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:45,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 17:54:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:45,074 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 17:54:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:45,149 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 17:54:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:45,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:54:45,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011392546] [2024-10-11 17:54:45,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011392546] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:54:45,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867861718] [2024-10-11 17:54:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:45,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:54:45,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:54:45,156 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:54:45,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 17:54:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:54:45,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 17:54:45,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:54:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:45,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:54:45,659 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 23 treesize of output 19 [2024-10-11 17:54:45,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 17:54:45,721 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 18 treesize of output 22 [2024-10-11 17:54:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:54:45,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867861718] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:54:45,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:54:45,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 35 [2024-10-11 17:54:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540584165] [2024-10-11 17:54:45,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:54:45,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-11 17:54:45,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:54:45,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-11 17:54:45,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2024-10-11 17:54:45,877 INFO L87 Difference]: Start difference. First operand 272 states and 318 transitions. Second operand has 36 states, 34 states have (on average 2.911764705882353) internal successors, (99), 35 states have internal predecessors, (99), 13 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (14), 10 states have call predecessors, (14), 13 states have call successors, (14) [2024-10-11 17:54:50,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 17:54:50,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:54:50,958 INFO L93 Difference]: Finished difference Result 295 states and 341 transitions. [2024-10-11 17:54:50,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-11 17:54:50,959 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.911764705882353) internal successors, (99), 35 states have internal predecessors, (99), 13 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (14), 10 states have call predecessors, (14), 13 states have call successors, (14) Word has length 57 [2024-10-11 17:54:50,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:54:50,960 INFO L225 Difference]: With dead ends: 295 [2024-10-11 17:54:50,960 INFO L226 Difference]: Without dead ends: 295 [2024-10-11 17:54:50,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=2738, Unknown=0, NotChecked=0, Total=3080 [2024-10-11 17:54:50,961 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 136 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:54:50,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 826 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1279 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2024-10-11 17:54:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-10-11 17:54:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 272. [2024-10-11 17:54:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 206 states have (on average 1.1893203883495145) internal successors, (245), 218 states have internal predecessors, (245), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-11 17:54:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 317 transitions. [2024-10-11 17:54:50,965 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 317 transitions. Word has length 57 [2024-10-11 17:54:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:54:50,966 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 317 transitions. [2024-10-11 17:54:50,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.911764705882353) internal successors, (99), 35 states have internal predecessors, (99), 13 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (14), 10 states have call predecessors, (14), 13 states have call successors, (14) [2024-10-11 17:54:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 317 transitions. [2024-10-11 17:54:50,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-11 17:54:50,966 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:54:50,967 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:54:50,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-11 17:54:51,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-11 17:54:51,171 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-10-11 17:54:51,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:54:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1049129352, now seen corresponding path program 1 times [2024-10-11 17:54:51,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:54:51,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077607602] [2024-10-11 17:54:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:54:51,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:54:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat