./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 15:00:20,472 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 15:00:20,546 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 15:00:20,551 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 15:00:20,552 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 15:00:20,590 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 15:00:20,590 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 15:00:20,591 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 15:00:20,592 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 15:00:20,592 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 15:00:20,592 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 15:00:20,593 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 15:00:20,593 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 15:00:20,594 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 15:00:20,594 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 15:00:20,595 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 15:00:20,595 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 15:00:20,595 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 15:00:20,596 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 15:00:20,596 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 15:00:20,596 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 15:00:20,597 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 15:00:20,597 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 15:00:20,601 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 15:00:20,602 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 15:00:20,602 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 15:00:20,602 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 15:00:20,603 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 15:00:20,603 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 15:00:20,603 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 15:00:20,603 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 15:00:20,604 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 15:00:20,604 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 15:00:20,604 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 15:00:20,604 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 15:00:20,605 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 15:00:20,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 15:00:20,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 15:00:20,606 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 15:00:20,606 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 15:00:20,606 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 15:00:20,606 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 15:00:20,607 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 [2024-11-20 15:00:20,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 15:00:20,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 15:00:20,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 15:00:20,903 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 15:00:20,903 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 15:00:20,905 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2024-11-20 15:00:22,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 15:00:22,633 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 15:00:22,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2024-11-20 15:00:22,646 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3567cff0/34a6b35a67354f0ba089dd13c1bbf40d/FLAG725ad71d2 [2024-11-20 15:00:22,968 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3567cff0/34a6b35a67354f0ba089dd13c1bbf40d [2024-11-20 15:00:22,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 15:00:22,975 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 15:00:22,976 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 15:00:22,976 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 15:00:22,981 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 15:00:22,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:00:22" (1/1) ... [2024-11-20 15:00:22,982 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1731a317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:22, skipping insertion in model container [2024-11-20 15:00:22,982 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:00:22" (1/1) ... [2024-11-20 15:00:23,019 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 15:00:23,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 15:00:23,415 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 15:00:23,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 15:00:23,502 INFO L204 MainTranslator]: Completed translation [2024-11-20 15:00:23,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23 WrapperNode [2024-11-20 15:00:23,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 15:00:23,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 15:00:23,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 15:00:23,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 15:00:23,512 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,527 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,549 INFO L138 Inliner]: procedures = 125, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 94 [2024-11-20 15:00:23,550 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 15:00:23,550 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 15:00:23,551 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 15:00:23,551 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 15:00:23,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,564 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,585 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-20 15:00:23,586 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,591 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,595 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,597 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,602 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 15:00:23,603 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 15:00:23,603 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 15:00:23,603 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 15:00:23,604 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (1/1) ... [2024-11-20 15:00:23,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 15:00:23,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:23,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 15:00:23,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 15:00:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 15:00:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 15:00:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-20 15:00:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-20 15:00:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-20 15:00:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-20 15:00:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-20 15:00:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 15:00:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 15:00:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 15:00:23,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 15:00:23,789 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 15:00:23,791 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 15:00:23,967 INFO L? ?]: Removed 46 outVars from TransFormulas that were not future-live. [2024-11-20 15:00:23,967 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 15:00:23,979 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 15:00:23,980 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 15:00:23,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:00:23 BoogieIcfgContainer [2024-11-20 15:00:23,999 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 15:00:24,001 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 15:00:24,001 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 15:00:24,012 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 15:00:24,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 03:00:22" (1/3) ... [2024-11-20 15:00:24,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26438d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:00:24, skipping insertion in model container [2024-11-20 15:00:24,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:00:23" (2/3) ... [2024-11-20 15:00:24,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26438d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:00:24, skipping insertion in model container [2024-11-20 15:00:24,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:00:23" (3/3) ... [2024-11-20 15:00:24,022 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2024-11-20 15:00:24,072 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 15:00:24,073 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-11-20 15:00:24,121 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 15:00:24,127 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;@6e5393a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 15:00:24,127 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-20 15:00:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 32 states have (on average 1.71875) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-20 15:00:24,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:24,136 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:24,137 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:24,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1819225437, now seen corresponding path program 1 times [2024-11-20 15:00:24,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:24,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027645219] [2024-11-20 15:00:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:24,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:24,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027645219] [2024-11-20 15:00:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027645219] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:24,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:24,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 15:00:24,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127689308] [2024-11-20 15:00:24,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:24,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 15:00:24,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:24,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 15:00:24,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 15:00:24,370 INFO L87 Difference]: Start difference. First operand has 44 states, 32 states have (on average 1.71875) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:24,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:24,386 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-11-20 15:00:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 15:00:24,389 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-20 15:00:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:24,395 INFO L225 Difference]: With dead ends: 43 [2024-11-20 15:00:24,396 INFO L226 Difference]: Without dead ends: 40 [2024-11-20 15:00:24,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 15:00:24,402 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:24,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-20 15:00:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-20 15:00:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-11-20 15:00:24,441 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 7 [2024-11-20 15:00:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:24,441 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-11-20 15:00:24,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-11-20 15:00:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-20 15:00:24,443 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:24,443 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:24,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 15:00:24,444 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:24,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1213452566, now seen corresponding path program 1 times [2024-11-20 15:00:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:24,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820284055] [2024-11-20 15:00:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:24,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:24,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:24,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820284055] [2024-11-20 15:00:24,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820284055] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:24,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:24,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 15:00:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520506130] [2024-11-20 15:00:24,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:24,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 15:00:24,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:24,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 15:00:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 15:00:24,555 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:24,599 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2024-11-20 15:00:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 15:00:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-20 15:00:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:24,601 INFO L225 Difference]: With dead ends: 39 [2024-11-20 15:00:24,601 INFO L226 Difference]: Without dead ends: 39 [2024-11-20 15:00:24,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 15:00:24,602 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:24,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:24,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-20 15:00:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-20 15:00:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-20 15:00:24,614 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 9 [2024-11-20 15:00:24,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:24,615 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-20 15:00:24,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:24,615 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-20 15:00:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-20 15:00:24,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:24,616 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:24,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 15:00:24,616 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:24,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:24,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1213452567, now seen corresponding path program 1 times [2024-11-20 15:00:24,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:24,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874808713] [2024-11-20 15:00:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:24,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:24,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874808713] [2024-11-20 15:00:24,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874808713] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:24,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:24,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 15:00:24,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14247786] [2024-11-20 15:00:24,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:24,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 15:00:24,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:24,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 15:00:24,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 15:00:24,797 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:24,834 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-11-20 15:00:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 15:00:24,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-20 15:00:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:24,835 INFO L225 Difference]: With dead ends: 38 [2024-11-20 15:00:24,836 INFO L226 Difference]: Without dead ends: 38 [2024-11-20 15:00:24,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 15:00:24,837 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:24,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-20 15:00:24,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-20 15:00:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:24,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-11-20 15:00:24,843 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 9 [2024-11-20 15:00:24,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:24,843 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-11-20 15:00:24,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:24,844 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-11-20 15:00:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-20 15:00:24,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:24,845 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:24,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 15:00:24,845 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:24,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2104757995, now seen corresponding path program 1 times [2024-11-20 15:00:24,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:24,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676975174] [2024-11-20 15:00:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:24,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:24,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676975174] [2024-11-20 15:00:24,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676975174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:24,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:24,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 15:00:24,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477873743] [2024-11-20 15:00:24,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:24,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 15:00:24,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:24,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 15:00:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 15:00:24,949 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:25,019 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2024-11-20 15:00:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 15:00:25,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-20 15:00:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:25,021 INFO L225 Difference]: With dead ends: 60 [2024-11-20 15:00:25,021 INFO L226 Difference]: Without dead ends: 60 [2024-11-20 15:00:25,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 15:00:25,023 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 24 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:25,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:25,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-20 15:00:25,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2024-11-20 15:00:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-11-20 15:00:25,031 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 11 [2024-11-20 15:00:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:25,032 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-11-20 15:00:25,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:25,032 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-11-20 15:00:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-20 15:00:25,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:25,033 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:25,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 15:00:25,033 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:25,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:25,035 INFO L85 PathProgramCache]: Analyzing trace with hash -48409076, now seen corresponding path program 1 times [2024-11-20 15:00:25,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:25,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844418293] [2024-11-20 15:00:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:25,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:25,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:25,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844418293] [2024-11-20 15:00:25,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844418293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:25,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:25,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 15:00:25,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258036567] [2024-11-20 15:00:25,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:25,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 15:00:25,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:25,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 15:00:25,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 15:00:25,186 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:25,231 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2024-11-20 15:00:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 15:00:25,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-20 15:00:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:25,233 INFO L225 Difference]: With dead ends: 49 [2024-11-20 15:00:25,233 INFO L226 Difference]: Without dead ends: 49 [2024-11-20 15:00:25,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 15:00:25,234 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:25,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 143 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-20 15:00:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-11-20 15:00:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2024-11-20 15:00:25,246 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 14 [2024-11-20 15:00:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:25,246 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2024-11-20 15:00:25,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:25,247 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2024-11-20 15:00:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-20 15:00:25,248 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:25,248 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:25,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 15:00:25,248 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:25,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash 347063660, now seen corresponding path program 1 times [2024-11-20 15:00:25,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:25,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043834482] [2024-11-20 15:00:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:25,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:25,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:25,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043834482] [2024-11-20 15:00:25,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043834482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:25,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90529514] [2024-11-20 15:00:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:25,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:25,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:25,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:25,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 15:00:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:25,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 15:00:25,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:25,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:25,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90529514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:25,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:25,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-20 15:00:25,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939822369] [2024-11-20 15:00:25,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:25,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 15:00:25,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 15:00:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-20 15:00:25,606 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:25,685 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-11-20 15:00:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 15:00:25,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-20 15:00:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:25,687 INFO L225 Difference]: With dead ends: 66 [2024-11-20 15:00:25,687 INFO L226 Difference]: Without dead ends: 66 [2024-11-20 15:00:25,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-20 15:00:25,688 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:25,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 153 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-20 15:00:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2024-11-20 15:00:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-11-20 15:00:25,698 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 15 [2024-11-20 15:00:25,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:25,698 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-11-20 15:00:25,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-11-20 15:00:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-20 15:00:25,699 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:25,699 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:25,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 15:00:25,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-20 15:00:25,900 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:25,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1919707581, now seen corresponding path program 2 times [2024-11-20 15:00:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:25,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071067365] [2024-11-20 15:00:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:25,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:26,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:26,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071067365] [2024-11-20 15:00:26,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071067365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:26,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:26,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 15:00:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995226431] [2024-11-20 15:00:26,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:26,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 15:00:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:26,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 15:00:26,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-20 15:00:26,055 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:26,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:26,140 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-11-20 15:00:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 15:00:26,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-20 15:00:26,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:26,141 INFO L225 Difference]: With dead ends: 45 [2024-11-20 15:00:26,142 INFO L226 Difference]: Without dead ends: 45 [2024-11-20 15:00:26,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-20 15:00:26,144 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:26,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 15:00:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-20 15:00:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-20 15:00:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-11-20 15:00:26,153 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 19 [2024-11-20 15:00:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:26,154 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-11-20 15:00:26,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-11-20 15:00:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-20 15:00:26,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:26,155 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:26,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 15:00:26,156 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:26,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1919707580, now seen corresponding path program 1 times [2024-11-20 15:00:26,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:26,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211967508] [2024-11-20 15:00:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:26,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 15:00:26,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:26,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211967508] [2024-11-20 15:00:26,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211967508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:26,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:26,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 15:00:26,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561976008] [2024-11-20 15:00:26,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:26,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 15:00:26,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:26,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 15:00:26,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-20 15:00:26,342 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:26,425 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-11-20 15:00:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 15:00:26,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-20 15:00:26,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:26,426 INFO L225 Difference]: With dead ends: 45 [2024-11-20 15:00:26,426 INFO L226 Difference]: Without dead ends: 45 [2024-11-20 15:00:26,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-20 15:00:26,427 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:26,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 143 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 15:00:26,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-20 15:00:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-20 15:00:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-11-20 15:00:26,439 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 19 [2024-11-20 15:00:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:26,439 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-11-20 15:00:26,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-11-20 15:00:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-20 15:00:26,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:26,440 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:26,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 15:00:26,440 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:26,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1775998621, now seen corresponding path program 1 times [2024-11-20 15:00:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:26,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772511616] [2024-11-20 15:00:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:26,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:26,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:26,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772511616] [2024-11-20 15:00:26,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772511616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:26,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476195384] [2024-11-20 15:00:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:26,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:26,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:26,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:26,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 15:00:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:26,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-20 15:00:26,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:26,915 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 [2024-11-20 15:00:26,971 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 15:00:26,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-20 15:00:26,981 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 [2024-11-20 15:00:27,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:00:27,223 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:27,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-20 15:00:27,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-20 15:00:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:27,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:27,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2024-11-20 15:00:27,602 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 20 [2024-11-20 15:00:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:27,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476195384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:27,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:27,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-11-20 15:00:27,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979665276] [2024-11-20 15:00:27,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:27,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 15:00:27,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:27,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 15:00:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2024-11-20 15:00:27,796 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:28,238 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2024-11-20 15:00:28,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 15:00:28,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-20 15:00:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:28,239 INFO L225 Difference]: With dead ends: 50 [2024-11-20 15:00:28,239 INFO L226 Difference]: Without dead ends: 50 [2024-11-20 15:00:28,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-11-20 15:00:28,240 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:28,240 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 353 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 15:00:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-20 15:00:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-11-20 15:00:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:28,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-11-20 15:00:28,244 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 22 [2024-11-20 15:00:28,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:28,244 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-11-20 15:00:28,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-11-20 15:00:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-20 15:00:28,245 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:28,245 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:28,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 15:00:28,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-20 15:00:28,446 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:28,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:28,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1775998622, now seen corresponding path program 1 times [2024-11-20 15:00:28,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:28,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306653910] [2024-11-20 15:00:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:28,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:28,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:28,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306653910] [2024-11-20 15:00:28,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306653910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:28,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819743469] [2024-11-20 15:00:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:28,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:28,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:28,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:28,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 15:00:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:29,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-20 15:00:29,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:29,028 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 [2024-11-20 15:00:29,033 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 [2024-11-20 15:00:29,100 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 15:00:29,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-20 15:00:29,124 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 15:00:29,124 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 [2024-11-20 15:00:29,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:00:29,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 15:00:29,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-20 15:00:29,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-20 15:00:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:29,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:29,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819743469] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:29,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:29,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-20 15:00:29,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476815006] [2024-11-20 15:00:29,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:29,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-20 15:00:29,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:29,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-20 15:00:29,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2024-11-20 15:00:29,850 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:30,233 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2024-11-20 15:00:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 15:00:30,234 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-20 15:00:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:30,234 INFO L225 Difference]: With dead ends: 50 [2024-11-20 15:00:30,234 INFO L226 Difference]: Without dead ends: 50 [2024-11-20 15:00:30,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2024-11-20 15:00:30,235 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:30,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 388 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 15:00:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-20 15:00:30,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-11-20 15:00:30,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2024-11-20 15:00:30,243 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2024-11-20 15:00:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:30,243 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2024-11-20 15:00:30,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:30,243 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2024-11-20 15:00:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-20 15:00:30,244 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:30,244 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:30,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 15:00:30,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:30,445 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:30,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:30,445 INFO L85 PathProgramCache]: Analyzing trace with hash -829217326, now seen corresponding path program 1 times [2024-11-20 15:00:30,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:30,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867167406] [2024-11-20 15:00:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:30,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 15:00:30,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:30,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867167406] [2024-11-20 15:00:30,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867167406] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:30,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:30,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 15:00:30,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124492805] [2024-11-20 15:00:30,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:30,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 15:00:30,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:30,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 15:00:30,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-20 15:00:30,529 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:30,571 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2024-11-20 15:00:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 15:00:30,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-20 15:00:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:30,572 INFO L225 Difference]: With dead ends: 48 [2024-11-20 15:00:30,572 INFO L226 Difference]: Without dead ends: 48 [2024-11-20 15:00:30,573 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-20 15:00:30,573 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:30,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 168 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-20 15:00:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-20 15:00:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-11-20 15:00:30,576 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 23 [2024-11-20 15:00:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:30,577 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-11-20 15:00:30,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-11-20 15:00:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-20 15:00:30,578 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:30,578 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:30,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 15:00:30,578 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:30,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash -927170557, now seen corresponding path program 2 times [2024-11-20 15:00:30,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:30,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880829422] [2024-11-20 15:00:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:30,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:31,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:31,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880829422] [2024-11-20 15:00:31,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880829422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:31,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756145556] [2024-11-20 15:00:31,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 15:00:31,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:31,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:31,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:31,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 15:00:31,146 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 15:00:31,147 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:00:31,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-20 15:00:31,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:31,161 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 [2024-11-20 15:00:31,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 15:00:31,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 15:00:31,282 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 15:00:31,282 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 [2024-11-20 15:00:31,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-20 15:00:31,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-20 15:00:31,768 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:31,776 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-20 15:00:31,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 31 [2024-11-20 15:00:31,795 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 15:00:31,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2024-11-20 15:00:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:31,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:32,824 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 126 treesize of output 118 [2024-11-20 15:00:32,962 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 126 treesize of output 118 [2024-11-20 15:00:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:33,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756145556] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:33,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:33,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2024-11-20 15:00:33,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598207299] [2024-11-20 15:00:33,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:33,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-20 15:00:33,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-20 15:00:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1044, Unknown=0, NotChecked=0, Total=1122 [2024-11-20 15:00:33,238 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:34,113 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-11-20 15:00:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 15:00:34,114 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-20 15:00:34,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:34,116 INFO L225 Difference]: With dead ends: 63 [2024-11-20 15:00:34,116 INFO L226 Difference]: Without dead ends: 63 [2024-11-20 15:00:34,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=122, Invalid=1600, Unknown=0, NotChecked=0, Total=1722 [2024-11-20 15:00:34,117 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:34,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 863 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-20 15:00:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-20 15:00:34,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2024-11-20 15:00:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2024-11-20 15:00:34,127 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 25 [2024-11-20 15:00:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:34,127 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2024-11-20 15:00:34,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2024-11-20 15:00:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-20 15:00:34,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:34,128 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] [2024-11-20 15:00:34,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 15:00:34,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:34,329 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:34,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1271884076, now seen corresponding path program 1 times [2024-11-20 15:00:34,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:34,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712827796] [2024-11-20 15:00:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:34,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 15:00:34,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:34,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712827796] [2024-11-20 15:00:34,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712827796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:34,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:34,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 15:00:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709628687] [2024-11-20 15:00:34,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:34,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 15:00:34,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:34,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 15:00:34,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 15:00:34,410 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:34,487 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2024-11-20 15:00:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 15:00:34,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-20 15:00:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:34,488 INFO L225 Difference]: With dead ends: 62 [2024-11-20 15:00:34,488 INFO L226 Difference]: Without dead ends: 62 [2024-11-20 15:00:34,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-20 15:00:34,489 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:34,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 113 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 15:00:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-20 15:00:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-20 15:00:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2024-11-20 15:00:34,492 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 26 [2024-11-20 15:00:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:34,493 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2024-11-20 15:00:34,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2024-11-20 15:00:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-20 15:00:34,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:34,494 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] [2024-11-20 15:00:34,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 15:00:34,494 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:34,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:34,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1271884077, now seen corresponding path program 1 times [2024-11-20 15:00:34,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:34,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451827857] [2024-11-20 15:00:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:34,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 15:00:34,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:34,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451827857] [2024-11-20 15:00:34,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451827857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:34,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072237778] [2024-11-20 15:00:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:34,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:34,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:34,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:34,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 15:00:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:34,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 15:00:34,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 15:00:34,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 15:00:34,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072237778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:34,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:34,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-20 15:00:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256514764] [2024-11-20 15:00:34,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:34,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 15:00:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 15:00:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-11-20 15:00:34,799 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:34,844 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2024-11-20 15:00:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 15:00:34,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-20 15:00:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:34,845 INFO L225 Difference]: With dead ends: 109 [2024-11-20 15:00:34,845 INFO L226 Difference]: Without dead ends: 109 [2024-11-20 15:00:34,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-11-20 15:00:34,846 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:34,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 206 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:34,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-20 15:00:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 65. [2024-11-20 15:00:34,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:34,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2024-11-20 15:00:34,849 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 26 [2024-11-20 15:00:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:34,850 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2024-11-20 15:00:34,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:34,850 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2024-11-20 15:00:34,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-20 15:00:34,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:34,851 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:34,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 15:00:35,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-20 15:00:35,052 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:35,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash 773657178, now seen corresponding path program 1 times [2024-11-20 15:00:35,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:35,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146109087] [2024-11-20 15:00:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:35,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:35,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146109087] [2024-11-20 15:00:35,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146109087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:35,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861495966] [2024-11-20 15:00:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:35,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:35,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:35,213 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:35,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 15:00:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:35,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-20 15:00:35,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:35,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:00:35,462 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:35,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:00:35,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 15:00:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:35,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:35,646 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 11 treesize of output 9 [2024-11-20 15:00:35,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-20 15:00:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:35,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861495966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:35,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:35,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2024-11-20 15:00:35,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981773351] [2024-11-20 15:00:35,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:35,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 15:00:35,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:35,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 15:00:35,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2024-11-20 15:00:35,704 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:35,953 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-11-20 15:00:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 15:00:35,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-20 15:00:35,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:35,954 INFO L225 Difference]: With dead ends: 62 [2024-11-20 15:00:35,954 INFO L226 Difference]: Without dead ends: 62 [2024-11-20 15:00:35,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2024-11-20 15:00:35,955 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:35,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 472 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 15:00:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-20 15:00:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-20 15:00:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-11-20 15:00:35,960 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 27 [2024-11-20 15:00:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:35,960 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-11-20 15:00:35,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-11-20 15:00:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-20 15:00:35,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:35,961 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] [2024-11-20 15:00:35,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 15:00:36,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 15:00:36,162 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:36,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash 330379155, now seen corresponding path program 2 times [2024-11-20 15:00:36,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:36,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711676759] [2024-11-20 15:00:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:36,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 15:00:36,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:36,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711676759] [2024-11-20 15:00:36,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711676759] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:36,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:36,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 15:00:36,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659721129] [2024-11-20 15:00:36,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:36,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 15:00:36,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 15:00:36,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 15:00:36,322 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:36,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:36,405 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2024-11-20 15:00:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 15:00:36,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-20 15:00:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:36,406 INFO L225 Difference]: With dead ends: 64 [2024-11-20 15:00:36,406 INFO L226 Difference]: Without dead ends: 64 [2024-11-20 15:00:36,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-20 15:00:36,407 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:36,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 138 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 15:00:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-20 15:00:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-20 15:00:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.25) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2024-11-20 15:00:36,410 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 29 [2024-11-20 15:00:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:36,411 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2024-11-20 15:00:36,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2024-11-20 15:00:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-20 15:00:36,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:36,412 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:36,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 15:00:36,412 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:36,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:36,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1624346598, now seen corresponding path program 3 times [2024-11-20 15:00:36,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:36,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132828469] [2024-11-20 15:00:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:36,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 15:00:36,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:36,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132828469] [2024-11-20 15:00:36,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132828469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:36,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081986092] [2024-11-20 15:00:36,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 15:00:36,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:36,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:36,505 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:36,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 15:00:36,602 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 15:00:36,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:00:36,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 15:00:36,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 15:00:36,638 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 15:00:36,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081986092] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:36,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 15:00:36,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-11-20 15:00:36,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716042805] [2024-11-20 15:00:36,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:36,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 15:00:36,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 15:00:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-20 15:00:36,639 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:36,670 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2024-11-20 15:00:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 15:00:36,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-20 15:00:36,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:36,674 INFO L225 Difference]: With dead ends: 89 [2024-11-20 15:00:36,674 INFO L226 Difference]: Without dead ends: 89 [2024-11-20 15:00:36,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-20 15:00:36,675 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:36,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 138 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:36,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-20 15:00:36,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2024-11-20 15:00:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2024-11-20 15:00:36,678 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 29 [2024-11-20 15:00:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:36,678 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2024-11-20 15:00:36,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2024-11-20 15:00:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-20 15:00:36,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:36,679 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] [2024-11-20 15:00:36,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 15:00:36,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:36,880 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:36,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:36,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1651775668, now seen corresponding path program 2 times [2024-11-20 15:00:36,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:36,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057770459] [2024-11-20 15:00:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:36,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 15:00:37,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:37,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057770459] [2024-11-20 15:00:37,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057770459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:37,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037198447] [2024-11-20 15:00:37,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 15:00:37,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:37,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:37,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:37,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 15:00:37,095 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 15:00:37,095 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:00:37,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-20 15:00:37,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 15:00:37,147 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 15:00:37,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037198447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:37,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:37,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-20 15:00:37,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16195238] [2024-11-20 15:00:37,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:37,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 15:00:37,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 15:00:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-20 15:00:37,213 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:37,262 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2024-11-20 15:00:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 15:00:37,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-20 15:00:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:37,264 INFO L225 Difference]: With dead ends: 89 [2024-11-20 15:00:37,264 INFO L226 Difference]: Without dead ends: 89 [2024-11-20 15:00:37,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-20 15:00:37,264 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:37,265 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 293 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-20 15:00:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-20 15:00:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 88 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2024-11-20 15:00:37,269 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 30 [2024-11-20 15:00:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:37,269 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2024-11-20 15:00:37,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2024-11-20 15:00:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-20 15:00:37,272 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:37,272 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] [2024-11-20 15:00:37,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 15:00:37,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 15:00:37,473 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:37,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:37,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1651817740, now seen corresponding path program 1 times [2024-11-20 15:00:37,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:37,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843938652] [2024-11-20 15:00:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:37,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 15:00:37,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:37,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843938652] [2024-11-20 15:00:37,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843938652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:37,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856136059] [2024-11-20 15:00:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:37,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:37,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:37,570 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:37,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 15:00:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:37,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 15:00:37,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 15:00:37,707 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 15:00:37,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856136059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:37,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 15:00:37,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-11-20 15:00:37,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945507392] [2024-11-20 15:00:37,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:37,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 15:00:37,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:37,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 15:00:37,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-20 15:00:37,709 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:37,767 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2024-11-20 15:00:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 15:00:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-20 15:00:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:37,768 INFO L225 Difference]: With dead ends: 91 [2024-11-20 15:00:37,768 INFO L226 Difference]: Without dead ends: 91 [2024-11-20 15:00:37,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-20 15:00:37,769 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:37,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 162 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-20 15:00:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2024-11-20 15:00:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 88 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2024-11-20 15:00:37,776 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 30 [2024-11-20 15:00:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:37,777 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2024-11-20 15:00:37,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2024-11-20 15:00:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-20 15:00:37,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:37,777 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] [2024-11-20 15:00:37,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 15:00:37,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:37,978 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:37,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:37,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1739610939, now seen corresponding path program 1 times [2024-11-20 15:00:37,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:37,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411475442] [2024-11-20 15:00:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:37,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 15:00:38,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:38,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411475442] [2024-11-20 15:00:38,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411475442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 15:00:38,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 15:00:38,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 15:00:38,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114712792] [2024-11-20 15:00:38,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 15:00:38,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 15:00:38,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:38,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 15:00:38,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-20 15:00:38,145 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:38,209 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2024-11-20 15:00:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 15:00:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-20 15:00:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:38,210 INFO L225 Difference]: With dead ends: 90 [2024-11-20 15:00:38,210 INFO L226 Difference]: Without dead ends: 90 [2024-11-20 15:00:38,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-20 15:00:38,211 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:38,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 150 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 15:00:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-20 15:00:38,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-20 15:00:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 89 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2024-11-20 15:00:38,217 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 32 [2024-11-20 15:00:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:38,217 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2024-11-20 15:00:38,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2024-11-20 15:00:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-20 15:00:38,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:38,218 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:38,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 15:00:38,219 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:38,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash -183294639, now seen corresponding path program 1 times [2024-11-20 15:00:38,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:38,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652412369] [2024-11-20 15:00:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:38,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:38,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652412369] [2024-11-20 15:00:38,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652412369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:38,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250723266] [2024-11-20 15:00:38,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:38,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:38,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:38,636 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:38,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 15:00:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:38,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-20 15:00:38,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:38,764 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 [2024-11-20 15:00:38,786 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 15:00:38,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-20 15:00:38,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:00:38,910 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2024-11-20 15:00:38,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-20 15:00:38,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 29 [2024-11-20 15:00:38,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:00:39,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 15:00:39,331 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 15:00:39,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 29 [2024-11-20 15:00:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:39,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:40,059 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 82 treesize of output 78 [2024-11-20 15:00:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:40,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250723266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:40,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:40,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2024-11-20 15:00:40,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235357384] [2024-11-20 15:00:40,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:40,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-20 15:00:40,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-20 15:00:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2024-11-20 15:00:40,428 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 39 states, 38 states have (on average 1.894736842105263) internal successors, (72), 39 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:41,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:41,269 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2024-11-20 15:00:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 15:00:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.894736842105263) internal successors, (72), 39 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-20 15:00:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:41,271 INFO L225 Difference]: With dead ends: 95 [2024-11-20 15:00:41,271 INFO L226 Difference]: Without dead ends: 95 [2024-11-20 15:00:41,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=209, Invalid=2047, Unknown=0, NotChecked=0, Total=2256 [2024-11-20 15:00:41,273 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:41,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 658 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-20 15:00:41,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-20 15:00:41,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2024-11-20 15:00:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.2) internal successors, (102), 92 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2024-11-20 15:00:41,280 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 32 [2024-11-20 15:00:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:41,281 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2024-11-20 15:00:41,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.894736842105263) internal successors, (72), 39 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2024-11-20 15:00:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-20 15:00:41,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:41,283 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:41,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 15:00:41,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-20 15:00:41,484 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:41,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash -183294638, now seen corresponding path program 1 times [2024-11-20 15:00:41,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:41,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589464656] [2024-11-20 15:00:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:41,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:42,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:42,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589464656] [2024-11-20 15:00:42,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589464656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:42,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920301300] [2024-11-20 15:00:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:42,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:42,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:42,157 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:42,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 15:00:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:42,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-20 15:00:42,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:42,269 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 [2024-11-20 15:00:42,276 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 [2024-11-20 15:00:42,317 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 15:00:42,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-20 15:00:42,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 15:00:42,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:00:42,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 15:00:42,459 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-20 15:00:42,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-20 15:00:42,485 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-20 15:00:42,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-20 15:00:42,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 29 [2024-11-20 15:00:42,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 15:00:42,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-20 15:00:42,983 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:42,998 INFO L349 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2024-11-20 15:00:42,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 41 [2024-11-20 15:00:43,009 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 15:00:43,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2024-11-20 15:00:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:43,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:44,044 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 202 treesize of output 198 [2024-11-20 15:00:44,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:00:44,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 558 treesize of output 542 [2024-11-20 15:00:44,493 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:44,495 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 24 treesize of output 20 [2024-11-20 15:00:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:45,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920301300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:45,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:45,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2024-11-20 15:00:45,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792681483] [2024-11-20 15:00:45,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:45,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-20 15:00:45,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:45,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-20 15:00:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1540, Unknown=0, NotChecked=0, Total=1640 [2024-11-20 15:00:45,196 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:46,379 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2024-11-20 15:00:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 15:00:46,381 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.8) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-20 15:00:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:46,382 INFO L225 Difference]: With dead ends: 95 [2024-11-20 15:00:46,382 INFO L226 Difference]: Without dead ends: 95 [2024-11-20 15:00:46,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=213, Invalid=2439, Unknown=0, NotChecked=0, Total=2652 [2024-11-20 15:00:46,383 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:46,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 857 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-20 15:00:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-20 15:00:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2024-11-20 15:00:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.188235294117647) internal successors, (101), 92 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2024-11-20 15:00:46,386 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 32 [2024-11-20 15:00:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:46,386 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2024-11-20 15:00:46,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.8) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2024-11-20 15:00:46,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-20 15:00:46,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:46,387 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] [2024-11-20 15:00:46,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-20 15:00:46,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-20 15:00:46,592 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:46,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:46,592 INFO L85 PathProgramCache]: Analyzing trace with hash -920253859, now seen corresponding path program 1 times [2024-11-20 15:00:46,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:46,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138654310] [2024-11-20 15:00:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:46,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:00:46,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:46,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138654310] [2024-11-20 15:00:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138654310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:46,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160215128] [2024-11-20 15:00:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:46,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:46,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:46,672 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:46,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 15:00:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:46,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 15:00:46,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:00:46,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:00:46,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160215128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:46,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:46,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-11-20 15:00:46,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882952414] [2024-11-20 15:00:46,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:46,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 15:00:46,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 15:00:46,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-20 15:00:46,833 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:46,908 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2024-11-20 15:00:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 15:00:46,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-20 15:00:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:46,909 INFO L225 Difference]: With dead ends: 84 [2024-11-20 15:00:46,909 INFO L226 Difference]: Without dead ends: 84 [2024-11-20 15:00:46,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-11-20 15:00:46,910 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 98 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:46,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 223 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:00:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-20 15:00:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-20 15:00:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 83 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2024-11-20 15:00:46,913 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 33 [2024-11-20 15:00:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:46,913 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2024-11-20 15:00:46,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2024-11-20 15:00:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-20 15:00:46,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:46,914 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] [2024-11-20 15:00:46,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 15:00:47,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-20 15:00:47,115 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:47,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1673970377, now seen corresponding path program 1 times [2024-11-20 15:00:47,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:47,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057306493] [2024-11-20 15:00:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:47,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:47,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057306493] [2024-11-20 15:00:47,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057306493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303128372] [2024-11-20 15:00:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:47,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:47,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:47,450 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:47,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 15:00:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:47,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-20 15:00:47,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:47,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 15:00:47,595 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 15:00:47,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-20 15:00:47,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:00:47,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:00:47,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2024-11-20 15:00:47,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 15:00:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:00:47,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:48,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2024-11-20 15:00:48,073 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 20 [2024-11-20 15:00:48,080 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 11 treesize of output 9 [2024-11-20 15:00:48,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-20 15:00:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:00:48,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303128372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:48,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:48,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2024-11-20 15:00:48,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507161087] [2024-11-20 15:00:48,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:48,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 15:00:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 15:00:48,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2024-11-20 15:00:48,165 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:48,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:48,692 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2024-11-20 15:00:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 15:00:48,693 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-20 15:00:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:48,693 INFO L225 Difference]: With dead ends: 87 [2024-11-20 15:00:48,693 INFO L226 Difference]: Without dead ends: 87 [2024-11-20 15:00:48,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2024-11-20 15:00:48,694 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:48,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 365 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 15:00:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-20 15:00:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-20 15:00:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 86 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-11-20 15:00:48,697 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 35 [2024-11-20 15:00:48,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:48,697 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-11-20 15:00:48,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-11-20 15:00:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-20 15:00:48,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:48,698 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] [2024-11-20 15:00:48,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-20 15:00:48,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-20 15:00:48,899 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:48,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:48,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1673970376, now seen corresponding path program 1 times [2024-11-20 15:00:48,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:48,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878610251] [2024-11-20 15:00:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:48,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:00:49,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:49,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878610251] [2024-11-20 15:00:49,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878610251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:49,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255533169] [2024-11-20 15:00:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:49,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:49,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:49,237 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:49,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 15:00:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:49,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-20 15:00:49,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:49,336 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 [2024-11-20 15:00:49,339 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 [2024-11-20 15:00:49,395 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 15:00:49,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-20 15:00:49,405 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 15:00:49,406 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 [2024-11-20 15:00:49,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 15:00:49,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:00:49,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:00:49,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2024-11-20 15:00:49,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:00:49,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-20 15:00:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 15:00:49,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:00:50,057 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 21 treesize of output 19 [2024-11-20 15:00:50,058 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 19 treesize of output 17 [2024-11-20 15:00:50,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2024-11-20 15:00:50,062 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:50,063 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 [2024-11-20 15:00:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:00:50,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255533169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:00:50,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:00:50,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 38 [2024-11-20 15:00:50,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733947198] [2024-11-20 15:00:50,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:00:50,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-20 15:00:50,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:00:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-20 15:00:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2024-11-20 15:00:50,239 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:00:50,943 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2024-11-20 15:00:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 15:00:50,943 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-20 15:00:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:00:50,944 INFO L225 Difference]: With dead ends: 89 [2024-11-20 15:00:50,944 INFO L226 Difference]: Without dead ends: 89 [2024-11-20 15:00:50,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=232, Invalid=2630, Unknown=0, NotChecked=0, Total=2862 [2024-11-20 15:00:50,945 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 15:00:50,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 509 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 15:00:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-20 15:00:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-20 15:00:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 88 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2024-11-20 15:00:50,948 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 35 [2024-11-20 15:00:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:00:50,948 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2024-11-20 15:00:50,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:00:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2024-11-20 15:00:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-20 15:00:50,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:00:50,949 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:00:50,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-20 15:00:51,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:51,150 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:00:51,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:00:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1627126577, now seen corresponding path program 2 times [2024-11-20 15:00:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:00:51,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181348953] [2024-11-20 15:00:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:00:51,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:00:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:00:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:51,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:00:51,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181348953] [2024-11-20 15:00:51,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181348953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:00:51,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916427308] [2024-11-20 15:00:51,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 15:00:51,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:00:51,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:00:51,927 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:00:51,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 15:00:52,028 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 15:00:52,028 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:00:52,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-20 15:00:52,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:00:52,037 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 [2024-11-20 15:00:52,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 15:00:52,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 15:00:52,137 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 15:00:52,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-20 15:00:52,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-20 15:00:52,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-20 15:00:52,320 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-20 15:00:52,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-20 15:00:52,402 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-20 15:00:52,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 44 [2024-11-20 15:00:52,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2024-11-20 15:00:53,038 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:00:53,061 INFO L349 Elim1Store]: treesize reduction 81, result has 12.0 percent of original size [2024-11-20 15:00:53,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 73 [2024-11-20 15:00:53,075 INFO L349 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2024-11-20 15:00:53,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 28 [2024-11-20 15:00:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:00:53,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:01:04,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 15:01:04,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:01:04,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1335 treesize of output 1215 [2024-11-20 15:01:04,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 15:01:04,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 15:01:04,380 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:01:04,390 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:01:04,393 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 542 treesize of output 526 [2024-11-20 15:01:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:01:05,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916427308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:01:05,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:01:05,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 52 [2024-11-20 15:01:05,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118691294] [2024-11-20 15:01:05,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:01:05,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-20 15:01:05,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:01:05,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-20 15:01:05,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2524, Unknown=2, NotChecked=0, Total=2652 [2024-11-20 15:01:05,136 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 52 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 52 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:01:07,283 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2024-11-20 15:01:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 15:01:07,284 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 52 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-20 15:01:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:01:07,284 INFO L225 Difference]: With dead ends: 107 [2024-11-20 15:01:07,284 INFO L226 Difference]: Without dead ends: 107 [2024-11-20 15:01:07,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=193, Invalid=3837, Unknown=2, NotChecked=0, Total=4032 [2024-11-20 15:01:07,286 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-20 15:01:07,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1185 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-20 15:01:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-20 15:01:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-11-20 15:01:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.1855670103092784) internal successors, (115), 104 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2024-11-20 15:01:07,289 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 35 [2024-11-20 15:01:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:01:07,289 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2024-11-20 15:01:07,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 52 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2024-11-20 15:01:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-20 15:01:07,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:01:07,290 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] [2024-11-20 15:01:07,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 15:01:07,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-20 15:01:07,491 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:01:07,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:01:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash -353475577, now seen corresponding path program 1 times [2024-11-20 15:01:07,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:01:07,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188715045] [2024-11-20 15:01:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:07,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:01:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:01:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 15:01:07,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:01:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188715045] [2024-11-20 15:01:07,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188715045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:01:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961595104] [2024-11-20 15:01:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:07,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:01:07,779 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:01:07,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 15:01:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:01:07,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 15:01:07,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:01:07,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:01:08,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:01:08,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2024-11-20 15:01:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:01:08,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:01:08,217 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 11 treesize of output 9 [2024-11-20 15:01:08,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-20 15:01:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:01:08,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961595104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:01:08,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:01:08,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2024-11-20 15:01:08,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123837327] [2024-11-20 15:01:08,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:01:08,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-20 15:01:08,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:01:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-20 15:01:08,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2024-11-20 15:01:08,231 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:01:08,763 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2024-11-20 15:01:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 15:01:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-20 15:01:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:01:08,764 INFO L225 Difference]: With dead ends: 107 [2024-11-20 15:01:08,764 INFO L226 Difference]: Without dead ends: 107 [2024-11-20 15:01:08,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=1730, Unknown=0, NotChecked=0, Total=1892 [2024-11-20 15:01:08,765 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 15:01:08,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 654 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 15:01:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-20 15:01:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-11-20 15:01:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.175257731958763) internal successors, (114), 104 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2024-11-20 15:01:08,768 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 36 [2024-11-20 15:01:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:01:08,768 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2024-11-20 15:01:08,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2024-11-20 15:01:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-20 15:01:08,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:01:08,769 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:01:08,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-20 15:01:08,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-20 15:01:08,969 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:01:08,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:01:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1869179866, now seen corresponding path program 2 times [2024-11-20 15:01:08,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:01:08,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299907735] [2024-11-20 15:01:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:08,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:01:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:01:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:01:09,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:01:09,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299907735] [2024-11-20 15:01:09,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299907735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:01:09,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29708831] [2024-11-20 15:01:09,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 15:01:09,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:09,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:01:09,295 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:01:09,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 15:01:09,388 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 15:01:09,388 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:01:09,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-20 15:01:09,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:01:09,398 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 [2024-11-20 15:01:09,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:01:09,473 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 15:01:09,473 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 [2024-11-20 15:01:09,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-20 15:01:09,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:01:09,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 15:01:09,715 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 15:01:09,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2024-11-20 15:01:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:01:09,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:01:10,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-20 15:01:10,080 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 18 treesize of output 16 [2024-11-20 15:01:10,435 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 66 treesize of output 62 [2024-11-20 15:01:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 15:01:10,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29708831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:01:10,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:01:10,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 35 [2024-11-20 15:01:10,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905273596] [2024-11-20 15:01:10,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:01:10,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-20 15:01:10,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:01:10,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-20 15:01:10,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1110, Unknown=0, NotChecked=0, Total=1190 [2024-11-20 15:01:10,599 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:01:11,266 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2024-11-20 15:01:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 15:01:11,267 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-20 15:01:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:01:11,267 INFO L225 Difference]: With dead ends: 105 [2024-11-20 15:01:11,267 INFO L226 Difference]: Without dead ends: 105 [2024-11-20 15:01:11,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=1899, Unknown=0, NotChecked=0, Total=2070 [2024-11-20 15:01:11,268 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-20 15:01:11,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 861 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-20 15:01:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-20 15:01:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-20 15:01:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 104 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2024-11-20 15:01:11,271 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 37 [2024-11-20 15:01:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:01:11,271 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2024-11-20 15:01:11,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2024-11-20 15:01:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-20 15:01:11,272 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:01:11,272 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 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] [2024-11-20 15:01:11,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-20 15:01:11,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-20 15:01:11,473 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:01:11,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:01:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash -386172672, now seen corresponding path program 1 times [2024-11-20 15:01:11,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:01:11,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298974902] [2024-11-20 15:01:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:11,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:01:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:01:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:01:11,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:01:11,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298974902] [2024-11-20 15:01:11,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298974902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:01:11,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278806290] [2024-11-20 15:01:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:11,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:11,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:01:11,690 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:01:11,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 15:01:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:01:11,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 15:01:11,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:01:11,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:01:11,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:01:11,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-20 15:01:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:01:12,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:01:12,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-20 15:01:12,181 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 18 treesize of output 16 [2024-11-20 15:01:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:01:12,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278806290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:01:12,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:01:12,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 21 [2024-11-20 15:01:12,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562409506] [2024-11-20 15:01:12,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:01:12,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 15:01:12,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:01:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 15:01:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2024-11-20 15:01:12,197 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:01:12,560 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2024-11-20 15:01:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 15:01:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-20 15:01:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:01:12,561 INFO L225 Difference]: With dead ends: 106 [2024-11-20 15:01:12,561 INFO L226 Difference]: Without dead ends: 106 [2024-11-20 15:01:12,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2024-11-20 15:01:12,561 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 15:01:12,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 373 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 15:01:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-20 15:01:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-20 15:01:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 98 states have (on average 1.153061224489796) internal successors, (113), 105 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2024-11-20 15:01:12,564 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 38 [2024-11-20 15:01:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:01:12,564 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2024-11-20 15:01:12,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2024-11-20 15:01:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-20 15:01:12,565 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:01:12,565 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:01:12,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-20 15:01:12,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-20 15:01:12,770 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:01:12,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:01:12,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1283014744, now seen corresponding path program 3 times [2024-11-20 15:01:12,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:01:12,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189415176] [2024-11-20 15:01:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:12,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:01:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:01:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 15:01:12,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:01:12,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189415176] [2024-11-20 15:01:12,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189415176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:01:12,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689484134] [2024-11-20 15:01:12,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 15:01:12,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:12,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:01:12,871 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:01:12,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 15:01:12,981 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-20 15:01:12,981 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:01:12,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 15:01:12,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:01:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 15:01:13,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:01:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 15:01:13,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689484134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:01:13,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:01:13,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-20 15:01:13,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045023504] [2024-11-20 15:01:13,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:01:13,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 15:01:13,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:01:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 15:01:13,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-20 15:01:13,049 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:13,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:01:13,116 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2024-11-20 15:01:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 15:01:13,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-20 15:01:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:01:13,117 INFO L225 Difference]: With dead ends: 138 [2024-11-20 15:01:13,117 INFO L226 Difference]: Without dead ends: 138 [2024-11-20 15:01:13,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2024-11-20 15:01:13,118 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 47 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 15:01:13,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 206 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 15:01:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-20 15:01:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 123. [2024-11-20 15:01:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 122 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 132 transitions. [2024-11-20 15:01:13,121 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 132 transitions. Word has length 39 [2024-11-20 15:01:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:01:13,121 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 132 transitions. [2024-11-20 15:01:13,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 132 transitions. [2024-11-20 15:01:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-20 15:01:13,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:01:13,122 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:01:13,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-20 15:01:13,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:13,323 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:01:13,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:01:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash -61099160, now seen corresponding path program 3 times [2024-11-20 15:01:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:01:13,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185262742] [2024-11-20 15:01:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:01:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:01:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 15:01:13,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:01:13,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185262742] [2024-11-20 15:01:13,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185262742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:01:13,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298312681] [2024-11-20 15:01:13,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 15:01:13,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:13,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:01:13,478 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:01:13,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 15:01:13,589 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 15:01:13,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:01:13,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 15:01:13,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:01:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 15:01:13,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:01:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 15:01:13,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298312681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:01:13,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:01:13,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-11-20 15:01:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784671363] [2024-11-20 15:01:13,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:01:13,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 15:01:13,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:01:13,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 15:01:13,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-20 15:01:13,741 INFO L87 Difference]: Start difference. First operand 123 states and 132 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:01:13,849 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2024-11-20 15:01:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 15:01:13,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-20 15:01:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:01:13,850 INFO L225 Difference]: With dead ends: 138 [2024-11-20 15:01:13,850 INFO L226 Difference]: Without dead ends: 138 [2024-11-20 15:01:13,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-20 15:01:13,851 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 20 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 15:01:13,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 485 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 15:01:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-20 15:01:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2024-11-20 15:01:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 127 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2024-11-20 15:01:13,855 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 40 [2024-11-20 15:01:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:01:13,856 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2024-11-20 15:01:13,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2024-11-20 15:01:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-20 15:01:13,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:01:13,856 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:01:13,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-20 15:01:14,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-20 15:01:14,057 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:01:14,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:01:14,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1747434268, now seen corresponding path program 2 times [2024-11-20 15:01:14,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:01:14,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027422656] [2024-11-20 15:01:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:14,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:01:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:01:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 15:01:14,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:01:14,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027422656] [2024-11-20 15:01:14,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027422656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:01:14,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146377396] [2024-11-20 15:01:14,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 15:01:14,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:14,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:01:14,441 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:01:14,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 15:01:14,570 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 15:01:14,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:01:14,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-20 15:01:14,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:01:14,600 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 [2024-11-20 15:01:14,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 15:01:14,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 15:01:14,722 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 15:01:14,722 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 [2024-11-20 15:01:14,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-20 15:01:14,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-20 15:01:15,338 INFO L349 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2024-11-20 15:01:15,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 36 [2024-11-20 15:01:15,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:01:15,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-20 15:01:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 15:01:15,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:01:15,964 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (let ((.cse1 (select .cse0 0))) (and (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse0) .cse1) 0) 0) (forall ((v_ArrVal_957 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_957) .cse1) 0) 0))))) is different from false [2024-11-20 15:01:20,153 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 46 treesize of output 42 [2024-11-20 15:01:20,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:01:20,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-20 15:01:20,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:01:20,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2024-11-20 15:01:20,197 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 [2024-11-20 15:01:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2024-11-20 15:01:20,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146377396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:01:20,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:01:20,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 20] total 48 [2024-11-20 15:01:20,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169717050] [2024-11-20 15:01:20,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:01:20,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-20 15:01:20,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:01:20,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-20 15:01:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2047, Unknown=2, NotChecked=90, Total=2256 [2024-11-20 15:01:20,343 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:01:21,797 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2024-11-20 15:01:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-20 15:01:21,797 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-20 15:01:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:01:21,798 INFO L225 Difference]: With dead ends: 151 [2024-11-20 15:01:21,798 INFO L226 Difference]: Without dead ends: 151 [2024-11-20 15:01:21,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=209, Invalid=3453, Unknown=2, NotChecked=118, Total=3782 [2024-11-20 15:01:21,799 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-20 15:01:21,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 865 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1292 Invalid, 0 Unknown, 52 Unchecked, 0.8s Time] [2024-11-20 15:01:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-20 15:01:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-11-20 15:01:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.118881118881119) internal successors, (160), 150 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 160 transitions. [2024-11-20 15:01:21,802 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 160 transitions. Word has length 41 [2024-11-20 15:01:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:01:21,803 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 160 transitions. [2024-11-20 15:01:21,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 160 transitions. [2024-11-20 15:01:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-20 15:01:21,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:01:21,804 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2024-11-20 15:01:21,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-20 15:01:22,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:22,007 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:01:22,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:01:22,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1664113982, now seen corresponding path program 2 times [2024-11-20 15:01:22,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:01:22,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865398179] [2024-11-20 15:01:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:01:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:01:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:01:22,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:01:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865398179] [2024-11-20 15:01:22,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865398179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:01:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157029344] [2024-11-20 15:01:22,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 15:01:22,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:01:22,479 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:01:22,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 15:01:22,597 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 15:01:22,597 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:01:22,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-20 15:01:22,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:01:22,650 INFO L349 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2024-11-20 15:01:22,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 39 [2024-11-20 15:01:22,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:01:22,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 15:01:22,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-11-20 15:01:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:01:23,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:01:23,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-20 15:01:23,552 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 38 treesize of output 36 [2024-11-20 15:01:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 15:01:24,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157029344] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:01:24,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:01:24,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2024-11-20 15:01:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687857385] [2024-11-20 15:01:24,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:01:24,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-20 15:01:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:01:24,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-20 15:01:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2024-11-20 15:01:24,144 INFO L87 Difference]: Start difference. First operand 151 states and 160 transitions. Second operand has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:01:25,179 INFO L93 Difference]: Finished difference Result 153 states and 161 transitions. [2024-11-20 15:01:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 15:01:25,180 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-20 15:01:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:01:25,180 INFO L225 Difference]: With dead ends: 153 [2024-11-20 15:01:25,180 INFO L226 Difference]: Without dead ends: 116 [2024-11-20 15:01:25,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=151, Invalid=1919, Unknown=0, NotChecked=0, Total=2070 [2024-11-20 15:01:25,181 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-20 15:01:25,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 548 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-20 15:01:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-20 15:01:25,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-11-20 15:01:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 108 states have (on average 1.1481481481481481) internal successors, (124), 115 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2024-11-20 15:01:25,185 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 42 [2024-11-20 15:01:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:01:25,185 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2024-11-20 15:01:25,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2024-11-20 15:01:25,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-20 15:01:25,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:01:25,186 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:01:25,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-20 15:01:25,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:25,390 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:01:25,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:01:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1155669199, now seen corresponding path program 4 times [2024-11-20 15:01:25,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:01:25,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879448054] [2024-11-20 15:01:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:25,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:01:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 15:01:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 15:01:26,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 15:01:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879448054] [2024-11-20 15:01:26,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879448054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 15:01:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121695110] [2024-11-20 15:01:26,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 15:01:26,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:26,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 15:01:26,355 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 15:01:26,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-20 15:01:26,470 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 15:01:26,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 15:01:26,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-20 15:01:26,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 15:01:26,476 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 [2024-11-20 15:01:26,496 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 15:01:26,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-20 15:01:26,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:01:26,626 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2024-11-20 15:01:26,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2024-11-20 15:01:26,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 15:01:26,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 29 [2024-11-20 15:01:26,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 15:01:26,864 INFO L349 Elim1Store]: treesize reduction 90, result has 36.6 percent of original size [2024-11-20 15:01:26,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 69 [2024-11-20 15:01:26,991 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-20 15:01:26,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 52 [2024-11-20 15:01:27,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 15:01:27,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-20 15:01:27,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 15:01:27,593 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 15:01:27,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2024-11-20 15:01:27,783 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2024-11-20 15:01:27,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 49 [2024-11-20 15:01:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 15:01:27,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 15:01:32,979 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 62 treesize of output 58 [2024-11-20 15:01:41,908 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 15:01:41,909 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 210 treesize of output 206 [2024-11-20 15:01:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 15:01:43,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121695110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 15:01:43,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 15:01:43,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 54 [2024-11-20 15:01:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193760309] [2024-11-20 15:01:43,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 15:01:43,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-20 15:01:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 15:01:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-20 15:01:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2760, Unknown=2, NotChecked=0, Total=2970 [2024-11-20 15:01:43,572 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 55 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 15:01:45,679 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2024-11-20 15:01:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 15:01:45,679 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-20 15:01:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 15:01:45,680 INFO L225 Difference]: With dead ends: 121 [2024-11-20 15:01:45,680 INFO L226 Difference]: Without dead ends: 121 [2024-11-20 15:01:45,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=378, Invalid=4312, Unknown=2, NotChecked=0, Total=4692 [2024-11-20 15:01:45,681 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-20 15:01:45,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 866 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-20 15:01:45,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-20 15:01:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2024-11-20 15:01:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 111 states have (on average 1.162162162162162) internal successors, (129), 118 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2024-11-20 15:01:45,684 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 42 [2024-11-20 15:01:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 15:01:45,685 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2024-11-20 15:01:45,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 15:01:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2024-11-20 15:01:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-20 15:01:45,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 15:01:45,686 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 15:01:45,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-20 15:01:45,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 15:01:45,886 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 15:01:45,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 15:01:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1155669200, now seen corresponding path program 2 times [2024-11-20 15:01:45,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 15:01:45,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311274271] [2024-11-20 15:01:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 15:01:45,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 15:01:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat